1 to 25 of 59 Permanent Open Source Jobs in London

infrastructure company, enabling organizations to build and operate scalable, secure, and sovereign infrastructure for modern AI, machine learning, and data-intensive applications. By combining open source innovation with deep expertise in Kubernetes orchestration, Mirantis empowers platform engineering teams to deliver composable, production-ready developer platforms across any environment … driven workloads, Mirantis delivers the automation, GPU orchestration, and policy-driven control needed to manage infrastructure with confidence and agility. Committed to open standards and freedom from lock-in, Mirantis ensures that customers retain full control of their infrastructure strategy. Job Description Mirantis is inviting an experienced and client ...

infrastructure company, enabling organizations to build and operate scalable, secure, and sovereign infrastructure for modern AI, machine learning, and data-intensive applications. By combining open source innovation with deep expertise in Kubernetes orchestration, Mirantis empowers platform engineering teams to deliver composable, production-ready developer platforms across any environment … driven workloads, Mirantis delivers the automation, GPU orchestration, and policy-driven control needed to manage infrastructure with confidence and agility. Committed to open standards and freedom from lock-in, Mirantis ensures that customers retain full control of their infrastructure strategy. Job Description Mirantis is inviting an experienced and client ...

Ultralytics, we relentlessly drive innovation in AI, building the world's leading open-source models. We're looking for passionate individuals obsessed with AI, eager to make a global impact, and ready to excel in a dynamic, high-energy environment. Join our team and help shape the future … Actions for automated model training, testing, and benchmarking. Collaborating with our research and engineering teams to implement cutting-edge techniques and contribute to our open-source repositories. Engaging with our global community by creating documentation, tutorials, and supporting users to solve real-world problems with our technology. Your ...

+ equity We're hiring for a UK cyber security startup building a platform that helps organisations detect malicious open-source code and secure their software supply chain in real time. The product continuously scans dependencies, surfaces risk clearly, and helps teams prevent compromised packages from entering … curious about cyber security, this is a chance to build something genuinely important. Why this is interesting (especially if you like cyber) Open source and third-party dependencies are now one of the biggest attack paths for modern organisations. This team is tackling that head-on with ...

translate wireframes and prototypes to polished, accessible product UIs. Hands-on experience integrating LLMs/generative models into applications (OpenAI, Anthropic, local/open-source LLMs): prompt engineering, response handling, safety guardrails, RAG architectures. Good understanding of how large language models work, including transformer architecture, tokenization, attention mechanisms … component libraries (Figma workflows, design tokens) Background in regulated industries (healthcare, pharma, finance) with awareness of compliance and data governance constraints. Contributions to open-source projects, public talks or technical writing about LLM-enabled UX or frontend engineering. How to Apply Please submit your CV via the application ...

electronic market connectivity, and direct experience working in Front Office environments. Highly desirable candidates will have contributed to, or authored components of, the QuickFIX open-source project , demonstrating strong protocol-level expertise and engineering rigor. Key Responsibilities: Design, develop, and maintain FIX-based market connectivity solutions for Front … electronic trading or market connectivity development Expert-level knowledge of FIX protocol , including session management and message flows Authored or contributed to the QuickFIX open-source project Deep experience with FIX engines such as QuickFIX or similar frameworks Strong hands-on experience with C#/.NET Proven Front ...

with the latest technologies and trends in Python development and actively contribute to the team's technical knowledge base. Contribute to Machine Learning related Open Source initiatives. Requirements : The technical requirements for the role are: Extensive professional experience as a Python-based developer. Experience with modern Python development … pipelines. Advanced proficiency with code maintenance tools and best practice, including Git and configuring workflows. Experience either contributing to or maintaining Python based open-source projects. Have a passion for code quality and things done right. Additional beneficial experience includes: Familiarity with CUDA and optimising highly parallelised ...

What You'll Do As a Computer Vision Engineer at Ultralytics, you will be at the forefront of developing and refining our world-class, open-source AI models. You will drive the entire lifecycle of our models, from research to real-world deployment. Key responsibilities include: Developing, training … Excellent problem-solving skills and the ability to perform in a fast-paced, high-intensity environment. A strong portfolio of projects or contributions to open-source AI repositories. 🌟 Cultural Fit - Intensity Required Ultralytics is a high-performance environment for world-class talent obsessed with achieving extraordinary results. ...

full software development lifecycle, including architecture, technical design, C++ development, bug fixing, as well as functional and performance validations. Be part of the open-source XRP ledger community, setting high standards for coding, testing, and deployment. Actively participate in code reviews to maintain the high quality … Ability to learn new technologies and languages quickly. Ability to independently solve highly complex problems with creative solutions. Nice to have: Experience in developing open-source software and contributing to collaborative blockchain communities. WHO WE ARE: Do Your Best Work The opportunity to build in a fast-paced ...

ground up, focusing on the flow of funds first to help businesses realize their product visions on a solid financial foundation. Starting with an Open Source Ledger (i.e. a database for financial transactions), we’re building a comprehensive suite of modern financial backend modules, including native and automated … leading SaaS companies and financial institutions like Booksy, Doctolib, and Liberis, along with many others worldwide. Our success stems from the trust in our open-source foundation, the high level of programmability of our solutions, and our software-first approach, moving beyond traditional payment business models. ...

Engineer | Data Visualisation | 2D Graphics London | to £200,000 depending on exp. I'm hiring a Senior Engineer to work on a widely-used, open-source charting library relied on by thousands of engineers building data-intensive products. This is not a typical frontend role. … product theatre. No endless hand-offs. Just proper engineering responsibility. Your work is visible and respected You’ll be contributing to a well-known open-source project used in serious production environments — experience that carries weight long after this role. A grown-up engineering culture No outsourcing. ...

Business Development) LOCATION: London, U.K. COMPANY OVERVIEW District 4 Labs (“District 4” or “D4”) is a cutting-edge data business dedicated to building the open-source intelligence (OSINT) tools and technologies of tomorrow. Its flagship product, DARKSIDE, is one of the world’s largest repositories of breached data … winning new clients and partners in the region. Qualified candidates will have: · A minimum of five (5) years of experience working in the open-source intelligence (“OSINT”) field, preferably in the private sector. · Working knowledge of the broader OSINT sector, including familiarity with investigative tools/platforms ...

case-management or service-orchestration platforms Understanding of agentic AI capabilities and how they can complement workflow automation Experience mentoring developers or contributing to open-source Camunda extensions Already holding UK security clearance (SC, DV, eDV) What They Offer A company option scheme gives their employees a stake ...

practices for production deployment. Generative AI & LLM Integration - Proficient in working with Large Language Models including OpenAI GPT models, Anthropic Claude, Azure OpenAI, and open-source alternatives (Llama, Mistral). Experience with prompt engineering, fine-tuning, RAG (Retrieval Augmented Generation) architectures, vector databases (Pinecone, ChromaDB, FAISS), embeddings ...

solutions to complex technical problems independently Desirable experience Experience in designing and implementing Docker images through containerisation Experience in prototyping through reuse of existing Open-Source components Benefits In return, you can expect a planned, transparent progression with learning and development tailored to your role, an environment with ...

large-scale models using tools such as Tensorflow or PyTorch is a plus. You stay up-to-date with the state-of-the-art open source infrastructure solutions applicable to designing and improving large scale recommender systems, data engineering, and machine learning You have a Master ...

Banking/Financial Services Advantageous to have • Familiarity with distributed systems and orchestration • Experience with performance optimization and large-scale data processing • Contributions to open-source projects • Experience working with Large Language Models (LLMs ...

large-scale models using tools such as Tensorflow or PyTorch is a plus. You stay up-to-date with the state-of-the-art open source infrastructure solutions applicable to designing and improving large scale recommender systems, data engineering, and machine learning You have a Master ...

experience with Python, modern development techniques, and design patterns. Experience in data science tools and ML tools (e.g., NumPy, pandas, scikit-learn, PyTorch) and open-source contributions (especially Python-based) would be a bonus. Familiarity with CUDA, GPU-based computations, end-to-end neural network training, MLOps ...

senior stakeholders. Deep domain experience in regulated or data-rich industries (e.g. financial services, healthcare). Track record of thought leadership (publications, patents, open source, or industry impact). Technical Excellence Expert Python and modern ML frameworks (PyTorch, TensorFlow). Strong experience with Generative AI tooling (e.g. LangChain ...

experience when required using Java, Scala, or Python Strong experience with big data technologies Experience designing architectures on Microsoft Azure Experience with both open-source and vendor data platforms Strong understanding of architectural methodologies and design principles Experience designing microservices-based architectures Strong data modelling experience Understanding ...

accessibility for analytics and machine learning applications. MLOps Implementation & Application Engineering: Collaborate directly with machine learning engineers and production application engineers to integrate open source MLOps pipelines (CI/CD for ML) and deploy models seamlessly into production environments using specialised tools like MLflow, DVC and Feast. Advanced ...

guiding technical teams to deliver Desirable Experience DevOps practices and CI/CD pipelines Secure-by-design development and security best practices Contributions to open-source projects ...

capabilities across platforms. About the Role Lead the design, implementation, and fine-tuning of LLMs and generative AI solutions (OpenAI, Anthropic Claude, Gemini, open-source models). Build and optimize RAG pipelines , vector databases, and prompt engineering strategies. Develop AI-powered applications integrating LLMs with APIs, agents ...

startup environments, enjoy solving real problems, and learn quickly. Proven impact: Youve built and scaled products, led projects that made a difference, contributed to open-source, or delivered results that truly moved the needle. Why youll love it here Impact from day one: Your work goes live quickly ...