Title: Senior Software DeveloperLocation: Caerphilly (1 day a fortnight in office)Salary: £65,000 - £70,000Overview:Yolk Recruitment are partnered with global B2B SaaS business using technology to drive real-world impact. Their platform helps organisations operate more safely, responsibly, and efficiently, supporting better standards across industries that genuinely matter.They''re well-established, scaling internationally, and investing heavily in their technology, with a clear focus on building modern, high-quality software in a forward-thinking environment.We''re looking for a Senior Software Developer to join a high-performing engineering squad delivering modern, scalable software solutions. This is a hands-on role with real ownership, working across the full development lifecycle using the latest tools, including AI-assisted development.What you''ll be doing:Building high-quality front-end and server-side applications using ReactOwning features end-to-end, from design through to deploymentWorking in an Agile squad delivering regular releasesLeveraging tools like GitHub Copilot to improve speed and qualityDriving best practice across testing, code quality and engineering standardsWhat we''re looking for:Strong experience with React and modern JavaScript/TypeScriptSolid testing experience (unit, integration, functional)Experience with containerised environments (Docker/Kubernetes)Comfortable owning features and influencing technical directionExposure to AI-assisted develop