Principal Software Engineer

Cboe Global Markets•Chicago, IL

7d•$182,325 - $235,950•Hybrid

About The Position

Building trusted markets — powered by our people At Cboe Global Markets, we inspire our people to solve complex challenges together because what we do matters. We provide the financial infrastructure that powers the global economy. As a leading provider of market infrastructure and tradable products, Cboe delivers cutting-edge trading, clearing and investment solutions to market participants around the world. We’re building meaningful ways to support professional and personal development while strengthening the trust we’ve earned as a global market leader. Our teams are empowered to share ideas, actively pursue them and bring on a challenge. As champions of internal mobility and access to opportunity, we encourage our people to “go for it” and equip our managers with the training to coach their teams to the next level. We strive to provide employees a safe space to network, share ideas and create opportunities. To support strong partnership and team connection, this role follows a four day in office work model. Location Overview Cboe HQ is located in the historic Old Post Office district, it’s a landmark that blends classic architecture with modern amenities. The building features expansive spaces with high ceilings and large windows, offering an abundance of natural light and panoramic views of the city skyline and the Chicago River. With its prime location in the heart of downtown, the OPO Building provides easy access to major transportation hubs, including Union Station and multiple CTA lines, making it convenient for commuters. The building is home to a variety of amenities, including restaurants, a fitness center, and collaborative workspaces, creating a vibrant and dynamic work environment in one of Chicago's most iconic areas. Role Overview Cboe’s Data Vantage division — the team behind Silexx, LiveVol, and DataShop — is looking for a Principal Software Engineer who builds across the entire stack and owns the integration and end-to-end testing that keeps our platforms working together. This is a hands-on principal role for a seasoned full-stack engineer who is an expert in modern ReactJS front-end development, fluent in C#/.NET back-end services, and comfortable navigating a WPF desktop client. You will design and implement real-time web and desktop applications and scalable back-end systems for financial analytics, execution, and risk-management platforms — and you will define how we validate them across products. We expect you to work fluently with AI coding assistants such as Claude throughout the software development lifecycle, using them to accelerate delivery, generate and maintain test suites, review code, and raise quality across the team. The ideal candidate has spent years engineering complex real-time UIs, has a deep understanding of web streaming technologies and RESTful/gRPC transport protocols, and is energized by breaking down product silos to deliver integrated, well-tested software across the platform.

Requirements

Bachelor’s degree in Computer Science, Software Engineering, or a related STEM field.
10+ years of hands-on experience in professional full-stack development, including modern web technologies and back-end services.
Demonstrated experience designing and leading integration and end-to-end test strategy for complex, multi-component systems.
Strong OOP skills, experience with design patterns, and a solid grounding in computer science fundamentals.
Experience mentoring engineers and providing technical leadership across teams.
Hands-on experience using AI coding assistants (e.g., Claude) in a professional development workflow.
Expertise in ReactJS, React Hooks, MobX or Redux, and component-based architecture.
Strong proficiency in HTML5, CSS3, JavaScript (ES6+), and TypeScript.
Advanced experience with C#/.NET and ASP.NET for building robust back-end services.
Experience with front-end build tools such as Webpack, Babel, and NPM.
Proficiency in building and consuming RESTful APIs, gRPC, WebSockets, and other real-time communication methods.
Expertise in throughput optimization techniques, serialization (MessagePack, Protobuf), and compression methods.
Experience with microservices architecture.
Working knowledge of WPF desktop clients sufficient to build against, integrate with, and test them (e.g., the Silexx OEMS).
Strong understanding of data structures and algorithms, profiling, and performance optimization.
Expertise designing and implementing integration, contract, and end-to-end test automation across web, API, and back-end layers.
Hands-on experience with test frameworks and tooling such as Playwright or Cypress, xUnit/NUnit, and API/contract testing tools.
Experience embedding automated tests into CI/CD pipelines as release gates.
Ability to define test strategy and quality standards that span multiple products and teams.
Proficiency using AI coding assistants such as Claude for code generation, test creation, code review, and refactoring.
Familiarity with integrating AI and agentic tooling into the SDLC and establishing responsible-use practices for a team.
Expertise in implementing authentication and authorization using OpenID Connect, OAuth 2.0, and related security standards.
Experience with security code scanning and remediating identified vulnerabilities.
Proficient in database technologies such as MySQL, Postgres, and SQL Server, and ORM frameworks like Entity Framework.
Familiarity with Agile/Scrum methodologies and DevOps practices (CI/CD pipelines, automated testing, etc.).
Comfortable with Windows and Linux operating systems.
Excellent communication, problem-solving, and leadership skills.

Nice To Haves

Experience with financial industry systems, real-time trading, order routing workflows, or market data distribution.
Hands-on experience with desktop frameworks like Electron, Tauri, or OpenFin, or with native desktop / OS-level APIs.
Familiarity with GraphQL.
Containerization (Docker/Kubernetes) and cloud platforms (Azure, AWS, or GCP).
Experience with tools such as PowerShell, Git, Jenkins, Jira, Confluence, and Wireshark.

Responsibilities

Serve as the subject-matter expert for integration and end-to-end testing, working across the Silexx, LiveVol, and DataShop teams to define and refine how we validate workflows that span the front-end, APIs, and back-end services.
Lead the design, architecture, and implementation of modern full-stack applications using ReactJS front-ends and C#/.NET back-end services.
Build and maintain automated integration, contract, and end-to-end test suites that exercise REST, gRPC, and real-time streaming interfaces across products, and wire them into CI/CD pipelines as release gates.
Leverage AI coding assistants such as Claude across the SDLC — for test generation, code review, refactoring, and agentic automation — and help establish team practices and guardrails for AI-augmented development.
Collaborate with product management and cross-functional teams across products to understand requirements and deliver integrated, high-quality solutions.
Implement secure server communications and authentication/authorization using RESTful and streaming protocols, OpenID Connect, and OAuth 2.0.
Drive technical decisions, provide architectural direction for growth into new asset classes and products, and mentor engineers across teams.
Diagnose and resolve complex, cross-product technical problems spanning the UI, API, and back-end layers.

Benefits

Fair and competitive salary and incentive compensation packages with an upside for overachievement
Generous paid time off, including vacation, personal days, sick days and annual community service days
Health, dental and vision benefits, including access to telemedicine and mental health services
2:1 401(k) match, up to 8% match immediately upon hire
Discounted Employee Stock Purchase Plan
Tax Savings Accounts for health, dependent and transportation
Employee referral bonus program
Volunteer opportunities to help you give back to your communities
Complimentary lunch, snacks and coffee in any Cboe office
Paid Tuition assistance and education opportunities
Generous charitable giving company match
Paid parental leave and fertility benefits
On-site gyms and discounts to other fitness centers