1 to 25 of 76 Permanent Open Source Jobs in Essex

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 ❯

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 ❯

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 ❯

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 ❯

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 ❯

Education: Creating and delivering technical workshops, webinars, and live coding sessions Product Feedback: Gather and synthesize community feedback to help shape our product roadmap Open Source: Contribute to open source projects and help maintain our public repositories They are looking for someone from a strongsoftware engineering … The successful candidate will have demonstrated ability to write clear, engaging technical content (blog posts, tutorials, documentation) and experience participating in developer communities and open source projects. Anyone who already has a strong presence in technical communities, experience of public speaking or who has worked in a small More ❯

Education: Creating and delivering technical workshops, webinars, and live coding sessions Product Feedback: Gather and synthesize community feedback to help shape our product roadmap Open Source: Contribute to open source projects and help maintain our public repositories They are looking for someone from a strongsoftware engineering … The successful candidate will have demonstrated ability to write clear, engaging technical content (blog posts, tutorials, documentation) and experience participating in developer communities and open source projects. Anyone who already has a strong presence in technical communities, experience of public speaking or who has worked in a small More ❯

Education: Creating and delivering technical workshops, webinars, and live coding sessions Product Feedback: Gather and synthesize community feedback to help shape our product roadmap Open Source: Contribute to open source projects and help maintain our public repositories They are looking for someone from a strongsoftware engineering … The successful candidate will have demonstrated ability to write clear, engaging technical content (blog posts, tutorials, documentation) and experience participating in developer communities and open source projects. Anyone who already has a strong presence in technical communities, experience of public speaking or who has worked in a small 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 ❯

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 ❯

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 ❯

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 ❯

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 ❯

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 ❯

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 ❯

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 ❯

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 ❯

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 ❯

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 ❯

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 ❯

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 ❯