151 to 175 of 509 Open Source Jobs in England

Founding Lead Machine Learning Engineer

Hiring Organisation
A1
Location
Crawley, West Sussex, UK
Employment Type
Full-time
ones fall short. What You'll be Doing Build end-to-end training pipelines: data → training → eval → inference Design new model architectures or adapt open-source frontier models Fine-tune models using state-of-the-art methods (LoRA/QLoRA, SFT, DPO, distillation) Architect scalable inference systems using … owning ambiguous, zero-to-one technical problems end-to-end Nice to Have Experience with LLM inference frameworks (vLLM, TensorRT-LLM, FasterTransformer) Contributions to open-source ML libraries Background in scientific computing, compilers, or GPU kernels Experience with RLHF pipelines (PPO, DPO, ORPO) Experience training or deploying multimodal ...

Founding Lead Machine Learning Engineer

Hiring Organisation
A1
Location
York, North Yorkshire, UK
Employment Type
Full-time
ones fall short. What You'll be Doing Build end-to-end training pipelines: data → training → eval → inference Design new model architectures or adapt open-source frontier models Fine-tune models using state-of-the-art methods (LoRA/QLoRA, SFT, DPO, distillation) Architect scalable inference systems using … owning ambiguous, zero-to-one technical problems end-to-end Nice to Have Experience with LLM inference frameworks (vLLM, TensorRT-LLM, FasterTransformer) Contributions to open-source ML libraries Background in scientific computing, compilers, or GPU kernels Experience with RLHF pipelines (PPO, DPO, ORPO) Experience training or deploying multimodal ...

Founding Lead Machine Learning Engineer

Hiring Organisation
A1
Location
Brighton, East Sussex, UK
Employment Type
Full-time
ones fall short. What You'll be Doing Build end-to-end training pipelines: data → training → eval → inference Design new model architectures or adapt open-source frontier models Fine-tune models using state-of-the-art methods (LoRA/QLoRA, SFT, DPO, distillation) Architect scalable inference systems using … owning ambiguous, zero-to-one technical problems end-to-end Nice to Have Experience with LLM inference frameworks (vLLM, TensorRT-LLM, FasterTransformer) Contributions to open-source ML libraries Background in scientific computing, compilers, or GPU kernels Experience with RLHF pipelines (PPO, DPO, ORPO) Experience training or deploying multimodal ...

Staff Software Engineer, C++

Hiring Organisation
Ripple
Location
London, UK
Employment Type
Full-time
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. Other common names for this role: C++ Developer, Staff C++ Engineer ...

Staff Software Engineer, C++

Hiring Organisation
Ripple
Location
Slough, Berkshire, UK
Employment Type
Full-time
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. Other common names for this role: C++ Developer, Staff C++ Engineer ...

Design Verification Engineer

Hiring Organisation
Platform Recruitment
Location
City of London, London, United Kingdom
supported in pushing the envelope alongside top pioneers in verification. Responsibilities Design and maintain robust testbenches and targeted tests using the organisation’s mixed open-source and proprietary verification environment. Develop and own comprehensive verification plans, ensuring coverage goals and test strategies are clear and defensible. Identify … resolve design defects efficiently. Oversee and refine the test infrastructure, including management of test suites, CI pipelines, and the improvement of both internal and open-source tooling. Requirements Strong debugging and analytical capability, able to isolate and resolve complex RTL and testbench issues efficiently. At least two years ...

Backend Engineer (Distributed Systems Engineer)

Hiring Organisation
TechChain Talent
Location
City of London, London, United Kingdom
that scale across thousands of nodes • Performance-critical modules for consensus, networking, and data pipelines • Internal tooling for observability, testing, and simulation • Contributions to open-source infra and protocol-level primitives What You Bring • 5+ years of backend engineering experience in systems-level environments • Deep knowledge of distributed … cloud-native infra • Familiarity with blockchain, cryptographic protocols, or decentralized coordination Bonus Points • Experience in zero-knowledge systems, MPC, or verifiable computation • Contributions to open-source infra projects • Prior work in Layer 1 or Layer 2 blockchain development Why Join • Stealth-stage impact with protocol-grade ownership • Competitive ...

Backend Engineer (Distributed Systems Engineer)

Hiring Organisation
TechChain Talent
Location
Slough, Berkshire, UK
Employment Type
Full-time
that scale across thousands of nodes • Performance-critical modules for consensus, networking, and data pipelines • Internal tooling for observability, testing, and simulation • Contributions to open-source infra and protocol-level primitives What You Bring • 5+ years of backend engineering experience in systems-level environments • Deep knowledge of distributed … cloud-native infra • Familiarity with blockchain, cryptographic protocols, or decentralized coordination Bonus Points • Experience in zero-knowledge systems, MPC, or verifiable computation • Contributions to open-source infra projects • Prior work in Layer 1 or Layer 2 blockchain development Why Join • Stealth-stage impact with protocol-grade ownership • Competitive ...

Embedded Linux Engineer

Hiring Organisation
Platform Recruitment
Location
CB3, Cambridge, Cambridgeshire, United Kingdom
Employment Type
Permanent
Salary
£60000 - £70000/annum
Embedded Linux Engineer : Porting the OS, integrating with ODM software Fixing build issues when moving to new platforms and applying patches to debug open-source software Researching technical growth Requirements: Highly experienced with embedded build systems, preferably buildroot, OpenWRT, or other WRT-Variants Experienced with CLANG and very … confident working with patches on open source software Strong understanding of network protocols Desirable skills for an Embedded Linux Engineer: Experience developing Linux kernel modules and using the kernel build system Knowledge of the Wireless and Linux network stack Experience managing the process from a reference board ...

Oracle DBA

Hiring Organisation
Sanderson Government and Defence
Location
Warwickshire, West Midlands, United Kingdom
Employment Type
Contract
/SQL. Manage backup and recovery strategies using RMAN. Support and maintain Oracle WebLogic environments. Develop and maintain reporting solutions using OBIEE. Work with open-source platforms such as Liferay and Oracle development frameworks including ADF and APEX. Required Skills & Experience In-depth knowledge of Oracle Database Architecture … Business Suite R12 setup and administration. Proficiency in SQL*Plus, PL/SQL, and scripting for automation. Experience with Oracle WebLogic, OBIEE, and open-source tools like Liferay. Familiarity with Oracle ADF and APEX development frameworks. Reasonable Adjustments: Respect and equality are core values to us. ...

Senior Software Governance Engineer

Hiring Organisation
Fruition Group
Location
London, United Kingdom
Employment Type
Permanent
predictions in real-time. Your role will be to: Design and deploy scalable and reliable governance solutions using a mix of existing technologies, open-source tools, open policy agent. Contribute to an automated policy engine that integrates with existing authorisation systems, uses policy as code, is cloud ...

Principal / Associate Geospatial Developer

Hiring Organisation
Tetra Tech
Location
Manchester, North West, United Kingdom
Employment Type
Permanent
Edge Technology: Get hands-on with the full Esri product suite (ArcGIS Pro, Enterprise, AGOL), Microsoft Azure, MS SQL Server, PostgreSQL and the latest open-source platforms - plus AI/ML frameworks that power truly intelligent mapping and analytics. Diverse, High-Impact Projects: From single-discipline proofs ...

Principal / Associate Geospatial Developer

Hiring Organisation
Tetra Tech
Location
Southampton, Hampshire, South East, United Kingdom
Employment Type
Permanent
Edge Technology: Get hands-on with the full Esri product suite (ArcGIS Pro, Enterprise, AGOL), Microsoft Azure, MS SQL Server, PostgreSQL and the latest open-source platforms - plus AI/ML frameworks that power truly intelligent mapping and analytics. Diverse, High-Impact Projects: From single-discipline proofs ...

AI Prompt Engineer

Hiring Organisation
Staffworx
Location
London, England, United Kingdom
Prompting, Reasoning & Agentic Systems Design, test, and optimize prompts for leading frontier models (GPT-4.x/5, Claude 3+, Gemini, LLaMA, DeepSeek, and emerging open-weight models). Apply advanced prompting and reasoning techniques, including: Chain-of-Thought, ReAct, Tree-of-Thoughts, Graph-of-Thoughts, Program-of-Thoughts Self … mitigation, governance, and compliance frameworks. Background in Computer Science, AI/ML, Engineering, or a related technical discipline. Experience deploying, fine-tuning, or serving open-source LLMs in production. Staffworx is a UK-based Talent & Recruiting Partner supporting organisations across Digital Commerce, Software Engineering, and Value-Add Consulting ...

Senior Java Developer - Manchester

Hiring Organisation
Morson Edge
Location
Manchester, North West, United Kingdom
Employment Type
Permanent
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 ...

Java Engineer

Hiring Organisation
Profile 29
Location
South East London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£60,000
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 ...

AI Automation Engineer

Hiring Organisation
McCabe & Barton
Location
Central London, London, United Kingdom
Employment Type
Permanent
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 ...

AI Automation Engineer

Hiring Organisation
McCabe & Barton
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
Up to £700 per day
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 ...

Python Developer

Hiring Organisation
Proactive Appointments
Location
Guildford, Surrey, England, United Kingdom
Employment Type
Full-Time
Salary
£55,000 - £65,000 per annum
systems experience Excellent written and verbal communication skills for both technical and non-technical audiences Desirable/Bonus Skills FreeSWITCH configuration and/or source code knowledge C/C++ for open-source troubleshooting Kamailio configuration experience Auth0/OAuth 2.0 MongoDB or MySQL GitHub Actions ...

Senior Software Developer

Hiring Organisation
OPR Ltd
Location
Guildford, Surrey, South East, United Kingdom
Employment Type
Permanent
Salary
£65,000
systems) Docker containerisation Linux (Ubuntu-based) environments A full driving licence and car due to the clients location Desirable Skills FreeSWITCH (configuration and, ideally, source code) C/C++ (for open-source troubleshooting or minor code changes) Kamailio Auth0/OAuth 2.0 MongoDB and/or MySQL ...

Senior Software Engineer

Hiring Organisation
Candour
Location
Manchester Area, United Kingdom
NoSQL • Cloud & Infrastructure: AWS, Azure, GCP, Docker, Kubernetes, CI/CD • Messaging & APIs: Kafka, RabbitMQ, RESTful, GraphQL • Other: Git, large‐scale distributed systems, opensource contributions 3-stage interview process. Message me with any further questions and if you want to know more details before applying ...

Senior Cloud Engineer

Hiring Organisation
Fruition Group
Location
London, UK
Employment Type
Full-time
modern engineering practices (Git-based workflows, DevOps, observability, automation) Experience working in agile delivery environments using tools such as Jira or Confluence Familiarity with open-source tooling and communities Experience with cloud security, vulnerability scanning, and risk management tools Strong knowledge of networking concepts for large-scale, container ...

Senior Cloud Engineer

Hiring Organisation
Fruition Group
Location
Slough, Berkshire, UK
Employment Type
Full-time
modern engineering practices (Git-based workflows, DevOps, observability, automation) Experience working in agile delivery environments using tools such as Jira or Confluence Familiarity with open-source tooling and communities Experience with cloud security, vulnerability scanning, and risk management tools Strong knowledge of networking concepts for large-scale, container ...

Senior Full Stack Engineer (Golang/Typescript/Kubernetes)

Hiring Organisation
Safe Intelligence
Location
Slough, Berkshire, UK
Employment Type
Full-time
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 Full Stack Engineer (Golang/Typescript/Kubernetes)

Hiring Organisation
Safe Intelligence
Location
City of London, London, United Kingdom
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 ...