Sr. Platform Engineer, Tech Lead (C#, Go)

Position Summary

We are looking for a seasoned, hands-on engineer to lead platform and backend engineering on our trading infrastructure. You will serve as the technical authority for a high-performance, low-latency trading platform - owning architecture decisions, setting engineering standards, and driving the work that keeps critical systems reliable and fast.You thrive in environments where microseconds matter, correctness is non-negotiable, and the team looks to you not just for technical direction but for the clarity and confidence to execute against it. You are pragmatic, opinionated, and comfortable operating at the intersection of systems engineering, financial technology, and cross-functional product delivery.

Key Responsibilities

• Serve as the technical lead for platform and backend engineering - owning architecture decisions, setting development standards, and coordinating across engineering, product, and business stakeholders.
• Design, build, and maintain high-performance, low-latency backend systems and trading infrastructure in C# and Go, with a relentless focus on throughput, reliability, and correctness.
• Define and enforce engineering best practices across the team, including code quality standards, testing strategies, and deployment processes.
• Proactively identify and address technical debt, performance bottlenecks, and reliability risks before they become production incidents.
• Mentor and develop engineers - providing constructive technical guidance, supporting career growth, and helping others expand their scope of ownership.
• Collaborate with frontend engineers to deliver cohesive platform features, and contribute directly to React-based tooling and interfaces when needed.
• Be a dependable presence on-call and in production - owning issues through to resolution and documenting learnings as repeatable processes.
• Drive cross-team alignment on platform capabilities, dependencies, and roadmap priorities.

Qualifications

Required

• Expert-level C# development skills - deep understanding of the .NET ecosystem, async/await patterns, performance optimization, and modern C# idioms (.NET 6+).
• Demonstrated experience leading technical architecture for backend or platform systems - producing clear, defensible design decisions with trade-off analysis.
• Hands-on experience with low-latency or high-throughput systems, particularly in financial, trading, or data-intensive environments.
• Strong proficiency with systems-level debugging, profiling, and performance tuning.
• Experience with RESTful API design, WebSockets, and asynchronous/event-driven architectures.
• Strong understanding of databases including schema design, query optimization, and transactional integrity (PostgreSQL, MySQL, or similar).
• Proficiency with CI/CD pipelines, automated testing strategies, and modern DevOps tooling.
• Frontend fluency - comfortable reviewing, contributing to, or coordinating with React-based frontend work.
• Reliable and dependable - you follow through, communicate proactively, and treat your commitments seriously.
• Strong written and verbal communication skills; comfortable driving alignment across engineering, product, and business stakeholders.

Preferred

• Familiarity with functional programming paradigms - comfortable applying immutability, pure functions, and composition patterns to write more predictable, testable code.
• Proficiency in Go - comfortable writing production-grade services, APIs, and platform tooling.
• Experience with React or modern frontend frameworks - able to contribute to or own frontend platform tooling when needed.
• Familiarity with Python for scripting, tooling, or data processing.
• Experience with Kubernetes and container orchestration in production environments.
• Background in trading, futures, prop trading, or fintech - you understand the domain, the stakes, and the performance expectations.
• Familiarity with distributed systems patterns: message queues (Kafka, RabbitMQ), caching strategies (Redis), and service-to-service communication.
• Exposure to observability tooling: Prometheus, Grafana, structured logging, and distributed tracing.
• Experience operating in multi-team engineering organizations with shared codebases or platform dependencies.