Server-Side C# Engineer – Build at Scale, Influence Architecture, Work Flexibly

erg group — United Kingdom, GB
Published on

About the Role

My client is on a mission to simplify complex delivery infrastructure—and they’ve built a next-generation SaaS platform that’s now scaling internationally. With UK launch already complete and a US rollout underway, they’re tackling big engineering challenges and delivering powerful tech at serious scale.

They’re now looking for a highly skilled server-side C# engineer to join their lean, senior-led engineering team—working on a platform that’s pushing boundaries in event-driven architecture, distributed systems, and customer-first delivery.

What You’ll Work On

  • A greenfield microservices platform (24+ services) built around CQRS, Event Sourcing, and DDD.
  • High throughput transactional systems processing tens of thousands of requests per hour.
  • Real-time tracking and customer self-service layers designed to minimise support tickets.
  • A technically mature, agile team where every developer contributes to architectural direction.

Tech Snapshot (What You Must Know Cold)

In this position, proficiency in the following areas is required:

  • C#/.NET: ~8 years commercial server-side experience, ideally across multiple codebases and domains. You’ll also mentor and train other engineers—this is a hands-on leadership opportunity.
  • Event Sourcing & DDD: Not just academic—commercial experience implementing, supporting, and evolving these patterns in production is a must.
  • Messaging Tech: Proficiency in at least one asynchronous message-based system (e.g., RabbitMQ, Azure Service Bus, Kafka).
  • Infrastructure: Experience with Docker, Kubernetes, CI/CD pipelines, and cloud-native best practices.

What You'll Bring

  • Proven experience delivering high-performance distributed systems.
  • A test-first, craft-focused engineering mindset.
  • Strong architectural instincts and a collaborative, debate-positive attitude.
  • Comfort with modern engineering workflows and continuous delivery.

Why You’ll Love It

  • Interesting problems: This isn’t CRUD—think event sourcing at scale, complex routing logic, and fast data decisions.
  • Input into architecture: Every engineer is involved in shaping how the system evolves.
  • Relaxed, mature setup: No clock-watching—just flexible hours and a team of adults who love great code.
  • Modern stack: Real-world use of cutting-edge tools—not just theory.
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