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

JR United Kingdom; Hounslow; On-site; GBP 60,000 - 90,000; Full time

Job summary

A leading tech company in South West London seeks a Server-Side C# Engineer to enhance their next-generation SaaS platform. Engage in solving complex engineering challenges around event-driven architecture and contribute to a collaborative, agile team. Join a relaxed environment that values craftsmanship in coding and offers flexible working hours.

Benefits

Flexible working hours

Collaboration in architectural decisions

Relaxed work environment

Cutting-edge technology exposure

Qualifications

• 8+ years of server-side experience in C#/.NET.
• Commercial experience with Event Sourcing and DDD.
• Proficiency in messaging systems like RabbitMQ or Kafka.

Responsibilities

• Work on a greenfield microservices platform with 24+ services.
• Contribute to architectural direction and mentor junior engineers.
• Address complex engineering challenges in high throughput systems.

Skills

C#/.NET

Event Sourcing

DDD

Asynchronous Messaging

Job description

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

Client:

Location: South West London, United Kingdom

Job Category: Other

EU work permit required: Yes

Job Views: 4

Posted: 31.05.2025

Expiry Date: 15.07.2025

Job Description:

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 (and What You Must Know Cold):

• 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—you must have commercial experience implementing, supporting, and evolving these patterns in production
• Messaging Tech: Proficiency in at least one asynchronous message-based system (e.g., RabbitMQ, Azure Service Bus, Kafka, etc.)

What You'll Bring:

• A test-first, craft-focused engineering mindset
• Strong architectural instincts with 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