Senior .NET Developer (Trading/HFT/Low-Latency) - Full Remote Global

## ABOUT THE OPPORTUNITY A fintech specialised in **trading platform development** is looking for a Senior+ .NET Developer to join a team building professional-grade trading infrastructure. This is a high-performance engineering role for someone who lives and breathes low-latency .NET, has made real architecture decisions in production, and is comfortable operating in a fast-moving, distributed fintech environment. There is a potential path to direct employment following the consulting engagement. **Language:** English B2 minimum (fluent spoken and written required) | **Level:** Senior+ | **Location:** Fully remote, global | **Timezone:** Minimum 4h overlap with 9AM–5PM EST ## PROJECT & CONTEXT You'll be contributing to a professional-grade trading platform ecosystem — spanning desktop and web trader solutions and order management — where performance, reliability, and low latency are non-negotiable. Architecture decisions matter here, and you'll be expected to both make them and explain them clearly to a distributed international team. ## WHAT WE'RE LOOKING FOR - Strong grasp of **algorithms and data structures**, applied in performance-critical production contexts - Deep hands-on experience with **performance-critical .NET** — multithreading, memory management, allocation optimisation, GC tuning, and use of Span and structs - Proven experience in **trading, fintech, HFT, or low-latency/real-time systems** - Track record of making **real architecture decisions** in production environments, not just implementing requirements - Experience **mentoring other developers** and elevating team engineering standards - Degree in **Computer Science, Mathematics**, or a related technical field - **Fluent English** — spoken and written, with the ability to clearly articulate technical decisions on calls with a distributed team - Available for at least **4 hours of overlap with 9AM–5PM EST** ## NICE TO HAVE - Experience with **OMS (Order Management Systems)** or prop firm trading infrastructure - Familiarity with **desktop application development** in .NET (WPF or similar) - Background in **market data processing** or real-time data feeds - Interest in or openness to **subsequent direct employment** with the client company Compensation: €2,300 – €3,050/month net, depending on experience and seniority level. Why HumanIT people stay (4.4 Glassdoor, 89% recommend) - 15th month salary - Health insurance covering your family - Birthday off - Mobility program for digital nomads - Real work-life balance Full benefits https://www.humanit.pt/careers/#perks What it's really like https://www.humanit.pt/careers/#work-at