Senior Python Engineer

Role title: Senior Python Developer Location: London, UK and/or Krakow, Poland Contract: full time - Long term engagement Start date: January / February 2026 Overview: We are seeking a Senior Python Developer with extensive experience in investment banking to join our client’s technology and quantitative development team. The successful candidate will play a key role in designing, developing, and maintaining high-performance applications supporting trading, risk, and analytics functions. Key Responsibilities: • Design, develop, and optimise scalable Python-based applications for front-office and risk teams. • Collaborate with quantitative analysts, traders, and other developers to deliver business-critical solutions. • Enhance existing systems to improve performance, automation, and integration with trading platforms. • Contribute to system architecture, testing, and continuous deployment processes. Requirements: • Proven experience as a Python Developer within investment banking, hedge funds, or financial markets. • Strong knowledge of object-oriented programming, design patterns, and data structures. • Experience with SQL and familiarity with databases such as Oracle or PostgreSQL. • Exposure to C++ or Java is a plus. • Solid understanding of front-office trading environments, risk systems, or quantitative workflows. • Strong communication skills and ability to collaborate in fast-paced, client-facing environments. WHO WE ARE Quanteam Group is a Consulting firm specialized in the Capital Markets industry, in Paris, London, Krakow, Brussels, New York and North Africa. Since 2007, our 800 consultants provide major clients (Corporate & Investment Banks, Asset Managers, Hedge Funds, Brokers and Insurance Companies) with expertise in several projects such as Financial Engineering, Quantitative Research, Regulatory Implementation, IT Transformation & Innovation. The firm mainly takes part in: • Business consulting: Quantitative research, Risk management (e.g. Market risk, credit risk, counterparty risk), Banking regulations (e.g. Basel III, Solvency II, FATCA, EMIR, MiFID), Pricing & Valuation, Organizational Transformation & Process Improvement. • IT & Information systems consulting: Business Analysis, Project Management, Change management, Front Office Support (functional and technical), Development (e.g C++, Python, C#, Java, VBA), Financial Software (e.g. Sophis, Murex, Summit, Calypso), IT Transformation & Innovation. As part of Quanteam Group, Quanteam UK & PL has today more than 80 consultants, working for major Capital Markets institutions in London and Krakow.