Fintech Developer - Trading Fees & Tax Systems (C#/.NET, Kafka)

Our client, a leading proprietary trading firm, needs a C# engineer to own the systems that price every fee tied to a trade, in near real time. You’ll sit directly with Operations, Accounting and Tax, and the work shows up on the P&L every day.

What you’ll do

• Build near-real-time P&L estimates for brokerage, exchange and market-data fees

• Develop reconciliation and bill-payment processing workflows

• Maintain and extend the tax-lot tracking and reporting system

• Stream and process trade events using Kafka

• Partner daily with Operations, Accounting and Tax users

5-12+ years of professional software development in C#/.NET (strong Java engineers considered)

• Hands-on Kafka or similar event-streaming experience

• Strong SQL / relational database skills

• Strong plus: fee, billing, reconciliation or tax-lot experience

• Bachelor’s in CS/Engineering/Math or equivalent

Work model: On-site 5 days/week (Philadelphia Main Line suburb), with an annual WFH day bank.

Type: Full-time, direct hire. Salary: open, plus bonus.