This online brokerage and trading-technology firm that offers a professional-grade trading platform for retail and institutional traders alike. Their platform provides a customizable dashboard environment that lets users build their own layout - with flexible blocks for charts, quotes, option chains, and orders - so traders can tailor the interface to their workflow and trading style.
For retail investors, they aim to bring "pro-level" trading tools - including options trading and access to advanced charting and order execution - while keeping pricing accessible. For more advanced or professional traders (or firms), they also offer portfolio-margining, customized execution, clearing and custody options, and back-office support - making it a viable solution for sophisticated trading strategies and institutional operations.
They are looking for a highly skilled
Senior .NET Engineer with strong experience in building high-performance, real-time applications within the fintech or trading domain. In this role, you will design, develop, and optimize mission-critical systems that support trading workflows, pricing engines, market data processing, and other financial operations. The ideal candidate brings a deep understanding of modern .NET development, strong C++ experience, and hands-on work with SQL databases in fast-paced, data-intensive environments.
Required Skills & Experience - 5-7+ years of professional software engineering experience
- Strong proficiency in C#, .NET Core, and API/service development
- Hands-on experience with C++ in performance-critical applications
- Strong SQL skills and experience working with relational databases (SQL Server, PostgreSQL, etc.)
- MUST HAVE experience in fintech, trading systems, market data, or financial services
- Solid understanding of multithreading, concurrency, and distributed system design
- Experience in real-time or low-latency application development is a strong plus
What You Will Be Doing Tech Breakdown:
- 30% maintenance
- 70% new development
Daily Responsibilities:
- Design, develop, and maintain backend services and trading-related applications using C# and .NET Core
- Build high-performance components and low-latency modules in C++ to support pricing, execution, and market data processing
- Develop and optimize SQL database structures, queries, and stored procedures for large-scale financial datasets
- Collaborate with product managers, quantitative teams, and DevOps to deliver reliable and scalable trading systems
- Integrate with market data providers, order-routing systems, or financial APIs as needed
- Implement best practices for secure, compliant, and fault-tolerant fintech applications
- Troubleshoot performance bottlenecks and production issues within distributed, real-time environments
- Contribute to architecture decisions, code reviews, and continuous improvement initiatives
Office Location - Chicago Loop, IL
- Hybrid
- 4 days onsite // 1 day WFH
The Offer You will receive the following benefits:
- Medical Coverage
- Dental Coverage
- 401K
- PTO
Applicants must be currently authorized to work in the US on a full-time basis now and in the future.
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