Principal Software Engineer - Retail ERP

Principal Software Engineer - Retail ERP

The Principal Software Engineer will contribute to the design and build of a new ERP product - this will be a fresh platform, on a modern tech stack, giving the chance to shape something from the ground up. As part of this transformation, we're looking for an experienced Principal Software Engineer with extensive experience in developing in Type Script, React.js and Node.js

to join our growing team.

You’ll lead and contribute to the design and development of high‑quality, scalable features and services, working with product and engineering teams to deliver solutions that drive performance, flexibility, and customer value.

In addition to this, the Principal Software Engineer will be expected to lead the improvement and modernisation of existing systems and platforms. Experience of decomposing monoliths, implementing CI / CD development practices and scaling SaaS products would be highly desirable.

This is a hybrid position – working 3 days a week from our Winnersh office.

• Specifying, designing and improving an ERP product on a modern AWS hosted tech stack.
• Take ownership of high‑risk, high‑complexity projects; lead by example by shipping critical, quality code.
• Collaborating with cross‑functional teams to deliver consistent, high‑quality features, assuming the technical lead role, influencing cross-team technical strategy.
• Writing and maintaining automated, unit and integration tests.
• Ensuring software quality, using continuous delivery and deployment practices.
• Mentoring and coaching peers, supporting their growth and development.

• Node.js & Type Script
• GraphQL
• Git Hub for source control
• AI‑powered development tooling
• Agile methodologies and CI / CD pipelines
• Experience in PHP and Java would be of secondary benefit.

• Minimum 7 years’ coding experience with Type Script and React.jsNode.js.
• Experience of Graph
  
  QL schema lifecycle: design, deprecation, backwards compatibility, and documentation.
• Implement and enforce Graph
  
  QL performance practices (batching, persisted queries, depth limiting, data loader patterns).
• Experience operating as a Technical Lead.
• An advocate for continuous integration and deployment practices – shape CI / CD pipelines and release processes for safe, frequent deployments (feature flags, canary, rollbacks, etc.).
• Experience of embedding security best practices and ensuring data protection compliance.
• In‑depth understanding of source control using Git Hub.
• Confident in using AI‑assisted development tools, and helping others to adopt this way of working.
• Experience working in Agile environments.
• Ability to work collaboratively in a hybrid team structure.
• Experience of improving quality practices, writing, improving and maintaining tests at all levels of the test pyramid, including implementing test frameworks.

• Work with a modern tech stack and shape the future of retail ERP.
• Experience the full software development lifecycle, working on both mature products and as part of the team completing a new product build.
• Join a team that values innovation, autonomy, and impact.
• Collaborate with engineers who are passionate about doing things differently.

Working at Sage means you're supporting millions of small and medium‑sized businesses globally with technology to work faster and smarter. We leverage the future of AI, meaning business owners spend less time doing routine tasks, like entering invoices and generating reports, and more time pursuing their ambitions.

Our colleagues are the best of the best. It’s why we were awarded 2024 Best Places to Work by Glassdoor. Because to achieve extraordinary outcomes, we need extraordinary teams. This means infusing Sage with people who knock down barriers, continuously innovate, and want to experience their potential.

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