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

Hunter Bond; Greater London; Hybrid; GBP 77,000 - 129,000; Full time

Job summary

Hunter Bond in London seeks Senior Python Developers to build backend services for trading and risk platforms. You will process large financial datasets, implement data pipelines, and support PnL, risk calculations and reporting. The role requires collaboration with quants, traders and risk teams and mentoring junior developers. Hybrid in Central London, up to £700/day, Inside IR35.

Qualifications

• Senior Python developer with experience building trading and risk systems in investment banking.
• Strong SQL and large-scale data handling expertise.
• Pandas and NumPy for data processing and analytics.
• REST API development using Flask, FastAPI or Django.
• Understanding of performance optimization and scalable systems.
• Unix/Linux and shell scripting experience.

Responsibilities

• Develop and enhance Python applications for trading and risk platforms.
• Build data pipelines and automation for trade, risk and reconciliation workflows.
• Process large financial datasets supporting PnL, risk and regulatory reporting.
• Contribute to architecture, scalability and system design decisions.
• Partner with quants, traders and risk teams to deliver technical solutions.
• Develop and integrate REST APIs and backend services.
• Maintain high code quality through testing, reviews and best practices.
• Mentor junior developers where required.

Skills

Python

SQL

Pandas

NumPy

REST APIs

Flask

FastAPI

Django

Unix/Linux

Tools

Flask

FastAPI

Django

Job description

Hybrid in Central London

Inside IR35 - Up to £700 per day

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

Key Responsibilities

• Develop and enhance Python applications for trading and risk platforms
• Build data pipelines and automation for trade, risk and reconciliation workflows
• Process large financial datasets supporting PnL, risk and regulatory reporting
• Contribute to architecture, scalability and system design decisions
• Partner with quants, traders and risk teams to deliver technical solutions
• Develop and integrate REST APIs and backend services
• Maintain high code quality through testing, reviews and best practices
• Mentor junior developers where required

Required Skills

• Experience with enterprise trading and risk platforms (e.g. Quartz, SecDB, Athena, Kanon, Beacon or similar)
• Strong SQL and large-scale data handling expertise
• Pandas and NumPy for data processing and analytics
• REST API development using Flask, FastAPI or Django
• Strong understanding of performance optimisation and scalable systems
• Unix/Linux and shell scripting experience

Domain Experience

• Investment Banking or Capital Markets background
• Experience across Market Risk, CCR, PnL, Trade Lifecycle and Reconciliations
• Knowledge of derivatives, swaps, futures, options and fixed-income products
• PySpark or distributed data processing
• Exposure to quantitative models and pricing systems
• Global banking environment experience
• 9–15 years' relevant experience

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