Senior Software Engineer

Arc IT Recruitment Limited; Eastbourne; Hybrid; GBP 63,000 - 77,000; Full time

Benefits offered by this job

Bonus

Benefits

Job summary

Arc IT Recruitment Limited is seeking a Senior .NET Developer for Brighton with a hybrid work arrangement. The role focuses on building fast, reliable APIs at scale within an international e-commerce context.

You will own services end-to-end, from design to production, in a multi-disciplinary team that ships updates multiple times daily using CI/CD practices. The position offers a £70,000 base with bonus and benefits.

Qualifications

• Strong commercial C# .NET Back End experience.
• SQL Server/T-SQL, including query tuning, indexing and execution plans.
• High-traffic E-commerce or transactional systems.
• Cloud experience, ideally AWS.
• Strong RESTful API design: versioning, idempotency, caching, OpenAPI/Swagger.
• Production ownership: monitoring and profiling .NET apps (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.

Responsibilities

• 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, owning them from design through to production.
• You'll be part of a multi-disciplinary team releasing several times a day through CI/CD.

Skills

C# .NET Back End

SQL Server / T-SQL

Cloud AWS

RESTful API design

CI/CD

AI coding tools

Code reviews & automated testing

Monitoring & profiling

Education

CS degree

Tools

Datadog

New Relic

CloudWatch

Job description

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

I'm working with a well-established, international E-commerce 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 Back End experience
• SQL Server/T-SQL, including query tuning, indexing and execution plans
• High-traffic E-commerce or transactional systems
• Cloud experience, ideally AWS
• Strong RESTful API design: versioning, idempotency, caching, OpenAPI/Swagger
• Production ownership: monitoring and profiling .NET apps (eg 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