26 to 50 of 1,228 Permanent Open Source Jobs

Developer Relations Engineer (London, UK)

Location
Greater London, England, United Kingdom
others, this is the role for you.Why This Role MattersSupabase is growing fast with 350,000+ developers, 1,000+ OSS contributors, and a thriving open source ecosystem. Our users are builders, startup founders, weekend hackers, and engineers scaling to millions of users. DevRel is how we meet them … where they are: through content, community, and code.We're building a community of communities that brings together developers from many backgrounds, including first-time open source contributors. As a DevRel Engineer, you'll be a bridge between Supabase and the broader developer ecosystem, helping people get started ...

Senior Software Backend Engineer, Foundations

Location
United Kingdom
role-based access control).-Experience with Kubernetes and container orchestration.-Experience with network management or infrastructure software (for example, NetBox).-Open-source contributions or project involvement.About NetBox Labs:NetBox Labs helps companies build and manage complex networks. We help customers accelerate network automation by delivering open, composable products and supporting the network automation community.NetBox Labs is the commercial steward of open source NetBox, the world’s most popular network source of truth, and Orb, the next-generation open source network observability platform. Our products include NetBox Enterprise, a fully supported ...

Staff Software Backend Engineer, Tech Lead - Foundations

Location
United Kingdom
making technical decisions under ambiguity.Nice to Have:-Experience with Kubernetes and container orchestration.-Experience with network management or infrastructure software (for example, NetBox).-Open-source contributions or project involvement.-Comfort with AI-enhanced tooling (for example, Copilot, ChatGPT, Cursor).Join NetBox Labs. Help build the identity … platform relies on.About NetBox Labs:NetBox Labs helps companies build and manage complex networks. We help customers accelerate network automation by delivering open, composable products and supporting the network automation community.NetBox Labs is the commercial steward of open source NetBox, the world’s most popular network source ...

Commercial • London • Full time • On-site

Location
Greater London, England, United Kingdom
leading European investors. We work with global enterprises across hardware and consumer AI that are building the next generation of voice‐enabled products. Our open source models have been downloaded over 4 million times and earned over 6,500 GitHub stars since launch. Our vision is a world … build the top of our enterprise pipeline, working side by side with our founders and sales team. Our go‐to‐market runs from open source to enterprise. Developers find and build on our open models, and the companies they work for need production‐grade, supported versions ...

Public Sector Account Executive (Education)

Location
Greater London, England, United Kingdom
usage-based pricing, and modern data architectures. Solve Complex Problems: Move beyond simple transactions to address the intricate data challenges our customers face. Champion Open Source: Articulate the value of our advanced commercial features while advocating for our Open-Source offerings. Identify New Use Cases: Showcase … date. Ability to create alignment across teams to accelerate deals. AI Mindset: Use new technologies for performance advantage and deal structuring. Open-Source Appreciation: Enthusiasm for the Open-Source model and the community relying on our solutions. Additional Information - We Take Care of Our People ...

Mid Market Account Executive

Location
United Kingdom
usage-based pricing, and modern data architectures. Solve Complex Problems: Move beyond simple transactions to address the intricate data challenges our customers face. Champion Open Source: Articulate the value of our advanced commercial features while advocating for our Open-Source offerings. Identify New Use Cases: Showcase … date. Ability to create alignment across teams to accelerate deals. AI Mindset: Use new technologies for performance advantage and deal structuring. Open-Source Appreciation: Enthusiasm for the Open-Source model and the community relying on our solutions. Additional Information - We Take Care of Our People ...

Remote Product Manager - Open Source & AI Platforms

Location
Greater London, England, United Kingdom
Canonical is seeking product managers for open source software leadership roles. Roles are home-based across the EMEA time zone, with opportunities to influence Ubuntu and related Open Source initiatives. You will drive strategy, roadmap, and execution while collaborating with engineering, design, marketing, and sales teams … deliver high-impact products. Ideal candidates possess strong academic records, Linux/open source understanding, and experience guiding multiple projects across diverse #J-18808-Ljbffr ...

Senior Software Engineer, Code Search

Location
United Kingdom
part of our Copilot Agents organization, positively impacting millions of software developers and AI agents around the world who are building everything from open source to global enterprises. We are looking for creative problem solvers and diverse thinkers, people who care about culture as well as customers … GitHub is the world’s leading AI-powered developer platform with 150 million developers and counting. We’re also home to the biggest open-source community on earth (and 99% of the world’s software has open-source code in its DNA). Many ...

System Engineer (Lab) — Generalist, Customer-Facing

Location
Macclesfield, England, United Kingdom
Biosecure ID supports Science for Social Good CIC ( https://ssg-cic.org ), a UK-based non-profitcompany dedicated to advancing applied genetics through open-source softwaredevelopment (AGOSS® Platform), developing vocational training programmes incountries where knowledge gaps are most visible, raising awareness andeducation about DNA testing, standardizing sexual … clinical/CLIA-adjacent workflows. Experience building autonomous or semi-autonomous systems — closed-loop control, sensor fusion, or decision-making pipelines. Contributions to open-source projects (lab automation, robotics, or bioinformatics tooling especially relevant). Startup or small-team experience where you had to do more than your ...

Research Scientist (Control)

Location
Greater London, England, United Kingdom
safety, agent failures, and detection methodologies Stay current with research into coding security and safety vulnerabilities Fine-tuning & Monitor Development Fine-tune open-source models to create efficient monitors for high-volume production environments Design and build agentic monitoring systems that autonomously investigate logs to identify both known … iterating based on empirical findings e.g. prompting, scaffolding, agent design, fine-tuning, or RL Strong Python programming skills Demonstrated ability to work independently on open-ended research problems Good-to-haves Familiarity with AI safety concepts, particularly agent-related risks Familiarity with computer security, e.g. security testing and secure ...

AI Engineer

Location
Greater London, England, United Kingdom
Agentic AI solutions that enhance customer experiences, improve operational efficiency, and accelerate business innovation. You will work with cutting-edge technologies including Google Gemini, Open-Source Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), Agent Development Kits (ADK), Model Context Protocol (MCP), and Google Cloud Platform (GCP). … while remaining at the forefront of AI innovation. Key Responsibilities Design, develop, and implement scalable Generative AI and Agentic AI solutions using Gemini and Open-Source LLMs. Build and optimise RAG-based applications leveraging enterprise knowledge sources and vector search technologies. Develop AI-powered APIs, microservices, and reusable ...

Senior Software Engineer (vLLM)

Location
Cambridge, England, United Kingdom
funding in order to design, build and deploy innovative AI systems. The Opportunity We are seeking a Senior Software Engineer with a passion for open-source AI infrastructure to work on deploying, extending and optimising vLLM (and potentially other inference serving engines) to support our projects. You will … places a major emphasis on using LLMs, AI coding assistants, and autonomous agents for software development. What You'll Do Deploy, instrument and monitor open weight models served using vLLM. Implement new features within vLLM to support novel hardware architectures as part of the Scaling Inference Lab. Work with ...

General Counsel

Location
Douglas, Northern Ireland, United Kingdom
held with the intention to list on a public exchange. We’re looking for someone with genuine fluency in the software industry and in open source dynamics, who can translate that insight into clear positions on licensing, commercial contracts and risk, and hands‐on execution. Reporting directly … contracting framework: standard templates, negotiating positions, and a deviation and escalation process that makes commitments visible before they are signed. Leading intellectual property and open source licensing strategy, including copyleft, trademark and the terms on which Ubuntu and our products are distributed. Owning the global compliance programme: data ...

General Counsel (Office based)

Location
Greater London, England, United Kingdom
held with the intention to list on a public exchange. We’re looking for someone with genuine fluency in the software industry and in open source dynamics, who can translate that insight into clear positions on licensing, commercial contracts and risk, and hands-on execution. Reporting directly … contracting framework: standard templates, negotiating positions, and a deviation and escalation process that makes commitments visible before they are signed. Leading intellectual property and open source licensing strategy, including copyleft, trademark and the terms on which Ubuntu and our products are distributed. Owning the global compliance programme: data ...

ML Systems Engineer - Model Training and Infrastructure (SWE-focused LLMs)

Location
Greater London, England, United Kingdom
existing architectures, follow established patterns and produce software that engineers can actually maintain. We develop our agent tooling entirely in-house and post-train open-source models for reliable, enterprise-grade coding performance. Our products are designed for on-premise, VPC and fully air-gapped environments, including security … development tools. Develop custom PyTorch dataloaders, training objectives and evaluation workflows. Run and analyse fine‐tuning and RL experiments across large, modern open‐source models. Create the data that teaches models to engineer Develop synthetic data‐generation pipelines for future RL and fine‐tuning runs. Design systems ...

Senior Applied AI Engineer: Software

Location
Manchester, England, United Kingdom
building an engineering organisation for the next generation of AI. You'll work with modern AI technologies, strong software engineering practices and open-source tools, while having dedicated opportunities for R&D, learning and contributing back to the wider technical community. We value strong engineering foundations, a drive … Work at the frontier of Applied AI: Build with rapidly evolving AI technologies and help determine how they should be used in production, leveraging Open Source solutions when needed and delivering AI with impact for our clients. Work that has real impact: Work directly with varied organisations solving ...

Infrastructure Support Engineer - Cambridge

Hiring Organisation
Microtech Global Ltd
Location
Cambridgeshire, East Anglia, United Kingdom
Employment Type
Permanent
Salary
£80,000
compact but unusually broad infrastructure footprint that supports hardware design, security verification, FPGA-based testing, CI/CD for silicon projects, and collaborative open-source workflows. This is a fantastic opportunity for a junior to mid-level engineer who thrives on learning new technologies quickly and enjoys making … across declarative infrastructure, zero-trust networking, hybrid cloud/on-prem Kubernetes, and custom toolingwhile contributing directly to the productivity of engineers building foundational open-source silicon. Key Responsibilities Help maintain and troubleshoot our on-prem Kubernetes cluster, powering hardware simulation, verification, and test workloads Support our Nebula ...

Technical Project Manager

Location
United Kingdom
About lowRISC lowRISC CIC is a non-profit Community Interest Company, collaborating with international engineering partners to create and maintain open source silicon designs, firmware and tools. This includes lowRISC’s flagship OpenTitan project - the largest open source silicon project in the world. Through projects like … based in our Cambridge office, working closely with both our technical teams and major commercial semiconductor partners to coordinate the delivery of high-quality open source silicon designs, firmware, and tools. Key responsibilities Plan, track, and manage complex subsystem and chip design projects for major commercial customers. Apply ...

Commercial Account Executive (French Speaker)

Location
Greater London, England, United Kingdom
real world, helping developers move from prototypes to production-ready AI agents that teams can rely on. We began as widely adopted open-source tools and have grown to also offer a platform for building, evaluating, deploying, and operating agents at scale. With $125M raised at Series … contributions can shape how this technology shows up in the real world. Today, our platform includes LangSmith (Observability, Evaluation, Deployment, Fleet, and Sandboxes), our open source frameworks (LangChain, LangGraph, and Deep Agents), and the newly launched LangSmith Engine for autonomous agent improvement. We have 100M+ monthly open ...

Technical Account Manager (UK, EMEA)

Location
Greater London, England, United Kingdom
Socket helps devs and security teams ship faster by cutting out security busywork. Thousands of orgs use Socket to safely find, audit, and manage open source code. Our customers - from Anthropic to xAI, and Figma to Vercel - love Socket (just check out their tweets) to see for yourself … Founded by Feross Aboukhadijeh, a long-time open source maintainer with software downloaded over a billion times a month, Socket has raised $125M from top angels, operators, and security leaders. About the Role You’ll own customer success post-sale for our European Customers. That means understanding ...

Design Engineer

Location
Greater London, England, United Kingdom
About Trigger.dev Trigger.dev is an open source platform used by developers to build production-grade AI agents. It's an SDK and the infrastructure to run agents reliably at scale, so teams can focus on the product instead of the plumbing. Our Cloud product is a managed service … fast and iterating in public If you're based in the UK and you are able to join the team in London Contributed to open source projects Previously been a venture-backed startup founder Have a social media presence About the team We are a small team with ...

Senior Software Engineer, Security Assurance | UK | Remote

Location
United Kingdom
fully managed observability platform trusted by more than 10,000 organizations to ensure reliability, resolve incidents faster, and optimize telemetry at scale. Built on open source and open standards and designed for interoperability across any stack, Grafana Cloud brings AI to observability and observability to AI, giving … Learn more at grafana.com and follow us on LinkedIn and X. We’re scaling fast and staying true to what makes us different: an open-source legacy, a global collaborative culture, and a passion for meaningful work. Our team thrives in an innovation-driven environment where transparency, autonomy ...

Senior Software Engineer, Security Assurance | Sweden | Remote

Location
United Kingdom
fully managed observability platform trusted by more than 10,000 organizations to ensure reliability, resolve incidents faster, and optimize telemetry at scale. Built on open source and open standards and designed for interoperability across any stack, Grafana Cloud brings AI to observability and observability to AI, giving … more at grafana.com and follow us on LinkedIn and X . We’re scaling fast and staying true to what makes us different: an open-source legacy, a global collaborative culture, and a passion for meaningful work. Our team thrives in an innovation-driven environment where transparency, autonomy ...

Engineering Manager - Observability | UK | Remote

Location
United Kingdom
fully managed observability platform trusted by more than 10,000 organizations to ensure reliability, resolve incidents faster, and optimize telemetry at scale. Built on open source and open standards and designed for interoperability across any stack, Grafana Cloud brings AI to observability and observability to AI, giving … Capital. Learn more at grafana.com and follow us on LinkedIn and X.We’re scaling fast and staying true to what makes us different: an open-source legacy, a global collaborative culture, and a passion for meaningful work. Our team thrives in an innovation-driven environment where transparency, autonomy ...

ML Engineer/Researcher Engineering London

Location
Greater London, England, United Kingdom
that reflect real personal-finance tasks and make model strengths and failure modes clear. Second, we will train our own models on top of open source, tuned for financial advice and evaluated against standards we care about: numerical correctness, rule-following, and robustness on long, messy inputs. … evals for personal-finance guidance and advice, including numerical accuracy, constraint satisfaction, and long-document robustness. Model building. Fine-tune, distill, and post-train open models into Clove models for financial advice. Research. Investigate why models fail on numbers and layered rules, and turn those findings into methods that ...