Python Developer - sought by leading investment bank based in Canary Wharf - Contract - Hybrid Key Responsibilities Develop and optimize Python calculators for: Historical index back-testing Daily pricing and index computation Weighting and rebalancing logic Attribution and decomposition analytics Build robust APIs using FastAPI or Flask Collaborate directly with business users to gather requirements and iterate quickly Implement testing, versioning, and data validation processes Ensure integration with internal data sources and reporting tools Required Skills 5 years of Python development experience, ideally in financial services or commodities Strong proficiency in Pandas, NumPy, and time-series data manipulation Proven experience with FastAPI or Flask Familiarity with large datasets and real-time data pipelines Excellent debugging, profiling, and performance optimization skills Strong communication skills and ability to work with non-technical stakeholders Preferred Skills Experience with commodities indices or structured products Knowledge of market data platforms (e.g., Bloomberg, Refinitiv) Exposure to Docker, AWS/GCP, and database systems (SQL/NoSQL) Please apply within for further details - Matt Holmes, Harvey Nash