Principal Software Engineer – Data and Billing QA

The Opportunity

We're looking for an engineer who thinks in systems, leads with vision, and sees AI as a force multiplier for everything we do. As a Principal Software Engineer for Data and Billing, you will help lead QA activities for our billing platform, where we shadow and validate over $1B in annual revenue. You'll work on streaming data testing, agentic coding workflows, and AI-driven tools that turn our billing data into revenue forecasting and strategy insights for the business.

• Build agents and MCPs into our test harnesses to automate bug triage and generate agentic tests, so our coverage scales without scaling headcount
• Take on customer billing program testing, validating C++ logic against massive files output from the trading system
• Close the gap on our remaining untested revenue (ports, access fees, liquidity provider programs)
• Stand up testing for our next-gen streaming stack (Java, Avro)
• Support our existing data streaming test suites, which have saved millions of dollars in losses and reputational damage
• Use our billing platform for forward-looking revenue forecasting and strategy modeling
• Automate real-time data testing via CI/CD (Jenkins)
• Eventually expand into billing/invoice testing for other Cboe products and services

What You Bring

• Vision and Leadership: A strategic, forward-thinking mindset — you don't just solve today's problems, you design systems that scale
• Strong analytical skills and an exacting attention to detail: The ability to build consensus, communicate clearly, and lead change across cross-functional teams
• Practical experience with tools such as Claude Code, OpenAI Codex, or similar: Familiarity with agentic AI frameworks — LangChain, AutoGen, or equivalents
• A builder's instinct: you see where AI can remove friction and you act on it: Core Engineering Skills: Strong Python, Java, and C++ programming chops Solid Linux skills (you'll help deploy our AI infrastructure)
• Hands-on experience with Kafka, Avro, Kudu, Snowflake: Data analytics, systems design Supporting Technical Skills: Databases: PostgreSQL (preferred), MySQL or Oracle; working SQL proficiency required Atlassian toolset (Jira, Confluence): Experience with Git-based version control CI/CD tooling experience, including Jenkins
• Bachelor's degree in computer science, engineering, or a related field — or equivalent experience: You'll really stand out with Experience in financial markets with working knowledge of order entry or market data protocols A track record of taking a build practice from reactive to proactive and making it stick

What We Offer

• Fair and competitive salary and incentive compensation with upside for overachievement
• Generous paid time off — vacation, personal days, sick days and annual community service days
• Health, dental and vision coverage, including telemedicine and mental health services
• 2:1 401(k) match up to 8%, effective immediately upon hire
• Discounted Employee Stock Purchase Plan Tax savings accounts for health, dependent care and transportation
• Employee referral bonus program
• Complimentary lunch, snacks and coffee in every Cboe office
• Paid tuition assistance and education opportunities
• Generous charitable giving company match
• Paid parental leave and fertility benefits
• On-site gyms and fitness center discounts

About Cboe

We value the total wellbeing of our people. Our benefits include:

• Fair and competitive salary and incentive compensation with upside for overachievement
• Generous paid time off — vacation, personal days, sick days and annual community service days
• Health, dental and vision coverage, including telemedicine and mental health services
• 2:1 401(k) match up to 8%, effective immediately upon hire
• Discounted Employee Stock Purchase Plan Tax savings accounts for health, dependent care and transportation
• Employee referral bonus program
• Complimentary lunch, snacks and coffee in every Cboe office
• Paid tuition assistance and education opportunities
• Generous charitable giving company match
• Paid parental leave and fertility benefits
• On-site gyms and fitness center discounts

Equal Employment Opportunity

We're proud to be an equal opportunity employer — and celebrate our employees' differences, including race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability and Veteran status. This position is not eligible for visa sponsorship. Candidates must be legally authorized to work in the United States without the need for employer sponsorship, now or in the future.