1 to 25 of 49 Permanent Open Source Jobs in Hemel Hempstead

Business Intelligence Platform (YC-backed) | Senior Software Engineer At Dynamism.io, we’re excited to partner with the founding team at a leading open-source BI platform to find talented Senior Software Engineers. If you’re passionate about shaping the future of data visualization, building innovative features, and engaging … with a growing community, this role offers a unique chance to make a real impact in an evolving field. About the startup: This open-source business intelligence platform was designed to empower teams to easily query and visualize data. Positioned as an alternative to Looker, the platform integrates … a critical role in enhancing and scaling the platform. From owning features end-to-end to collaborating closely with the founding team and the open-source community, you’ll influence both the product and the company’s broader strategy. Key Responsibilities: Feature Development: Plan, develop, test, deploy, and More ❯

an early career Graduate Software Engineer to help us build our Python LLM evaluation library, working closely with the Engineering and Science teams. We open to hiring remotely in the UK. As one of our first hires this is a high-impact and high-ownership role. We believe this … As one of our first hires, you will work closely with the CTO, and you will be required to lead the development of our open source Python tools, and to engage and grow our community. The ideal candidate is someone with passion for software an AI; ideally, you … should have previous experience with LLMs, contributed to open source projects, and/or show a strong track record of personal software projects. Your duties will include: Own the development of our Python open source evaluation library; Engage with the community through GitHub and/or More ❯

manage the integration, deployment, and support of large-scale private cloud infrastructures. The ideal candidate will have hands-on experience with both Enterprise and open-source virtualization technologies, containerization, and storage solutions. Experience with RedHat OpenShift, and familiarity with variations of OpenStack or similar technologies, will be key. … We’re looking for someone who has: •3-5 years of experience with open-source virtualization technologies, including OpenStack or similar platforms. •Hands-on experience with containerization technologies like Docker and Kubernetes, with specific knowledge of Red Hat OpenShift. •Strong understanding of storage solutions (block, file, and object … adhering to best practices for infrastructure deployment and management. Typical Job duties would include: •Design, deploy, and support large-scale private cloud infrastructures using open-source and enterprise-grade solutions, including OpenShift, OpenStack, and other virtualization technologies. •Collaborate with cross-functional teams to integrate private cloud infrastructure with More ❯

how generative AI is built and consumed globally, working alongside a world-class team renowned for record-setting performance and a strong commitment to open-source innovation. Responsibilities Collaborate with researchers, engineers, and product teams to develop innovative platform features and integrate cutting-edge advancements. Architect, build and … Passionate about building tools and systems that enhance the AI developer experience Preferred Experience developing large-scale and high-load production systems. Contributions to open-source AI frameworks or inference systems. Hands-on experience with advanced inference optimisation techniques, such as KVCache, MoE, adaptive batching, or gradient checkpointing. … 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 More ❯

like to acknowledge that almost no candidate checks every box – and that is perfectly fine. If you are passionate about solving complex challenges and open to learning new technologies, we would love to hear from you. Nice to have: Machine Learning: Experience in generative models, LLMs, multi-modal models … and Deep Learning more generally. Open-source: Contributions to and experience in open-source projects. Startup experience: Experience with a startup work environment and wider ecosystem. Why join us? Work in an environment conducting cutting-edge research in AI. An official role title of “Founding Engineer More ❯

its successful execution. Your responsibilities: • Design & deploy Custom workflow solution in Camunda SAAS and Camunda custom Postgres connectors & JOB Workers, Service tasks & user tasks. • Open-Source Facilitation – Nurture an Open-Source delivery model and culture. • Support – Provide development and design support for in-house project teams More ❯

currently 2 engineers + external partners) across complex data and cloud engineering projects Designing and delivering distributed solutions on an AWS-centric stack, with open-source flexibility Working with Databricks, Apache Iceberg, and Kubernetes in a cloud-agnostic environment Guiding architecture and implementation of large-scale data pipelines … Stack Snapshot Languages: Python Cloud: AWS preferred, cloud-agnostic approach encouraged Data: SQL, Databricks, Iceberg, Kubernetes, large-scale data pipelines CI/CD & Ops: Open source tools, modern DevOps principles Why Join? Impactful Work – Help solve security problems that truly matter Ownership & Autonomy – Freedom to shape the stack More ❯

and implementation of cloud-native solutions using AWS services. Architect scalable, secure, and resilient applications using microservices and containerisation technologies. Champion the use of open-source frameworks and API-centric architecture to enable interoperability and reuse. Work closely with development, security, and operations teams to align on best … design principles and event sourcing patterns in application development. Skills & Experience: Proven expertise in delivering AWS-based solutions in secure environments. Strong understanding of open-source technologies and frameworks. Experience with microservice architecture, containerisation (e.g., Docker, Kubernetes), and event-driven systems. Familiarity with structured architecture methodologies (e.g., TOGAF More ❯

We’re partnered with a globally recognised team behind a widely used open-source platform. They’re looking for a Senior Software Engineer with strong Ruby experience to lead on new feature development, performance improvements, and robust testing — all within a fully remote environment. You’ll be part …/CD, and collaborative workflows Confident writing tests (RSpec, Capybara) and monitoring production systems Solid AWS, Docker, and Kubernetes knowledge Bonus: Exposure to cybersecurity, open-source work, or Python/Go Keen to learn more? Send over your CV or drop me a message to discuss. More ❯

you have: Experience building or supporting high-performance data platforms (e.g. stream processing, change data capture) Familiarity with Python, Django, or Golang Contributions to open-source communities or tools Working knowledge of Postgres, Terraform, and CI/CD pipelines (e.g. GitHub Actions) Interest or experience in developer productivity … remote from anywhere in the UK Unlimited holiday Company wide events and team socials High-trust, high-impact culture Work with cutting-edge open-source tools in a collaborative, fast-moving environment Supportive team and strong learning/development culture Interview Process: Intro chat Technical Interview Panel & meet More ❯

unique opportunity to blend practical software engineering with AI research. What does day-to-day look like: Analyze and triage GitHub issues across trending open-source libraries. Set up and configure code repositories, including Dockerization and environment setup. Evaluating unit test coverage and quality. Modify and run codebases … software pipeline setup. Ability to understand and navigate complex codebases. Comfortable running, modifying, and testing real-world projects locally. Experience contributing to or evaluating open-source projects is a plus. Note: Experience working with well-maintained, widely-used repositories (500+ stars) is required. Nice to Have: Previous participation More ❯

environment. Why Join? Be part of a newly established, fast-growing AI team Work on cutting-edge NLP and generative AI tools (e.g., RAG, open-source LLMs) Help automate and modernise business processes across a respected financial organisation Flexible, inclusive culture with purpose-driven values around environmental and … Data Science to scale innovative solutions What You Bring: 5+ years of hands-on experience in Python, ML, and NLP/LLMs Familiarity with open-source LLMs (e.g., LLaMA, Mistral, Qwen) and RAG pipelines Experience building APIs and interactive tools with FastAPI, Streamlit, or Gradio Solid understanding of More ❯

and inspire developers. Gather insights from the community and share actionable feedback with the product team to shape our roadmap. Support and contribute to open source initiatives, helping to maintain our public repositories. What we're looking for; A solid Software Engineering background ideally using Rust or Python … cloud architecture and deployment models. A knack for creating clear, engaging technical content (blog posts, documentation, tutorials). Active participation in developer communities and open source projects . Strong verbal and written communication skills. Perks & Benefits 🎁 Remote-first culture with flexible work schedules. Generous paid time off and More ❯

renowned software engineering division. Their teams deliver enterprise-grade solutions for some of the UK’s most high-profile organisations, using the latest in open-source tooling, DevOps practices and cloud-native design. They are now seeking a Cloud Native Engineer with deep AWS experience to join their More ❯

event-driven design Experience working with cloud platforms (e.g., AWS, GCP, Azure) Familiarity with monitoring, logging, and observability tools Bonus Points For Contributions to open-source projects Contributions to an AI product ⚙️ Tech Stack: Golang, GCP, microservices, Kubernetes, Kafka, MongoDB, Prometheus If scalability, security, databases and performance is More ❯

build a new cloud-native IaC platform. Develop software using technologies such as Docker Compose, Terraform, Kubernetes (K8s), Python, and Go. Provision and orchestrate open-source services including Loki, Redis, Grafana, Authentik, Netbird, among others. Design and implement CI/CD pipelines to streamline deployment processes. Initially focus More ❯

Understanding of or working with AI/ML algorithms and data science. Docker and Kubernetes. Experience with Large Language Model stacks, vector databases, Haystack, open-source (Mistral, Falcon, Llama 3), and closed-source models like GPT-4 and Claude. Knowledge of Git version control, branching, and code More ❯

documentation). Proficiency in applying SOLID principles and Test-Driven Development methodologies. Experience with cloud products, Kubernetes, or other orchestration tools. API management experience. Open-source contributions. Highly organised with exceptional attention to detail. Strong communication skills. Passion for continuous improvement in the software delivery lifecycle. Experience influencing More ❯

Vitest, Jest, React Testing Library Angular : Jasmine, Karma, TestBed E2E Testing : Experience with Playwright Tooling Experience with: Static code analysis tools (ESLint, Prettier, Sonar) Source control (Git) and workflows (Pull Requests, trunk-based development, Gitflow) Frontend build tools/bundlers: Webpack, Vite, Rollup DevOps & CI/CD CI tools … HTTPS, CORS, OAuth, JWT RESTful API integration CSS preprocessors (SASS, LESS) and styling libraries (CSS Modules, Styled Components, TailwindCSS) Nice to Have Contributions to open-source projects Experience with performance optimization and accessibility best practices RE Partners is a technology consulting firm for those leaders that want to More ❯

Do Design, build, and optimise resilient, high-performance infrastructure. Develop and maintain CI/CD pipelines to enhance deployment efficiency. Implement cloud-native and open-source solutions to improve reliability and scalability. Proactively monitor and troubleshoot production systems, ensuring uptime and performance. Automate infrastructure provisioning and configuration using More ❯

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 More ❯

Comfortable working on distributed systems and improving developer workflows A product mindset and a collaborative approach to problem-solving Experience with Kafka, gRPC, or open-source contributions is a bonus If you’re a Platform Engineer who thrives in high-trust, fast-moving environments and enjoys building tools More ❯

Java Exposure to crypto, trading, or finance-related platforms Familiarity with Docker, Kubernetes, CI/CD (GitHub Actions, GitLab, Jenkins, etc.) Prior contributions to open-source or side projects in Rust 🌍 Why Join? Work on cutting-edge FinTech systems used globally Be part of a high-caliber engineering More ❯

help you get there: Understanding of cloud computing security concepts Experience in relational cloud-based database technologies like Snowflake, BigQuery or Redshift Experience in open-source technologies like Spark, Kafka, Beam understanding of Cloud tools such as AWS, Microsoft Azure or Google Cloud Familiarity with DBT, Delta Lake More ❯

agile environment. Key Responsibilities: Architect and deploy custom workflow solutions using Camunda SaaS, including custom PostgreSQL connectors and job workers Drive delivery in an open-source culture and contribute to reusable components Build performant and scalable services aligned to customer-centric design Collaborate across engineering, architecture, and business More ❯