1 to 25 of 235 Permanent Open Source Jobs in the UK excluding London

the desktop and data centre. 'Wherever Computing Happens', we need to enable Arm by providing software solutions that interface higher-level software stacks with the hardware itself. Responsibilities: Our Open Source Software group is enabling new Arm architecture in projects such as kernel, firmware, system control and driver development, for a variety of target markets. Software on Arm … As well as the technical work of writing patches to implement new functionality, improve performance and enable new Arm architecture, you will enjoy working as part of the wider open source community. Required Skills and Experience: Proficient C programmer Desire and ability to work as part of a team Passion for open source development "Nice To … Have" Skills and Experience: Armv8-A Architecture Arm64 assembly language Experience of open source working practices Knowledge of Android, Linux kernel, driver development, security, cryptography In Return: Our UK offices are amazing places to collaborate. We also have some scope to adapt the job role and title for the right person - if you are interested but unsure whether 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 ❯

and Bristol, our UK offices are where emerging talent contributes to global innovation. Whether you're helping to shape the next generation of processors or building tools used across open-source communities, the work you do here will have real-world impact from day one. Our roots in the UK run deep and so does our commitment to … the UK. I wanted to join Arm to grow at a company tackling some of the most exciting challenges in tech, in an inclusive and welcoming environment. Working on open-source projects has been a rewarding challenge - learning how to contribute on behalf of Arm and meet the high standards these projects demand. Intern, based in Manchester Graduate … looking for more than just technical ability. At Arm, we want individuals who are curious, collaborative, and motivated to learn. Whether you're experimenting with side projects, contributing to open-source work, or stepping outside your comfort zone, we value candidates who bring initiative and creativity to everything they do. "I'd recommend checking out the blogs on 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 ❯

practices, performs triaging of security issues, and implements fixes to deliver secure applications. Familiar with common software vulnerabilities and leading practices to mitigate. Should have some experience in researching open- source technologies for use in building systems and participate in open source communities as needed. Works on projects of moderate scope and complexity. Pro-actively identifies More ❯

to maintain and improve the core C++ codec integration layers. Integrate compression solutions, like VC6 and Point Cloud Compression, into different video editing and creation applications. Engage with the open-source community to contribute changes upstream to video player Open Source projects and assist in integrating LCEVC. Resolve defects within the codec integration layer and across More ❯

code through rigorous testing and code review processes. Contribute to cross-platform development (Windows, Linux, Android, iOS, Mac) using CMake. Utilize unit testing frameworks like GTest/Catch and open-source libraries such as Boost and OpenCV. Work with .NET Core and Restful API, and proficiency in scripting languages like Python. Implement complex object-oriented patterns, public interfaces … What We're Looking For: Proven experience in software development in a commercial environment. Strong proficiency in modern C++ development and cross-platform development. Familiarity with unit testing frameworks, open-source libraries, and code review processes. Working knowledge of .NET Core, Restful API, and scripting languages. Passion for problem-solving and a commitment to continuous improvement. Experience in More ❯

code through rigorous testing and code review processes. Contribute to cross-platform development (Windows, Linux, Android, iOS, Mac) using CMake. Utilize unit testing frameworks like GTest/Catch and open-source libraries such as Boost and OpenCV. Work with .NET Core and Restful API, and proficiency in scripting languages like Python. Implement complex object-oriented patterns, public interfaces … What We're Looking For: Proven experience in software development in a commercial environment. Strong proficiency in modern C++ development and cross-platform development. Familiarity with unit testing frameworks, open-source libraries, and code review processes. Working knowledge of .NET Core, Restful API, and scripting languages. Passion for problem-solving and a commitment to continuous improvement. Experience in More ❯

Location: Manchester, Fully Remote Category: Contract Jobs Salary: 225pd + Outside IR35, Fully Remote Ref: JT/JC/5956 Contact Name: James Clarke Telephone: React and Typescript/Open-Source Software Engineer to join our talented & recently formed creative team. Based in Manchester and fully remote, the team are designing and developing the next generation containerised IT … peer code review. Any exposure to Angular front-end tech is highly advantageous. Are you excited about Golang, Jenkins, Dockers, Kubernetes, architecture, test driven development, API's and everything open source? Then I'd love to hear from you. Superb environment, office, tech stack and ability to learn from one of the greatest in the industry. Please apply More ❯

implement next-generation networking features. Visa sponsorship is available. What youll do: Port embedded Linux systems to new hardware targets using third-party SDKs. Debug and apply patches to open-source components for stability, performance, and compatibility. Resolve build issues and streamline build systems for multiple platforms. Research and integrate emerging networking technologies, including new wireless standards and … programming experience in an embedded Linux environment. Build system expertise (e.g., Buildroot, BitBake, Yocto, or similar). Understanding of networking protocols and their implementation in embedded systems. Experience with open-source patching workflows and upstream contribution processes. Bonus: knowledge of wireless networking, Linux kernel development, or enterprise networking features. Why join us? Youll work on a product suite More ❯

services, scheduled tasks, web servers (e.g. IIS) Experience with containers such as Docker or Kubernetes and Cloud platforms: AWS (preferred), Azure, or GCP Beneficial to have Magento or other open-source e-commerce platform integration experience Prior experience building middleware for data sync, order processing, and internal APIs in a multi-system e-commerce environment would be highly More ❯

Bonus Points For Experience in microservices architecture and containerization (Docker, Kubernetes) Exposure to CI/CD pipelines and DevOps practices Background in agile methodologies and delivery management Contributions to open-source Java libraries or frameworks Why Join Them? Work with brilliant, passionate engineers Real ownership & influence over the product roadmap Flexible working hours and remote-friendly culture Wellness More ❯

or a similar field. Desirable: Experience migrating monolithic architectures to modular or micro frontend systems Exposure to server-side rendering (SSR) or JAMstack frameworks (e.g., Next.js, Vite) Contributions to open-source projects, internal tooling, or frontend design systems Strong UX sensibility or history of close collaboration with UI/UX design teams Experience working within regulated, high-availability More ❯

support to help you grow 5 Paid Training Days : Stay sharp with continuous learning Pension, Share Scheme, Bonus : A package that rewards your impact You'll be working with open-source tools and modern cloud platforms like AWS and Azure, deploying secure software across public and private environments. Every line of code you write will contribute to systems 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 ❯

systems. Experience of regulatory driven projects. Excellent attention to detail, highly organised with a proactive approach. Strong analytical ability and innovative problem solving skills. SOLID Principles. Software Design Patterns. Source Control (Git). Demonstrates high levels of energy in seeking out and achieving new goals. Can work with BA's/PO's to demystify ambiguity, handle challenge, and … is comfortable to challenge team mates constructively. Open to innovative ideas/experiences and ability to create new ideas, approaches or insights. Seeks opportunities for improvements. Adapts communication style to suit audience. Works ethically and shows respect for both professional and company values. Desired: Contribution to open-source projects. Solves problems with general-purpose scripting language (such More ❯

Python Skills and experience we’d love you to have... Understanding of cloud computing security concepts Experience in relational cloud based database technologies like Snowflake, BigQuery, Redshift Experience in open source technologies like Spark, Kafka, Beam Good understanding of Cloud providers – AWS, Microsoft Azure, Google Cloud Familiarity with DBT, Delta Lake, Databricks Experience working in an agile environment More ❯

Python Skills and experience we’d love you to have... Understanding of cloud computing security concepts Experience in relational cloud based database technologies like Snowflake, BigQuery, Redshift Experience in open source technologies like Spark, Kafka, Beam Good understanding of Cloud providers – AWS, Microsoft Azure, Google Cloud Familiarity with DBT, Delta Lake, Databricks Experience working in an agile environment More ❯

Office/Remote Reporting to: Engineering Manager Job Purpose: We are seeking innovative Linux Systems Engineer to help shape the next generation of secure endpoint solutions. This role is open to both experienced engineers ready to tackle complex challenges and mid-level engineers eager to learn, grow, and innovate. You will work at the intersection of Linux internals, networking … C programming skills for low-level or performance-critical development. Experience with containerisation (Docker, Kubernetes). Familiarity with endpoint security, intrusion detection, or system hardening. Contributions to Linux or open-source projects. Experience with debugging, profiling, or performance optimisation tools. Why Join Us Shape the future of secure endpoint technology. Work on high-impact projects for global, high More ❯

and containerization (Docker). · Understanding of monitoring and tracing tools (e.g., Prometheus, Jaeger, Grafana). · Excellent problem-solving and communication skills. Preferred Qualifications: · Experience contributing to OpenTelemetry or other open-source observability projects. · Familiarity with enterprise environments (e.g., VMware, bare-metal servers, hybrid cloud). · Knowledge of security and compliance considerations in on-prem deployments. · Experience with scripting More ❯

build and maintain resources in Azure cloud using Infrastructure as Code (IaC, Terraform). Lead the design and development of our deployment pipelines and automation solutions using Azure and open-source tooling. Continuously analyse our DevOps processes and identify opportunities to further automate and refine our deployment practices. Engage collaboratively in an agile environment, working closely with solution More ❯

of Product Operating Model Knowledge of Infrastructure as a Code tooling (Chef is essential, Ansible is a plus), containerization knowledge of authentication and biometric system design is highly desired. Open-source experience You may be assessed on the key critical skills relevant for success in role, such as risk and controls, change and transformation, business acumen strategic thinking More ❯

of Product Operating Model Knowledge of Infrastructure as a Code tooling (Chef is essential, Ansible is a plus), containerization knowledge of authentication and biometric system design is highly desired. Open-source experience You may be assessed on the key critical skills relevant for success in role, such as risk and controls, change and transformation, business acumen strategic thinking More ❯

and familiarity with working in technology-driven organisations or start-ups Experience with Kafka, Cassandra, gRPC, and microservices architecture will also be beneficial, as well as experience contributing to open-source projects If you're a passionate GoLang Developer seeking a challenging and rewarding contract role with a reputable tech company, apply now! Our client is looking to More ❯

and familiarity with working in technology-driven organisations or start-ups Experience with Kafka, Cassandra, gRPC, and microservices architecture will also be beneficial, as well as experience contributing to open-source projects If you're a passionate GoLang Developer seeking a challenging and rewarding contract role with a reputable tech company, apply now! Our client is looking to More ❯