25 of 25 Contract Open Source Jobs

RAG Systems ( Security Clearance Essential ) 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 ❯

component, functional, system integration and regression tests. - Experience working with Git on small to medium sized teams. - Experience designing and developing REST APIs for high volume clients. - Experience with open-source frameworks is a plus especially maintaining or contributing to open source projects! - Experience with container and container orchestration technologies, such as Docker and Kubernetes. - Comfortable More ❯

component, functional, system integration and regression tests. - Experience working with Git on small to medium sized teams. - Experience designing and developing REST APIs for high volume clients. - Experience with open-source frameworks is a plus especially maintaining or contributing to open source projects! - Experience with container and container orchestration technologies, such as Docker and Kubernetes. - Comfortable More ❯

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 infrastructure.This React and TypeScript Software Engineer opportunity is deeply technical, and we want someone with solid Python or TypeScript experience and a thirst to know … enjoys 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 now More ❯

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 infrastructure. This React and TypeScript Software Engineer opportunity is deeply technical, and we want someone with solid Python or TypeScript experience and a thirst to … 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 ❯

encourage to solve problem in innovative ways. You will work in a diversified team with different culture background but share common goals. Your contribution can be up-streamed to open source communities. Key Responsibilities Develop LLVM based compilers: - Enable compiler for new architecture features - Use AI technology to help compiler optimize - Design & implement optimization for xPU architectures Analyze … job: Required: Passionate to develop compiler Advanced C/C++ programming skills Basic knowledge of CPU architecture Desired: BSc/MSc/MSci in CS Experience of contributing to open source projects Good at self-learning, courageous to explore new things, strong in practical skills Good communication skills and teamwork More ❯

support a live on-premise deployment and maintenance of Kubernetes clusters using RKE2. This role sits within a delivery critical environment and requires direct experience with infrastructure as code, open-source integration and hands-on cluster configuration. Youll be working across: Multi-node RKE2 clusters set-up, networking, RBAC, disaster recovery and failover Installation and configuration of open source components Including Prometheus, Grafana, Loki, Alloy, PostgreSQL, Rook Ceph, ActiveMQ Artemis, and Keycloak Kubernetes native deployment tooling - Helm and Kustomize (creation and use required) plus exposure to FluxCD pipelines Service integration and lifecycle management - dashboards, databases, identity, messaging and object storage On-prem delivery mindset no cloud native shortcuts, full infrastructure control from install to runtime Clear More ❯

core parts of the platform. You'll take ownership across the full development lifecycle, from system design and implementation to optimisation and release. You'll be working in an open, fast-moving environment where ideas get tested quickly and good engineering practices are taken seriously. If you like seeing your work go live within days - not weeks - you'll … 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 Senior Go Developer looking for a fast-paced, collaborative contract role where your work will ship quickly and matter to real users 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 ❯

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

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

engineering teams to streamline developer workflows. Ensure scalability, security, and usability of the developer portal. Provide technical guidance, documentation, and training for engineering teams adopting Backstage. Contribute to Backstage open-source ecosystem (where applicable). Profile The Spotify Backstage Developer will have strong experience in TypeScript/JavaScript (React knowledge highly desirable). Experience working with Spotify Backstage More ❯

DevOps team. This is an exciting opportunity to contribute to the creation of a new era - enabling infrastructure-as-code practices, and making it fast and simple to deploy open-source software across multiple public clouds and Raspberry Pi clusters. What you'll be doing: Collaborating with the Product Owner to deliver key outcomes and shape innovative solutions. More ❯

pair programming, and continuous integration/deployment processes. Help troubleshoot and resolve live service issues, ensuring high availability and resilience. Work within GDS (Government Digital Service) standards, contributing to open-source where applicable. Essential Skills and Experience Tech stack: Frontend- Express/Casa/Nunjuks with Typescript Backend- Java/Spring boot with some AWS integration's (SNS More ❯

pair programming, and continuous integration/deployment processes. Help troubleshoot and resolve live service issues, ensuring high availability and resilience. Work within GDS (Government Digital Service) standards, contributing to open-source where applicable. Essential Skills and Experience Tech stack: Frontend- Express/Casa/Nunjuks with Typescript Backend- Java/Spring boot with some AWS integration's (SNS More ❯

with working in technology-driven organisations or start-ups Hands-on skills in Kafka, Cassandra, gRPC, and microservices architecture will also be beneficial, as well as experience contributing to open-source projects If you're a passionate Backend Engineer who enjoys working autonomously, taking ownership, and building for impact in a high-trust, high-collaboration setting - apply now More ❯

human feedback (RLHF). Familiarity with multi-modal AI systems (e.g., text-to-image, speech-to-text). Background in UX writing, technical writing, or computational linguistics. Contributions to open-source GenAI projects or publications in AI/ML conferences. Does this sound like your next career move? Apply today! Working with Certain Advantage We go the extra More ❯

debugging, and communication skills Ability to work independently and manage full project life cycle Bonus Experience: Financial services or regulated environments SDKs: LaunchDarkly, Sentry, Plaid Mobile analytics tools and open-source contributions Ready to build secure, elegant apps that scale? Apply now or contact for a confidential discussion. More ❯

Application Developer London - hybrid 8 Months+ Inside IR35- Umbrella only Core Technical Skills: React Native & Expo: Proficient with React Native and Expo open source modules (bare workflow) Strong React fundamentals: hooks, context, state management React Navigation, app routing JavaScript & TypeScript Advanced JavaScript (ES6+) and TypeScript Type safety and maintainability for large-scale projects Native Platform Integration Swift (iOS More ❯

of Kotlin/Java, Strong knowledge of Android SDK, Android UI design principles, patterns, and best practices, Experience with offline storage, threading, and performance tuning, Awesome knowledge of the open-source Android ecosystem and the libraries available for common tasks and benchmarking and optimisation, Proficient in Google's Android design principles, interface guidelines and code versioning tools, such More ❯

Month Contract Rate: 500- 600/day (Inside IR35) Location: Remote (Occasional travel to Berkshire HQ) Clearance: NPPV3 Required Are you an experienced GIS Consultant with a passion for open-source solutions? Do you thrive in a consulting environment, guiding clients through complex system migrations? We are helping a dynamic and growing IT consultancy, partnering with a prestigious More ❯

Month Contract Rate: £500-£600/day (Inside IR35) Location: Remote (Occasional travel to Berkshire HQ) Clearance: NPPV3 Required Are you an experienced GIS Consultant with a passion for open-source solutions? Do you thrive in a consulting environment, guiding clients through complex system migrations? We are helping a dynamic and growing IT consultancy, partnering with a prestigious More ❯

enterprise architecture, information assurance and applied AI ethics. We welcome applications from people with a wide range of AI technical experience, including AWS Bedrock and Azure AI Foundry and open-source AI/ML stacks. What you need to do now If you're interested in this role, click 'apply now' to forward an up-to-date copy More ❯

enterprise architecture, information assurance and applied AI ethics. We welcome applications from people with a wide range of AI technical experience, including AWS Bedrock and Azure AI Foundry and open-source AI/ML stacks. What you need to do now If you're interested in this role, click 'apply now' to forward an up-to-date copy More ❯

enterprise architecture, information assurance and applied AI ethics. We welcome applications from people with a wide range of AI technical experience, including AWS Bedrock and Azure AI Foundry and open-source AI/ML stacks. What you need to do now If you're interested in this role, click 'apply now' to forward an up-to-date copy More ❯