1 to 25 of 101 Open Source Jobs in London

The Company Our client is one of the fastest-growing software companies in Europe and is the publisher of a popular Open-Source operating system. Their aim is to help the enterprises welcome open source from end to end, across every category of compute and application, starting with infrastructure solutions such as Kubernetes, OpenStack, Data Analytics … an established supplier to many of the world's top Telecoms Service Provider's like BT and AT&T and their use cases span 5G Core, 5G Edge and Open RAN. The Opportunity In this hunter sales role. The qualified candidate will have the responsibility to attain the given annual quota. You are expected to successfully prospect accounts for … new business, sustain an existing territory, and work with colleagues on account strategy. You must be easily selling open source, cloud, virtualization, and technical software solutions to all levels of the enterprise. Key Responsibilities: Surpass annual and quarterly bookings target for services and subscriptions Yearly bookings goal $1.5 million + Represent the company, its software and solutions, for More ❯

the core of our platform: our distributed database engine, integrated AI capabilities, and high-availability solutions. This role sits at the intersection of distributed systems, OLTP, high availability, and open-source innovation. You will contribute to the product direction for our scalable distributed architecture, our core MariaDB-based OLTP server, and our synchronous high-availability offerings powered by … of the developer and the enterprise architect, translating complex challenges into a product roadmap that pushes the boundaries of what a database can do. You will collaborate with the open-source community and provide key product support for our core MariaDB-based OLTP server. Your work will empower organizations worldwide to build resilient, high-performance applications. Key Responsibilities … content, product demos, and sales enablement materials that clearly articulate our value proposition. Community & Ecosystem Collaboration: Serve as a technical product expert. Collaborate with developer relations to support our open-source community, gathering feedback and representing their needs to inform the product roadmap. Cross-Functional Alignment: Ensure alignment across engineering, marketing, sales, and support, communicating progress and dependencies 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 ❯

RAG Systems ( Security Clearance Essential ) 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 ❯

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 ❯

the user experience, drive product growth, establish best practices, and integrate cutting-edge AI capabilities. ️ Your responsibilities Design and develop robust and scalable generative AI services using Python and open source frameworks such as Writer Agent Builder, LangChain, and n8n. Implement responsive and user-friendly frontend interfaces, leveraging technologies like React, TypeScript, and modern web frameworks. Work with … databases as Elastic, Pinecone, Weaviate, or similar. Familiarity with cloud platforms (AWS, GCP, etc.) and containerized environments (Docker, Kubernetes). Familiarity with MCP, devtools, AI agents, or contributed to open source You are committed to writing clean, maintainable, and scalable code, following best practices in software development. You enjoy solving complex problems and continuously improving the performance and … closely with cross-functional teams to build impactful features. Proven ability to help teams adopt technical best practices. Note: . 5 years experience is minimum experience, but we are open to seniority (Senior, Staff, Senior Staff, etc). Benefits & perks (UK full-time employees): Generous PTO, plus company holidays Comprehensive medical and dental insurance Paid parental leave for all More ❯

Overview stackable - who are we? Stackable is an innovative technology company focused on delivering cutting-edge, opensource Big Data solutions for data lakehouses, data mesh, event processing and AI. We specialise in designing, deploying, and managing scalable datainfrastructures that empower businesses to harness the power of data effectively. Our core product, the Stackable Data Platform, enables companies of all sizes … 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 ❯

Design, develop, deploy, monitor, and fix the data services and pipelines you build. Contribute to the development of pipelines and services that ingest, transform, and expose multilingual, multi-format open-source data. Work cross functionally with product managers, data scientists, investigators, and sanctions experts, translating fuzzy problems into clean, testable code. REQUIRED QUALIFICATIONS: 3-6+ years of … Docker, Kubernetes, and implementing CI/CD pipelines for data workflows. Familiarity with graph databases such as Neo4j, Memgraph, or a triple store Search experience, particularly in tools like Open/ElasticSearch, Lucene, Vector search (Pinecone, postgres Vectors, etc) to support complex data relationships and querying needs. Kharon is a highly disruptive and incredibly innovative organization that navigates risk … businesses perceive and navigate global risks. Reporting to the Data Engineering Manager , this Software Engineer will support and enhance the reliability of our research and analysis platform, which leverages open-source intelligence, data mining, network analysis, and machine learning to generate unparalleled insights on networks engaged in illicit financial activity. Key focus areas include system architecture, code quality More ❯

responsibilities Define and champion the technical strategy for services, ensuring alignment with user needs and business goals Lead technical specialists across multiple projects, solving architectural challenges. Design and assure open-source, user-centred systems in agile environments. Own the technical design and evolution of services, including integration and interoperability. Provide technical governance and present designs to boards such … governance boards and ensuring alignment with standards. Previous or current experience developing web services using Python/Django and/or NodeJS/React with knowledge of cloud technologies, open-source technologies and secure system design. Proven leadership in guiding technical teams, delivering user-focused services in agile environments and communicating complex concepts to varied stakeholders. Desirable skills 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 ❯

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. What you … relationships with a highly technical client base, including operations, low-latency developers, and systematic trading experts. Automate processes to reduce manual work required by support teams using enterprise and open-source tools. Test and analyze vendor products for selective use in production systems. Serve as the escalation point for support teams on priority issues. Document and create Standard 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. What you … relationships with a highly technical client base, including operations, low-latency developers, and systematic trading experts. Automate processes to reduce manual work required by support teams using enterprise and open-source tools. Test and analyze vendor products for selective use in production systems. Serve as the escalation point for support teams on priority issues. Document and create Standard More ❯

the reliability and stability of the SDK. Collaborate with cross-functional teams, including product managers, designers, and infrastructure experts, to address challenges and deliver exceptional results. 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. Actively gather feedback from developers and … use it to drive continuous improvement and innovation in the AI SDK. About You: You have at least 5+ years of relevant experience Experience contributing to or participating in open source projects Excellent communication skills and the ability to work effectively in a collaborative team environment Competitive compensation package, including equity. Learn and Grow - we provide mentorship and More ❯

design and architecture of core systems. Collaborate with cross-functional teams including product, research, and security Write clean, testable, and maintainable code, ensuring scalability and reliability Engage with the open-source and blockchain developer community Key Requirements Strong commercial experience with Rust (production-level) Deep understanding of systems programming, memory management, and concurrency Experience with distributed systems Enthusiasm … for crypto, Web3, and open-source development Excellent communication skills and ability to work in a collaborative hybrid team More ❯

hiring managers to deeply understand team needs, technical requirements, and ideal candidate profiles. Proactively identify and engage passive candidates through innovative sourcing methods-including GitHub, GoogleScholar, Stack Overflow, arXiv, open-source communities, tech events, and bespoke search strategies. Experiment with and implement new sourcing tools, outreach methods, and engagement tactics to increase pipeline quality and diversity. Act as … talent globally. A strategic mindset with a proactive approach to talent discovery-you don't wait for reqs to get started. Expertise in sourcing beyond LinkedIn (e.g. GitHub, Kaggle, open-source projects, technical blogs, conferences, custom Boolean strings). Strong communication and storytelling skills-you know how to craft compelling outreach messages that resonate with technical candidates. Ability … a great culture while still providing flexibility to work from home. We expect employees to be in the office at least three days per week. We have a radically open and accepting culture at Intercom. We avoid spending time on divisive subjects to foster a safe and cohesive work environment for everyone. As an organization, our policy is to More ❯

Bitcoin, and Zcash and has pioneered a completely new, next-generation blockchain protocol with Polkadot and the framework it's built with, Substrate. Parity is passionate about building the open-source technologies needed to power an unstoppable, decentralised web -known as Web3- and helps developers and organisations implement and build upon the Web3 tech stack. People in our … in a relatively new industry and an uncertain regulatory environment Prior knowledge of blockchain would be an advantage, however an interest in and a desire to learn about blockchain, open source and decentralised systems will be the key to success in this role About working for us Competitive remuneration packages based on iterative market research, including tokens (where … everyone in our collective feeling included and welcome. View our Applicant Notice to see how we use your data. Is this position not quite your match? Browse our other open roles. More ❯

intensive work for both OLTP and OLAP use cases. Our environments are primarily cloud-native spanning AWS, Azure and GCP, but we also work on systems running self-hosted open source services exclusively. We strive towards a strong code-first, data as a product mindset at all times, where testing and reliability with a keen eye on performance More ❯

communication skills to explain technical concepts to both technical and non-technical audiences Ability to conduct technical workshops, training sessions, knowledge-sharing initiatives, and contribute to technical articles or open source projects; provide guidance and mentorship to teams, partners, and customers Amazon is an equal opportunities employer. We believe passionately that employing a diverse workforce is central to More ❯

discoveries about human health and diseases. So future generations can live in good health for longer. Requirements Technical skills Knowledge and experience of building cloud-hosted backend services using open source technologies in a start-up or scale-up environment, ideally using Python, though equivalent experience is welcome. Knowledge and experience of building backend systems for data movement More ❯

facing off to cyber security specialists. The successful candidate will meet all of the following essential criteria: Demonstrable experience in designing large scale cloud migration projects/programmes with open source and commercial software within AWS, Azure, GCP or hybrid Experience in operating within a multi-disciplined team and clearly communicating complex technology solutions to technical and non … CD and Infrastructure-as-Code Understanding of NCSC Cloud Security Principles and its practical implementations Aker Systems Attributes At Aker we work as a team, we are collaborative, hardworking, open, and delivery obsessed. There is no blame culture here: try things, and take responsibility for the outcomes. You are always part of the wider Aker. We help out our More ❯

infrastructure architecture is a plus. Understanding of modern authentication protocols such as OAuth2 and OIDC. Consideration of cross-cutting concerns like observability and security in infrastructure design. Contributions to Open Source projects are a plus. As an equal opportunity employer we welcome applications that reflect the diversity of our wider community. Please let us know at any time … being a nice person Truly flexible working hours - school pick up, volunteering, gym - no problem Generous leave - 27 days’ holiday plus bank holidays and enhanced family leave Transparent and open culture - you will be listened to and heard More ❯

platform changes, with a focus on developer experience. - In-depth experience of designing solutions to complex technical problems independently. Desirable: experience designing/implementing Docker images and prototyping with open-source components. Benefits - Civil Service pension with average employer contribution of 28.97% - 25 days annual leave, rising to 30 with service - Hybrid/flexible working (2-3 days More ❯

security in line with ISO27001 and Cyber Essentials Plus Development and maintenance of AI system focused on intelligence analysis and processing Development and maintenance of the data repositories, including source, geospatial and open-source intelligence Liaise with client stakeholders within various defence organisations Requirements: understand how to apply it to improve client operations, specifically situational awareness and More ❯

security in line with ISO27001 and Cyber Essentials Plus Development and maintenance of AI system focused on intelligence analysis and processing Development and maintenance of the data repositories, including source, geospatial and open-source intelligence Liaise with client stakeholders within various defence organisations Requirements: understand how to apply it to improve client operations, specifically situational awareness and More ❯