Top Python Developer Jobs in London

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 Risk Software Developer will enhance Marex's Risk Engines and integrate applications while collaborating with teams to improve business processes and reporting. Key responsibilities include coding, documentation, quality assurance, and stakeholder communication in a fast-paced environment.

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

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

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.

As a Python Developer, you will design and maintain robust APIs, manage data pipelines, and integrate cloud platforms for the Global:IQ platform.

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

The Back-end Developer will lead the architectural rebuild in Java Spring Boot, optimize connectors, migrate business logic, and ensure system reliability.

As a Senior Python Engineer, you'll design and build the core infrastructure for AI forecasting systems, integrating data ingestion and reasoning mechanisms while contributing to technical strategy and team growth.

The Senior Python Developer is responsible for designing, developing, and maintaining software systems using Python. This role includes mentoring junior developers, ensuring code quality, and collaborating with cross-functional teams to meet project requirements.

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

Design and build scalable applications using JavaScript or Python, implement data storage solutions, optimise performance, ensure testing and CI/CD practices, collaborate with clients and technical leaders, and maintain high code quality through reviews and agile delivery.

Design, develop, and maintain components of the LNIP intelligence core platform, including a semantic search API and internal data curation tool. Implement secure coding standards, unit testing, code reviews, and cloud deployments. Use agentic development tools responsibly and work with complex data models, vector embeddings, SQL and PySpark to support intelligent software systems.

Translate regulatory and business requirements into technical specifications, design and deliver production Python code, own parts of the product portfolio, collaborate with PMs/BAs and engineers, improve architecture, drive testing and best practices (TDD, automated tests), and consider non-functional requirements like performance and security.

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.

Design, implement, and deliver full-stack features for the Validus Horizon platform. Build and maintain ETL/data pipelines and integrations, own small-to-medium projects, improve system performance and scalability, collaborate with stakeholders and clients, mentor team members, and present technical solutions and roadmaps to drive product and client success.

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

As a Quant Developer, improve research frameworks, develop tools for trading strategies, and support the quantitative research team on-site.

We are seeking a software engineer to build and validate resilient distributed systems, enhance CI pipelines, and improve testing strategies for cloud applications.

The Backend Software Engineer will develop and maintain backend systems for data processing related to coffee farming, utilizing Python and PostgreSQL. Responsibilities include feature development, problem-solving, and adapting systems to regulatory changes while ensuring system resilience.

Partner with quantitative traders and researchers to design, build, deploy, and support production-grade Python reporting and analytical tools, integrate alternative datasets, and deliver insights for trading strategies and performance monitoring.

Design, build, and maintain components of the LNIP intelligence core platform, including a semantic search API and internal data curation tool. Implement secure coding standards, unit testing, code reviews, and use agentic development tools responsibly to accelerate development while ensuring quality.

Develop and maintain derivatives credit risk applications, optimize performance, and support CI/CD processes while collaborating with front office teams.

The Senior Software Developer will create and enhance AI prototypes, ensure technical standards, support backend service integrations, and collaborate with multidisciplinary teams.