Top Software Engineer Jobs in London

The AI Software Engineer will train large-language models, compare code snippets, and provide feedback to improve AI-generated code. Requires strong C++ skills and attention to detail.

The role involves training large-language models by evaluating and refining code snippets, providing feedback, and maintaining an RLHF pipeline. Candidates need strong Python skills and code review expertise.

Join our team to help train large-language models by evaluating and improving AI-generated code, leveraging your coding and communication skills.

Help train large-language models to write production-grade code by ranking, repairing, and providing feedback on AI-generated code snippets, with a focus on logical correctness and performance.

As an AI Software Engineer, you'll help train large-language models in Rust by comparing code snippets, repairing AI-generated code, and providing feedback to enhance model learning.

This role involves training large language models to improve code through evaluation and feedback, focusing on correctness, efficiency, and communication.

As a Software Engineer on the Storage Infrastructure team, you will design, build, and operate systems for managing large-scale research data securely and reliably across multiple regions.

Build and operate Kubernetes clusters, optimize infrastructure for AI workloads, and collaborate with researchers to enhance model training systems.

Develop and implement reliability features, improve system performance, provide L2 support, and create automation tools for operational stability.

Software Engineers at Jane Street engage in collaborative technology-driven work, using functional programming with OCaml and Python for various business problems.

Join the Benchmarking team as a Full Stack Engineer, focusing on backend Java development and frontend UI/UX for benchmarking infrastructure.

As a Principal Software Engineer, you will lead backend projects, enhance engineering stability, and drive cross-team collaboration within a large engineering organization.

The Senior Software Engineer will develop a travel-related web product, integrate APIs, and design system architecture while mentoring junior colleagues.

As a Senior Software Engineer at Cloudflare, you will design, build, and maintain scalable software systems, focusing on network services and Zero Trust platforms, while collaborating with product managers and cross-functional teams.

The Staff Software Engineer will develop services for safeguarding customer funds, improve system reliability, and ensure compliance with financial regulations, collaborating cross-functionally.

Design, build and maintain production-grade software, APIs, dashboards and shared libraries to support scientific and operational workflows. Provide operational support, testing, code review, documentation and secure, maintainable releases in containerised Linux environments.

Responsible for designing and optimizing blockchain product architecture, developing smart contracts, and ensuring security best practices in the DeFi ecosystem.

Embed within delivery teams to translate private markets domain knowledge into testable requirements and automated tests. Define test cases, validate financial data structures, identify accuracy gaps, contribute to Playwright E2E, API and service testing, and collaborate with engineers and product to ensure financial logic correctness and data integrity.

Build and own frontend features end-to-end for DeepL's Expert Editor platform: prototype solutions, run experiments, ensure customer impact, collaborate cross-functionally, mentor peers, participate in on-call rotations, and deliver maintainable, well-tested code.

Seeking a Software Engineer for Regulatory Reporting to build backend systems ensuring compliance. Responsibilities include system design, data integration, and audit support.

As a Software Engineer, you'll deliver high-quality software, own projects from concept to deployment, and collaborate with cross-functional teams. You'll contribute to the product direction and improve engineering processes while mentoring peers.

The Software Engineer III implements Scala/Spark pipelines for metric computation, develops Java-based backend services, and collaborates within a cross-functional team to ensure reliable workflows in Big Data environments.

The Staff Software Engineer will architect and develop software for enterprise fleets, collaborate on design, and lead responses to production issues.

As a Pega Software Engineer, you will design, develop, and implement software, applying Agile methods while collaborating with stakeholders and improving processes.

Design and develop scalable cloud-native backend services for Battery Energy Storage Systems while integrating data analytics and frontend components. Collaborate on IoT systems and DevOps practices for system reliability and performance optimization.