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Senior Android Engineer (Contract) | Kotlin, Jetpack Compose, Coroutines, Flow | High-Traffic Consumer App | £400/day | Remote (UK) | Outside IR35 We’re hiring a Senior Android Engineer (contractor) to join a product-focused team building a high-traffic consumer application used at scale. This is a hands-on role in a modern Android environment — ideal for engineers who care about clean architecture, performance, and shipping high-quality features without unnecessary process. The Role You’ll take ownership of feature delivery end-to-end — from shaping solutions with product through to production release. You’ll be: • Building and shipping features in a large-scale Android app used by thousands/millions of users, • Working closely with product and design to make pragmatic technical decisions, • Writing clean, maintainable Kotlin code in a modern architecture, • Contributing to architectural direction (not just implementing tickets), • Improving performance, reliability, and overall app quality, • Reviewing code and raising the bar across the team, • Mentoring mid-level engineers where needed Tech Environment • Kotlin-first codebase, • Jetpack Compose for modern UI (with some legacy Views in places), • Coroutines + Flow for async and state management, • MVVM / Clean Architecture, • Dependency Injection (Hilt or Dagger), • Modularised codebase Testing & DevEx: • Unit testing (JUnit, MockK/Mockito), • UI testing (Espresso / Compose testing), • Screenshot testing (e.g. Paparazzi or similar) as part of CI to ensure UI consistency, • CI/CD pipelines (e.g. CircleCI, Bitrise, GitHub Actions), • Gradle-based build system What We’re Looking For • Strong commercial experience building native Android apps in Kotlin, • Experience working on production apps at scale, • Confidence with modern Android stack (Compose, Coroutines, Flow), • Experience with automated testing, including screenshot/UI validation approaches, • Solid understanding of architecture and code quality (SOLID, clean architecture), • Comfortable owning features and making technical decisions, • Able to communicate clearly with engineers and non-engineers Nice to Have • Hands-on experience with Paparazzi or other screenshot testing frameworks, • Experience migrating from Views → Compose, • Experience optimising app performance (startup time, rendering), • Exposure to real-time features (live updates, notifications, streaming data), • Experience working alongside cross-platform teams (e.g. React Native) Why This Role Is Worth Your Time • £400/day, Outside IR35, • Fully remote (candidates must be UK-based), • High-traffic, real-world product — not a throwaway rebuild, • Modern Android stack (not stuck in legacy), • Engineers have real influence over technical decisions, • Strong testing culture (including UI/screenshot validation), • Collaborative, product-led team (low bureaucracy, high ownership), • Clear 6-month scope with strong likelihood of extension

• Role: Robotics Software Engineer, • Location: Remote, • Employment Type: Full-time Compensation: Competitive salary commensurate with experience, qualifications, and location. Indicative range: $115,000 – $185,000 (USD equivalent), plus benefits. Role Overview We are hiring a Robotics Software Engineer to build the software that runs autonomous and semi-autonomous robotic systems. The role combines deep robotics expertise with strong software engineering — shipping code that has to work in the physical world. Key Responsibilities • Design and implement perception, planning, and control software for robotic systems, • Build and integrate ROS / ROS2 nodes and middleware, • Develop simulation environments for testing and validation, • Diagnose and resolve issues across hardware, sensors, and software stack, • Contribute to architecture decisions across the robotics stack, • Partner with hardware, ML, and product teams on system design Required Skills and Qualifications • 3+ years in robotics software engineering, • Strong proficiency in C++ and Python, • Hands-on experience with ROS / ROS2, • Working knowledge of perception, SLAM, motion planning, or control, • Experience with simulation tools (Gazebo, Isaac Sim, MuJoCo) is a plus, • Solid software engineering fundamentals What You'll Bring • Curiosity to dig into systems and turn findings into shipped improvements, • Strong written communication and ability to explain technical decisions, • A test-and-learn mindset; you ship fast, measure, and iterate, • Comfort working asynchronously across time zones What We Offer • Fully remote, flexible work hours, • Performance-based bonus structure, • Annual learning & development stipend, • Health and wellness benefits (varies by location), • Opportunity to work on high-scale, real-world impact projects Equal Opportunity Statement This is an equal opportunity role. Applications are welcomed from all qualified individuals regardless of race, color, ethnicity, nationality, gender, gender identity or expression, sexual orientation, age, religion, disability, marital status, or any other characteristic protected by applicable law. All hiring decisions are based solely on qualifications, skills, and demonstrated ability.

Role: Electronics Software Engineer Location: Oldham Salary: Up to £50,000 + Benefits KO2's client, a global leader in advanced security technologies, is continuing its growth and is seeking an Electronics Software Engineer to support the development of world-class protection systems deployed in some of the most secure environments worldwide. Our client is a highly respected name within the high-security systems sector, generating over £50 million in annual turnover. They are recognised globally for their expertise in drone defence, blast mitigation, and perimeter protection. Despite their international footprint, they retain a supportive, family-oriented culture where engineers are encouraged to collaborate, innovate, and grow. You'll be part of a close-knit engineering team where your contributions are genuinely valued. The Role As an Electronics Software Engineer, you will work across both hardware and embedded software, playing a key role in the design, development, testing, and integration of mission-critical security systems. You'll collaborate closely with mechanical and systems engineers to deliver robust, field-tested solutions designed to operate in some of the most demanding conditions. Key Responsibilities Design and develop analogue and digital electronic circuits Develop embedded software, balancing time between hardware and firmware design Program and manage microcontrollers for I/O control and system integration Support and participate in high-security testing, including blast and ballistic validation Work cross-functionally to deliver fully integrated security systems Contribute to team development through mentoring and knowledge sharingWhat You'll Bring Strong experience in analogue and digital electronics design Proven embedded software development experience (C/C++ preferred) Hands-on experience with microcontrollers and system integration British passport (required for security clearance) A passion for developing innovative, high-reliability systems in low-volume environmentsWhat's on Offer Competitive Salary: Up to £50,000 per annum Training & Development: Access to specialist training to expand your expertise Career Progression: Opportunities to grow within a rapidly expanding electronics team, including leadership pathways Supportive Culture: A family-oriented environment where engineers are supported and valuedThis is an outstanding opportunity for an Electronics Software Engineer with embedded experience to work on truly innovative, high-impact security technologies. If you're looking to apply your skills to world-class engineering challenges with real global significance, this role offers both technical depth and long-term career growth

Role: Electronics & Embedded Software Engineer Location: Oldham Salary: Up to £50,000 + Benefits KO2's client - an innovator in IoT-connected devices and smart systems - is expanding their engineering team and is seeking a skilled engineer to help design and deliver next-generation connected products deployed across commercial and industrial environments worldwide. This is an exciting opportunity to work on cutting-edge IoT solutions that combine electronics, embedded software, connectivity, and mechanical design to enable intelligent, data-driven products used in real-world applications. About the Company Our client is a well-established name in the IoT and connected technology sector, with a strong reputation for delivering reliable, scalable smart devices. Their product portfolio spans sensor-driven systems, connected hardware platforms, and intelligent edge devices. Despite their global footprint, they maintain a family-oriented, collaborative culture, where engineers are genuinely valued and supported. You'll be part of a close-knit, highly capable engineering team where innovation, ownership, and continuous improvement are encouraged. The Role As an Electronics & Embedded Software Engineer, you'll work across both hardware and firmware, contributing to the design, development, testing, and integration of IoT-enabled products. You'll collaborate closely with mechanical, systems, and software teams to deliver robust, connected devices designed for reliability, scalability, and real-world deployment. Key Responsibilities Design and develop analogue and digital electronic circuits for connected devices Develop embedded software and firmware (splitting time between hardware and code) Program and manage microcontrollers for I/O, sensing, and connectivity Support system integration, testing, and validation of IoT devices Work with cross-functional teams to deliver complete, end-to-end connected solutions Contribute to team growth through collaboration and mentoringWhat You'll Bring Strong experience in analogue and digital circuit design Proven embedded software development skills (C programming) Hands-on experience with microcontrollers and hardware integration Experience or interest in IoT, connected products, or smart devices Passion for working on low-volume, high-quality products where reliability and innovation matterWhat the Company Offers Competitive Salary: Up to £50,000 per annum Training & Development: Access to specialist training in embedded systems and IoT technologies Career Progression: Join a growing electronics team with clear pathways into senior or leadership roles Supportive Culture: A family-oriented environment where engineers are trusted and valued High-Impact Products: Work on innovative IoT-connected devices used in real-world applicationsIf you're an experienced Electronics Engineer with embedded software expertise and a passion for building connected, intelligent devices, this is a fantastic opportunity to join a forward-thinking IoT business working on genuinely impactful technology

Expleo are recruiting for a Connected Car Validation Engineer to support our global automotive client, based in Bedfordshire, in their vision to deliver the most distinct and innovative range of road vehicles, all equipped with state-of-the-art technology, for a contract opportunity. Responsibilitie

As a Thermatic Technical Service/Validation Engineer you will be responsible for delivering critical ventilation validation and Verifications to HTM 03-01 and other relevant British Standards. We are looking for a Ventilation Service/Validation Engineer to join the Critical Environments team at Ther

Due to growth, they are now looking to recruit a Validation Engineer to join their team. Generation of Validation Protocols for a full validation life cycle. Understanding of cGMP Clean Rooms, cGMP related utilities maintenance, cGMP equipment engineering & maintenance, Validation, and warehousing f

Lead Engineer – Verification & Validation Capability. This work spans not only nuclear engineering but also the broader range of engineering and operational disciplines required to deliver a major infrastructure project. Typically a degree in an engineering discipline or equivalent experience alon

Our deep domain expertise and engineering solution portfolio covers the complete product development lifecycle from concept evaluation to manufacturing support and certification for the Aerospace, Defence, Heavy Engineering, Automotive, Medical Devices & Industrial Product industries. AXISCADES is a

We are seeking a highly skilled Senior Validation Engineer to join our growing team and play a critical role in validating complex systems within the telecommunications and satellite domains. Experienced Technology and Engineering Recruiter | 🚀 Connecting the best and brightest talent across the

We are looking for a dynamic individual to fill various roles in our Validation Engineers team, responsible for test execution for both automated and manual using HIL test environment for various Software releases. Platform validation for CHCM2 EVA25 vehicle programmes. Tracking and documenting the

As a Component‑Level Test & Validation Engineer, you will be responsible for validating individual HV powertrain and charging components to ensure functionality, durability, performance, and compliance. Plan and execute component‑level test and validation for HV powertrain and charging component

A leading electronics company in the UK seeks a Silicon Validation Engineer to evaluate PMICs through bench validation techniques. The role requires a Bachelor's degree in Electrical Engineering or Computer Science, and knowledge of lab instruments.

A mid-sized engineering solutions company in the United Kingdom is looking for an Interim Test Engineer to support validation programs for electronic components. The role involves preparing validation plans, executing complex tests, and conducting root cause analysis.

A recruitment agency is looking for an experienced Test Engineer to join an engineering team in the UK. Candidates should have a degree in Electronic Engineering, experience in PCB design, and proficiency in tools like VISA API and C++.

Candidates should have expertise in verification and validation, strong systems engineering knowledge, and a degree in engineering. A pioneering nuclear technology organization is seeking a Lead Engineer for V&V Process Development.

Tact is seeking an experienced ML Data/Ops Engineer for a contract focusing on quality and validation of models.

The successful candidate will coordinate engineering disciplines and deliver projects from design to validation within regulated environments. They will need a degree in Controls Engineering, at least 5 years of relevant experience, and strong project management skills. A leading technology firm in

Senior System Validation Engineer. Lead system validation activities across PHY, hardware, and software. MSc or BSc in Electrical Engineering.

Degree, HND, HNC or equivalent experience in Systems Engineering, Software Engineering, Control Systems Engineering or similar field. Principal Systems Verification & Validation Engineer. Principal Verification & Validation Engineer.

An innovative electronics company in the UK is seeking a collaborator to evaluate PMICs through silicon validation techniques. Candidates should have a Bachelor's in Electrical Engineering or Computer Science and strong skills in debugging and Python programming.

Senior System Validation Engineer – SerDes Focus. We are seeking a Senior System Validation Engineer with a strong emphasis on. Build and maintain test setups supporting both automated regression and manual validation.

This position focuses on reliability and validation testing to support engineering projects. WhiteCrow Research is seeking a Senior Reliability & Testing Engineer in Mexico City. Candidates should have 3–6 years of experience in testing or engineering project support, a solid understanding of test

A global space technology start-up in the UK is looking for a SATCOM Validation Engineer to engage in validation efforts for satellite communication systems. This role requires a Bachelor's or Master's degree in Engineering, Telecom, or Computer Science, along with experience in system validation wi

A leading defense technology firm is seeking a Software Test Engineer to join their Integration & Systems Validation team in the United Kingdom. The ideal candidate will oversee software testing and validation, working across the product lifecycle from concept to customer trials.

Experience with one or more of the following (desirable): + ISO15288 Systems and Software Engineering + IAEA SSG-69 Equipment Qualification for Nuclear Installations + EPRI Nuclear Power Plant Equipment Qualification Reference Manual + Environmental, Safety, Security & Safeguarding (E3S) princip

System Integration & Validation Engineer. We are looking for a System Integration & Validation Engineer to lead innovation in our next generation space Comm technology. Work closely within a multi-disciplinary team to lead high-impact technical decisions about system design, implementation, and vali

TATA ELXSI is seeking a dynamic individual to join their Validation Engineers team in the United Kingdom. Responsibilities include platform validation for vehicle programs, automation test script creation, and managing test cases in JIRA XRAY. Applicants should have a Bachelor's degree or equivalent

A pioneering space technology company in the United Kingdom is seeking a System Integration & Validation Engineer to lead innovation in space communication technology. Responsibilities include managing validation activities and collaborating with multi-disciplinary teams to ensure high-quality resul

A leading technology solutions provider is seeking a skilled SoC Functional Validation Engineer to remotely join their team in the UK. The role involves performing functional validation and bring-up of next-generation SoC platforms with high-end ARM processors. Candidates should have strong experien

We are looking for a Software Integration & Validation Engineer to lead innovation in our next generation space Comm technology. Take part in outbound integration and validation activities with subcontractors, partners, and customers. Work closely within a multi-disciplinary team to lead high-impact

Expleo Group UK Jobs seeks a CFD Engineer to support fluid dynamics through computer modeling techniques in Warwickshire. The role involves managing simulation models, supporting Lead Engineers, and resolving technical issues.

Job Name- SoC Functional Validation Engineer. We are seeking a highly skilled SoC Functional Validation Engineerto join our team. Swedium Global is the growing System Engineering and Solution Company, offers services like Semiconductor Engineering R&D Services, Embedded Systems Development, Custom A

The Validation Lead partners closely with Product, Engineering, and Quality Management teams to drive validation best practices throughout the software development lifecycle (SDLC), ensuring traceable, audit ready deliverables that meet customer and regulatory expectations. Author, review, and appro

This challenging role requires an engineer experienced in system testing, validation / verification engineering. As the V&V Engineer with a luxury vehicle manufacturer you will contribute to the coordination and delivery of dynamic and static vehicle validation events. Proven experience in system te

A research and consultancy firm is looking for a Process Validation professional to support their thermal processing clients through consultancy, training, and research activities. Responsibilities include managing scientific projects, consultancy services, and developing engineering solutions.

You will work alongside experienced Engineers on commercial projects, assisting with physical commissioning/validation activities while developing strong technical, communication, and health & safety skills. Assist Senior Engineers with HVAC Commissioning and Validation activities. Mechanical Valida

EDAG UK is seeking an Integration-Level Test & Validation Engineer in Greater London. The ideal candidate will have at least 5 years in a similar role, an engineering degree, and experience with HV systems.

A specialist employment agency is seeking a V&V Engineer with proven experience in system testing and validation for a luxury vehicle manufacturer. The role involves coordinating vehicle validation events, requiring hands-on knowledge of dynamic and static testing.

A leading engineering firm in the United Kingdom is seeking a qualified professional with a strong background in mechanical engineering and OCTG products. The role involves developing and testing connections while providing technical advice and executing validation tests in high-pressure environment

One of our top Engineering Clients is looking for a Validation Engineer (Protection & Control) to join their team in Stafford on a 6 month+ contract basis. We actively recruit at all levels and this is a superb opportunity for a Validation Engineer looking for new employment. The Engineer for Grid A

We are seeking a talented Staff Validation Engineer to join our fast-paced R&D team, driving the evaluation and testing of new products. Assist in designing validation solutions for new products, including software, hardware, and documentation. Collaborate with designers, product, test, and applicat

A leading engineering solutions company in the UK is seeking a skilled professional to validate and test SecOC and IPsec products.

EDAG UK is seeking a Component-Level Test & Validation Engineer to validate HV powertrain and charging components. The role requires a degree in engineering, 5+ years of relevant experience, and familiarity with HV systems, supporting a hybrid work environment with benefits including health cash pla

Recursion is seeking a Data Platform Engineer to join its London office.

Site Service Engineer - UCV/Validation & LEV Engineer. Complete annual inspection and re-verification testing and re-validation of Healthcare critical ventilation plant to HTM/HBN Guidance.