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# Contract Role: Senior ETF Platform Developer_ Downers Grove, IL (Hybrid)

- **Company:** TECHNOSPHERE
- **Location:** Downers Grove, IL, United States (Remote available)
- **Experience:** Expert
- **Contract:** Contract
- **Skills:** Application Programming Interfaces (APIs), Amazon Web Services, Amazon S3, Business Logic, Automation of Tests, Profiling, Continuous Integration, Identity and Access Management, Python (Programming Language), PostgreSQL, NumPy, Software Engineering, Data Processing, Snowflake, Technical Debt, Pandas, Amazon Relational Database Service, Cloudwatch
- **Published:** November 11, 2026
- **Apply:** https://www.thejobnetwork.com/job/88fe5947-73c8-4d3a-9a7b-8d3995de94cb/contract-role-senior-etf-platform-developer-downers-grove-il-hybrid

## About the Role

* At least 7 years of software engineering experience, including recent ownership of production applications in asset management, capital markets or another data-intensive financial environment.

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 * Strong hands-on Python engineering, beyond notebooks, including production services, testing, packaging, profiling and data processing with pandas, Polars or NumPy.

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 * Production experience with PostgreSQL and Snowflake, including data modelling, query and workload performance, access controls and operational support.

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 * Hands-on AWS experience using relevant services and patterns for secure, resilient and observable applications, for example ECS or EKS, Lambda, S3, RDS, CloudWatch, IAM, Secrets Manager and infrastructure as code.

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 * Experience modernizing live business-critical applications incrementally while maintaining continuity and preserving specialist business logic.

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 * Solid API, integration, CI/CD, automated testing, security, observability and support practices.

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 * Ability to work closely and credibly with portfolio managers, quantitative analysts and investment-data specialists in an onsite, iterative delivery environment.

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 * Clear written and verbal communication, with a practical approach to documentation and knowledge transfer.

## Description

We are looking for a hands-on senior engineer to help institutionalize and extend a portfolio of business-critical ETF investment tools used by portfolio managers and quantitative investment teams. The applications are already operational and predominantly cloud-based. The priority is not a wholesale lift-and-shift, but safe, incremental improvement: reduce key-person dependency, address technical debt and scalability issues, strengthen production support, and deliver high-value capabilities from the business backlog. You will work directly with ETF portfolio managers, quants, technology and data teams in a fast-moving co-development model, preserving critical investment logic while improving engineering quality and operational resilience.