Senior Full Stack Python Engineer - Up to £700 per day

Senior Full Stack Engineer – Market Data Platforms (Python / gRPC / MongoDB)

We are seeking a Senior Full Stack Engineer to build and support market data platforms within a financial markets technology environment. The role focuses on developing end-to-end solutions across UI, APIs and data layers, supporting critical market data analytics, distribution and consumption workflows.

The ideal candidate will have strong full-stack development experience, exposure to market data systems and the ability to deliver scalable solutions in high-performance, production-critical environments.

Key Responsibilities

• Design, develop and maintain full-stack applications across UI, backend services and data layers.
• Build and enhance market data platforms supporting analytics, distribution and consumption use cases.
• Develop APIs and services using modern technologies, including gRPC, for efficient data access.
• Work with large-scale data stores, such as MongoDB, HBase or similar technologies, to manage structured and semi-structured market data.
• Troubleshoot production issues, perform root cause analysis (RCA) and drive fixes through to resolution.
• Translate ambiguous business requirements into practical, scalable technical solutions.
• Collaborate with trading, analytics and data teams to deliver robust solutions.
• Contribute to platform improvements, performance optimisation and system scalability.

Must-Have Skills

• Strong full-stack development experience across UI, backend APIs and databases.
• Proficiency in Python or polyglot backend development.
• Experience building and consuming REST APIs and/or gRPC services.
• Hands-on experience with NoSQL databases, such as MongoDB, HBase or similar.
• Strong debugging and problem-solving skills in production environments.
• Proven ability to own technical issues end-to-end, including RCA and resolution.
• Experience working with large datasets and data-intensive applications.

Domain Experience

• Understanding of Front Office trading environments, including Fixed Income, FX and derivatives.
• Strong knowledge of market data concepts, trade lifecycles, data flows and risk/pricing dependencies on market data.
• Experience with enterprise trading and market data platforms.
• Understanding of regulatory and compliance considerations within financial services.

Technical & Data Stack

• Experience with MongoDB, HBase or similar distributed data stores.
• Familiarity with gRPC-based services and high-performance communication.
• Understanding of market data modelling, including metadata-heavy schemas, instrument data and FRTB taxonomies.
• Experience integrating analytics platforms and downstream systems.
• Exposure to polyglot architectures and distributed systems.

Good-to-Have

• Experience with market data platforms or vendor data systems.
• Exposure to data streaming or real-time processing frameworks.
• Familiarity with cloud and distributed infrastructure environments.
• Previous experience in global banking or financial services.

Experience: Approximately 9–15 years, with flexibility for candidates demonstrating strong technical and relevant domain expertise.

If you're an experienced Full Stack Engineer interested in building scalable market data platforms, get in touch to discuss the opportunity.