Tectona is seeking a Principal C# Software Engineer to lead the development of a high-performance cryptocurrency trading platform and advanced analytics systems.

You’ll be building high-uptime, low-latency, .NET Core–based message processing and data transformation services that operate in real-time trading environments.

A strong understanding of cryptocurrencies is essential. Knowledge of perpetual futures is required (commercial experience not mandatory). Experience in crypto-related sectors is highly preferred.

• Work on mission-critical, real-time trading systems.
• Tackle deep technical challenges: GC optimization, memory management, Span<T>, binary protocols, async/concurrency patterns.
• Influence architectural decisions and development standards.
• Lead and mentor engineers while remaining deeply hands-on.
• Fully remote with flexible working hours — ideal for senior engineers.

• Design, develop, and support distributed, high-performance C# applications.
• Build software with observability, testability, and security as core principles.
• Collaborate with the Technical Architect on planning and implementing system changes.
• Troubleshoot complex issues across distributed services, queues, and external APIs.
• Conduct code reviews focused on maintainability and scalability.
• Provide technical leadership to a small development team.
• Mentor senior and junior developers.
• Support the CTO in evolving engineering processes and team maturity.
• Propose improvements based on domain insights gained through the role.

• Deep expertise in C# .NET, including DI, Hosting, Span<T>, allocations, and GC behavior.
• Ability to analyze where and how memory is allocated (stack vs heap, stackalloc).
• Knowledge of binary serialization methods (Span-based).
• Hands-on experience with message queues (SQS, Kafka, Service Bus), including DLQ and poison message handling.
• Strong SQL capabilities (Postgres / MSSQL) with query tuning and execution plan analysis.
• Experience with containers (Docker), networking fundamentals, and protocol porting.
• Ability to build unified abstractions for APIs and WebSocket streams.
• Understanding of idempotency and its importance in trading/risk systems.
• Excellent attention to detail and strong testing practices (unit, property, integration).
• Strong documentation and reporting abilities.
• Experience leading development teams (4–8 engineers).
• Familiarity with CI/CD best practices.
• Excellent communication skills and experience working in global, remote teams.

• IaC experience (AWS CDK / Terraform).
• OpenTelemetry and monitoring best practices.
• Familiarity with cryptocurrency culture.
• Experience with container hosting and isolation models.
• AWS cloud experience.
• Knowledge of web-scraping, proxies, YARP.
• Ability to analyze proc/heap dumps.
• Experience with Actor/State Machine models (Orleans, Coyote).
• Knowledge of perpetual futures (TP/SL, TWAP, VWAP, isolated vs cross margin, hedge vs single modes).

• Fully remote, permanent role.
• Flexible working hours around core collaboration times.
• 25 vacation days.
• Opportunity to deliver real impact on a high-performance trading platform.