Senior Software Engineer

Senior .NET Software Engineer – eCommerce Scale-Up

Location: London (Hybrid – 1 day per week on-site)

Type: Permanent / Full-Time

Salary: £75,000 – £90,000 + equity + benefits

Tech: C#, .NET Core, Azure, Microservices, REST APIs

Industry: eCommerce

High-impact role in a scaling product-led environment

The Opportunity

Our client is a fast-growing, VC-backed eCommerce scale-up based in London, building a next-gen platform powering some of the UK’s most exciting digital-first brands. With strong revenue, a rapidly growing customer base, and ambitious plans, they’re looking to scale their core engineering team.

We’re hiring a Senior .NET Software Engineer to help evolve and scale the platform as it enters its next growth phase. This role offers a mix of hands-on engineering and technical leadership, and is perfect for someone who thrives in fast-paced, product-driven environments.

This is a full-time hybrid position, with just 1 day a week on-site in their central London office.

Tech Stack

• C# / .NET Core / ASP.NET
• RESTful APIs / Microservices
• SQL Server, Entity Framework
• Azure (App Services, Functions, DevOps)
• CI/CD: Azure DevOps or GitHub Actions
• Optional: React, Vue (frontend exposure)

What You'll Be Doing

• Leading the design and development of scalable backend services and APIs
• Collaborating with product, DevOps, and frontend teams on new features and improvements
• Shaping architectural decisions as the platform scales
• Championing code quality, performance, and reliability across the stack
• Mentoring junior engineers and contributing to engineering culture
• Owning delivery of high-impact features tied to real-world eCommerce outcomes

What We’re Looking For

• 5+ years’ experience with .NET (C#, .NET Core)
• Proven ability to design and scale backend systems in high-traffic environments
• Experience working in product-led or transactional platforms (eCommerce, SaaS, etc.)
• Strong knowledge of cloud platforms (Azure preferred)
• Familiarity with CI/CD, Agile, and DevOps practices
• A collaborative mindset and product-first thinking
• London-based or able to commute in once per week

Nice to Have

• Experience with payment, order, or inventory systems
• Exposure to containerisation (Docker, Kubernetes)
• Some frontend knowledge (React, Vue, or Blazor)
• Previous experience in a scale-up or rapid-growth tech environment

What’s on Offer

• Salary: £75,000 – £90,000
• Equity / stock options
• Flexible hybrid working (1 day/week in the office)
• 25 days holiday + bank holidays
• A flat, fast-moving culture where engineers have influence
• A chance to work on a platform with real customer and commercial impact

If this sounds like you, apply now!