Senior Software Engineer (.NET )
Hybrid,
Remote
Ukraine
We are looking for a highly skilled Senior .NET Engineer to integrate into our client's core engineering team—a leading proprietary trading firm. You will collaborate on building and optimizing a high-performance, low-latency trading infrastructure that serves thousands of active traders.
Details about the customer.
Domain: FinTech / Proprietary Trading (US market).
Product: A cutting-edge platform connecting traders with funding opportunities.
Tech Vibe: High-load, low-latency, and data-intensive environment processing millions of events in real time.
- 5+ years of robust backend development using C# and the modern .NET ecosystem.
- Deep understanding of high-performance computing: multithreading, asynchronous programming, and concurrency in .NET.
- Strong hands-on experience with real-time data streams (WebSockets, gRPC) and messaging brokers (Kafka or NATS).
- Solid experience with relational databases (PostgreSQL) and in-memory caches (Redis).
- Familiarity with financial markets and basic trading concepts (e.g., order types, market depth, futures).
- Excellent English (Upper-Intermediate/B2) and strong autonomous communication skills.
- Contribute to the development of real-time order routing, execution services, and high-frequency market data processing using C# and .NET.
- Collaborate with the core team to optimize backend systems for low latency, focusing on memory allocation, garbage collection, and high-throughput workloads.
- Build and maintain WebSocket and gRPC APIs for real-time client communication and assist in integrating with liquidity providers (e.g., CQG, Tradovate).
- Promote engineering best practices, conduct code reviews, and provide architectural suggestions within a distributed Agile team.
What we offer:
- Annual paid vacation of 18 working days.
- Extra vacation days for long-lasting cooperation.
- Annual paid sick leave of 10 days.
- Maternity/Paternity leave.
- The opportunity for sabbatical leave.
- Marriage and Parenthood Package.
- Compensation for sports activities or health insurance covering (up to 250$ per year) — after the trial period.
- Career development plan.
- English and Spanish classes.
- Paying taxes and managing PE (Private Entrepreneur).
- Technical equipment.
- Internal Referral program.
- Opportunity to take part in company volunteering activities.
- Sombra is a “Friendly to Veterans” award-holder.
