168 software engineer jobs found

Java Software Engineer (contract outside of IR35) About Us   In 2019, the founders were working as engineers solving complex cross-domain problems within government organisations.   TwinStream was formed to bring together their collective expertise and experience into a single business, focused on delivering technical excellence and high-quality service to clients.   Since then, the company has grown to over 100 team members across the UK, with colleagues working both on-site with clients,  hybrid  and remotely from home.     Details:    3-month (rolling) contract outside of IR35 Rate: £500 - £600 per day /    Location: Remote, with potential travel to the Bristol office in the future. Security: BPSS   About the role:    TwinStream software engineers (Java) develop components of a...

About The Role What if your years of software engineering experience could directly shape how AI writes code for millions of developers? We're looking for Software Engineers in London to evaluate, rank, and refine AI-generated code — helping the next generation of coding assistants produce solutions that are correct, efficient, idiomatic, and production-ready. Your deep understanding of software architecture, design patterns, and real-world engineering trade-offs is exactly what AI models need to get better. This isn't about writing boilerplate — it's about applying expert judgment to push the boundaries of what AI can do with code. This is a fully remote, flexible contract role built for experienced developers who want meaningful, high-impact work on their own schedule. Organization: Alignerr Type: Hourly Contract Location: Remote Commitment: 10–40 hours/week What You'll Do Review and rank AI-generated code solutions across...

Software Engineer – Ruby (AI Training) About The Role What if your Ruby expertise could directly influence how AI writes and understands backend code for developers around the world? We're looking for experienced Ruby Software Engineers to work on real-world software systems that power data-driven and AI-supported workflows — reviewing, building, and evaluating production-grade code that helps train the next generation of AI models. This is a fully remote, flexible contract role. Work asynchronously on your own schedule, take on as many hours as suits you, and make a tangible impact on how AI reasons about software engineering. Organization: Alignerr Type: Hourly Contract / Task-Based Location: Remote Commitment: 10–40 hours/week What You'll Do Develop and maintain backend services and APIs using Ruby and Ruby-based frameworks Review and analyze existing codebases for correctness, performance, and maintainability...

Software Engineer - Quantitative Decision Systems Experienced Junior to Mid-Level Location:  Remote, London-based Engagement:  Initial contractor, intended to convert to permanent Indicative contract rate:  GBP 350-550/day; target c. GBP 450/day Indicative permanent salary:  GBP 55,000-80,000 Reporting to:  Naverion Chief Technical Officer (CTO)   Role Summary Naverion is seeking a software engineer at experienced-junior to mid-level to deliver defined components across its quantitative decision platform. Working directly with the CTO, the engineer will implement, test, document and support the controlled release of production software. The role suits someone who can progress bounded work independently and, at the upper end of the range, own defined components through the full SDLC. Architecture, methodology, clinical interpretation, security design and production approval remain with the CTO and relevant...

Contract Software Engineer - WebCompat Tooling (Dashboards and Reporting), Firefox The role You will build and improve the WebCompat team’s internal tooling, the dashboards and the broken-site-report screenshot pipeline the team relies on to triage and prioritize site breakage. This is a focused tooling role that makes the WebCompat program faster and more data-driven. Responsibilities Build and improve WebCompat dashboards (triage, reporting, and metrics). Improve the broken-site-report screenshot capture and pipeline. Work with the WebCompat team (including QA) to turn reporting and triage needs into reliable tooling. Required qualifications Solid web development (JavaScript, HTML, CSS, Python & Django) and experience building dashboards / data views. Comfort with tooling, automation, and web services. Self-directed, with good written communication. Preferred Familiarity with WebCompat workflows and Bugzilla....

AI Software Engineer – Runtime & Systems (Contractor)   About Huawei Research and Development UK Limited Founded in 1987, Huawei is a leading global provider of information and communications technology (ICT) infrastructure and smart devices. We have 207,000 employees and operate in over 170 countries and regions, serving more than three billion people around the world. Our vision and mission is to bring digital to every person, home and organization for a fully connected, intelligent world. To this end, we will drive ubiquitous connectivity and promote equal access to networks; bring cloud and artificial intelligence to all four corners of the earth to provide superior computing power where you need it, when you need it; build digital platforms to help all industries and organizations become more agile, efficient, and dynamic; redefine user experience with AI, making it more personalized for people in all aspects of their life, whether they’re at...

Job Summary We are seeking a dynamic and passionate Software Engineer to join our innovative development team! In this role, you will play a vital part in designing, developing, and maintaining cutting-edge software solutions that drive our business forward. Your expertise will help craft scalable applications, integrate APIs, and optimize system performance across various platforms. This is an exciting opportunity for someone eager to work with a diverse tech stack and contribute to impactful projects in a fast-paced environment. If you thrive on solving complex problems with code and enjoy collaborating with talented professionals, we want to hear from you! Duties Develop, test, and deploy robust software applications using languages such as JavaScript, Java, C#, Python, C++, Ruby on Rails, C, and VBA. Collaborate with cross-functional teams to gather requirements and translate them into technical specifications for application development. Design and...

We 're looking for experienced software engineers to build AI coding tasks from a codebase they know well. $750 Pounds per task, and you can do as many tasks as you want. You turn a real change from a repository you know into a task that today 's best AI coding models struggle with: hard for the models, but fair for a skilled engineer. Your tasks are used to measure and train AI coding models. Remote, any location. $750 Pounds per task that passes review. Minimum of one task a week, about 10 hours a week.   How it works Apply. Complete a short screener interview and upload your resume. Propose. Once you 're selected, pick a change from a repository you know and submit a short proposal. We approve it or suggest a better candidate. Build. In our platform, set up the repository as it was before the change, then write the brief, the correct solution and the grading checks. Stress-test. Try lazy, incorrect and shortcut solutions and make sure...

World Wide Technology (WWT), a 36-year-old global technology integrator and IT solutions provider. Through our culture of innovation, we inspire, build, and deliver business results from idea to outcome. World Wide Technology (WWT) has an opportunity for a Python Software Engineer to join a team building configuration management software for a large-scale private cloud platform within a leading financial services organisation. This is a hands-on development role, not an SRE or infrastructure automation position you'll help re-architect existing software as the platform evolves toward a zoned, enclave-based network model, while keeping performance and reliability intact.   This is a contract Role & Inside IR35   Python Software Engineer Contract Duration: 12 months Location: London or Glasgow (3 days per week in office)   Key Responsibilities Build and maintain production-grade Python applications. Re-architect software to...

World Wide Technology (WWT), a 36-year-old global technology integrator and IT solutions provider. Through our culture of innovation, we inspire, build, and deliver business results from idea to outcome. World Wide Technology (WWT) has an opportunity for a Python Software Engineer to join a team building configuration management software for a large-scale private cloud platform within a leading financial services organisation. This is a hands-on development role, not an SRE or infrastructure automation position you'll help re-architect existing software as the platform evolves toward a zoned, enclave-based network model, while keeping performance and reliability intact.   This is a contract Role & Inside IR35   Python Software Engineer Contract Duration: 12 months Location: London or Glasgow (3 days per week in office)   Key Responsibilities Build and maintain production-grade Python applications. Re-architect software to...

Full job description Joining a new project Ideally have worked on Financial Services Projects before (Payments would be great) Fullstack Experience Tech Stack - Kotlin Backend, JS/TS React Frontend Start date ASAP Duration 6 months (Likely to extend) 2/3 days / week in person working (London) Immediate Interviews   The best bit about Red Badger is, of course, the team. We are really proud of our people; we support and learn a lot from each other; we work really hard but have fun doing it. We are a diverse group made up of 22 different nationalities, speaking 17 different languages.   Our 3 founders, Dave, Cain and Stu, who have considerable tech and consultancy experience and still own 100% of the company. We've been consistently profitable and have grown responsibly from the beginning.   We are based at Old Street in the heart of "tech city" and get thoroughly stuck in with the brilliant...

About The Role Alignerr is building a dataset of expert tasks that train and evaluate advanced AI agents on real enterprise engineering work. As a Task Author, you will design and calibrate authentic engineering challenges — diagnosing failing integrations from logs, tracing bugs through codebases, and writing and verifying real fixes — that genuinely push the limits of capable AI agents. London's engineering scene spans fintech, enterprise SaaS, and deep-tech — and this role is built for engineers who operate in that world. If you debug real systems, write infrastructure code, and understand what a production failure actually looks like, your expertise is exactly what we need. Organization: Alignerr Type: Hourly Contract Location: Remote Commitment: Flexible, task-based Key Responsibilities Author realistic engineering task prompts covering integration failures, log-based debugging, bug traces through source code, and...

Contract Start Date: TBC Contract Length: Likely 6 months Contract Classification: Inside IR35 Contract Location: Glasgow (flexible) Design, implement, and manage secure cloud infrastructure solutions on Google Cloud Platform. 3+ years of software engineering experience with core GCP services such as Compute Engine, BigQuery, and Kubernetes. Strong knowledge of IAM, Terraform, and scripting with Python or Golang. Ensure compliance and governance within cloud environments. Collaborate with cross-functional teams to deliver scalable cloud solutions.

About the Role What if your precision with YAML configurations and structured data could directly influence how AI systems understand and operate in the real world? We're looking for detail-oriented Software Engineers to review, author, and evaluate YAML-based configurations and workflows — helping ensure the AI systems powering tomorrow's technology are built on a solid, reliable foundation. This is a fully remote, flexible contract role designed for engineers who love working close to the metal — configuration files, schemas, and system logic are your natural habitat. Organization : Alignerr (Powered by Labelbox) Type : Hourly Contract Location : Remote Commitment : 10–40 hours/week What You'll Do Author, review, and maintain YAML files used for configuration, data pipelines, and system definitions Ensure YAML structures are accurate, well-organized, and compliant with required schemas Identify formatting issues,...

About The Role What if the code you write could directly shape how the next generation of AI understands and generates software? We're looking for Software Engineers in London to build, evaluate, and improve AI-generated code — helping train AI systems to think like real developers. You'll write solutions, review AI outputs, and provide the expert-level feedback that makes AI coding assistants smarter, safer, and more reliable. This is hands-on engineering work at the frontier of AI development — not theoretical, not bureaucratic, and not boring. This is a fully remote, flexible contract role. If you can write clean code and explain your reasoning, we want to hear from you. Organization: Alignerr Type: Hourly Contract Location: Remote Commitment: 10–40 hours/week What You'll Do Write, debug, and optimize code across a range of languages, frameworks, and problem domains Review and evaluate AI-generated code for correctness,...

Key Accountabilities Responsibilities will include: · Design, develop and maintain highly available, secure, and performant backend REST API services along with frontend client using Python , Golang, Docker and Cloud-Native services . · Implement and manage database schema changes using Liquibase , ensuring alignment with compliance and audit standards. · Collaborate closely with Architecture and DevOps teams to enhance, maintain and mature Product capabilities/features. · Perform root cause analysis and implement solutions for incidents and performance bottlenecks. Qualifications and experience The ideal candidate for this role will have the below experience and qualifications: · Bachelor’s or Master’s degree in Computer Science or equivalent industry experience. · Comes from Software Engineering background with infrastructure experience. · 5+ years of development experience...

Key Accountabilities Responsibilities will include: · Design, develop and maintain highly available, secure, and performant backend REST API services along with frontend client using Python , Golang, Docker and Cloud-Native services . · Implement and manage database schema changes using Liquibase , ensuring alignment with compliance and audit standards. · Collaborate closely with Architecture and DevOps teams to enhance, maintain and mature Product capabilities/features. · Perform root cause analysis and implement solutions for incidents and performance bottlenecks. Qualifications and experience The ideal candidate for this role will have the below experience and qualifications: · Bachelor’s or Master’s degree in Computer Science or equivalent industry experience. · Comes from Software Engineering background with infrastructure experience. · 5+ years of development experience...

Key Accountabilities Responsibilities will include: · Design, develop and maintain highly available, secure, and performant backend REST API services along with frontend client using Python , Golang, Docker and Cloud-Native services . · Implement and manage database schema changes using Liquibase , ensuring alignment with compliance and audit standards. · Collaborate closely with Architecture and DevOps teams to enhance, maintain and mature Product capabilities/features. · Perform root cause analysis and implement solutions for incidents and performance bottlenecks. Qualifications and experience The ideal candidate for this role will have the below experience and qualifications: · Bachelor’s or Master’s degree in Computer Science or equivalent industry experience. · Comes from Software Engineering background with infrastructure experience. · 5+ years of development experience...

Job Title: Software & DevOps Engineer Location: London Hybrid Duration: 12 months Contract Start Date: November, ASAP Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role This role requires a senior software engineer specializing in Java and JavaScript development to design, build, and secure enterprise-level applications and platforms. The consultant will be a key figure in enhancing software supply chain security and driving the adoption of secure development practices across the...

Job Title: Software & DevOps Engineer Location: London Hybrid Duration: 12 months Contract Start Date: November, ASAP Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role This role requires a senior software engineer specializing in Java and JavaScript development to design, build, and secure enterprise-level applications and platforms. The consultant will be a key figure in enhancing software supply chain security and driving the adoption of secure development practices across the software...