Senior Python Developer - Inside IR35 - Up to £700 per day

Job Description

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Senior Python Developer - Trading & Risk Platforms

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Hybrid in Central London

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Inside IR35 - Up to £700 per day

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We are seeking Senior Python Developers with proven experience building trading and risk systems within investment banking. You will develop Back End services, data processing solutions and risk-focused applications supporting trade life cycle, risk calculations and reporting.

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Key Responsibilities

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• Develop and enhance Python applications for trading and risk platforms

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• Build data pipelines and automation for trade, risk and reconciliation workflows

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• Process large financial datasets supporting PnL, risk and regulatory reporting

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• Contribute to architecture, scalability and system design decisions

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• Partner with quants, traders and risk teams to deliver technical solutions

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• Develop and integrate REST APIs and Back End services

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• Maintain high code quality through testing, reviews and best practices

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• Mentor junior developers where required

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Required Skills

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• Strong Core Python development experience

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• Experience with enterprise trading and risk platforms (eg Quartz, SecDB, Athena, Kanon, Beacon or similar)

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• Strong SQL and large-scale data handling expertise

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• Pandas and NumPy for data processing and analytics

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• REST API development using Flask, FastAPI or Django

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• Strong understanding of performance optimisation and scalable systems

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• Unix/Linux and Shell Scripting experience

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Domain Experience

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• Investment Banking or Capital Markets background

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• Experience across Market Risk, CCR, PnL, Trade Lifecycle and Reconciliations

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• Knowledge of derivatives, swaps, futures, options and fixed-income products

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Desirable

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• PySpark or distributed data processing

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• Exposure to quantitative models and pricing systems

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• Global banking environment experience

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• 9-15 years' relevant experience

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Please note: Candidates without trading, risk or capital markets experience will not be considered.