Senior SDET / Chicago / Python

Chicago, IllinoisOnsiteFull Time$130k - $160kA rapidly growing financial technology organization in downtown Chicago is seeking a full-time Software Development Engineer in Test to support next-generation trading, market data, analytics, and risk management platforms. This position offers the opportunity to work with modern technologies including Python, C#, Playwright, Selenium, SQL, AI/ML tooling, and highly scalable real-time systems operating within the capital markets industry. This opportunity is ideal for someone who enjoys solving complex technical challenges while working at the intersection of software engineering, quality assurance, trading technology, and machine learning. The organization operates with a highly collaborative culture where testers work closely with developers, quantitative teams, and business stakeholders. Candidates looking to expand their expertise in automated testing, derivatives markets, and AI-driven applications will find substantial growth potential. Required Skills & Experience 3+ years of QA Engineering, SDET, or Automation Engineering experience Python automation experience Experience with Playwright, Selenium, or comparable automation frameworks Strong SQL scripting and database validation skills Knowledge of FIX Protocol messaging Experience within trading, financial services, capital markets, exchanges, or fintech Understanding of options, derivatives, futures, or trading workflows Experience performing both manual and automated testing Desired Skills & Experience Machine Learning or AI testing exposure Experience with LLMs, Claude, Copilot, or agentic coding tools Knowledge of REST API testing and Rest Assured C# development experience Experience supporting OMS, EMS, market data, or execution platforms Prop trading or exchange technology background Performance and load testing experience CI/CD pipeline testing exposure What You Will Be Doing Design and maintain automated test frameworks Execute manual and exploratory testing activities Validate trading workflows, market data integrations, and platform functionality Test APIs, databases, and distributed applications Support AI/ML testing initiatives and model validation efforts Investigate production issues and create regression coverage Collaborate with software engineers, traders, and quantitative teams Tech Breakdown 40% Test Automation Development 25% Trading Platform Validation 20% API and Database Testing 15% AI/ML Testing Initiatives Daily Responsibilities 70% Hands On 30% Team Collaboration The Offer Bonus eligible You will receive the following benefits: Medical, Dental, and Vision Insurance 401(k) with company contribution Paid Time Off Employee wellness programs Flexible work environment Stock Options Professional development opportunities Applicants must be currently authorized to work in the US on a full-time basis now and in the future.