Top Python Developer Jobs in London

Lead design and implement IAM-focused public cloud platform services. Develop and maintain production code, drive architecture and reliability, automate remediation, lead reviews, mentor engineers, and collaborate across platform and trust teams to deliver secure, scalable cloud services.

Build and maintain secure, production-ready ML solutions and cloud frameworks using Python and AWS. Collaborate with data scientists, platform teams, SRE, and engineering communities to integrate, deploy, monitor, and scale AIML systems following SDLC and MLOps practices.

Lead software engineer on AI/ML data platforms building secure, cloud-native production systems. Designs, implements, debugs, and reviews code, drives adoption of AI-assisted engineering practices, mentors junior engineers, evaluates vendors, and ensures operational stability and secure SDLC practices.

Lead global software projects for the Strategic Index platform, designing, developing, and testing applications. Collaborate with quant, trading, and business teams, apply Agile practices, drive adoption of AI-assisted engineering, ensure quality, and deliver production-ready solutions.

Design and build Python services, pipelines, testing frameworks, data analysis tools, and lifecycle management systems for quantitative market and credit risk models. Implement auditable AI/ML and LLM-based automation for documentation, data quality, testing, and workflow assistance. Collaborate with quants, validators, data engineers, and program leaders while promoting secure engineering practices, mentoring developers, and contributing to technical design.

Build and own backend platform capabilities enabling data scientists, machine learning engineers, and simulation engineers to create, train, and deploy physics-informed models. Collaborate cross-functionally with backend, frontend, design, data science, and simulation teams. Develop scalable, observable production software using Python and Go, including testing, containerization, CI/CD, authentication, event-driven messaging, and Kubernetes-based applications.

Develop and own scalable backend software supporting genomic research, clinical decision-making, and healthcare innovation. Responsibilities include building Python microservices and REST APIs on AWS, working with relational databases and identity platforms such as Okta, developing automated tests, troubleshooting issues, collaborating with engineering and QA teams, and leading feature development. The role also involves technical collaboration with suppliers and mentoring junior engineers.

Build and maintain backend services and APIs for a fintech platform using modern Python tools. Design scalable, secure systems, integrate third-party services, implement async and event-driven workflows, investigate distributed system issues, contribute to architecture and code quality, and mentor peers in a collaborative product team.

Design and build scalable Python microservices and APIs for an AI-powered code modernization and migration platform. Develop MCP servers and agent tools, orchestrate agentic and multi-agent workflows, and manage backend service lifecycles. Ensure services are robust, observable, tested, and production-ready while shaping tool-calling, state-management, and distributed-system architecture. The role also involves Git workflow automation, developer tooling, and potentially containerized deployments and agent-facing interfaces.

Design, implement and maintain backend systems and services for the Horizon platform. Build cloud-native AWS HTTP APIs and event-driven microservices (gRPC) in Rust and Python, design data models for complex trades, work with MySQL, MongoDB and DynamoDB, collaborate with quants, front-end and platform engineers, engage with clients and stakeholders, and deliver performance-critical, observable, testable code.

As a DevOps Software Engineer, you will support the hx Renew platform, provide technical guidance, and mentor team members while tackling complex engineering tasks.

The Core Developer will focus on creating and maintaining systems for trading activities, including data capture, reconciliation, and automated settlement, primarily using Python and some C++.

Lead the adoption of AI-native software development practices as a hands-on Principal Engineer. Mentor engineers in tools such as GitHub Copilot, Claude Code, Codex, Cline, Kiro, and Cursor; introduce innovative workflows; solve complex technical problems; and collaborate with engineering and product leaders to translate AI-driven productivity and capabilities into product value. The role requires strong backend development skills, technical leadership, communication, and practical experience with generative AI tools.

Senior Software Engineer responsible for advancing AI-assisted software development across engineering teams. The role combines hands-on backend coding with mentoring, code reviews, technical leadership, workflow innovation, and adoption of tools such as GitHub Copilot, Claude Code, Codex, Cline, Kiro, and Cursor. The engineer will demonstrate AI-powered development practices, collaborate with technical and product stakeholders, and communicate productivity and product-value improvements.

The Software Developer will enhance liquidity access, develop data feeds, and ensure software stability while collaborating across teams. Responsibilities include coding, testing, and production support.

The Senior Backend Software Engineer will design, build, and maintain scalable backend systems. Responsibilities include collaboration with teams, API implementation, and ensuring best practices in software engineering.

The role involves developing and supporting data processing pipelines, collaborating with ML Engineers, and improving infrastructure while mentoring team members.

The role involves building a scalable integrated payment and checkout architecture using Python, ensuring smooth partner integrations, and enhancing onboarding automation.

You will lead complex projects involving Python systems, collaborating with sales teams, mentoring developers, and ensuring operational support for trading systems.

Design and develop scalable server-side components, integrate APIs, automate workflows, and collaborate with teams on financial solutions.

Design, build, and operate Python backend services, data processing pipelines, and internal web applications. Integrate platforms with Microsoft ecosystem, deploy containerized cloud-native apps, improve reliability and observability, support CI/CD, and collaborate with cross-functional teams to deliver data-driven forecasting and analytics solutions.

In this role, you'll develop reliable Python systems for trading operations, collaborate on projects, debug issues, and provide operational support.

Design and maintain scalable Java backend systems, REST APIs, microservices, and distributed architectures. Lead technical and architectural decisions, promote testing and automation, mentor engineers, collaborate with clients and cross-functional teams, and evaluate emerging technologies including AI to improve engineering delivery.

The role involves developing and maintaining Python micro-services for a proprietary trading platform, collaborating with traders and global teams, and integrating with analytics libraries.

Lead development of the Jamf Insights web application, design and implement features in a microservice architecture, build and test APIs, troubleshoot performance, produce designs, complete work end-to-end, and communicate technical concepts to stakeholders across Product, Cloud, and Support.