Jobs, fresher vacancy - Senior .NET Engineer | Trading Platform Buildout • UK

Company: Selby Jennings London

UK

Our client is seeking a Senior .NET Engineer to join a technical environment focused on high-performance systems and low-latency data pipelines. They operate a lean, engineering-driven team responsible for building and maintaining the core backend services that power advanced trading infrastructures. This role contributes to a broader trading execution platform encompassing market data ingestion, order routing, and portfolio-level services. Their team works within a horizontal structure, where each engineer is fully accountable for their domain-from design through to production delivery. This position involves designing high-demand, low-latency systems that require meticulous, detail-oriented implementation. Key Responsibilities They expect the successful candidate to: Design and implement low-latency .NET microservices aligned with Clean Architecture principles Build background services (e.g., WebSocket consumers, FIX clients, Kafka or EventHub producers and consumers) Connect to financial market data sources and real-time streams Implement core components of an advanced trading system, including order management, portfolio logic, and market data pipelines Develop use case-driven business logic, fully decoupled from infrastructure Handle data persistence in high-throughput environments, with a focus on latency, consistency, and storage patterns Integrate observability features (structured logging, metrics, tracing) and implement fault-tolerant patterns Participate in cloud-native infrastructure decisions Lead the full development lifecycle from initial setup to production deployment Technical Environment Their platform includes: Language: C# (.NET 8) Architecture: Clean Architecture Infrastructure: Azure Container Apps, Azure Event Hub, Redis Cache, PostgreSQL (Timescale) CI/CD: Azure DevOps, Terraform (IaC) Messaging: Kafka or Redpanda Data Ingestion: WebSockets, REST, FIX Ideal Candidate Profile They are looking for someone who: Has 5+ years of experience in professional .NET and C# backend development Has experience with market data or trading systems Has worked with event-driven systems such as Kafka, RabbitMQ, or Event Hub Knows how to write, test, and scale background services in .NET Is comfortable with multithreading, async programming, and streaming logic Understands and respects system boundaries and responsibilities Can work close to infrastructure, including containers, CI, Terraform, and observability tooling Values clear, concise documentation Bonus Skills Experience with Node.js, TypeScript, NestJS, or Python Apply Now!