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Location: Sheffield, UK (Hybrid).Job type: Contract - Inside IR35.Python developer responsible for building scalable automation solutions to streamline database operations.Hands on experience with API development using Python and FastAPI.Strong problem-solving, debugging, and analytical skills.Desig

The Opportunity ProCheckUp, an elite independent cybersecurity consultancy serving FTSE 100 corporations, UK government authorities, and international financial institutions, is seeking an experienced Penetration Tester with SC Clearance to join our expanding remote team. This is an exceptional opportunity to conduct high-impact security assessments across diverse enterprise environments while maintaining work-life balance through flexible remote working. You'll contribute to ProCheckUp's ambitious expansion phase, working alongside industry-leading security professionals on mission-critical infrastructure, applications, and network security testing for the UK's most security-conscious organizations. What You'll Do Core Responsibilities: • Conduct advanced penetration testing across network infrastructure, web applications, and mobile platforms for enterprise clients, • Perform vulnerability assessments, threat modelling, and risk analysis across diverse technical environments, • Execute social engineering assessments and physical security testing, • Produce detailed scoping documents and executive-level penetration testing reports aligned with CREST and NCSC standards, • Lead incident response investigations and digital forensic analysis when required, • Work independently on client-facing assessments whilst collaborating with senior consultants and team leaders, • SCADA/OT environment security testing, • Cloud infrastructure penetration testing (AWS, Azure), • Web services and API security, • Mobile application testing (iOS/Android) Who You Are Essential Experience & Skills: • Minimum 3+ years professional penetration testing experience, • Demonstrable expertise in network, application, and infrastructure security testing, • Strong hands-on proficiency with penetration testing frameworks, exploitation techniques, and security tools (Metasploit, Burp Suite, Wireshark, custom tools), • Deep technical knowledge of Windows, Linux, Unix operating systems and TCP/IP networking protocols, • Proven ability to perform source code reviews and application security analysis, • Advanced understanding of web application vulnerabilities (OWASP Top 10) and mitigation strategies, • Excellent report writing and executive communication skills—ability to translate technical findings into business risk, • Ability to work autonomously and adapt to client-specific environments, • CREST/CyberScheme CCTM/CSTM CCT/CSTL-INF or CCT/CSTL-APP (current), • NCSC CHECK Team Leader (CTL) (current) or CHECK Team Member (CTM) (current) preferred but not essential, • CEH Advanced (AECH) or OSCP, • SANS GCIH, GPEN, or GWAPT, • EnCase Certified Examiner (EnCE), • CWSP (Certified Wireless Security Professional), • Published security research, CVE disclosures, or white papers, • Curiosity and passion for emerging security threats and attack methodologies, • Drive to mentor junior consultants and contribute to technical innovation, • Professional demeanour with excellent client-facing communication, • Attention to detail in all deliverables, particularly technical reports and evidence documentation Why ProCheckUp? ✓ Proven Track Record: 25+ years delivering security services to world-leading organisations; holders of NCSC CHECK, CREST, PCI QSA, and PCI ASV accreditation's ✓ Prestigious Client Base: Work directly with FTSE 100 companies, UK government bodies, international law firms, and critical infrastructure operators ✓ Technical Leadership: Collaborate with industry experts who publish research, present at major conferences, and drive the cybersecurity industry forward ✓ Flexibility & Autonomy: Remote-first working with complete location flexibility across the UK—work from home, co-working spaces, or client sites as you prefer ✓ Career Progression: Clear advancement pathway from Consultant → Senior Consultant → Team Leader → Technical Director; investment in advanced certifications and professional development ✓ Competitive Remuneration: Market-leading salary package (£65,000–£85,000+ depending on experience and certifications) plus comprehensive benefits ✓ Backing of a Stable, Well-Funded Firm: Work for an independent, profitable, growth-focused security consultancy—not a commodity testing mill ✓ Continuous Learning: Access to research funding, certification sponsorship, conference attendance, and exposure to cutting-edge threat landscapes The Application Process This is a carefully selected search—we're looking for genuine penetration testing professionals with the technical depth to advise enterprise clients, not script-runner-test shops. To Apply: • Submit your CV (including certifications, security clearance status, and estimated clearance renewal date), • Write a brief covering letter (150–250 words) addressing:, • Why ProCheckUp's mission and client base appeal to you, • Your remote working setup and availability (notice period, start date), • Screening call with HR (15 mins): Verify background, clearance status, and role fit, • Technical interview with Senior Consultant (45 mins): Deep-dive on penetration testing methodology, recent case studies, and security trends, • Final interview with Hiring Manager/Technical Director (30 mins): Culture fit, growth ambition, and team dynamics Logistics | Position Type | Full-Time, Permanent | | Location | Remote, United Kingdom | | Security Clearance | SC (Minimum) | | Working Arrangements | Flexible remote; occasional travel for client engagements | | Salary | £65,000–£95,000+ based on experience, certifications, and client-facing impact | | Benefits Package | Competitive pension, health insurance, professional development budget, | | Notice Period | 2-8 weeks preferred; negotiable for exceptional candidates | About ProCheckUp Founded in 1999, ProCheckUp has evolved from a specialist penetration testing firm into a multi-disciplinary cybersecurity consultancy trusted by the world's most security-conscious organizations. Our team of CHECK Team Leaders, CREST Certified Testers, and forensic specialists delivers: • Penetration Testing & Security Audits: Infrastructure, application, and mobile assessments, • Compliance Advisory: PCI DSS, GDPR, ISO27001 implementations and certifications, • Incident Response & Forensics: 24/7 emergency response and digital evidence analysis Equal Opportunities ProCheckUp is an equal opportunities employer. We celebrate diversity and are committed to building an inclusive environment for all employees, regardless of gender, race, ethnicity, religion, disability, age, sexual orientation, or gender identity. We encourage applications from underrepresented groups in cybersecurity. Security Vetting: All successful candidates will be subject to UK security vetting procedures. Applicants must have resided in the UK for the last 5+ years to be eligible for SC clearance (or provide documented reasons for absence). Previous security clearance experience is valued but not essential. *

🚀 Global brand hiring: Senior AWS / Full Stack Engineer - 12 month contract - Remote/UK based🚀 I’m looking to connect with experienced engineers who thrive in cloud-native environments and enjoy building scalable, data-driven applications. 🔧 What we’re looking for: • 5+ years working with AWS services including Aurora, Postgres, Redshift, S3, DynamoDB, CloudFront, SES, API Gateway, Step Functions, EventBridge, and SAM/CloudFormation, • Strong SQL programming expertise, • Experience with NestJS and modern front-end development (JavaScript, HTML, CSS), • Familiarity with GitLab (or similar) and CI/CD workflows, • Proven track record optimizing data storage, retrieval, performance, and cost efficiency, • Experience integrating data from APIs, databases, and streaming platforms into centralized systems (data lakes / warehouses), • Hands-on experience with serverless architectures, DevOps practices, containers, and cloud security 🔐 Bonus points for: • Advanced knowledge of data security best practices (encryption, IAM, access controls), • Strong collaboration skills across engineering, product, and business teams, • Solid understanding of SDLC, testing, and cloud-based delivery 💡 This role is ideal for someone who enjoys solving complex problems, working with modern cloud architectures, and contributing to high-impact systems. 📩 Interested or know someone who might be a great fit? Drop me an email with your CV to or comment below!

Aveni is redefining how financial institutions use AI. We build real, production-ready agentic systems that reshape how banks, advisers and financial services firms operate, replacing fragmented processes with intelligent, end-to-end workflows. We have been recognised as Fintech of the Year for two consecutive years and awarded Best Specialist Technology Service at the Professional Adviser Awards 2025. Backed by leading investors including Puma Private Equity, and commercially supported by Lloyds Banking Group and Nationwide Building Society, we previously completed one of Scotland’s largest Series A rounds. Since then, we’ve continued to grow rapidly as adoption of AI in financial services accelerates, and we’re now scaling our team to meet that demand. The Role We’re looking for a Senior AI Engineer (FinLLM / NLP) to help drive the next generation of AI systems powering financial services. This role focuses on developing, fine-tuning and deploying advanced language models that operate at production scale within highly regulated environments. You’ll work alongside our NLP team, software engineers, and product leaders to build cutting-edge solutions that transform how financial organisations use AI. This is a hands-on role where you’ll shape both the technical direction and practical deployment of large language models and NLP systems within our platform. What You’ll Do • Build and optimise LLM-powered systems, • Architect, fine-tune and optimise machine learning models including LLMs and classical ML approaches, • Experiment with modern architectures such as Transformers and Mixture-of-Experts, • Apply efficient training and fine-tuning techniques including LoRA and parameter-efficient methods, • Develop robust evaluation approaches to measure model quality and reliability, • Develop scalable AI systems, • Build and deploy production-grade NLP pipelines and services, • Ensure models operate efficiently with low latency and high availability, • Integrate models into scalable cloud infrastructure and real-world applications, • Data strategy and model training, • Lead the acquisition, processing and governance of large structured and unstructured datasets, • Apply exploratory data analysis and validation techniques to improve training pipelines, • Ensure data privacy and governance standards suitable for financial services, • Engineering best practices, • Contribute to DevOps and MLOps pipelines, • Implement robust version control, testing and CI/CD workflows, • Support reliable deployment and monitoring of models in production environments, • Technical leadership, • Mentor engineers and contribute to the technical growth of the team, • Work closely with product, engineering and data teams to deliver AI solutions, • Stay at the forefront of AI and NLP research, applying new approaches where they add value What We’re Looking For Essential experience • Significant experience building, training and deploying machine learning models, • Strong Python skills with experience using NumPy, Pandas, SciPy and modern ML frameworks such as PyTorch or TensorFlow, • Experience working with large-scale unstructured data, • Experience building and deploying production-ready NLP systems, • Familiarity with API integrations and data acquisition pipelines, • Experience implementing software engineering best practices including Git and agile development, • Experience working with cloud environments (preferably AWS) Nice to have • Experience with containerisation technologies such as Docker or Kubernetes, • Experience with frameworks such as vLLM or NeMo, • Knowledge of financial services NLP applications, • Experience designing evaluation methodologies for LLM outputs, • Experience building intelligent agents or multi-agent systems, • Skills and mindset, • Strong analytical problem-solving skills, • Ability to design scalable, production-ready AI systems, • Clear communication with both technical and non-technical stakeholders, • Passion for AI innovation and continuous learning, • Leadership and mentoring capability Qualifications • MSc or equivalent experience in a relevant field such as AI, Machine Learning, Computer Science, or Data Science Join Us in Making a Difference At Aveni, we believe that diversity drives innovation. We’ve built our business to ensure an inclusive workplace where everyone feels valued and empowered to contribute their best work. If you’re passionate about technology and its ability to drive positive change for the future of financial services, we’d love to hear from you. Even if you don’t meet 100% of requirements, we’d like to hear from you anyway if you believe you’d fit in. Apply now to join us on our mission to transform the financial services industry through AI. Benefits at Aveni What you’ll love: • Remote-first working across the UK, • Work abroad policy, • Co-working spaces available, • 34 days holiday (including flexible bank holidays) and your birthday off, • Company-wide off-sites, • Optional Personal Development Plan, • Flexible benefits platform, • Protection essentials including Life Insurance, Income Protection, Critical Illness cover, and Pension (up to 5% matched employer contribution with optional increased contributions), • Private health and dental care, • Potential share options, • Enhanced family leave

About Us: Based in San Francisco, California, Turing is the world’s leading research accelerator for frontier AI labs and a trusted partner for global enterprises deploying advanced AI systems. Turing supports customers in two ways: first, by accelerating frontier research with high-quality data, advanced training pipelines, plus top AI researchers who specialize in software engineering, logical reasoning, STEM, multilinguality, multimodality, and agents; and second, by applying that expertise to help enterprises transform AI from proof of concept into proprietary intelligence with systems that perform reliably, deliver measurable impact, and drive lasting results on the P&L. Project Overview: As a Software Engineering evaluator, you will create cutting-edge datasets for training, benchmarking, and advancing large language models, collaborating closely with researchers. This includes curating code examples, providing precise solutions, and making corrections in Python, JavaScript (including ReactJS), C/C++, Java, Rust, and Go; evaluating and refining AI-generated code for efficiency, scalability, and reliability; and working with cross-functional teams to enhance enterprise-level AI-driven coding solutions. What Does a Typical Day Look Like? • Working on AI model training initiatives by curating code examples, building solutions, and correcting code in Python, JavaScript (including ReactJS), C/C++, Java, Rust, and Go., • Evaluate and refine AI-generated code to ensure that it is efficient, scalable, and reliable., • Collaborate with cross-functional teams to enhance AI-driven coding solutions against industry performance benchmarks., • Build agents that can verify the quality of the code and identify error patterns., • Hypothesize on steps in the software engineering cycle (prototyping, architecture design, API design, production implementation, launch, experiments, monitoring, operational maintenance) and evaluate model capabilities on them, • Design verification mechanisms that can automatically verify a solution to a software engineering task. Required Skills: • 3+ years of software engineering experience., • Strong expertise in building full-stack applications and deploying scalable, production-grade software using modern languages and tools., • Deep understanding of software architecture, design, development, debugging, and code quality/review assessment., • Excellent oral and written communication skills for clear, structured evaluation rationales. Engagement Details: • Commitment: flexible engagement, minimum 10 hrs/week, up to 40 hrs/week (partial PST overlap required), • Type: Contractor (no medical/paid leave), • Duration: 1 month (starting next week; potential extensions based on performance and fit), • Location: Candidates must be based out of US, Canada or WEU countries (UK, Netherlands, Italy, Germany, …) Note: As part of assessments you will go through an AI video interview. After applying, you will receive an email with a login link. Please use that link to access the portal and complete your profile. Know amazing talent? Refer them at ___, and earn money from your network.

Advanced customization and configuration: Entities, forms, views, dashboards Business rules, workflows, business process flows Strong development experience: C# plugins and custom workflow activities JavaScript / TypeScript Dataverse Web API / SDK Deep understanding of: Solution managemen

Appium-Python -Testing, Docker, Kubernetes, Playwright Python Testing, Python - Data Science. Python developer responsible for building scalable automation solutions to streamline database operations. Hands on experience with API development using Python and FastAPI.

Responsibilities include designing identity flows, securing RESTful APIs, and automating deployment using CI/CD processes. A global consulting firm is seeking a highly skilled Application Developer to focus on identity API development within the Google Cloud Platform. The role requires experience in

API Development and Integration Skills - Practical experience with Mulesoft and Postman for API development, testing, and lifecycle management.

PURVIEW is looking for a Python developer in Sheffield to build scalable automation solutions for streamlining database operations. The ideal candidate will have hands-on experience with API development using Python and FastAPI, and a strong background in troubleshooting automation issues, design an

DevX_Kotlin (or Java) Developer SheffieldHybrid - 60% office 40% home Duration: 30/11/2026 Rate £418 MUST BE PAYE THROUGH UMBRELLA Role Description: Required Experience in Kotlin (or significant Java experience with a willingness to learn Kotlin) Experienced in at least two or three of the following: API development, SQL/databases, HTML/Javascript Experience working with standard developer collaboration Tools: Github/Bitbucket, Jira, ConfluenceOptional Jenkins pipelines Test automation ABOUT THE PROJECT The Developer Experience (DevX) Standards and Controls function is building a platform for control owners and development teams to manage/view their compliance with a range of software development controls. The candidate would be working on Kotlin and Java-based web applications and APIs. There are 2-3 applications and PoCs we are hiring for. Exact candidate allocation will depend on their experience and fit. All have a microservice architecture built using modern coding techniques. YOUR RESPONSIBILITIES Collaborate with developers, testers and the wider organisation to build and run products Design, develop & implement of both front end and back-end features as per backlog/priority. All apps use a simple UI framework so not strictly 'front-end' development. Collaborate with the rest of the engineering team to design and launch new features. Proactively work with customers to resolve their issues and respond to feature requests. Build APIs and microservices that solve impactful business problems Work in an agile CI/CD environment to deliver rapid iterations at a sustained velocity Be an active member of a team, participating in peer reviews and in testing others code through automated test scriptingSKILLS & EXPERIENCE WE REQUIRE Experience in Kotlin (or Java with willingness to learn Kotlin) Experienced in at least two or three of the following: API development, SQL/databases, HTML/Javascript Strong technical and analytical troubleshooting skills Experience in working with Agile including the use of Jira/ Confluence. Understanding of Microservices Good interpersonal skills English (B2+)OPTIONAL/NICE TO HAVE Good working knowledge of cloud technologies like AWS, Azure and GCP Experience building out CI toolchains using Jenkins CI/CD A background in Systems Administration across Linux/AIX/WAS platformsWHAT WE OFFER Contact with top IT technologies available in the market Internal training events and workshops In-house seminars with leading industry experts

Agentic Software Engineer Our client is a UK-based organisation operating in the medtech industry, with a team of around 200 people. They design and manufacture bespoke solutions that improve patients’ quality of life. They are investing significantly in technology and automation to support their next phase of growth. A key initiative is the development of a new digital platform that connects prescription workflows, manufacturing processes, and patient outcomes into a single integrated system. The role This is a hands-on lead role suited to someone who works agentically- using AI systems to plan, scaffold, and deliver complex development tasks, while applying strong engineering judgement to review and refine outputs. As the first dedicated developer on this platform, you will work closely with senior leadership from initial concept through to production delivery, playing a central role in shaping both the system and the future team. Our client is looking for someone entrepreneurial and highly proactive, who is comfortable engaging directly with clinicians and operational teams to understand real-world problems before building solutions. Key responsibilities: Direct AI coding agents across complex, multi-step development tasks, structuring context and taking full ownership of outputs Translate requirements, user journeys, and wireframes into working software Develop across the full stack: front-end interfaces, APIs, data models, and integrations Contribute to architectural decisions (data models, authentication, hosting, security) using senior-level judgement Maintain strong version control and deployment practices (Git, branching, code review, CI/CD) Work closely with clinical, operational, and manufacturing teams to inform product development Support the growth and shaping of the technical team over time Planned technology stack: Front-end: React + TypeScript, Tailwind CSS, shadcn/ui Mobile: Capacitor (shared codebase across web and mobile) Offline capability: Progressive Web App (PWA) Backend: Node.js with a single API and multiple front-end clients Database: PostgreSQL Hosting: AWS or Azure with infrastructure-as-code CI/CD: GitHub Actions with per-PR environments Deployment: Docker-based containerisation Authentication: Auth0 or Clerk (TBC) What our client is looking for: Strong full-stack development experience (React, TypeScript, Node.js) Experience designing REST APIs and working with relational databases (e.g. PostgreSQL) Practical cloud experience (AWS or Azure), including deployment and CI/CD pipelines Proven ability to work in an agentic way with AI development tools — structuring problems and critically evaluating outputs Strong understanding of authentication, authorisation, data modelling, security, and edge cases Excellent communication skills, with the ability to engage both technical and non-technical stakeholders A self-driven, entrepreneurial mindset, comfortable working autonomously within a small, high-impact team What’s on offer: Scope to shape a growing platform and team 25 days annual leave plus bank holidays Company pension scheme Flexible hybrid working Budget for AI tooling and productivity tools Interested? Please Click Apply Now We are particularly interested in hearing about: Projects delivered using AI-assisted development workflows Tools you use regularly How your development approach has evolved alongside AI advancements Agentic Software Engineer

Microsoft 365 / Entra ID / SSO / MFA Role: IAM Engineer Contract: 6+ months initially IR35: Inside IR35 Day Rate: Up to £800 per day (via umbrella) potential for flex DOE Location: Hybrid - 2 days/week on‑site in Sheffield, remainder remote Start: ASAP Summary An established well known national organisation is seeking a hands‑on IAM Engineer to implement and operate identity, authentication, and access controls across Microsoft 365 and Microsoft Entra ID (Azure AD). Focus is on SSO, MFA, Conditional Access, identity lifecycle, and privileged access (with CyberArk as a desirable skill). This is a delivery and operations role (not an architect), partnering with Security, Infrastructure, and Service Management to harden controls, reduce risk, and improve user experience. Responsibilities Entra ID operations & hardening: tenant hygiene, identity security baseline, Conditional Access (CA) design/maintenance, break‑glass access. SSO engineering: onboard and support SAML/OIDC apps; configure enterprise app registrations, claims, tokens, and session settings. MFA at scale: method policies (Authenticator, FIDO2, SMS), registration campaigns, CA‑based MFA enforcement, resilient admin access patterns. Lifecycle & access controls: group‑based access, dynamic groups, PIM (just‑in‑time admin), RBAC reviews, access reviews, least‑privilege enforcement. Microsoft 365 alignment: integrate with Defender for Cloud Apps, govern Exchange/SharePoint/Teams access, improve Secure Score.Required Skills & Experience Proven, hands‑on Microsoft Entra ID administration: app registrations, Conditional Access, Identity Protection, authentication strengths, and policy operations. SSO delivery using SAML 2.0 / OIDC / OAuth 2.0: enterprise app onboarding, claims mapping, token troubleshooting (SAML traces, Fiddler, browser dev tools). MFA engineering and rollout: CA‑based MFA, method policies, break‑glass procedures, staged/targeted deployments. Microsoft 365 security controls: Exchange, SharePoint/OneDrive, Teams governance and access configuration.Desirable CyberArk PAM (Core PAS): Safes, platform onboarding, credential rotation, PSM/PSMP, API integration.If you have the relevant skills and interested in hearing more please apply with your latest CV

Kotlin / Java Developer (Contract) - Outside IR35 Sheffield (Grosvenor House) | Hybrid (2 days onsite) Full-time Contract £300 per day (Outside IR35) The Opportunity We're seeking a proactive and skilled Kotlin / Java Developer to join a cutting-edge Developer Experience (DevX) Standards & Controls team within a global technology environment. You'll be working on modern, microservices-based applications and APIs that help development teams manage and demonstrate compliance across software delivery. With multiple applications and PoCs in play, this role offers variety, ownership, and the chance to work with modern engineering practices. What You'll Be Doing Collaborate with developers, testers, and stakeholders to build and run high-quality products Design, develop, and implement backend features aligned to business priorities Contribute to lightweight front-end components using a simple UI framework Build and maintain APIs and microservices Work directly with customers to resolve issues and respond to feature requests Participate in agile CI/CD delivery with rapid, iterative releases Engage in peer reviews and contribute to automated testing practices Play an active role in a collaborative, high-performing engineering team What We're Looking For Essential Skills: Strong experience in Kotlin, or Java with a willingness to learn Kotlin Experience in API development, SQL/databases, and/or HTML/JavaScript Strong coding standards with excellent attention to detail Proactive mindset with the ability to self-drive and unblock issues Experience using tools such as GitHub/Bitbucket, Jira, and Confluence

Job Title: Java Developer – Developer Experience Platform - Sheffield Job Description Join a collaborative engineering team building a modern Developer Experience platform that helps control owners and development teams manage and view their compliance with software development controls. You will work primarily with Kotlin to develop microservice-based web applications and APIs, contributing to several applications and proofs of concept within a cloud-native, agile environment. This role suits someone proactive, detail-oriented, and comfortable working across back-end services with a small element of simple UI development. Responsibilities Collaborate closely with developers, testers and colleagues across the wider organisation to build, enhance and run high-quality products. Design, develop and implement back-end features according to the product backlog and priorities, with a small amount of simple front-end work where required. Work on web applications that use a straightforward UI framework, focusing primarily on robust back-end and API development rather than complex front-end engineering. Contribute to the design and launch of new features in partnership with the rest of the engineering team, ensuring solutions are scalable, maintainable and secure. Build, maintain and optimise APIs and microservices that underpin the Developer Experience platform. Engage proactively with internal customers to understand their needs, resolve issues and respond to feature requests in a timely and professional manner. Operate within an agile CI/CD environment to deliver frequent, high-quality iterations at a sustained and predictable velocity. Participate actively in peer code reviews, providing constructive feedback and helping to maintain high coding standards. Create and maintain automated test scripts, and contribute to testing colleagues’ code to ensure reliability and quality. Use standard developer collaboration tools such as Git-based repositories and agile tracking platforms to manage work, documentation and collaboration effectively.Essential Skills Practical Experience in Java, or significant Experience in a comparable modern programming language with a strong willingness to learn Kotlin quickly. Proven Experience in at least two or three of the following areas: API development, SQL and relational databases, HTML, and JavaScript. Substantial hands-on Experience working with microservice architectures, including designing, building and maintaining microservices. Strong technical and analytical troubleshooting skills, with the ability to diagnose and resolve complex issues in distributed systems. Experience working in an agile environment, including the use of agile methodologies and collaboration practices. Experience using standard developer collaboration tools such as GitHub or Bitbucket for version control, and Jira and Confluence or similar tools for work tracking and documentation. Excellent attention to detail and strong writing skills, producing clear, maintainable and well-documented code. Proactive working style, taking initiative to move work forward and resolve blockers without waiting for direction. Strong English communication skills, both written and spoken, enabling effective collaboration with technical and non-technical stakeholders.Additional Skills & Qualifications Good working knowledge of cloud technologies such as AWS, Azure and Google Cloud Platform (GCP). Experience with Kubernetes for container orchestration in a microservices environment. Familiarity with Spring Boot or similar frameworks for building Java or Kotlin-based microservices. Experience working with CI/CD pipelines and modern DevOps practices. Comfort using issue tracking and documentation tools such as Jira and Confluence. Ability to work effectively with diverse teams across different locations and time zones. Strong interpersonal skills, with the ability to build positive working relationships and communicate clearly with stakeholders.Why Work Here? You will join a global organisation that supports complex, large-scale financial services for corporates, governments and institutions around the world. The business leverages an extensive international network to connect emerging and markets, offering exposure to innovative products and services across advisory, financing, prime services, research, securities services, trading and sales, and transaction banking. You will work in a modern, agile engineering culture that values collaboration, continuous improvement and technical excellence, with opportunities to contribute to impactful platforms and to develop your skills in cloud, microservices and contemporary development practices. Work Environment You will work within a modern engineering environment focused on developer Experience and software quality, building Kotlin-based web applications and APIs in a microservice architecture. The team uses agile methodologies and operates in a CI/CD setting, enabling frequent, incremental releases and rapid feedback. Day to day, you will use tools such as GitHub or Bitbucket for version control, Jira for work tracking and Confluence for documentation, collaborating closely with developers, testers and stakeholders across the organisation. The technology stack includes Kotlin, microservices, Kubernetes, APIs, SQL/databases, HTML, JavaScript, and cloud platforms such as AWS, Azure and GCP. The role is office-based in Sheffield with a professional environment that supports focused development work and cross-functional collaboration. Location Sheffield, UK Trading as TEKsystems. Allegis Group Limited, Maxis 2, Western Road, Bracknell, RG12 1RT, United Kingdom. No. (phone number removed). Allegis Group Limited operates as an Employment Business and Employment Agency as set out in the Conduct of Employment Agencies and Employment Businesses Regulations 2003. TEKsystems is a company within the Allegis Group network of companies (collectively referred to as "Allegis Group"). Aerotek, Aston Carter, EASi, Talentis Solutions, TEKsystems, Stamford Consultants and The Stamford Group are Allegis Group brands. If you apply, your personal data will be processed as described in the Allegis Group Online Privacy Notice available at (url removed)> To access our Online Privacy Notice, which explains what information we may collect, use, share, and store about you, and describes your rights and choices about this, please go to (url removed)> We are part of a global network of companies and as a result, the personal data you provide will be shared within Allegis Group and transferred and processed outside the UK, Switzerland and European Economic Area subject to the protections described in the Allegis Group Online Privacy Notice. We store personal data in the UK, EEA, Switzerland and the USA. If you would like to exercise your privacy rights, please visit the "Contacting Us" section of our Online Privacy Notice at (url removed)/en-gb/privacy-notices for details on how to contact us. To protect your privacy and security, we may take steps to verify your identity, such as a password and user ID if there is an account associated with your request, or identifying information such as your address or date of birth, before proceeding with your request. If you are resident in the UK, EEA or Switzerland, we will process any access request you make in accordance with our commitments under the UK Data Protection Act, EU-U.S. Privacy Shield or the Swiss-U.S. Privacy Shield

We’re looking for an API Product Sales Executive to drive adoption of our payments-as-a-service offering with enterprise customers.

Strong experience with API management platforms such as MuleSoft Apigee Kong or AWS API Gateway. Define end to end API architectures including authentication authorization flows data models integration patterns and API security controls. As a Solution Architect you will be at the forefront of this t

We’re looking for an API Product Sales Executive to drive adoption of our payments-as-a-service offering with enterprise customers.

This role emphasizes collaboration within a cross-functional team and requires experience with RESTful APIs.

We’re looking for an API Product Sales Executive to drive adoption of our payments-as-a-service offering with enterprise customers.

The candidate will lead the development of high-quality designs, maintain architecture documentation, and ensure robust data integration between legacy systems and modern APIs. Java, PostgreSQL, and API management.

This hybrid role requires expertise in API integration and data flows to improve healthcare interoperability.

A logistics technology firm in the United Kingdom seeks a Senior Business Analyst to join their product and delivery team.The role involves gathering and documenting business requirements, working closely with cross-functional teams, and acting as a bridge between business stakeholders and technical

A leading fintech organization in Greater London is seeking a Senior Business Analyst to join its EMEA delivery team.You'll act as a liaison between customers and internal tech teams, analyzing business requirements and supporting project implementation.Ideal candidates have over 15 years of financi

A leading software solutions provider is seeking a Mid-Market Sales Representative to drive new business acquisition for the ShipStation API within the European mid-market segment. The ideal candidate will have 3–6 years of B2B sales experience in SaaS or technology, excellent communication skills

A leading tech consulting company is seeking an experienced API Platform Architect to lead the architecture and engineering of their enterprise API Platform. The ideal candidate will have over 12 years of industry experience, strong problem-solving skills, and the ability to mentor teams in cloud-na

Capita is looking for a MuleSoft Architect to join their team in London. The role involves leading the design and architecture of API-led solutions for major UK Government and private-sector clients. Capita offers a competitive salary and a variety of benefits.

Own APIOps pipeline definition for APIM deployments, testing, API versioning, and documentation automation. API Platform across Azure, AKS, APIM, networking, security, observability, and DevOps layers. API standards, APIOps pipelines, lifecycle processes, platform SLAs/SLOs.

Salesforce in Greater London is searching for a Consumption Value Delivery Senior Manager to manage strategic accounts and drive customer success.As part of your role, you will leverage AI tools and direct customer relationships to ensure the growth and retention of key accounts.You will be responsi

A growing tech company near London is seeking talented Full Stack JavaScript Developers to join their team.This role involves developing high-quality web applications using JavaScript and the Next.Candidates should have strong JavaScript skills and a proactive mindset towards problem-solving.Additio

A tech staffing agency is seeking a Data Engineer to support the delivery of the Domain API by ensuring compliance with enterprise data standards.

Bonus: experience with eCommerce, pricing, or high‑throughput API systems.

A health technology company is seeking a skilled video editor to create engaging short-form content from long-form materials.The ideal candidate will have a portfolio showcasing successful pieces, an understanding of health and fitness culture, and proficiency in editing tools like Adobe Premiere an

A leading tech company in Greater London is seeking an enthusiastic Engineer to develop innovative API products for tax automation. You will own and build REST APIs while ensuring high quality and reliability, using a tech stack including Node.

Candidates should be proficient in programming languages like Java, Python, or C# and have experience in API testing.

The ideal candidate will possess strong expertise in API integration, REST API design, and experience in Trading or Finance sectors. A Swiss IT engineering firm is seeking a Senior API Integration Expert based in London to design and govern an API integration layer for a complex energy trading envir

This role requires 3+ years in solutions engineering and experience with REST APIs and JavaScript.

Ideal candidates will have strong skills in Cypress, API testing, and performance testing, along with excellent communication abilities.

Requirements:*** Around 3 years of professional experience in backend development, with a strong focus on Java and direct experience building and maintaining RESTful APIs and services. Solid understanding of core backend engineering concepts, including API design, data access layers, testing practic

The ideal candidate will have 3+ years in technical solutions engineering and experience with API integrations.

Change is looking for a Backend Engineer in the United Kingdom to support the evolution of their platform with a focus on APIs and system integrations. You will design and maintain APIs, develop integration solutions, and collaborate with cross-functional teams to enhance data flow and analytics.

Ideal candidates have 3+ years in product management with a focus on APIs, a strong grasp of technical concepts in AI, and passion for early-stage ventures. A leading video tech company is seeking a Technical Product Manager to spearhead their API initiatives.

HTTP API powering pricing and promotions across all of Tesco’s channels. We’re building a robust, internet‑facing API that runs both in stores and in the cloud, designed to support future innovation at scale.

Ideal candidates should have over 5 years of commercial frontend experience and be comfortable building API-driven applications.

A UK-based technology company is seeking a skilled QA Engineer to join their team.This hands-on role is for professionals with 3–6+ years of QA experience who enjoy robust functional and regression testing.The position is remote, offering the chance to work on international UK projects while colla

A pioneering legal tech company based in Greater London is seeking a Senior Customer Solutions Engineer who will work across Sales, Product and Customer Success.The candidate should have strong technical skills, integrating solutions to enhance customer experience.Responsibilities include building i

The ideal candidate will need over 5 years of experience in technical support, particularly with RESTful APIs. This role involves managing customer relationships, troubleshooting API issues, and collaborating with various teams.

Software Engineer III – (Java / Databricks / API). Around 3 years of professional experience in backend development, with a strong focus on Java and direct experience building and maintaining RESTful APIs and services. Solid understanding of core backend engineering concepts, including API design,