1 to 25 of 250 Open Source Jobs in London

Open Source Software License Engineering & Governance Lead 📍 Location: London or Hong Kong (Hybrid or Remote Options) 💼 Function: Technology/Engineering Governance 🕓 Employment Type: Permanent 💵 Up to £105k + Excellent Bonus, Holiday, Pension & Benefits This role will suit a Senior Technical Governance Manager or Engineering & Governance Lead to shape and lead enterprise-wide standards for OSS software usage, licensing … and technology enablement. A hybrid strategic and technical leadership role to build the company’s first Open Source Office, ensuring that open-source adoption across the enterprise remains secure, compliant, and scalable. The ideal candidate combines technical literacy, legal awareness, and cultural empathy — someone who can speak both to developers and lawyers in equal measure, and … lead the organization into a mature, regulated open-source future. Role Summary: You must have deep experience with OSS governance, control framework, risk model, and enablement scopes to lead how the organization uses, manages, and contributes to open-source software (OSS). The ideal candidate will be a Software engineer or technical manager (hands-on or More ❯

Open Source Software License Engineering & Governance Lead 📍 Location: London or Hong Kong (Hybrid or Remote Options) 💼 Function: Technology/Engineering Governance 🕓 Employment Type: Permanent 💵 Up to £105k + Excellent Bonus, Holiday, Pension & Benefits This role will suit a Senior Technical Governance Manager or Engineering & Governance Lead to shape and lead enterprise-wide standards for OSS software usage, licensing … and technology enablement. A hybrid strategic and technical leadership role to build the company’s first Open Source Office, ensuring that open-source adoption across the enterprise remains secure, compliant, and scalable. The ideal candidate combines technical literacy, legal awareness, and cultural empathy — someone who can speak both to developers and lawyers in equal measure, and … lead the organization into a mature, regulated open-source future. Role Summary: You must have deep experience with OSS governance, control framework, risk model, and enablement scopes to lead how the organization uses, manages, and contributes to open-source software (OSS). The ideal candidate will be a Software engineer or technical manager (hands-on or More ❯

junior-to-mid Legal Counsel to join a pivotal in-house team and support a business at the intersection of software development and AI, with a particular focus on open-source compliance and licensing. The Opportunity This newly created role reports directly to the General Counsel and offers the chance to provide practical, commercial legal advice across the … business, including to senior leadership. You will: Advise on commercial contracts, open-source licensing, and data processing agreements. Manage intellectual property and ensure data privacy compliance. Support product development to mitigate legal risk. Advise on disputes and emerging legal issues. Monitor trends in AI, technology law, and open-source compliance to provide actionable guidance. Hybrid role … based 3 days a week in the Central London office. Experience & Skills Qualified solicitor with 3+ PQE, experienced in drafting, reviewing, and negotiating commercial agreements. Experience with open-source software or licensing is highly desirable. In-house experience (current or via secondment) is advantageous. Commercially minded, confident, and able to manage competing priorities independently. Able to provide practical More ❯

junior-to-mid Legal Counsel to join a pivotal in-house team and support a business at the intersection of software development and AI, with a particular focus on open-source compliance and licensing. The Opportunity This newly created role reports directly to the General Counsel and offers the chance to provide practical, commercial legal advice across the … business, including to senior leadership. You will: Advise on commercial contracts, open-source licensing, and data processing agreements. Manage intellectual property and ensure data privacy compliance. Support product development to mitigate legal risk. Advise on disputes and emerging legal issues. Monitor trends in AI, technology law, and open-source compliance to provide actionable guidance. Hybrid role … based 3 days a week in the Central London office. Experience & Skills Qualified solicitor with 3+ PQE, experienced in drafting, reviewing, and negotiating commercial agreements. Experience with open-source software or licensing is highly desirable. In-house experience (current or via secondment) is advantageous. Commercially minded, confident, and able to manage competing priorities independently. Able to provide practical More ❯

Technical Architect - Data Products & Open Data 12-Month Contract Inside IR35 2 days a week on site in London Role Overview We are seeking an experienced Technical Architect to provide technical leadership for data products and open data services. This role requires a strong background in data product design, solution architecture, and open data platforms, with the … ability to lead multi-disciplinary teams and drive technical strategy across a large programme. Key Responsibilities Lead technical architecture and solution design for data products and open data services Provide design leadership across a multi-disciplinary team Apply expertise in data cataloguing, metadata management, and open/licensed data portals Leverage understanding of AI developments to shape and … enhance data services Work with open source tools and cloud infrastructure (AWS, Terraform) Guide technical direction and ensure consistent implementation across the programme Collaborate with a core team of 7-8 and a wider programme of 50 Essential Skills & Experience Proven experience with data products and open/licensed data portals Knowledge of data cataloguing systems and More ❯

leading global organisations — constantly pushing boundaries and finding smarter ways to deliver value. Innovation is at the heart of everything this team does. They explore the latest cloud platforms, open-source tools, and modern technologies to create solutions that are as inspiring as they are effective. You'll join a thriving community of specialists who take pride in … ensuring best practices and high standards throughout delivery. Contributing to proposals and client engagements, helping to define innovative and competitive solutions. Staying hands-on with modern cloud-native and open-source technologies, continually learning and exploring new ideas. This is an opportunity to influence outcomes at every level — guiding technology choices and shaping solutions that make a lasting … clearly, and enjoy seeing your designs come to life. Our client is looking for someone with: Strong, hands-on experience with AWS and building cloud-native solutions. Expertise in open-source frameworks , API-led design , and secure, scalable architectures. A deep understanding of microservices , domain-driven design , event-driven systems , and containerisation . Familiarity with architectural frameworks such More ❯

skills, with the ability to guide small, inexperienced client teams in a collaborative yet authoritative manner. You will play a key role in shaping and delivering solutions built on open-source technologies, data pipelines, vector stores, and Generative AI (GenAI) capabilities, with an emphasis on integrating Large Language Models (LLMs). Key Responsibilities Leadership & Collaboration: Lead and mentor … non-technical audiences. Build strong relationships with client stakeholders, ensuring alignment on objectives and expectations. Technical Delivery: Design, implement, and document end-to-end data and GenAI solutions using open-source and cloud-based components. Develop and maintain data pipelines, vector databases, and LLM integrations. Configure and optimize solutions on Microsoft Azure Cloud. Ensure adherence to best practices … Required Skills & Experience Proven ability to lead small technical or client teams. Excellent communication and presentation skills. Strong team player with a collaborative, mentoring mindset. Hands-on experience with open-source technologies across front-end and back-end systems. Proficiency in data pipelines, vector stores, and Generative AI/LLM implementations. Working knowledge of Microsoft Azure Cloud services More ❯

days per week in office) Maze is partnering with a stealth-mode startup that's rebuilding core banking from the ground up. They’re creating the world’s first open-source, AI-native "Thin Ledger"—set to replace legacy infrastructure at Tier 1 banks. We're looking for a Principal Platform Engineer to drive the infrastructure behind mission … incident response AI-curious or AI-native: excited to build agent-powered ops Someone who is currently hands on (not someone primarily focused on strategy & people management) Passion for open-source, clean architecture Software Development experience (Bonus points for Go(Golang)) Bonus: background in financial systems, core banking, or regulated infra Why join: Huge ownership: build core infra … Work with a high-caliber team, fast-paced and product-minded founders who have worked in some of the most recognised tech businesses in the world. Help define an open-source platform from day one. Clear path to tech unicorn status with fruitful equity included. Recently raised 8 figures in funding. If your skillset matches, apply within. Please More ❯

days per week in office) Maze is partnering with a stealth-mode startup that's rebuilding core banking from the ground up. They’re creating the world’s first open-source, AI-native "Thin Ledger"—set to replace legacy infrastructure at Tier 1 banks. We're looking for a Principal Platform Engineer to drive the infrastructure behind mission … incident response AI-curious or AI-native: excited to build agent-powered ops Someone who is currently hands on (not someone primarily focused on strategy & people management) Passion for open-source, clean architecture Software Development experience (Bonus points for Go(Golang)) Bonus: background in financial systems, core banking, or regulated infra Why join: Huge ownership: build core infra … Work with a high-caliber team, fast-paced and product-minded founders who have worked in some of the most recognised tech businesses in the world. Help define an open-source platform from day one. Clear path to tech unicorn status with fruitful equity included. Recently raised 8 figures in funding. If your skillset matches, apply within. Please 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 ❯

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 ❯

enjoy solving complex challenges, we would love to hear from you. Nice to have: Publications: At top-tier ML/CV/NLP conferences (NeurIPS, ICML, ICLR, CVPR, ICCV) Open-source: Contributions to and experience in open-source projects. Startup experience: Experience with a startup work environment and wider ecosystem. Why join us? Work in an More ❯

enjoy solving complex challenges, we would love to hear from you. Nice to have: Publications: At top-tier ML/CV/NLP conferences (NeurIPS, ICML, ICLR, CVPR, ICCV) Open-source: Contributions to and experience in open-source projects. Startup experience: Experience with a startup work environment and wider ecosystem. Why join us? Work in an More ❯

enjoy solving complex challenges, we would love to hear from you. Nice to have: Publications: At top-tier ML/CV/NLP conferences (NeurIPS, ICML, ICLR, CVPR, ICCV) Open-source: Contributions to and experience in open-source projects. Startup experience: Experience with a startup work environment and wider ecosystem. Why join us? Work in an More ❯

enjoy solving complex challenges, we would love to hear from you. Nice to have: Publications: At top-tier ML/CV/NLP conferences (NeurIPS, ICML, ICLR, CVPR, ICCV) Open-source: Contributions to and experience in open-source projects. Startup experience: Experience with a startup work environment and wider ecosystem. Why join us? Work in an More ❯

tasks. Collaboration and communication: Excellent interpersonal and communication skills, with technical and non-technical stakeholders. Nice to have: Visual design: Background in graphic design and/or visual arts. Open-source: Contributions to and experience in open-source projects. Startup experience: Experience with a startup work environment and wider ecosystem. Why join us? Work in an More ❯

tasks. Collaboration and communication: Excellent interpersonal and communication skills, with technical and non-technical stakeholders. Nice to have: Visual design: Background in graphic design and/or visual arts. Open-source: Contributions to and experience in open-source projects. Startup experience: Experience with a startup work environment and wider ecosystem. Why join us? Work in an More ❯

enable researchers, engineers, and investment teams to access and analyse data at scale. You’ll join a small, highly capable team operating in a cloud-native, Kubernetes environment, combining open-source tools and modern engineering practices to create a unified, next-generation data platform. What You’ll Get A key engineering role within a world-class technology organisation … that values innovation and impact. Exposure to a modern data ecosystem including Iceberg, Kafka, Airflow, and other open-source technologies. A collaborative, intellectually curious culture where engineers are trusted to take ownership and drive outcomes. Excellent compensation package with strong performance incentives. What You’ll Do Design, develop, and maintain high-performance APIs and core data service s More ❯

enable researchers, engineers, and investment teams to access and analyse data at scale. You’ll join a small, highly capable team operating in a cloud-native, Kubernetes environment, combining open-source tools and modern engineering practices to create a unified, next-generation data platform. What You’ll Get A key engineering role within a world-class technology organisation … that values innovation and impact. Exposure to a modern data ecosystem including Iceberg, Kafka, Airflow, and other open-source technologies. A collaborative, intellectually curious culture where engineers are trusted to take ownership and drive outcomes. Excellent compensation package with strong performance incentives. What You’ll Do Design, develop, and maintain high-performance APIs and core data service s More ❯

About our Core Technology Team AISI 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. As a software engineer on one of … 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 … Register. The Civil Service Code (opens in a new window) sets out the standards of behaviour expected of civil servants.We recruit by merit on the basis of fair and open competition, as outlined in the Civil Service Commission's recruitment principles (opens in a new window) .The Civil Service embraces diversity and promotes equal opportunities. As such, we run More ❯

Founded in 2023, the company has already secured significant early-stage funding, including a $10m Seed round in 2024. The founding team is composed of ex-Palantir and ex-Open AI leaders. They combine deep sector knowledge with cutting-edge design and software engineering expertise to deliver state-of-the-art SaaS capabilities leveraging NLP, Generative AI, and reinforcement … or equivalent experience 5+ years of experience working with cross-functional software development teams Experience shipping and iterating on production-grade software components professionally and/or in the open-source community Ability to write robust, well tested, and well-designed code that frequently gets deployed to users Strong understanding of product development and navigating large codebases Located … in London/Paris and open to working in office Tech Stack: Python FastAPI Typescript + React Open source LLMs On premise deployments Benefits Currently Offered (likely to improve as company grows): 100% coverage for travel expenses Childcare support Min. 3 months fully paid parental leave 25 days holiday + bonus days for company closure Subsidised lunches More ❯

Founded in 2023, the company has already secured significant early-stage funding, including a $10m Seed round in 2024. The founding team is composed of ex-Palantir and ex-Open AI leaders. They combine deep sector knowledge with cutting-edge design and software engineering expertise to deliver state-of-the-art SaaS capabilities leveraging NLP, Generative AI, and reinforcement … or equivalent experience 5+ years of experience working with cross-functional software development teams Experience shipping and iterating on production-grade software components professionally and/or in the open-source community Ability to write robust, well tested, and well-designed code that frequently gets deployed to users Strong understanding of product development and navigating large codebases Located … in London/Paris and open to working in office Tech Stack: Python FastAPI Typescript + React Open source LLMs On premise deployments Benefits Currently Offered (likely to improve as company grows): 100% coverage for travel expenses Childcare support Min. 3 months fully paid parental leave 25 days holiday + bonus days for company closure Subsidised lunches More ❯

healthcare assessments are understood and utilized. Founded by health economics academics and backed by leading investors, we are building a novel, data-driven platform that will become the definitive source of intelligence for Health Technology Assessment (HTA) and Market Access (MA) reports globally. This is a rare opportunity to get in on the ground floor and play a pivotal … to support our evolving data schema. LLM Experimentation & Deployment: Rapidly experiment with and implement LLM-based solutions (from prompt engineering with state-of-the-art APIs to fine-tuning open-source models) to extract, consolidate, and categorise key variables from complex text. Human-in-the-Loop System Design: Design and implement the frameworks and tools that facilitate efficient … web-scraping with BeautifulSoup, Scrapy, or Selenium), data wrangling, model development, and evaluation. Demonstrable experience experimenting with and deploying applications using Large Language Models (e.g., via OpenAI, Anthropic, or open-source models via Hugging Face). Experience building and maintaining data pipelines and a comfort with software engineering best practices (version control, CI/CD, testing). Exceptional More ❯

an advanced tech stack to shape the future of our industry. Our Data Platform operates seamlessly across multi-cloud environments, leveraging both AWS and GCP. Built on the latest open-source technologies, it allows us to not only push the boundaries of data engineering and analytics but also contribute back to the open-source community through More ❯

the core C++ codec integration layers. Integration work for other compression solutions, such as VC6 and point cloud compression, into different video editing and creation applications. Engaging with the open-source community to contribute changes upstream to video player open-source projects and assist with their integration of LCEVC. Development activity planning, including sprint planning and More ❯