Sr. Python Engineer

A Senior Python Engineer who writes production code every day. You will build new components and refactor business-built tools into well-engineered applications. You will work directly with portfolio managers to understand how the tools are used and what must not break. This is a 100% hands-on role, not advisory or architectural., * Design, develop and maintain production-grade Python applications and APIs.

• Refactor and modernize Python/Excel tools built by business teams: add tests, structure, security and observability.
• Work directly with portfolio managers and front-office users to clarify requirements and validate results.
• Build data-intensive and analytics features on SQL and cloud data platforms.
• Contribute to CI/CD, automated testing and code reviews.
• Apply AI-assisted development practices where they improve speed and quality.

• 5+ years of hands-on, production Python development. Python is the main language in your current role.
• ETF or investment front-office experience (asset management, investment banking, capital markets). At minimum, you have worked directly with portfolio managers or traders.
• Experience modernizing legacy or business-built applications.
• Strong SQL and experience with cloud platforms (AWS preferred).
• API design and integration, automated testing, CI/CD, Git.
• You gather requirements directly from business users and communicate clearly with non-technical stakeholders.
• Willing to work on-site in Downers Grove 2-3 days/week.

Nice to have

• Fixed income ETFs, portfolio management or investment analytics.
• Aladdin, BNY or comparable investment platforms.
• Snowflake, Redshift, Databricks or BigQuery.
• AI-enabled development, agentic workflows, AI-assisted SDLC.