Principal Full-Stack Software Engineer C#/.NET (Flex Hybrid)

Job Description:

Position Title: Principal Full-Stack Software Engineer C#/.NET

Department: Systems Development

Division:  Cboe Data Vantage

Location: Flex/Hybrid near a Cboe office (Lenexa, Chicago or NYC)

Position Summary:

Cboe Data Vantage division is looking for a highly skilled and experienced Principal Software Engineer to join our team. This role is perfect for a seasoned engineer who is an expert in .NET/C# server-side development with some exposure to front-end technologies like ReactJS. You will be responsible for designing and implementing scalable back-end systems that power high-performance React-based front-end applications, particularly in financial analytics, execution, and risk management platforms. The ideal candidate has extensive experience in developing and engineering complex and performant server-side applications with expertise in real-time data processing, web streaming technologies, RESTful APIs, and securing applications and communications to deliver enterprise grade software solutions.

Key Responsibilities:

• Lead the design, architecture, and implementation of scalable server-side applications using C#/.NET.
• Collaborate with front-end teams (using ReactJS) to ensure smooth and performant integration between the back-end and UI.
• Work closely with cross-functional teams, including product management, to understand requirements and deliver high-quality, well-architected solutions.
• Implement server communications leveraging secure APIs using streaming and RESTful transport protocols.
• Implement secure authentication and authorization mechanisms using OpenID Connect and OAuth.
• Ensure code quality through best practices, including unit testing, integration testing, and code reviews.
• Drive technical decisions and provide mentorship to other developers on the team.
• Independently research and resolve complex technical problems.
• Optimize application performance through analysis and tuning.
• Implement security code scanning and update software code to resolve security issues.
• Manage technical debt and help evolve the architecture to support future business needs.
• Self-manage assigned projects to ensure successful completion in designated time frames.
• Stay up to date with emerging technologies and frameworks, continuously improving and innovating our stack.

Qualifications:

• Bachelor’s degree in Computer Science, Software Engineering, or a related field.
• 8+ years of hands-on experience in professional full-stack development with a focus on C#/.NET.
• Strong OOP skills and experience with design patterns.

Skills & Requirements

• Development:
  • Advanced expertise in C#/.NET and ASP.NET for building scalable, high-performance back-end services.
  • Proficiency in developing and consuming RESTful APIs and real-time communication protocols like WebSockets.
  • Expertise in data serialization (MessagePack, Protobuf) and throughput optimization techniques, including compression.
  • Experience with database technologies such as SQL Server, PostgreSQL, MySQL, and ORMs like Entity Framework.
  • Strong understanding of data structures and algorithms, profiling and performance optimization.
  • Prior experience with operating system APIs.
  • Experience with microservices architecture.
• Security:
  • Expertise in implementing authentication and authorization using OpenID Connect, OAuth 2.0, and related security standards.
  • Proficiency in data protection mechanisms including encryption.
  • Experience working with application security and vulnerability scanning and remediation techniques.
• Other Skills:
  • 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 Have:
  • Experience with financial industry systems.
  • Proficiency in front-end technologies such as Javascript, TypeScript, ReactJS.
  • Familiarity with gRPC or GraphQL.
  • Understanding of microservices architecture, containerization (Docker/Kubernetes), and cloud platforms (Azure, AWS, or GCP).

Benefits and Perks 

We value the total wellbeing of our people – including health, financial, personal and social wellness. We believe standard benefits like health insurance and fair pay are given at