1 to 25 of 369 Permanent Open Source Jobs in the UK

ROLE We are looking for a professional with proven experience in the areas of digital payments, especially in implementation of Government-to-People (G2P ) payments systems to lead our Open Source G2P Payment work programme. The Digital Payments Specialist will be responsible for supporting the overall CCAF programmatic activities involving the research initiative and the relationship with industry … stakeholders, financial authorities, regulators and policymakers to translate best practices into actionable outputs for the responsible implementation of open source G2P payment systems. This role involves: a) conducting research on open source tools and G2P payments, such as benchmarking the current state of the industry, regulatory and supervisory frameworks, implementation approaches, and risks involved; b) strongly … experts and regulatory analysts in the CCAF/Fii network. The role holder will report to the Head of Market & Infrastructure Observatory. RESPONSABILITIES Conduct research and comparative analysis on Open Source G2P Payment systems, such as market dynamics (solutions, service providers), implementation approaches, risks, country case studies, regulatory environment (policy, regulation, and supervision), with a focus on best More ❯

Get paid to write open-source software Do you want to work on software used by billions around the world? Do you believe in the goals of the open-source software community? This team wants to hear from you. You will be working alongside similarly enthusiastic and highly skilled developers building software with open-source projects and making important contributions to the open-source community. You could be working on improvements to WebKit, or building new Linux kernel driver, or one of countless other projects this team tackles, all of them deeply technical. Requirements: • Knowledge and interest in developing systems level software such as kernel drivers, web rendering engines, display servers, or … A/V libraries. • Demonstrable and significant contributions to open-source projects. This includes engagement with the community and understanding of open-source development methodologies not just code commits. • High level of skill in C. Additional knowledge of Rust would be beneficial. • A Computer Science degree or similar experience. You will be working in a globally More ❯

the desktop and data centre. 'Wherever Computing Happens', we need to enable Arm by providing software solutions that interface higher-level software stacks with the hardware itself. Responsibilities: Our Open Source Software group is enabling new Arm architecture in projects such as kernel, firmware, system control and driver development, for a variety of target markets. Software on Arm … As well as the technical work of writing patches to implement new functionality, improve performance and enable new Arm architecture, you will enjoy working as part of the wider open source community. Required Skills and Experience: Proficient C programmer Desire and ability to work as part of a team Passion for open source development "Nice To … Have" Skills and Experience: Armv8-A Architecture Arm64 assembly language Experience of open source working practices Knowledge of Android, Linux kernel, driver development, security, cryptography In Return: Our UK offices are amazing places to collaborate. We also have some scope to adapt the job role and title for the right person - if you are interested but unsure whether More ❯

s your chance to take full ownership of frontend projects from design to delivery with minimal supervision! About Ballerine Ballerine is a high-growth, early-stage startup building an open-source platform for identity verification and risk management in the financial sector. It’s a fast-paced team preparing for Series A funding — and looking for a Senior … in React, TypeScript, modern frontend frameworks and architectures • Strong understanding of state management, performance optimization, and scalable component-driven design • Experience with testing frameworks (Jest, Cypress, Playwright) • Comfort with open-source principles and contributions • Clear, confident communication in English (minimum C1, no heavy accents) • Ability to onboard quickly and deliver at startup pace • Proactive, independent, and ownership-driven … Chance to join a core team pre-Series A, shaping the product and the company’s direction • Work on complex, high-scale challenges with cutting-edge tools (LLMs, AI, open-source) • A culture where your voice matters — small team, high impact, no bureaucracy • Opportunities for technical leadership and direct influence on strategy • Fully remote role Responsibilities • Architect, develop More ❯

and Bristol, our UK offices are where emerging talent contributes to global innovation. Whether you're helping to shape the next generation of processors or building tools used across open-source communities, the work you do here will have real-world impact from day one. Our roots in the UK run deep and so does our commitment to … the UK. I wanted to join Arm to grow at a company tackling some of the most exciting challenges in tech, in an inclusive and welcoming environment. Working on open-source projects has been a rewarding challenge - learning how to contribute on behalf of Arm and meet the high standards these projects demand. Intern, based in Manchester Graduate … looking for more than just technical ability. At Arm, we want individuals who are curious, collaborative, and motivated to learn. Whether you're experimenting with side projects, contributing to open-source work, or stepping outside your comfort zone, we value candidates who bring initiative and creativity to everything they do. "I'd recommend checking out the blogs on More ❯

d) Full Time London, Vereinigtes Königreich With Professional Experience 7/15/25 stackable - who are we? Stackable is an innovative technology company focused on delivering cutting-edge, open source Big Data solutions for data lakehouses, data mesh, event processing and AI. We specialise in designing, deploying, and managing scalable data infrastructures that empower businesses to harness … mission at stackable: We are looking for a skilled Solutions Architect with a strong background in Big Data to join our team. The ideal candidate will have expertise in open source Big Data technologies and Kubernetes and DevOps practices . This role will be instrumental in designing, implementing, and optimizing cloud-based and on-premise data solutions for … Working either remote or onsite with our customers from UK A technology-focused start-up culture Choice of development tools The chance to shape a sustainable and future-oriented open source product Our engineering mindset: our aim is make bring architectures and software available in the most automated, maintainable and robust way possible! Diverse training opportunities and social More ❯

creativity, precision, and a shared obsession with what’s next. You’ll be part of a team shaping the future of Agentic AI - architecting and scaling a next-gen open-source framework that powers autonomous systems across industries. We're not just talking innovation - we're building it. Fast . Startup inside Kyndryl: Zero bureaucracy. You’ll work … equally — ideas over titles. What You’ll Do Serve as the bridge between deep technical work and business transformation, solving meaningful challenges through Agentic AI. Work on a modular, open-source Agentic AI framework - integrating GenAI and real-world tools. Develop, train, and deploy intelligent agents using tools like Python, Azure ML, focused on dynamic, self-improving systems. … e.g., microservice ecosystems, message brokers) Plus, You Bring Ability to operate independently and collaborate within a high-trust, low-hierarchy team Contributions to academic/technical communities and shaping open-source projects Bonus Points For Certifications in Azure, AWS, or Google ML platforms Demonstrated contributions to graph theory, DevOps, or distributed systems Previous projects involving digital transformation, AI More ❯

Bloomberg's software? Where do these components come from? How will we know if any are defective? How can we protect Bloomberg from malicious actors while still benefiting from open source? These are the questions you'll help us answer! The Software Composition Analysis and Security (SCAnS) team in DevX plays a foundational role in securing Bloomberg's … software supply chain (SSC) by enabling engineers to use open source and third party software safely, in an operationally resilient manner. Our products integrate with build and analysis systems to ensure software component metadata (as SBOMs) is available throughout the SSC to build a software inventory, affording license and vulnerability identification firm-wide. We control the ingress of … around Operational Resilience such as DORA, Software Supply Chain security is a hot topic in the industry and a very dynamic space to be involved in. Our team leverages open-source software (e.g. Syft), and also influences the wider industry on standards for SBOMs and SSC. We also have home-grown solutions for specific problems (e.g. the domain More ❯

X Days a week, Plymouth Clearance: Active SC Essential | Sector: Defence Role Overview Defence client requires an SC Cleared AI Engineer to build fully on-premises RAG systems using open-source technologies. You'll develop classified AI capabilities on air-gapped infrastructure with zero external dependencies. Key Responsibilities - Build end-to-end RAG pipelines on isolated defence networks … using open-source LLMs (Llama 3, Mistral, Qwen) - Deploy local vector stores (Chroma, FAISS, Milvus) with sensitive document ingestion pipelines - Host and optimise LLMs using vLLM/TGI on local GPU clusters without internet connectivity - Implement agent orchestration using LangChain/LangGraph in completely offline environments - Design secure document processing for classified materials with appropriate data sanitisation - Build … monitoring and evaluation systems that operate within air-gapped infrastructure Essential Requirements - Active SC Clearance (non-negotiable) - willingness to undergo DV if required - Demonstrable experience deploying open-source LLMs (Llama, Mistral, Falcon) on-premises - Expertise with local vector databases (Chroma, FAISS, Weaviate) in offline deployments - Strong vLLM/Text Generation Inference experience for high-throughput model serving - Proven More ❯

X Days a week Plymouth Clearance: Active SC Essential | Sector: Defence Role Overview Defence client requires an SC Cleared AI Engineer to build fully on-premises RAG systems using open-source technologies. You'll develop classified AI capabilities on air-gapped infrastructure with zero external dependencies. Key Responsibilities - Build end-to-end RAG pipelines on isolated defence networks … using open-source LLMs (Llama 3, Mistral, Qwen) - Deploy local vector stores (Chroma, FAISS, Milvus) with sensitive document ingestion pipelines - Host and optimise LLMs using vLLM/TGI on local GPU clusters without internet connectivity - Implement agent orchestration using LangChain/LangGraph in completely offline environments - Design secure document processing for classified materials with appropriate data sanitisation - Build … monitoring and evaluation systems that operate within air-gapped infrastructure Essential Requirements - Active SC Clearance (non-negotiable) - willingness to undergo DV if required - Demonstrable experience deploying open-source LLMs (Llama, Mistral, Falcon) on-premises - Expertise with local vector databases (Chroma, FAISS, Weaviate) in offline deployments - Strong vLLM/Text Generation Inference experience for high-throughput model serving - Proven More ❯

tools for others to use. A strong public track record is key-we are looking for candidates who can point to examples of successful projects they've developed, ideally open-source contributions on platforms like GitHub. Our Team Since 2021 our team has been listed every year in the "Top 100 Startups worth watching"in the EE Times … on GPUs and HPC clusters. Support algorithm design, compilation tools, and resource estimation software for quantum programs. Work independently to deliver complex software components with minimal supervision. Contribute to open-source software projects and maintain publicly accessible codebases. Engage with industry partners to translate classical problems into quantum-ready applications. Experience - Essentials Advanced degree in Computer Science, Physics … quality and project delivery. Ability to work autonomously and proactively solve engineering problems without needing step-by-step direction. Experience - Desirable Experience with HPC and GPU programming. Contributions to open-source scientific software. Familiarity with quantum software tools (e.g., Qiskit, PennyLane, QuEST). Exposure to computational chemistry tools or low-level hardware programming. Mathematica proficiency (occasional use in More ❯

Provide best Customer experience in terms of responsiveness, resolution time, tone, and knowledge Support the customer throughout their entire lifecycle Provide expert-level technical support for customers using our Open Source Ledger and other backend modules. Troubleshoot complex issues, investigating and diagnosing problems quickly, and escalating them to the development team when necessary. Create and maintain detailed documentation … product teams to deliver seamless support and relay feedback for continuous improvement. Ability to prioritize and manage multiple tickets/issues Fluent in English Nice to have : Familiarity with open-source ecosystems, APIs, webhooks, or BE tools Basic understanding of financial services infrastructure (ledgers, reconciliation, transactions) Benefits We offer a competitive package including equity for employees. We organize … regular off-sites with the team in Europe and soon in the US! About FORMANCE : Formance is building the next-generation financial infrastructure - open-source, developer-first, and built to power the most ambitious fintech products of tomorrow. Formance is global native and serving enterprise companies around the globe, around the clock, to build and scale their financial More ❯

practices, performs triaging of security issues, and implements fixes to deliver secure applications. Familiar with common software vulnerabilities and leading practices to mitigate. Should have some experience in researching open- source technologies for use in building systems and participate in open source communities as needed. Works on projects of moderate scope and complexity. Pro-actively identifies More ❯

s IT infrastructure, positioning us at the forefront of a rapidly evolving technology landscape. We're a team of experts experimenting, discovering new ways to harness the power of open-source solutions, and embracing enterprise agile methodology. We encourage professional development to ensure you bring innovative ideas to our products while satisfying your own intellectual curiosity. Our Global … and manage security testing tools and processes within the CI/CD pipeline, including static application security testing (SAST), dynamic application security testing (DAST), software composition analysis (SCA), and open source security (OSS) Work together with the DevOps team to automate security controls and compliance checks within the development pipeline, ensuring adherence to industry best practices and regulatory More ❯

About the Core Technology Team The Core Technology Team comprises several teams building tools and infrastructure used across all of our research work. This includes projects like Inspect (our open-source evaluation framework), systems for running evaluations at scale, and hosting frontier open-weights models for evaluations or human studies. Working within the Core Technology Team, you … one of our "sandbox plugins" for Inspect, supporting advanced agentic evals with safe mechanisms to let models write and execute arbitrary code Implement support for a new class of open-weights model on our model hosting platform Support a research team with designing custom infrastructure for a new research project Collaborate with the open-source community on … AI architectures. In accordance with the Civil Service Commission rules, the following list contains all selection criteria for the interview process. Additional Information We are committed to fair and open competition and equality of opportunity. We recruit on merit and value diversity. Candidates with disabilities who meet the minimum criteria are encouraged to apply. For more information on diversity More ❯

opportunity to create a more cohesive, integrated, and managed AI development life cycle to enable the building and maintenance of our AI systems. Our teams make extensive use of open source technologies such as, Kubernetes, Kubeflow, KServe, Argo, Buildpacks, and other cloud-native MLOps technologies. From technical governance to upstream collaboration, we are committed to enhancing the impact … and sustainability of open source. Join the AI Group as a Senior ML Platform Engineer and you will have the opportunity to: Architect, build, and diagnose multi-tenant AI platform systems Work closely with AI application teams to design seamless workflows for continuous model training, inference, and monitoring Work with AI experts to understand workflows, pinpoint, and resolve inefficiencies … and to inform the next set of features for the platforms Collaborate with open-source communities and AI application teams to build a cohesive MLOps experience Design CI/CD automation frameworks that incorporate regulatory requirements Develop cloud-native deployment patterns for AI systems across environments Troubleshoot and debug user issues Provide operational and user-facing documentation We More ❯

opportunity to create a more cohesive, integrated, and managed AI development life cycle to enable the building and maintenance of our AI systems. Our teams make extensive use of open source technologies such as, Kubernetes, Kubeflow, KServe, Argo, Buildpacks, and other cloud-native MLOps technologies. From technical governance to upstream collaboration, we are committed to enhancing the impact … and sustainability of open source. Join the AI Group as a Senior ML Platform Engineer and you will have the opportunity to: Architect, build, and diagnose multi-tenant AI platform systems Work closely with AI application teams to design seamless workflows for continuous model training, inference, and monitoring Work with AI experts to understand workflows, pinpoint, and resolve inefficiencies … and to inform the next set of features for the platforms Collaborate with open-source communities and AI application teams to build a cohesive MLOps experience Design CI/CD automation frameworks that incorporate regulatory requirements Develop cloud-native deployment patterns for AI systems across environments Troubleshoot and debug user issues Provide operational and user-facing documentation We More ❯

a regulated or data-rich industry (e.g., financial services, healthcare, or similar). Demonstrated track record of thought leadership in AI/ML, evidenced by patents, publications, or significant open-source contributions. Relevant industry certifications (AWS/Google/Azure/IBM ML Certifications) and deep understanding of technical courses (e.g., Andrew Ng's Coursera Courses, Andrei Karpathy … of real-world impact highly desirable. Expert-level proficiency in Python, and modern AI/ML frameworks, including PyTorch, TensorFlow, and specialised Generative AI libraries (LangChain, LangGraph or related open-source toolkits strongly preferred. Background in Traditional ML/AI is preferred. Deep understanding of LLMs, prompt engineering, RAG pipelines, vector databases, and generative architectures; related security practices More ❯

The platform supports features like real-time location mapping of officers and resources, AI-driven alerts, and live video streaming which empower officers with timely intelligence. The platform is open and supports interoperability with a wide range of third-party technologies, while community engagement tools facilitate collaboration with residents and businesses to share camera feeds and tips. By providing … Operational excellence process with improved metrics/dashboards for observability, respond to and debug livesite issues, and prevent the issues from reoccurring. Working with the latest cloud based and open source technologies What You Bring Bachelor's Degree in Computer Science, Engineering, or related field 8+ years of professional software development experience Experience designing and delivering highly-available … Go, C#, or similar Experience working with SQL or NoSQL data stores, queue services, cache services, and/or gateway services. You follow the latest in software engineering and open source technologies, and can intuit the fine line between promising new practice and overhyped fad You love delighting end users and hunger for novel challenges Benefits that Benefit More ❯

to maintain and improve the core C++ codec integration layers. Integrate compression solutions, like VC6 and Point Cloud Compression, into different video editing and creation applications. Engage with the open-source community to contribute changes upstream to video player Open Source projects and assist in integrating LCEVC. Resolve defects within the codec integration layer and across More ❯

code through rigorous testing and code review processes. Contribute to cross-platform development (Windows, Linux, Android, iOS, Mac) using CMake. Utilize unit testing frameworks like GTest/Catch and open-source libraries such as Boost and OpenCV. Work with .NET Core and Restful API, and proficiency in scripting languages like Python. Implement complex object-oriented patterns, public interfaces … What We're Looking For: Proven experience in software development in a commercial environment. Strong proficiency in modern C++ development and cross-platform development. Familiarity with unit testing frameworks, open-source libraries, and code review processes. Working knowledge of .NET Core, Restful API, and scripting languages. Passion for problem-solving and a commitment to continuous improvement. Experience in More ❯

code through rigorous testing and code review processes. Contribute to cross-platform development (Windows, Linux, Android, iOS, Mac) using CMake. Utilize unit testing frameworks like GTest/Catch and open-source libraries such as Boost and OpenCV. Work with .NET Core and Restful API, and proficiency in scripting languages like Python. Implement complex object-oriented patterns, public interfaces … What We're Looking For: Proven experience in software development in a commercial environment. Strong proficiency in modern C++ development and cross-platform development. Familiarity with unit testing frameworks, open-source libraries, and code review processes. Working knowledge of .NET Core, Restful API, and scripting languages. Passion for problem-solving and a commitment to continuous improvement. Experience in More ❯

experience for both small projects and large monorepos. Stay abreast of industry trends and advancements in CI/CD technologies, bringing innovative ideas to the team. Engage with the open-source community, participate in discussions, and contribute to related projects, aligning with Vercel's commitment to giving back to the developer community. Write clean, efficient, tested, and well … If You: Are a React or Next.js expert. Have worked to develop a CI/CD platform for other developers to use. Have experience contributing to, or participating in open source projects. Benefits: Competitive compensation package, including equity. Inclusive Healthcare Package. Learn and Grow - we provide mentorship and send you to events that help you build your network More ❯

About Clearmatics Clearmatics is a blockchain protocol engineering company that builds decentralised financial market infrastructures that are more open, efficient, and resilient than those serving legacy market structures of today. We have a bold vision for this new market infrastructure - enabling market participants to solve currently unaddressed problems of the real economy, including "missing markets" problems. We aim to … intermediaries. We are building this new infrastructure in collaboration with incredible trading and blockchain communities. Clearmatics was founded in 2015, and we have ever since been committed advocates of Open Source development, and active participants in the blockchain and cryptography research communities. We've also been an active participant and supporter of decentralized infrastructure initiatives. We're looking … importance of careful design choices and can anticipate the impact of code changes on wider system behaviour. You can demonstrate a strong interest in blockchain and may even have open source contributions that you can highlight. You express yourself clearly in writing and in discussions. Responsibilities You will be involved at all stages of the development lifecycle for More ❯

About Clearmatics Clearmatics is a blockchain protocol engineering company that builds decentralised financial market infrastructures that are more open, efficient, and resilient than those serving legacy market structures of today. We have a bold vision for this new market infrastructure - enabling market participants to solve currently unaddressed problems of the real economy, including "missing markets" problems. We aim to … intermediaries. We are building this new infrastructure in collaboration with incredible trading and blockchain communities. Clearmatics was founded in 2015, and we have ever since been committed advocates of Open Source development, and active participants in the blockchain and cryptography research communities. We've also been an active participant and supporter of decentralized infrastructure initiatives. We're growing … and command-line tools Familiarity with CEX/DEX trade lifecycle and common DeFi protocols Excellent attention to detail and appreciation for software correctness Bonus Points Contributed code to open-source projects in the Web3 space Experience developing DeFi trading tools or frameworks Proficiency with Python scientific computing stack (NumPy, Pandas, Jupyter) Smart contract programming experience in Solidity More ❯