26 to 50 of 127 Open Source Jobs in the City of London

to £200k + Equity | London Maze is partnering with a stealth-mode startup that's rebuilding core banking from the ground up. They’re creating the world’s first open-source, AI-native "Thin Ledger" —set to replace legacy infrastructure at Tier 1 banks. We're looking for a Senior Engineer specialising in Go to contribute to v1 … distributed, multi-region infra with five-nines reliability Contribute to backend, DevOps, and CI/CD decision-making Embed AI into engineering workflows & ops Self-motivated, problem-solving mindset; open to non-traditional backgrounds. You should have: Expert backend skill ideally in Golang, or Rust, Zig or C. Deep expereince building distributed systems from scratch. Experience in greenfield projects … Work with a high-caliber team, fast-paced and product-minded founders who have worked in some of the most recognised tech businesses in the world. Help define an open-source platform from day one. Clear path to tech unicorn status with fruitful equity included. Recently raised 8 figures in funding. Apply within if your skillset matches! Please More ❯

to £200k + Equity | London Maze is partnering with a stealth-mode startup that's rebuilding core banking from the ground up. They’re creating the world’s first open-source, AI-native "Thin Ledger" —set to replace legacy infrastructure at Tier 1 banks. We're looking for a Senior Engineer specialising in Go to contribute to v1 … distributed, multi-region infra with five-nines reliability Contribute to backend, DevOps, and CI/CD decision-making Embed AI into engineering workflows & ops Self-motivated, problem-solving mindset; open to non-traditional backgrounds. You should have: Expert backend skill ideally in Golang, or Rust, Zig or C. Deep expereince building distributed systems from scratch. Experience in greenfield projects … Work with a high-caliber team, fast-paced and product-minded founders who have worked in some of the most recognised tech businesses in the world. Help define an open-source platform from day one. Clear path to tech unicorn status with fruitful equity included. Recently raised 8 figures in funding. Apply within if your skillset matches! Please More ❯

to maximise efficiency Automate model experimentation, tuning and retraining in partnership with research teams Work with infrastructure specialists to optimise workflows and reduce compute costs Assess and integrate emerging open-source tools to enhance ML development and deployment Skills and Experience 5+ years’ experience in machine learning with a focus on training and inference systems Strong programming expertise … Hands-on experience with GPU acceleration and distributed training (Horovod, NCCL or similar) Background in real-time, low-latency ML pipelines Familiarity with cloud and orchestration technologies Contributions to open-source ML or distributed systems projects are advantageous Why This Firm? Direct impact: your work feeds into live trading strategies, not just experiments. Buy-side edge : fewer layers More ❯

AI to simplify tasks, save time, and enhance learning and creativity. Our technology is designed to integrate seamlessly into daily working life. We democratize AI through high-performance, optimized, open-source and cutting-edge models, products and solutions. Our comprehensive AI platform is designed to meet enterprise needs, whether on-premises or in cloud environments. Our offerings include … mindset and willingness to "roll up your sleeves" to get things done. Commitment to responsible AI, including fairness, transparency, and accountability in content usages. Knowledge of US copyright law, open-source licensing, or AI/ML technologies is a strong plus. Benefits Competitive cash salary and equity Food : Daily lunch vouchers Sport : Monthly contribution to a Gympass subscription More ❯

collection, analysis and reporting across the organisation Managing the relationship with an external app development partner to ensure the product integrates effectively with AI analysis tools Identifying and configuring open-source AI tools for data visualisation, search and reporting Coaching and training teams on responsible, ethical and practical AI adoption Acting as an internal AI champion to inspire … curiosity and experimentation What we’re looking for: Strong experience leading AI implementation or transformation within a consultancy or data-focused organisation Hands-on familiarity with open-source AI platforms, NLP or data visualisation tools Proven ability to translate technical concepts into practical solutions for non-technical users A collaborative and coaching mindset, with an enthusiasm for using More ❯

collection, analysis and reporting across the organisation Managing the relationship with an external app development partner to ensure the product integrates effectively with AI analysis tools Identifying and configuring open-source AI tools for data visualisation, search and reporting Coaching and training teams on responsible, ethical and practical AI adoption Acting as an internal AI champion to inspire … curiosity and experimentation What we’re looking for: Strong experience leading AI implementation or transformation within a consultancy or data-focused organisation Hands-on familiarity with open-source AI platforms, NLP or data visualisation tools Proven ability to translate technical concepts into practical solutions for non-technical users A collaborative and coaching mindset, with an enthusiasm for using More ❯

AWS Certified Data Analytics, etc.). Knowledge of data engineering best practices and testing frameworks. Strong stakeholder engagement and consulting skills, including requirements elicitation and workshop facilitation. Contribution to open-source projects, research publications, or professional communities. More ❯

AWS Certified Data Analytics, etc.). Knowledge of data engineering best practices and testing frameworks. Strong stakeholder engagement and consulting skills, including requirements elicitation and workshop facilitation. Contribution to open-source projects, research publications, or professional communities. More ❯

to establish coding standards and best practices across teams AI/ML Expertise Strong understanding of machine learning frameworks (TensorFlow, PyTorch, Scikit-learn) Experience with LLM integration (OpenAI, Anthropic, open-source models) Knowledge of RAG architectures, prompt engineering, and vector databases (Pinecone, Weaviate) Experience with MLOps tools and monitoring model performance in production Automation Architecture Deep knowledge of More ❯

using Kafka and Confluent components. You will collaborate with data engineers, architects, and DevOps teams to deliver robust streaming solutions. Required: • Hands-on experience with Apache Kafka (any distribution: open-source, Confluent, Cloudera, AWS MSK, etc.) • Strong proficiency in Java, Python, or Scala • Solid understanding of event-driven architecture and data streaming patterns • Experience deploying Kafka on cloud More ❯

using Kafka and Confluent components. You will collaborate with data engineers, architects, and DevOps teams to deliver robust streaming solutions. Required: • Hands-on experience with Apache Kafka (any distribution: open-source, Confluent, Cloudera, AWS MSK, etc.) • Strong proficiency in Java, Python, or Scala • Solid understanding of event-driven architecture and data streaming patterns • Experience deploying Kafka on cloud More ❯

/or Windows systems About you (ideally): Demonstrate a working knowledge of DevOps and Platform Engineering practices such as CI, CD, Infra as Code, Cloud, Monitoring A passion for open-source programming or commercial tooling A strong background in ability to lead initiatives Experience in building up and mentoring teams highly desirable Being part of implementing end to More ❯

/or Windows systems About you (ideally): • Demonstrate a working knowledge of DevOps and Platform Engineering practices such as CI, CD, Infra as Code, Cloud, Monitoring • A passion for open-source programming or commercial tooling • A strong background in ability to lead initiatives • Experience in building up and mentoring teams highly desirable • Being part of implementing end to More ❯

on experience with cloud platforms (AWS, GCP, Azure) and Kubernetes • Familiarity with CI/CD pipelines and infrastructure automation (Ansible, CFK) Required: • Experience with other Kafka platforms such as Open-source Kafka, Cloudera Kafka, AWS MSK, etc. • Solid understanding of Kafka architecture and operational management in enterprise environments. • Experience in professional services or implementation consulting for SaaS products More ❯

on experience with cloud platforms (AWS, GCP, Azure) and Kubernetes • Familiarity with CI/CD pipelines and infrastructure automation (Ansible, CFK) Required: • Experience with other Kafka platforms such as Open-source Kafka, Cloudera Kafka, AWS MSK, etc. • Solid understanding of Kafka architecture and operational management in enterprise environments. • Experience in professional services or implementation consulting for SaaS products More ❯

toolsets for API development. Some 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, and academic research in machine learning More ❯

scale, data-driven applications Product-focused approach, ideally within fast-paced tech organisations (start-ups or scale-ups) Knowledge of Kafka, Cassandra, gRPC, and microservices is a strong advantage Open-source contributions are beneficial If you’re a Senior Go Developer looking for a challenging 6-month contract with a forward-thinking tech company, apply today. We are More ❯

logging) Confident debugging and resolving issues in complex distributed systems Product-oriented mindset with a collaborative approach to improving developer experience Bonus: experience with Kafka, gRPC, or contributing to open-source projects If you’re a Senior Platform Engineer who thrives on building tools and systems that empower developers and accelerate delivery, apply today. The client is looking More ❯

logging) Confident debugging and resolving issues in complex distributed systems Product-oriented mindset with a collaborative approach to improving developer experience Bonus: experience with Kafka, gRPC, or contributing to open-source projects If you’re a Senior Platform Engineer who thrives on building tools and systems that empower developers and accelerate delivery, apply today. The client is looking More ❯

Technology team is at the forefront of innovation, creating advanced systems and tools that help teams understand complex behaviors, forecast trends, and manage risk more effectively. With a modern, open-source tech stack and a commitment to excellence, we tackle complex, high-impact challenges at scale-ranging from cloud-native infrastructure and machine learning platforms to real-time More ❯

AI or automation into operational workflows (e.g., monitoring, alerting, or data pipelines) Some knowledge of Atlassian Jira & Confluence Interest in emerging technologies (AI/ML, blockchain, IoT, edge computing) Open-source contributions or personal tech projects you're proud of Other Highly Desirable Skills: Previous Application Support - Ideally Trading/Market Data - Futures & Options Trading/Settlement Systems More ❯

to gain buy-in and feedback on proposals and designs. Required Knowledge & Experience: Essential: Strong proficiency in C# at a commercial level. Solid experience with .NET Core and related open-source technologies. Knowledge of Object Orientation, SOA, and relevant design patterns. Experience with modern software development practices, including agile methodologies , version control, code reviews, and continuous integration. Understanding More ❯

sits within the fast-paced Connectivity Software team, part of Sky Home Communications. We lead development on the RDK WAN Manager and Broadband Application Framework-key components of the open-source RDK-B platform used in millions of broadband devices worldwide. As a Software Architect , you'll define the software component architecture for our connectivity products, ensuring robust … environments with the ability to manage multiple priorities effectively. Creative and analytical thinker, with meticulous attention to detail and strong problem-solving and debugging skills. Experience with RDK-B, Open WRT, or PRPL WRT is a significant advantage. Team overview Product Delivery Want to deliver brilliant products and unmissable entertainment that grips millions of households? Our 1000 strong, Product More ❯

sits within the fast-paced Connectivity Software team, part of Sky Home Communications. We lead development on the RDK WAN Manager and Broadband Application Framework-key components of the open-source RDK-B platform used in millions of broadband devices worldwide. As a Software Architect , you'll define the software component architecture for our connectivity products, ensuring robust … environments with the ability to manage multiple priorities effectively. Creative and analytical thinker, with meticulous attention to detail and strong problem-solving and debugging skills. Experience with RDK-B, Open WRT, or PRPL WRT is a significant advantage. Team overview Product Delivery Want to deliver brilliant products and unmissable entertainment that grips millions of households? Our 1000 strong, Product More ❯

infrastructure workflows for engineering teams Collaborating with senior engineers and product leads on design and implementation Contributing to technical strategy, team mentoring, and engineering standards Opportunity to work on Open-source projects focusing on AI agents What They’re Looking For: Strong software engineering background, ideally writing Golang Solid experience with Kubernetes Experience in cloud environments - GCP preferred More ❯