Python/Polygot Engineer (Market Data) - Inside IR35 - Up to £700 per day

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 data consumption.
• Develop high-performance APIs and services using Python, REST and gRPC.
• Design and manage large-scale NoSQL data stores (MongoDB, HBase or similar).
• Investigate production issues, perform root cause analysis (RCA) and deliver end-to-end resolutions.
• Translate business requirements into scalable technical solutions.
• Collaborate with Trading, Analytics and Data teams to deliver robust, high-quality solutions.
• Drive platform performance, scalability and continuous improvement.

Essential Skills

• Strong full-stack development experience across frontend, backend APIs and databases.
• Excellent Python development skills (polyglot experience beneficial).
• Experience building REST and gRPC services.
• Hands-on experience with MongoDB, HBase or other NoSQL databases.
• Strong debugging, troubleshooting and problem-solving skills.
• Experience working with large datasets and data-intensive applications.
• Ability to take ownership of issues through to resolution.

Preferred Experience

• Front Office trading environments (Fixed Income, FX or Derivatives).
• Strong understanding of market data, trade lifecycle, pricing and risk.
• Experience developing enterprise market data or trading platforms.
• Knowledge of market data modelling, instrument reference data or metadata-heavy systems (e.g. FRTB taxonomies).
• Experience integrating with downstream analytics platforms and distributed systems.
• Exposure to cloud platforms, data streaming or real-time processing technologies.
• Previous experience within global banking or financial services.

Experience: Approximately 9–15 years' experience (flexible for exceptional candidates).