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Our client is a cyber security company. As an Android Security Researcher, you will be responsible for conducting cutting-edge research on the Android platform, developing working prototypes, reverse engineering (static and dynamic) and testing software to identify implementation vulnerabilities. Your expertise in Android internals, application modification, software modification, and firmware modification will enable you to analyze and understand the underlying mechanics of the Android ecosystem. You will deliver complex projects working individually or within / leading a team, delivering industry leading research and critical capabilities to our customers. Tasks may range from understanding Android and building AOSP, researching its internals for opportunities and its applications inside out and, not limited to network forensics, forensics, SRE both static and dynamically and building/pathing APK's. By their nature, these tasks are often objective-driven and require an inquisitive mindset to develop innovative solutions that may not be immediately obvious. In this role you will be researching new emerging technologies in Android to understand and evaluate features and functions that impact our customers. This includes identifying any vulnerabilities or opportunities in their implementation to design bespoke PoC solutions to take advantage of these. The role will also involve developing, modifying & building AOSP images for research and testing PoC's. Our team use a wide range of tools and programming languages but of particular interest for this role are C/C++, Arm assembly and Frida with a focus on Android. If you are currently working as an Android/iOS developer and have an interest in moving to security research and reverse engineering, we would be interested in having a chat. You will have: Experience in Android security research or a related field In-depth knowledge of Android internals, including system services, APIs, and device drivers Proficiency with Frida, including scripting and API usage Static and Dynamic Analysis of Mobile Applications including Frida Experience building and customizing AOSP for research purposes Strong understanding of application modification, software modification, or firmware modification techniques Excellent programming skills in languages such as Java/Kotlin, C, C++, and Python Knowledge of low-level programming languages such as Assembly or ARM Strong analytical and problem-solving skills, with the ability to think creatively and outside the box Nice to have: Experience with other mobile platforms (e.g., iOS, Harmony) Familiarity with Linux kernel development and debugging Participation in bug bounty programs or capture-the-flag (CTF) competitions Publications or presentations on Android security research topics Network and Protocol analysis Work Benefits: Promotions are based on technical excellence and reviewed regularly 25 days holiday per year (with bank holidays on top), option to buy up to 5 days per year Level up with an extra day of holiday per year, up to an extra 5 days, starting from 2 years' service We offer financial support to cover HMRC allowable costs of relocating if you're moving to the area Training and development opportunities to support your career aspirations O'Reilly books subscription which provides access to huge range of technical books Regular events including internal technical conferences, company socials and pizza-fuelled lunchtime seminars Free seasonal fruit, tea, coffee, milk, squash and hot chocolate Health benefits - Private medical including access to Private online GP, and a helpline to speak with various healthcare professionals. Physiotherapists, osteopaths or chiropractors for muscle, bone, and joint pain. Mental health - counselling, and specialist consultations and treatment with psychologists and cognitive behavioural therapists. Annual Health assessment. Financial Benefits A company bonus scheme so that everybody is rewarded for company success. This is an annual award that is based on the company hitting its targeted forecast. We have achieved this every year to date. 8% company contribution to pension with no minimum requirement for employee contribution. Death in Service cover of 4x base salary. Lifestyle Benefits Enhanced maternity/paternity/adoption leave: 12 weeks maternity leave at full pay as soon as you join, further enhanced to 20 weeks full pay from 2 years' service. 2 weeks paternity leave at full pay as soon as you join, further enhanced to 4 weeks full pay from 2 years' service. Enhanced cycle-to-work scheme including the ability to purchase a bike over £1,000 (e-bikes, specialist cycles and trikes allowed). TPBN1_UKTJ

Our Capability Development team develops bespoke software for our clients in the Cyber Security domain. We may be building assured software that prioritises engineering rigour and reliability, rapid solutions that bring together existing tooling for high-impact results, or blended operational systems that address real-world challenges in the field. Common to all is a commitment to technically led decisions, meaningful technical challenge, and engaging career paths where your work makes it off the shelf and into the hands of our customers. Across our projects, we work with a range of platforms, languages and delivery environments. This may include web applications, native applications, automation, data processing, integration work, mobile platforms, Linux systems, cloud or on-premise deployments, and specialist operational environments. We are interested in engineers who are comfortable adapting to different technical contexts and choosing appropriate tools for the problem at hand. This role is aimed at software engineers with experience delivering software projects using interpreted languages and modern development practices. You may have worked with languages such as Python, Rust, JavaScript, C++, TypeScript, Go or similar, alongside experience building user-facing systems, APIs, services, native applications or tooling. We are less concerned with a fixed technology stack and more interested in strong engineering fundamentals, practical problem solving, and the ability to deliver useful, maintainable software. We are led by engineers and empowered to optimise our lightweight development processes with the knowledge gained from each project. We value people who take ownership, communicate clearly, work well in small teams, and enjoy seeing software make a difference. We are ideally looking for a candidate who holds an active Security Clearance to join our team, however, we will consider sponsoring new clearances for candidates that meet our technical requirements. As part of our team, you may be: • Designing and developing new software products, tools or capabilities from early concept through to delivery., • Adding new features to, improving, or replacing components within existing systems., • Building prototypes to explore technical options, validate ideas and help shape project direction., • Developing web, native, service-side or automation-focused software depending on project need., • Integrating applications, APIs, third-party tools or internal systems to deliver practical outcomes., • Working with colleagues and customers to understand requirements and turn them into reliable software. For this role, you will be hands-on in the day-to-day delivery of projects. Typically, this will see you working with one or two other colleagues at a time, taking responsibility for implementation decisions while contributing to wider project planning and delivery. You will help maintain high engineering standards through clear design, readable code, testing, review and pragmatic technical decision-making. You may also support junior colleagues by sharing knowledge, encouraging good development practices, and helping the team balance quality, maintainability and realistic delivery timescales. Successful candidates will have experience in some of the following areas: • Professional experience delivering software projects using interpreted or high-level languages., • Experience building web applications, APIs, services, automation, native applications or internal tools., • Comfortable working across different parts of a system, from user interfaces through to backend services, integration points and deployment environments., • Ability to understand requirements, make sensible technical decisions and deliver maintainable software., • Experience working with existing codebases, including debugging, refactoring and adding new functionality., • Familiarity with modern software engineering practices such as code review, automated testing, continuous integration and version control., • Comfortable learning unfamiliar technologies, libraries or platforms when required by a project., • Strong problem-solving skills and the ability to work effectively in small, technically focused teams., • Clear communication skills, including the ability to explain technical decisions and collaborate with colleagues or customers. This vacancy is for experienced software engineers who enjoy delivering practical, maintainable software across a range of technologies and project types. It is well suited to engineers who are adaptable, delivery-focused, and comfortable working across both web and native development environments. • Promotions are based on technical excellence and reviewed regularly., • 25 days holiday per year (with bank holidays on top), option to buy up to 5 days per year., • Level up with an extra day of holiday per year, up to an extra 5 days, starting from 2 years’ service., • We offer financial support to cover HMRC allowable costs of relocating if you’re moving to the area., • Training and development opportunities to support your career aspirations, • O’Reilly books subscription which provides access to huge range of technical books, • Regular events including internal technical conferences, company socials and pizza-fuelled lunchtime seminars., • Free seasonal fruit, tea, coffee, milk, squash and hot chocolate., • Private online GP, and a helpline to speak with various healthcare professionals., • Physiotherapists, osteopaths or chiropractors for muscle, bone, and joint pain., • Mental health - counselling, and specialist consultations and treatment with psychologists and cognitive behavioural therapists., • Annual Health assessment., • A company bonus scheme so that everybody is rewarded for company success. This is an annual award that is based on the company hitting its targeted forecast. We have achieved this every year to date., • 8% company contribution to pension with no minimum requirement for employee contribution., • Death in Service cover of 4x base salary., • Enhanced maternity/paternity/adoption leave: 12 weeks maternity leave at full pay as soon as you join, further enhanced to 20 weeks full pay from 2 years’ service. 2 weeks paternity leave at full pay as soon as you join, further enhanced to 4 weeks full pay from 2 years’ service., • Enhanced cycle-to-work scheme including the ability to purchase a bike over £1,000 (e-bikes, specialist cycles and trikes allowed). We are recruiting staff at all levels in this team, and are able to support market-leading salaries for every grade within our sector/location. We reward staff based on technical excellence and not years of experience, so it’s important to us to speak with you to see which grade you would fit into - it’s not always obvious from a CV! Your interviewer will spend time during your first interview speaking with you about how your skills and experience map against our grades, and discuss a salary band so that you know early what you can expect if you receive an offer from us. The technical interview will provide a deeper assessment of your skills against your mapped grade which ultimately determines whether you receive an offer and the exact salary. We are based in the centre of Cheltenham in a stunning new build contemporary office, 5 minutes walk from the local shops and cafes. Our interview process is quick and to the point: if you look like a good fit for the role, we’ll schedule a brief call to discuss it in more detail and answer any questions you may have. If that goes well, we’ll arrange a technical interview to understand your level of experience. We aim to get back to you with an answer within a couple of days of the technical interview. #J-18808-Ljbffr

Our Capability Development team develops bespoke software for our clients in the Cyber Security domain. We may be building assured software that prioritises engineering rigour and reliability, rapid cyber solutions that stitch together tooling for high-impact results, or blended operational systems that address real-world challenges in the field. Common to all is commitment to technically led decisions, to meaningful technical challenge, and to engaging career paths where your work makes it off the shelf and into the hands of our customers. All of our roles demand strong technical expertise, meticulous attention to detail, and a commitment to delivering robust, dependable solutions that our clients can rely on when it matters most. Across our projects, we work on a variety of platforms; typically iOS, Android, and Linux, with opportunities on embedded systems and other specialised platforms. Our bread and butter is C, C++, and Java, but we're comfortable in Python, Rust, and JavaScript. We emphasise having a comprehensive understanding of the programming languages, platforms, and tooling we rely on. That deep technical knowledge has helped us earn a reputation for writing novel, robust, and maintainable solutions to our client's challenging and fascinating problems and we regularly see the direct impact of our work. We're led by engineers and empowered to optimise our (lightweight!) development processes with the knowledge gained from each project. We are looking for a candidate who holds an active Developed Vetting security clearance to join our team. • Designing a new clean-slate product with complete autonomy over its architecture., • Adding new capabilities to, or replacing a core component of, an existing product., • Throwing together a quick-and-dirty prototype to confirm the feasibility of a proposed technical approach; iterating until it meets requirements. For this role you'll be hands-on in the day-to-day delivery of projects. Typically, this will see you working with one or two other colleagues at a time. In addition, you'll take an active role in unlocking the potential of junior colleagues: encouraging idiomatic code, demonstrating engineering rigour, and sharing hard-won knowledge with your peers. You’ll also help drive our engineering processes to maintain code quality while balancing realistic delivery timescales and client requirements. • Professional experience in the design and implementation of complex projects, ideally both clean-slate projects and updates to legacy code bases., • Comfortable with platform APIs, development environments and native debugging approaches., • Experience leading a team of developers through a complete project lifecycle, engaging in requirements capture, design review, implementation, and assurance., • Commitment to code correctness and quality assurance through static analysis, code review, automated testing, and continuous integration. This vacancy is for experienced software engineers and will require skills and experience in several of the areas listed as well as the ability to lead technical projects. • Promotions are based on technical excellence and reviewed regularly., • 25 days holiday per year (with bank holidays on top), option to buy up to 5 days per year., • Level up with an extra day of holiday per year, up to an extra 5 days, starting from 2 years' service., • We offer financial support to cover HMRC allowable costs of relocating if you’re moving to the area., • Training and development opportunities to support your career aspirations, • O'Reilly books subscription which provides access to huge range of technical books, • Regular events including internal technical conferences, company socials and pizza-fuelled lunchtime seminars., • Free seasonal fruit, tea, coffee, milk, squash and hot chocolate., • Private online GP, and a helpline to speak with various healthcare professionals., • Physiotherapists, osteopaths or chiropractors for muscle, bone, and joint pain., • Mental health - counselling, and specialist consultations and treatment with psychologists and cognitive behavioural therapists., • Annual Health assessment., • A company bonus scheme so that everybody is rewarded for company success. This is an annual award that is based on the company hitting its targeted forecast. We have achieved this every year to date., • 8% company contribution to pension with no minimum requirement for employee contribution., • Death in Service cover of 4x base salary., • Enhanced maternity/paternity/adoption leave: 12 weeks maternity leave at full pay as soon as you join, further enhanced to 20 weeks full pay from 2 years’ service. 2 weeks paternity leave at full pay as soon as you join, further enhanced to 4 weeks full pay from 2 years’ service., • Enhanced cycle-to-work scheme including the ability to purchase a bike over £1,000 (e-bikes, specialist cycles and trikes allowed). We are recruiting staff at all levels in this team, and are able to support market-leading salaries for every grade within our sector/location. We reward staff based on technical excellence and not years of experience, so it's important to us to speak with you to see which grade you would fit into - it's not always obvious from a CV! Your interviewer will spend time during your first interview speaking with you about how your skills and experience map against our grades, and discuss a salary band so that you know early what you can expect if you receive an offer from us. The technical interview will provide a deeper assessment of your skills against your mapped grade which ultimately determines whether you receive an offer and the exact salary. We are based in the centre of Cheltenham in a stunning new build contemporary office, 5 minutes walk from the local shops and cafes. Our interview process is quick and to the point: if you look like a good fit for the role, we'll schedule a brief call to discuss it in more detail and answer any questions you may have. If that goes well, we'll arrange a technical interview to understand your level of experience. We aim to get back to you with an answer within a couple of days of the technical interview. Please note, due to sensitivity of the role, successful applicants must hold an active Developed Vetting security clearance. #J-18808-Ljbffr

Our client is a cyber security company. Our Capability Development team develops bespoke end-to-end solutions for clients in the Cyber Security domain. Historically, this has meant a specialism in C and C++ development across embedded and mobile platforms, including iOS, Android, Windows, macOS and Linux variants. We emphasise having a comprehensive understanding of the programming languages, platforms, and tooling we rely on, and are seeing an increased need to deliver an end-to-end product in increasingly short timescales, delivering mission value as quickly as possible. That deep technical knowledge has helped us earn a reputation for writing novel, robust, and maintainable solutions to our client's challenging and fascinating problems! Our projects are typically delivered by 2-4 person teams over months, rather than years, with daily opportunities to see the direct impact of our work. We're led by engineers and empowered to optimise our (lightweight!) development processes with the knowledge gained from each project. We are looking for a candidate who holds an active Developed Vetting security clearance to join our team, with experience in producing high-quality end-to-end products across a variety of platforms. As part of our team, you may be Designing a new clean-slate product with complete autonomy over its architecture. Adding new capabilities to, or replacing a core component of, an existing product. Throwing together a quick-and-dirty prototype to confirm the feasibility of a proposed technical approach; iterating until it meets requirements. For this role you'll be hands-on in the day-to-day delivery of projects. Typically, this will see you working with one or two other colleagues at a time. In addition, you'll take an active role in unlocking the potential of junior colleagues: encouraging idiomatic code, demonstrating engineering rigour, and sharing hard-won knowledge with your peers. You'll also help drive our engineering processes to maintain code quality while balancing realistic delivery timescales and client requirements. Desirable Skills Professional experience in the design and implementation of complex solutions that leverage existing platform capabilities to rapidly deliver effects. Comfortable with platform APIs, development environments and native debugging approaches on one or more of: Windows, macOS, Linux, iOS, or Android. Experiencing leading a small or midsize team of developers through a complete project lifecycle, engaging in requirements capture, design review, implementation, and assurance. Commitment to code correctness and quality assurance through static analysis, code review, automated testing, and continuous integration. This vacancy is for experienced software engineers and will require skills and experience in several of the areas listed as well as the ability to lead technical projects. Work Benefits Promotions are based on technical excellence and reviewed regularly. 25 days holiday per year (with bank holidays on top), option to buy up to 5 days per year. Level up with an extra day of holiday per year, up to an extra 5 days, starting from 2 years' service. We offer financial support to cover HMRC allowable costs of relocating if you're moving to the area. Training and development opportunities to support your career aspirations O'Reilly books subscription which provides access to huge range of technical books Regular events including internal technical conferences, company socials and pizza-fuelled lunchtime seminars. Free seasonal fruit, tea, coffee, milk, squash and hot chocolate. Health Benefits - Private medical including access to Private online GP, and a helpline to speak with various healthcare professionals. Physiotherapists, osteopaths or chiropractors for muscle, bone, and joint pain. Mental health - counselling, and specialist consultations and treatment with psychologists and cognitive behavioural therapists. Annual Health assessment. Financial Benefits A company bonus scheme so that everybody is rewarded for company success. This is an annual award that is based on the company hitting its targeted forecast. We have achieved this every year to date. 8% company contribution to pension with no minimum requirement for employee contribution. Death in Service cover of 4x base salary. Lifestyle Benefits Enhanced maternity/paternity/adoption leave: 12 weeks maternity leave at full pay as soon as you join, further enhanced to 20 weeks full pay from 2 years' service. 2 weeks paternity leave at full pay as soon as you join, further enhanced to 4 weeks full pay from 2 years' service. Enhanced cycle-to-work scheme including the ability to purchase a bike over £1,000 (e-bikes, specialist cycles and trikes allowed). TPBN1_UKTJ

Our client is a cyber security company. Our Software Engineering team develops bespoke capabilities for clients in the Cyber Security domain. We may be building assured products that prioritise engineering rigour and reliability, rapid solutions that bring together existing tooling for high-impact results, or blended operational systems that combine software, hardware, networks and third-party technologies to address real-world challenges in the field. Common to all is a commitment to technically led decisions, meaningful technical challenge, and seeing our work make it off the shelf and into the hands of our customers. As our projects increasingly bring together multiple technologies and engineering disciplines, we are looking for a Principal Systems Engineer, operating as the systems architect and cross-discipline technical authority on our larger projects, to take technical ownership of complete systems from early concept through delivery and acceptance. This role may suit an experienced Systems Architect, Lead Systems Engineer or Technical Authority who wants to remain closely involved throughout integration and delivery. There is also opportunity to grow the scope of this role to encompass the professionalisation of engineering across multiple projects and teams. This role is about making sure we build the right system , not simply building individual components well. You will work with customers and engineers to understand operational problems, establish system requirements and architecture, make informed technical trade-offs, manage interfaces and guide systems through integration, verification and validation. You will be equally comfortable discussing a customer's operational need, reviewing a software or network architecture, understanding the constraints imposed by a hardware component, and deciding how the complete system can be demonstrated to meet its requirements. We're led by engineers and empowered to optimise our lightweight engineering processes with the knowledge gained from each project. We are not looking to introduce process for its own sake; we want systems engineering practices that help teams make better technical decisions, expose problems early and deliver dependable capability. We are ideally looking for a candidate who holds an active Security Clearance to join our team; however, we will consider sponsoring new clearances for candidates who meet our technical requirements. Key Responsibilties As a Principal Systems Engineer, you may be: Working with customers and engineering teams to turn operational needs into clear system objectives, requirements and acceptance criteria. Defining system architectures, boundaries and interfaces across software, hardware, networks, infrastructure and third-party technologies. Leading technical trade-offs, balancing performance, security, risk, complexity and delivery constraints. Defining integration, verification and validation strategies and providing technical leadership through system integration and acceptance. Acting as technical authority for multidisciplinary projects, managing technical risks and helping establish pragmatic systems engineering practices across Software Engineering. This is a hands-on technical leadership role. You will typically work closely with small engineering teams rather than operating as a separate governance function. You will also help establish pragmatic systems engineering practices across Software Engineering, mentoring colleagues and identifying where additional rigour provides genuine engineering value. Desirable Skills Successful candidates will have strong experience in several of the following areas: Designing and delivering complex systems involving multiple interacting technologies or engineering disciplines. Requirements engineering, system architecture, functional decomposition and interface management. Planning and leading system integration, verification, validation and customer acceptance activities. Evaluating technical options and communicating engineering trade-offs covering areas such as performance, reliability, security, maintainability, cost and delivery risk. Technical leadership within multidisciplinary teams, ideally in domains such as defence, cyber security, communications, aerospace, robotics or other complex systems environments. Familiarity with systems modelling, architecture frameworks, SysML, requirements management tools or MBSE approaches is useful, but practical systems thinking is more important than experience with a particular methodology or tool. This vacancy is for an experienced technical leader who enjoys understanding the complete problem, bringing structure to ambiguity and helping multidisciplinary engineering teams turn individual technologies into coherent, dependable systems. Work Benefits Promotions are based on technical excellence and reviewed regularly. 25 days holiday per year (with bank holidays on top), option to buy up to 5 days per year. Level up with an extra day of holiday per year, up to an extra 5 days, starting from 2 years' service. We offer financial support to cover HMRC allowable costs of relocating if you're moving to the area. Training and development opportunities to support your career aspirations O'Reilly books subscription which provides access to huge range of technical books Regular events including internal technical conferences, company socials and pizza-fuelled lunchtime seminars. Free seasonal fruit, tea, coffee, milk, squash and hot chocolate. Health Benefits - Private medical including access to Private online GP, and a helpline to speak with various healthcare professionals. Physiotherapists, osteopaths or chiropractors for muscle, bone, and joint pain. Mental health - counselling, and specialist consultations and treatment with psychologists and cognitive behavioural therapists. Annual Health assessment. Financial Benefits A company bonus scheme so that everybody is rewarded for company success. This is an annual award that is based on the company hitting its targeted forecast. We have achieved this every year to date. 8% company contribution to pension with no minimum requirement for employee contribution. Death in Service cover of 4x base salary. Lifestyle Benefits Enhanced maternity/paternity/adoption leave: 12 weeks maternity leave at full pay as soon as you join, further enhanced to 20 weeks full pay from 2 years' service. 2 weeks paternity leave at full pay as soon as you join, further enhanced to 4 weeks full pay from 2 years' service. Enhanced cycle-to-work scheme including the ability to purchase a bike over £1,000 (e-bikes, specialist cycles and trikes allowed). TPBN1_UKTJ

Our client is a cyber security company. Our Capability Development team develops bespoke software for our clients in the Cyber Security domain. We may be building assured software that prioritises engineering rigour and reliability, rapid cyber solutions that stitch together tooling for high-impact results, or blended operational systems that address real-world challenges in the field. Common to all is commitment to technically led decisions, to meaningful technical challenge, and to engaging career paths where your work makes it off the shelf and into the hands of our customers. All of our roles demand strong technical expertise, meticulous attention to detail, and a commitment to delivering robust, dependable solutions that our clients can rely on when it matters most. Across our projects, we work on a variety of platforms; typically iOS, Android, and Linux, with opportunities on embedded systems and other specialised platforms. Our bread and butter is C, C++, and Java, but we're comfortable in Python, Rust, and JavaScript. We emphasise having a comprehensive understanding of the programming languages, platforms, and tooling we rely on. That deep technical knowledge has helped us earn a reputation for writing novel, robust, and maintainable solutions to our client's challenging and fascinating problems and we regularly see the direct impact of our work. We're led by engineers and empowered to optimise our (lightweight!) development processes with the knowledge gained from each project. We are looking for a candidate who holds an active Developed Vetting security clearance to join our team. Key Responsibilities Designing a new clean-slate product with complete autonomy over its architecture. Adding new capabilities to, or replacing a core component of, an existing product. Throwing together a quick-and-dirty prototype to confirm the feasibility of a proposed technical approach; iterating until it meets requirements. For this role you'll be hands-on in the day-to-day delivery of projects. Typically, this will see you working with one or two other colleagues at a time. In addition, you'll take an active role in unlocking the potential of junior colleagues: encouraging idiomatic code, demonstrating engineering rigour, and sharing hard-won knowledge with your peers. You'll also help drive our engineering processes to maintain code quality while balancing realistic delivery timescales and client requirements. Desirable Skills Professional experience in the design and implementation of complex projects, ideally both clean-slate projects and updates to legacy code bases. Comfortable with platform APIs, development environments and native debugging approaches. Experience leading a team of developers through a complete project lifecycle, engaging in requirements capture, design review, implementation, and assurance. Commitment to code correctness and quality assurance through static analysis, code review, automated testing, and continuous integration. This vacancy is for experienced software engineers and will require skills and experience in several of the areas listed as well as the ability to lead technical projects. Work Benefits Promotions are based on technical excellence and reviewed regularly. 25 days holiday per year (with bank holidays on top), option to buy up to 5 days per year. Level up with an extra day of holiday per year, up to an extra 5 days, starting from 2 years' service. We offer financial support to cover HMRC allowable costs of relocating if you're moving to the area. Training and development opportunities to support your career aspirations O'Reilly books subscription which provides access to huge range of technical books Regular events including internal technical conferences, company socials and pizza-fuelled lunchtime seminars. Free seasonal fruit, tea, coffee, milk, squash and hot chocolate. Health Benefits - Private medical including access to Private online GP, and a helpline to speak with various healthcare professionals. Physiotherapists, osteopaths or chiropractors for muscle, bone, and joint pain. Mental health - counselling, and specialist consultations and treatment with psychologists and cognitive behavioural therapists. Annual Health assessment. Financial Benefits A company bonus scheme so that everybody is rewarded for company success. This is an annual award that is based on the company hitting its targeted forecast. We have achieved this every year to date. 8% company contribution to pension with no minimum requirement for employee contribution. Death in Service cover of 4x base salary. Lifestyle Benefits Enhanced maternity/paternity/adoption leave: 12 weeks maternity leave at full pay as soon as you join, further enhanced to 20 weeks full pay from 2 years' service. 2 weeks paternity leave at full pay as soon as you join, further enhanced to 4 weeks full pay from 2 years' service. Enhanced cycle-to-work scheme including the ability to purchase a bike over £1,000 (e-bikes, specialist cycles and trikes allowed). TPBN1_UKTJ

Our Capability Development team develops bespoke software for our clients in the Cyber Security domain. We may be building assured software that prioritises engineering rigour and reliability, rapid solutions that bring together existing tooling for high-impact results, or blended operational systems that address real-world challenges in the field. Common to all is a commitment to technically led decisions, meaningful technical challenge, and engaging career paths where your work makes it off the shelf and into the hands of our customers. Across our projects, we work with a range of platforms, languages and delivery environments. This may include web applications, native applications, automation, data processing, integration work, mobile platforms, Linux systems, cloud or on-premise deployments, and specialist operational environments. We are interested in engineers who are comfortable adapting to different technical contexts and choosing appropriate tools for the problem at hand. This role is aimed at software engineers with experience delivering software projects using interpreted languages and modern development practices. You may have worked with languages such as Python, Rust, JavaScript, C++, TypeScript, Go or similar, alongside experience building user-facing systems, APIs, services, native applications or tooling. We are less concerned with a fixed technology stack and more interested in strong engineering fundamentals, practical problem solving, and the ability to deliver useful, maintainable software. We are led by engineers and empowered to optimise our lightweight development processes with the knowledge gained from each project. We value people who take ownership, communicate clearly, work well in small teams, and enjoy seeing software make a. We are ideally looking for a candidate who holds an active Security Clearance to join our team, however, we will consider sponsoring new clearances for candidates that meet our technical requirements. As part of our team, you may be: • Designing and developing new software products, tools or capabilities from early concept through to delivery., • Adding new features to, improving, or replacing components within existing systems., • Building prototypes to explore technical options, validate ideas and help shape project direction., • Developing web, native, service‑side or automation‑focused software depending on project need., • Integrating applications, APIs, third‑party tools or internal systems to deliver practical outcomes., • Working with colleagues and customers to understand requirements and turn them into reliable software. For this role, you will be hands‑on in the day‑to‑day delivery of projects. Typically, this will see you working with one or two other colleagues at a time, taking responsibility for implementation decisions while contributing to wider project planning and delivery. You will help maintain high engineering standards through clear design, readable code, testing, review and pragmatic technical decision‑making. You may also support junior colleagues by sharing knowledge, encouraging good development practices, and helping the team balance quality, maintainability and realistic delivery timescales. • Professional experience delivering software projects using interpreted or high‑level languages., • Experience building web applications, APIs, services, automation, native applications or internal tools., • Comfortable working across different parts of a system, from user interfaces to back‑end services, integration points and deployment environments., • Ability to understand requirements, make sensible technical decisions and deliver maintainable software., • Experience working with existing codebases, including debugging, refactoring and adding new functionality., • Familiarity with modern software engineering practices such as code review, automated testing, continuous integration and version control., • Comfortable learning unfamiliar technologies, libraries or platforms when required by a project., • Strong problem‑solving skills and the ability to work effectively in small, technically focused teams., • Clear communication skills, including the ability to explain technical decisions and collaborate with colleagues or customers. This vacancy is for experienced software engineers who enjoy delivering practical, maintainable software across a range of technologies and project types. It is well suited to engineers who are adaptable, delivery‑focused, and comfortable working across both web and native development environments. • Promotions are based on technical excellence and reviewed regularly., • 25 days holiday per year (with bank holidays on top), option to buy up to 5 days per year., • Level up with an extra day of holiday per year, up to an extra 5 days, starting from 2 years' service., • We offer financial support to cover HMRC allowable costs of relocating if you’re moving to the area., • Training and development opportunities to support your career aspirations., • O'Reilly books subscription which provides access to a huge range of technical books., • Regular events including internal technical conferences, company socials and pizza‑fuelled lunchtime seminars., • Free seasonal fruit, tea, coffee, milk, squash and hot chocolate., • Private online GP, and a helpline to speak with various healthcare professionals., • Physiotherapists, osteopaths or chiropractors for muscle, bone, and joint pain., • Mental health – counselling, and specialist consultations and treatment with psychologists and cognitive behavioural therapists., • Annual health assessment., • A company bonus scheme so that everybody is rewarded for company success. This is an annual award that is based on the company hitting its targeted forecast. We have achieved this every year to date., • 8% company contribution to pension with no minimum requirement for employee contribution., • Death in Service cover of 4x base salary., • Enhanced maternity/paternity/adoption leave: 12 weeks maternity leave at full pay as soon as you join, further enhanced to 20 weeks full pay from 2 years’ service. 2 weeks paternity leave at full pay as soon as you join, further enhanced to 4 weeks full pay from 2 years’ service., • Enhanced cycle‑to‑work scheme including the ability to purchase a bike over £1,000 (e‑bikes, specialist cycles and trikes allowed). We are recruiting staff at all levels in this team, and are able to support market‑leading salaries for every grade within our sector/location. We reward staff based on technical excellence and not years of experience, so it's important to us to speak with you to see which grade you would fit into – it's not always obvious from a CV! Your interviewer will spend time during your first interview speaking with you about how your skills and experience map against our grades, and discuss a salary band so that you know early what you can expect if you receive an offer from us. The technical interview will provide a deeper assessment of your skills against your mapped grade which ultimately determines whether you receive an offer and the exact salary. We are based in the centre of Cheltenham in a stunning new build contemporary office, 5 minutes walk from the local shops and cafes. Our interview process is quick and to the point: if you look like a good fit for the role, we'll schedule a brief call to discuss it in more detail and answer any questions you may have. If that goes well, we'll arrange a technical interview to understand your level of experience. We aim to get back to you with an answer within a couple of days of the technical interview. If you’re looking for a challenging role where you can make a real impact in the world, in a friendly environment and with all the support to advance your career, click apply. #J-18808-Ljbffr

Our client is a cyber security company. Our Software Engineering team develops bespoke capabilities for clients in the Cyber Security domain. We may be building assured products that prioritise engineering rigour and reliability, rapid solutions that bring together existing tooling for high-impact results, or blended operational systems that combine software, hardware, networks and third-party technologies to address real-world challenges in the field. Common to all is a commitment to technically led decisions, meaningful technical challenge, and seeing our work make it off the shelf and into the hands of our customers. We're looking for Integration and Test Engineers who enjoy the point where design, software, hardware and networks meet. Rather than concentrating on developing a single component, you will be responsible for bringing components together into complete working systems, understanding why they do — or occasionally don't — behave as expected, and producing the evidence needed to demonstrate that the resulting capability works in representative and operational environments. Our systems may combine bespoke applications, Linux or Android devices, networks, infrastructure, commercial products, open-source tooling, specialist hardware and communications equipment. You should enjoy getting hands-on with unfamiliar technologies, understanding their interfaces and constraints, automating away repetitive work, and methodically isolating problems that span several components. This role sits between systems engineering and software engineering. You are likely to write Python or Bash, build test tooling, configure networks, automate deployments and investigate source code, but bespoke application development is not the primary objective. Your focus is making the complete system work reliably . We're led by engineers and empowered to optimise our lightweight engineering processes with the knowledge gained from each project. We want repeatable integration and test where it provides value, while retaining the ability to move quickly when developing new capabilities. We are ideally looking for candidates who hold an active Security Clearance to join our team; however, we will consider sponsoring new clearances for candidates who meet our technical requirements. Key Responsibilties As part of our team, you may be: Bringing together software, hardware, networks, infrastructure and third-party technologies into complete working systems. Developing integration approaches, representative test environments, deployment automation and supporting tooling. Designing and executing system-level tests covering functional behaviour, performance, resilience and failure handling. Investigating complex failures across software, operating systems, networks, configuration and hardware and working with engineers to resolve root causes. Supporting demonstrations, trials, deployments and customer acceptance while feeding integration findings back into system design and interfaces. For this role you will be hands-on in the day-to-day delivery of projects. Typically, this will see you working closely with a small number of engineers and taking ownership of getting a complete capability from individually working components to a dependable integrated system. Desirable Skills Successful candidates will have strong experience in a subsection of the following areas: Hands-on experience integrating and troubleshooting complex systems involving multiple technologies or components. Strong Linux, scripting and automation skills using technologies such as Python, Bash or similar. Good networking fundamentals and experience diagnosing networked systems using logging, packet capture or protocol-analysis tools. Experience with integration or system testing, test automation, CI/CD, containers, virtualisation or configuration-management tooling. Strong fault-isolation and root-cause analysis skills, with confidence working across software, hardware, infrastructure and third-party components. Experience with Android, embedded Linux, specialist hardware, RF, telecommunications systems or operational deployment environments would be useful for some of our projects, but not essential. You don't need to be an expert developer, network engineer and hardware engineer simultaneously. We are looking for technically curious engineers with strong fundamentals who are comfortable crossing those boundaries when solving a problem. This vacancy is for experienced engineers who get satisfaction from taking a collection of individually capable technologies and turning them into a reliable, repeatable, tested system that works outside the lab. Work Benefits Promotions are based on technical excellence and reviewed regularly. 25 days holiday per year (with bank holidays on top), option to buy up to 5 days per year. Level up with an extra day of holiday per year, up to an extra 5 days, starting from 2 years' service. We offer financial support to cover HMRC allowable costs of relocating if you're moving to the area. Training and development opportunities to support your career aspirations O'Reilly books subscription which provides access to huge range of technical books Regular events including internal technical conferences, company socials and pizza-fuelled lunchtime seminars. Free seasonal fruit, tea, coffee, milk, squash and hot chocolate. Health Benefits - Private medical including access to Private online GP, and a helpline to speak with various healthcare professionals. Physiotherapists, osteopaths or chiropractors for muscle, bone, and joint pain. Mental health - counselling, and specialist consultations and treatment with psychologists and cognitive behavioural therapists. Annual Health assessment. Financial Benefits A company bonus scheme so that everybody is rewarded for company success. This is an annual award that is based on the company hitting its targeted forecast. We have achieved this every year to date. 8% company contribution to pension with no minimum requirement for employee contribution. Death in Service cover of 4x base salary. Lifestyle Benefits Enhanced maternity/paternity/adoption leave: 12 weeks maternity leave at full pay as soon as you join, further enhanced to 20 weeks full pay from 2 years' service. 2 weeks paternity leave at full pay as soon as you join, further enhanced to 4 weeks full pay from 2 years' service. Enhanced cycle-to-work scheme including the ability to purchase a bike over £1,000 (e-bikes, specialist cycles and trikes allowed). TPBN1_UKTJ

Salary: £61,000 - 101,000 per year • We are looking for experienced candidates with a demonstrable background in exploit development., • You should have commercial experience and have worked in the industry already., • You should bring a passion for solving difficult and complex problems., • You should be able to thrive in highly technical and challenging environments., • You should be well versed in the most recent advancements in the domain., • You should have strong knowledge of vulnerability research., • You should have reverse engineering knowledge in IDA Pro or Ghidra., • You should have substantial knowledge of exploitation techniques and mitigations., • You should have strong C/C++/Assembly development experience., • You should have in-depth knowledge of one or more of ARM, AARCH64, x86, x64, and MIPS., • You should have experience and knowledge of Linux and its internals., • You should have experience and knowledge of Android or iOS and its internals., • You should have experience documenting and presenting complex technical findings clearly and concisely., • You must hold active DV clearance., • Develop capability and exploits across a variety of architectures., • Analyse and defeat existing and future mitigation techniques., • Reverse engineer binaries., • Design and productise solutions with immediate real-world impact., • Grow the teams capabilities by developing novel tools and strategies., • Work in tandem with other talented developers and engineers., • Collaborate closely with vulnerability researchers to ensure the impact of complex, low-level vulnerabilities is fully realised., • ARM, • Android, • Support, • Linux, • Security, • iOS, • C++ We are partnering directly with CoreTech Security to hire for this role. As an Exploit Developer, you will join a world-class team of developers and researchers focused on delivering bespoke products and research to some of the most interesting cyber security clients in the UK. Our team is highly experienced, deeply technical, and blends rapid prototyping, security research, and software engineering skills to deliver innovative solutions that support our clients operational needs. We offer promotions based on technical excellence and reviewed regularly, 25 days of holiday plus bank holidays, the option to buy up to 5 additional days per year, and extra holiday allowance starting from 2 years service. We also provide relocation financial support, training and development opportunities, an OReilly books subscription, regular internal events and socials, and free seasonal fruit, tea, coffee, milk, squash, and hot chocolate. Our health benefits include private medical cover, access to a private online GP, specialist support for physical and mental health, and an annual health assessment. Financial benefits include a bonus scheme, an 8% company pension contribution with no minimum employee contribution, and death in service cover of 4x base salary. Lifestyle benefits include enhanced maternity, paternity, and adoption leave, and an enhanced cycle-to-work scheme. last updated 40 week of 2026 #J-18808-Ljbffr