senior python developer jobs in London

About InvestEngineAbout InvestEngineWe're a London-based fintech on a mission to make ETF investing simple and accessible. Over 150,000 clients have trusted us with over £3.5 billion in assets — and we're just getting started.We've been featured by MoneyWeek, Finder and Forbes, and we're growing fast with big ambitions.About the RoleAbout the RoleWe're...

We are seeking a Senior Software Engineer to join the Risk Services team within Global Markets . This role focuses on designing and building scalable, distributed systems that support risk data processing, analytics and reporting workflows . The ideal candidate will have strong experience across Java and Python-based backend systems , with a solid...

BigHand Limited is seeking a Principal Backend Engineer to own data engineering and the AWS platform powering our Agentic AI systems. This senior individual contributor role sits at the heart of a small team, focusing on Python and AWS infrastructure that underpins our AI capabilities.You will work with data scientists, full-stack AI engineers and legal...

A market-leading trading firm in London is seeking a Software/Data Developer to join their data-focused team. You will develop a greenfield data ingestion platform using OO Python and design ETL pipelines. The ideal candidate has over 4 years of experience in OO Python development and finance, with a proven track record in building large-scale data...

Octopus Electric Vehicles, part of the Octopus Energy Group, is hiring a Senior Fullstack Software Engineer (Python & React) to join our product and engineering team in the UK. You’ll build APIs, develop frontend experiences, and create scalable systems powering our electric car leasing platform.You’ll work with Python, GraphQL, React/Next.js, PostgreSQL...

Top Tier Asset Management House in London seeks a Senior Python AI Software Engineer to lead production-grade AI systems within modern cloud-native architectures. You will guide technical direction, shape AI products, and mentor engineers across global teams.This hands-on leadership role focuses on reusable AI capabilities, security, observability, and...

83zero Ltd is seeking a Senior Python Developer to lead GenAI projects. You’ll write production-grade Python, build APIs and AI applications, and bring GenAI/LLM ideas from POC to production for enterprise clients.This permanent, hybrid role involves 2 days per week onsite with locations including London and other UK cities. You’ll work with OpenAI,...

J.P. Morgan is seeking a Senior Lead Software Engineer to drive data ingestion, transformation, and Data Product acceleration on a federated data platform for Asset Management.You will lead design and implementation of AI-ready capabilities and ensure secure, scalable delivery across teams including Quantitative Research. As a senior technical leader, you...

Sanderson Recruitment is seeking a skilled software engineer for a major UK Defence and National Security programme based in London, Manchester, or Cheltenham. The role focuses on building and delivering solutions in a highly secure environment, with on-site collaboration at core locations.Ideal candidates have strong Python or Java skills, AWS proficiency,...

YLD is a remote-first consultancy specialising in software engineering, product design, and data, with teams across London, Lisbon, and Porto. We seek a Senior Software Engineer to build scalable, fault-tolerant architectures and deliver outstanding products in a fast-paced environment.You will collaborate with cross-functional teams to design, implement,...

Oxford Knight is assisting a leading global HFT fund in hiring a Senior Python/Rust Engineer for its Core Dev team in London. The role combines startup energy with financial market scale, focusing on Python and Rust infrastructure and applications across multiple domains.You will sit within the core development group, mentor junior engineers, coordinate...

La Fosse is seeking a Senior Software Engineer to join a government-focused AWS/Python/Terraform environment on a contract basis. The role spans DevOps automation, cloud engineering and software delivery, requiring hands-on AWS, Terraform, Python, and CI/CD expertise.You will design, build and automate secure AWS cloud environments, develop IaC with...

We are recruiting Full-Stack Software Engineers for a game changing biotech in West London to build a cloud based data analysis platform that will play a key part in the future of scientific discovery. Working in a small, talented and motivated team using state of the art tools including powerful AI to augment the development life cycle and speed up...

McGregor Boyall is seeking a Python Developer with strong Market Risk knowledge to join a London-based risk technology initiative. You will design, build and enhance scalable risk applications used by risk managers across multiple asset classes, including equities, FX, fixed income, and mortgages.The role involves working on a greenfield platform,...

J.P. Morgan is seeking a senior software engineering professional to drive AI-assisted development practices across the SDLC in a regulated financial services environment.You will design, implement, and govern secure production code, lead high-impact initiatives, and collaborate with vendors and internal teams to ensure robust, scalable solutions. Applicants...

J.P. MorganChase is seeking a Senior Software Engineer with expertise in AWS and Python, and a passion for Machine Learning, to help engineer and deploy innovative ML solutions into production.You will join the Applied AI/ML Software Engineering team, collaborating with technology teams across the firm, contributing to both new and ongoing projects.In this...

J.P. Morgan is seeking a Sr. Lead Software Engineer within the Commercial & Investment Bank Compute Runtime Platforms to design, build, and deliver trusted market-leading tech products in a secure, scalable way.You will work with cross-functional teams to enhance performance and leverage GenAI to optimize large compute environments, using Python, C++, and Go...

La Fosse, in London, seeks a Senior Platform Engineer (AWS, Python and/or Go) for a hybrid role requiring 1 day per week in the Victoria office. You will build and evolve internal developer platforms, cloud-native solutions, AI infrastructure and client-facing products.Responsibilities include designing production-grade services, developing tooling, shaping...

Oliver Bernard is seeking a Senior Product Engineer (Python/React) to join their tech for good organization in London. You will be a key member of the software team, responsible for writing high-quality code and shaping engineering practices. This role requires hands-on experience in building fullstack applications, along with strong skills in Python, React,...

T. Rowe Price in the UK is looking for a senior Python developer to join its ESG Technology team.You will work on in-flight and greenfield projects, leveraging a mix of Python, Pandas/Polars, Postgres, Snowflake, and cloud technologies to deliver robust data analytics in a fast-moving financial services environment. You will engage with business and...