Contract Senior Software Engineer (Java or Python) | Inside IR35
Contract length: 6 months (with potential to extend)
Location: London
Working Environment: On-site
You will be joining a private equity firm as a senior software engineer, to work across the following responsibilities:
Develop and support P&L, accounting, and returns-calculation applications across trading books
Build and extend our Client Reporting Framework
Add instrument and asset class coverage in our Trade Repository system
Manage data exchange with third-party vendors via SFTP and AWS S3
Use AI coding assistants (Claude, Cursor, GitHub Copilot) to compress delivery timelines while maintaining full code ownership and quality accountability
Collaborate with quant researchers and traders to translate complex financial requirements into auditable, production-grade code
Provide production support, working with Platform and SRE teams as needed Key Requirements:
Technical:
8+ years commercial experience in Python or Java across the full development lifecycle
5+ years in financial services (buy-side strongly preferred)
Solid relational database skills; MS SQL Server a strong plus
Snowflake experience required
Familiarity with AWS (S3, Lambda, EC2, Glue or similar)
Proficiency with Git, CI/CD pipelines, and observability tooling (e.g. Datadog)AI & Tooling:
Proven, hands-on experience shipping production code using AI coding assistants such as Claude, Cursor, or GitHub Copilot
Demonstrable examples where AI tooling reduced delivery time by 2x or more on a meaningful task
Strong prompt engineering skills and the ability to critically evaluate AI-generated code for correctness, security, and financial accuracyDesirable, but no essential:
Experience with Apache Airflow or similar workflow schedulers
REST or GraphQL API design experience
Knowledge of fixed income, FX, or derivatives products and associated P&L/risk methodologies