Senior Software Engineer

Arc IT Recruitment Limited; Brighton; Hybrid; GBP 60,000 - 81,000; Full time

Benefits offered by this job

Bonus

Job summary

Arc IT Recruitment Limited is seeking a Senior .NET Developer for a hybrid role in Brighton, delivering fast, reliable APIs at scale for a multinational ecommerce platform. You will own services from design to production and collaborate with a cross-functional team including SDETs, DevOps and UX.

The role emphasizes cloud-based development, CI/CD releases, and daily delivery using modern observability tools.

Qualifications

• Strong commercial C# .NET backend experience.
• SQL Server / T-SQL experience including query tuning.
• Experience with high-traffic ecommerce or transactional systems.
• Cloud experience, ideally AWS.
• RESTful API design including versioning, idempotency, caching, OpenAPI/Swagger.
• Production ownership: monitoring and profiling .NET apps.
• Daily use of AI coding tools with judgement to own output.
• Good engineering habits: code review, automated testing, small & frequent releases.

Responsibilities

• Build, measure and tune services running in the cloud and at the edge from design through to production.
• Own and release software several times a day through CI/CD with a multi-disciplinary team.
• Play a key role in architecture decisions and production ownership.

Skills

C# .NET backend

SQL Server

API design

Cloud AWS

Monitoring & profiling

AI coding tools

Code review & testing

Education

CS degree (nice to have)

Tools

Datadog

New Relic

CloudWatch

Claude Code

Copilot

Cursor

Job description

Senior .NET Developer Brighton (Hybrid) £70,000 + bonus + benefits

I'm working with a well-established, international ecommerce business in Brighton. Its booking platform processes thousands of transactions every day across more than 20 markets. The business is looking for a Senior .NET Developer who cares about building fast, reliable APIs at scale.

The role

You'll work on a business-critical part of the platform. You'll build, measure and tune services running in the cloud and at the edge, and you'll own them from design through to production. You'll be part of a multi-disciplinary team of engineers, SDETs, DevOps, product and UX, releasing several times a day through CI/CD. You'll also have a real say in how things are built.

What you'll bring

• Strong commercial C# .NET backend experience
• SQL Server / T-SQL, including query tuning, indexing and execution plans
• High-traffic ecommerce or transactional systems
• Cloud experience, ideally AWS
• Strong RESTful API design: versioning, idempotency, caching, OpenAPI/Swagger
• Production ownership: monitoring and profiling .NET apps (e.g. Datadog, New Relic, CloudWatch)
• Daily use of AI coding tools (Claude Code, Copilot, Cursor), with the judgement to own what they produce
• Good engineering habits: code review, automated testing, small and frequent releases

Nice to have: a CS degree, and exposure to DDD, event-driven architecture, TDD/BDD, microservices or CQRS.

Why join? It's a pragmatic, evidence-led engineering culture. Your work will directly affect customers and revenue, and it's a stable, growing international business.

Brighton, Hybrid (2 to 3 days a week in office)

to 70k plus bonus plus benefits