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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Backend Developer - **Company:** protein works. - **Location:** Liverpool, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Java (Programming Language), PHP (Programming Language), Microsoft Windows, Agile Methodology, Artificial Intelligence, Application Integration Architecture, Software System Penetration Testing, JIRA, User Authentication, C Sharp (Programming Language), Cloud Foundry, Profiling, Cyber Security, Continuous Integration, Relational Databases, Linux, DevOps, Github, PostgreSQL, Microsoft SQL Server, MySQL, Open Web Application Security, Message Oriented Middleware, Software Engineering, Warehouse Management Systems, Backend, Solid Principles, Restful APIs, Domain Driven Design, Docker, Golang, Microservices - **Published:** September 18, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=179e429b7e7a7a2c ## About the Role * Backend & Architecture: 5+ years of backend development (Go, Java, C#, or PHP with a focus/openness to Go) with strong CS/software engineering foundations, SOLID principles, and clean/event-driven patterns across microservices and monoliths. * Data & Async Systems: Solid background in relational databases (PostgreSQL, MySQL, SQL Server) and asynchronous messaging (queues, events, retries, idempotency). * DevOps & Observability: Practical experience with Docker, Linux/Windows, Git/GitHub, Jira/Agile, monitoring/alerting, and diagnostic/profiling tools in high-volume e-commerce environments. * Communication & AI Integration: Strong problem-solving and stakeholder communication skills, coupled with active practice using AI development/coding tools. ## Description 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. ## Related Videos - [GitOps for the people](https://www.wearedevelopers.com/videos/461-gitops-for-the-people) - [MySQL Protocol Features You Should Be Aware Of](https://www.wearedevelopers.com/videos/100267-mysql-protocol-features-you-should-be-aware-of) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Coffee with Developers](https://www.wearedevelopers.com/videos/341-coffee-with-developers) - [Improving quality with Agentic AI with Rovo Dev and Xray](https://www.wearedevelopers.com/videos/2005-improving-quality-with-agentic-ai-with-rovo-dev-and-xray) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) ## Related Articles - [The 7 Most Popular Backend Frameworks for Developers](https://www.wearedevelopers.com/magazine/403-the-7-most-popular-backend-frameworks-for-developers) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [20 Essential Tools For Backend Development](https://www.wearedevelopers.com/magazine/218-20-essential-tools-for-backend-development) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development)