We are looking for a Senior .NET Developer for our client — a global product company developing cutting-edge trading technology solutions for regulated brokers and trading firms. Their SaaS products power electronic trading, brokerage operations, risk management, and financial data analysis worldwide.
The ideal candidate is not just a coder but an engineer with a product mindset — someone who understands the project end-to-end, proactively asks questions, and strives to make a real impact. This role requires taking ownership of solutions, collaborating closely with cross-functional teams, suggesting improvements, and contributing to the growth of high-performance trading platforms. Responsibilities * Analysis and Design: Studying requirements, designing architecture, and decomposing tasks. * Development and Coding: Writing clean, structured, and optimized C# code following SOLID, DRY, and YAGNI principles, working with APIs, databases, logging, and monitoring. * Testing and Debugging: Creating unit/integration tests, fixing bugs, and optimizing performance. * Database Management: Designing, optimizing queries, and managing migrations. * CI/CD: Automating builds and deployments, working with Git and release processes. * Refactoring and Optimization: Improving code readability, performance, and architecture. * Team Collaboration: Participating in meetings, code reviews, and working with designers, testers, and Product Owners. * Support and Bug Fixing: Monitoring production, handling incidents. * Mentoring: Training colleagues, assisting with complex technical challenges, and introducing new approaches and tools.
Requirements * 5+ years of working experience with C#; * Strong knowledge of the .NET stack (we are using .net core); * Proven experience designing and implementing complex system architectures patterns; * Deep practical knowledge of software development lifecycle; * Experience in building resilient, high-load microservices with asynchronous communication and distributed data storage; * Git, GitLab, understanding of CI\CD processes; * Hands-on experience with Docker; * Expertise in TCP/IP stack, gRPC, WebSockets, and low-latency network optimizations; * Knowledge of Relational DBs and NoSQL DBs — we are using Redis, MongoDB, PostgreSQL, and MariaDB; * Experience integrating observability stacks (e.g. OpenTelemetry, Prometheus, Grafana) for real-time diagnostics and distributed tracing; * Mentoring: Training colleagues, assisting with complex technical challenges, and introducing new approaches and tools; * Deep knowledge of RabbitMQ, Apache Kafka or other message brokers; * Deep knowledge of .NET Core ecosystem; * Advanced Performance Optimization — tuning .NET applications for high concurrency, low latency, and efficient resource utilization.
Would be a plus * General knowledge and understanding of financial, stock, and options markets; * Experience with Actor Model frameworks — hands-on experience with Akka.NET, Orleans, or similar distributed computing frameworks for building scalable and resilient applications; * Cloud-Native Development — experience with Kubernetes and cloud providers (AWS, Azure, GCP).
What in it for you * Care from Day One: Medical insurance starting immediately (including dental care, massages, and professional psychological support) — because your well-being matters. * Work-Life Balance: 25 days of paid vacation + 30 days of sick leave, so you can truly rest and recover without stress. * Energy Investment: Partial reimbursement for sports activities to help you stay active and energized. * Continuous Growth: Partial coverage for English or Ukrainian language courses plus a fixed budget for professional development — choose the learning path that fits you best. * Knowledge Library: Access to a well-stocked office library and Kuka online library to learn, grow, and get inspired. * Island Retreat: 14 days per year at the company’s corporate villa in Cyprus — perfect for recharging. * Modern Offices: Unit City (Kyiv): Future-ready workspace designed for productivity, resilient to power outages. Larnaca (Cyprus): Stylish, comfortable office with open areas, cozy lounges, and fully equipped meeting rooms.
