Join Protein Works as our Senior Backend Developer, and build a greenfield, cloud-native platform from the ground up using Go and modern microservices architecture.

About The Role

The Protein Works is a UK direct-to-consumer sports nutrition brand. We develop and manufacture our own products, sell them through our own e-commerce platform and ship them from our own warehouse. Behind the website sits a set of internal applications connecting orders, stock, finance, fulfilment and manufacturing, alongside a growing number of marketplaces and third-party services.

We are replacing those legacy internal applications with a new cloud-native platform: independently deployable services that will become the single integration layer between the website, finance, warehouse and manufacturing, and a foundation for AI-assisted automation across the business. This role is a core builder of that platform.

You will join a small, polyglot engineering team working DevOps, Information Security, Data and IT. Go is our preferred language for services because of its performance and operational simplicity, but we hire for engineering depth first: if your background is C#, Java or PHP and you are willing to work in Go, we want to hear from you.

What you will do

• Platform Development & Architecture: Design, build, and maintain microservices and domain models (orders, stock, fulfilment, finance) using Go, Domain-Driven Design, enterprise integration patterns, and clean architecture to incrementally replace legacy applications.
• Integration & Asynchronous Workflows: Build event-driven and queue-based workflows with REST APIs, authentication, idempotency, and contract testing to connect e-commerce, ERP, WMS, finance, and manufacturing systems.
• Operations, Security & AI: Own end-to-end delivery including containers, CI/CD, IaC, full observability (metrics, traces, logs), security/privacy compliance (OWASP, GDPR, pen testing), and day-to-day use of AI-assisted/agentic tools.
• Cross-Functional Leadership: Collaborate across tech and business teams, write ADRs, contribute to golden-path templates/standards, and translate business needs into technical execution.