151 to 175 of 232 Open Source Jobs in London

clean, maintainable, and thoroughly tested code 🎓 STEM degree in Computer Science, Software Engineering, Mathematics, or related fields Why This Role Stands Out 💻 Engineering-first culture leveraging modern technologies and open-source tools 🚀 Fast-paced growth environment with opportunities to learn from industry leaders 📈 Real impact — your code powers live trading in high-stakes financial markets 🤝 Flat, agile team More ❯

and qualifications you need Strong proficiency in Python, particularly for AI/ML, data engineering, or automation use cases Experience working with or building applications around large language models (open-source or commercial) Familiarity with LLM agents, orchestration frameworks (e.g. LangGraph, LangChain), and context management Experience with cloud platforms (AWS preferred) and associated services for AI workloads A More ❯

and qualifications you need Strong proficiency in Python, particularly for AI/ML, data engineering, or automation use cases Experience working with or building applications around large language models (open-source or commercial) Familiarity with LLM agents, orchestration frameworks (e.g. LangGraph, LangChain), and context management Experience with cloud platforms (AWS preferred) and associated services for AI workloads A More ❯

and strong communication skills Must have start-up/Scale-up experience and understand this isn’t your typical 9-5 Desirable skills: Exposure to firmware engineering Contributions to open-source projects Mobile SDKs (iOS/Android) The salary for this role is up to £60,000 maximum, plus generous equity. More ❯

and strong communication skills Must have start-up/Scale-up experience and understand this isn’t your typical 9-5 Desirable skills: Exposure to firmware engineering Contributions to open-source projects Mobile SDKs (iOS/Android) The salary for this role is up to £60,000 maximum, plus generous equity. More ❯

your work to serve a broad range of users Nice to have, but not essential: Experience designing reporting tools for SaaS, legal tech, or data-rich platforms Experience using open source data visualisation tools Knowledge of accessibility and inclusivity principles in data design Experience of working with market research data, especially within professional services or legal Familiarity with More ❯

Certifications: Azure Solutions Architect Expert, CISSP, or equivalent. • Experience with AI policy bodies, standards organizations, or government advisory panels. • Familiarity with cross-border data flows, emerging AI regulations, and open-source AI projects. Behavioral Competencies • Strategic Visionary: Anticipates AI trends, shapes long-term roadmaps, and aligns technology with business goals. • Executive Collaborator: Builds trust at board level and More ❯

Certifications: Azure Solutions Architect Expert, CISSP, or equivalent. • Experience with AI policy bodies, standards organizations, or government advisory panels. • Familiarity with cross-border data flows, emerging AI regulations, and open-source AI projects. Behavioral Competencies • Strategic Visionary: Anticipates AI trends, shapes long-term roadmaps, and aligns technology with business goals. • Executive Collaborator: Builds trust at board level and More ❯

Certifications: Azure Solutions Architect Expert, CISSP, or equivalent. • Experience with AI policy bodies, standards organizations, or government advisory panels. • Familiarity with cross-border data flows, emerging AI regulations, and open-source AI projects. Behavioral Competencies • Strategic Visionary: Anticipates AI trends, shapes long-term roadmaps, and aligns technology with business goals. • Executive Collaborator: Builds trust at board level and More ❯

Certifications: Azure Solutions Architect Expert, CISSP, or equivalent. • Experience with AI policy bodies, standards organizations, or government advisory panels. • Familiarity with cross-border data flows, emerging AI regulations, and open-source AI projects. Behavioral Competencies • Strategic Visionary: Anticipates AI trends, shapes long-term roadmaps, and aligns technology with business goals. • Executive Collaborator: Builds trust at board level and More ❯

We set high standards, ensuring that our contributions are not just good but exceptional. Openness and Transparency We believe trust and transparency are key to our success. We maintain open communication within our teams and with stakeholders, sharing both successes and challenges. Our open-source approach allows customers to explore our technology, building trust and ensuring our More ❯

We set high standards, ensuring that our contributions are not just good but exceptional. Openness and Transparency We believe trust and transparency are key to our success. We maintain open communication within our teams and with stakeholders, sharing both successes and challenges. Our open-source approach allows customers to explore our technology, building trust and ensuring our More ❯

We set high standards, ensuring that our contributions are not just good but exceptional. Openness and Transparency We believe trust and transparency are key to our success. We maintain open communication within our teams and with stakeholders, sharing both successes and challenges. Our open-source approach allows customers to explore our technology, building trust and ensuring our More ❯

We set high standards, ensuring that our contributions are not just good but exceptional. Openness and Transparency We believe trust and transparency are key to our success. We maintain open communication within our teams and with stakeholders, sharing both successes and challenges. Our open-source approach allows customers to explore our technology, building trust and ensuring our More ❯

optimisation strategies for model inference (e.g., dynamic batching, flash attention, speculative decoding). With preferred backgrounds covering some of the following: - Publications in top-tier conferences. - Contributions to popular open-source repositories. - Exceptional technical writing skills as evidenced by relevant publications or blogs. We encourage you to apply even if you do not feel you match all of … looking for, but it is not exhaustive. If you are interested in the role, the team, and our mission, we would love to consider your application. We are always open to conversations and look forward to hearing from you. Who we are: Speechmatics is the leading expert in Speech Intelligence, and uses AI and Machine Learning to unlock business … no matter their gender, identity or expression, race, disability, age, sexual orientation, religion, belief, marital status, national origin, veteran status, pregnancy, or maternity status. But we don't just open the door to diversity - we actively welcome it. Why? Because we believe every unique voice adds something special to our team, leading us to smarter solutions and a better More ❯

understanding their motivations, targets, and methods, and assessing client exposure. The Global Threat Intelligence team has built a strong reputation in collecting its own data and combining it with open and commercial sources. In this role, you will analyse cyber threats, develop actionable intelligence, and collaborate with internal stakeholders. You will also contribute to the creation and maintenance of … the wider organisation will be critical in the development of NCC Group’s Threat Intelligence capabilities and the broader service we offer. Key Accountabilities: OSINT collection and analysis - analysing open-source intelligence (OSINT) from the surface, deep and dark web. Dark web access and monitoring - Gain and maintain access to dark web resources, including forums, marketplaces, shops, and More ❯

understanding their motivations, targets, and methods, and assessing client exposure. The Global Threat Intelligence team has built a strong reputation in collecting its own data and combining it with open and commercial sources. In this role, you will analyse cyber threats, develop actionable intelligence, and collaborate with internal stakeholders. You will also contribute to the creation and maintenance of … the wider organisation will be critical in the development of NCC Group’s Threat Intelligence capabilities and the broader service we offer. Key Accountabilities: OSINT collection and analysis - analysing open-source intelligence (OSINT) from the surface, deep and dark web. Dark web access and monitoring - Gain and maintain access to dark web resources, including forums, marketplaces, shops, and More ❯

understanding their motivations, targets, and methods, and assessing client exposure. The Global Threat Intelligence team has built a strong reputation in collecting its own data and combining it with open and commercial sources. In this role, you will analyse cyber threats, develop actionable intelligence, and collaborate with internal stakeholders. You will also contribute to the creation and maintenance of … the wider organisation will be critical in the development of NCC Group’s Threat Intelligence capabilities and the broader service we offer. Key Accountabilities: OSINT collection and analysis - analysing open-source intelligence (OSINT) from the surface, deep and dark web. Dark web access and monitoring - Gain and maintain access to dark web resources, including forums, marketplaces, shops, and More ❯

understanding their motivations, targets, and methods, and assessing client exposure. The Global Threat Intelligence team has built a strong reputation in collecting its own data and combining it with open and commercial sources. In this role, you will analyse cyber threats, develop actionable intelligence, and collaborate with internal stakeholders. You will also contribute to the creation and maintenance of … the wider organisation will be critical in the development of NCC Group’s Threat Intelligence capabilities and the broader service we offer. Key Accountabilities: OSINT collection and analysis - analysing open-source intelligence (OSINT) from the surface, deep and dark web. Dark web access and monitoring - Gain and maintain access to dark web resources, including forums, marketplaces, shops, and More ❯

until December 2025 – possible extension based on performance We’re looking for an AI Research Engineer to join a world-leading social technology company known for building cutting-edge open-source large language models used by millions every day. You’ll work on next-gen AI assistants — improving prompts, testing agent behavior, and fine-tuning performance — while diving … Tech Stack needed - Languages: Python (Advanced, LeetCode-level), PHP (basic familiarity) Databases: SQL (basic–intermediate querying & analysis) AI/LLM Frameworks: LangChain, Model Context Protocol (MCP) Tools: Git/source control Concepts: Large Language Models (LLMs), prompt engineering, AI agent development 💡 This is your chance to work on AI that’s shaping the future — at a scale few companies More ❯

until December 2025 – possible extension based on performance We’re looking for an AI Research Engineer to join a world-leading social technology company known for building cutting-edge open-source large language models used by millions every day. You’ll work on next-gen AI assistants — improving prompts, testing agent behavior, and fine-tuning performance — while diving … Tech Stack needed - Languages: Python (Advanced, LeetCode-level), PHP (basic familiarity) Databases: SQL (basic–intermediate querying & analysis) AI/LLM Frameworks: LangChain, Model Context Protocol (MCP) Tools: Git/source control Concepts: Large Language Models (LLMs), prompt engineering, AI agent development 💡 This is your chance to work on AI that’s shaping the future — at a scale few companies More ❯

until December 2025 – possible extension based on performance We’re looking for an AI Research Engineer to join a world-leading social technology company known for building cutting-edge open-source large language models used by millions every day. You’ll work on next-gen AI assistants — improving prompts, testing agent behavior, and fine-tuning performance — while diving … Tech Stack needed - Languages: Python (Advanced, LeetCode-level), PHP (basic familiarity) Databases: SQL (basic–intermediate querying & analysis) AI/LLM Frameworks: LangChain, Model Context Protocol (MCP) Tools: Git/source control Concepts: Large Language Models (LLMs), prompt engineering, AI agent development 💡 This is your chance to work on AI that’s shaping the future — at a scale few companies More ❯

until December 2025 – possible extension based on performance We’re looking for an AI Research Engineer to join a world-leading social technology company known for building cutting-edge open-source large language models used by millions every day. You’ll work on next-gen AI assistants — improving prompts, testing agent behavior, and fine-tuning performance — while diving … Tech Stack needed - Languages: Python (Advanced, LeetCode-level), PHP (basic familiarity) Databases: SQL (basic–intermediate querying & analysis) AI/LLM Frameworks: LangChain, Model Context Protocol (MCP) Tools: Git/source control Concepts: Large Language Models (LLMs), prompt engineering, AI agent development 💡 This is your chance to work on AI that’s shaping the future — at a scale few companies More ❯

seeking a Java Developer to support industry adoption of a global data and digital standards framework used across derivatives markets. Key Responsibilities Contribute to the development and implementation of open-source data models for derivatives trade processing and regulatory reporting. Write clean, efficient Java and Python code and work within GitHub repositories (branches, pull requests, issue management). More ❯

seeking a Java Developer to support industry adoption of a global data and digital standards framework used across derivatives markets. Key Responsibilities Contribute to the development and implementation of open-source data models for derivatives trade processing and regulatory reporting. Write clean, efficient Java and Python code and work within GitHub repositories (branches, pull requests, issue management). More ❯