Full Stack Mid-Level Software Engineer

We're looking for a UK-based developer to join our growing digital team, developing and maintaining bespoke, business-critical products for our customers and colleagues. You'll maintain and improve existing applications, build new features and integrations, and contribute to our new native mobile app alongside specialist developers, taking on greater ownership following launch. Working closely with our Product Owner, you'll also support a junior developer and collaborate with external specialists to deliver reliable, high-quality solutions. About Animal Trust Animal Trust is a veterinary Community Interest Company providing affordable care to sick pets. Our free consultations and transparent pricing help remove barriers to care, with profits reinvested in our people and patients. Responsibilities Maintain, monitor and troubleshoot live products, integrations and services. Develop features, APIs, integrations and data flows across front and back-end systems. Contribute to development and ongoing ownership of our iOS and Android app. Write maintainable, documented code and participate in reviews, testing and deployment. Support a junior developer and work with external development partners. Improve development workflows, monitoring, tooling and automation. Participate in an out-of-hours rota for critical incidents. Required Skills & Experience 3–5 years' professional software engineering/full-stack experience. Strong JavaScript/TypeScript and React/Next.js experience. Back-end development using Node.js or similar. REST APIs, third-party integrations and SQL/NoSQL databases. Git, cloud platforms, Kubernetes and modern development workflows. Experience contributing to iOS/Android mobile applications. Pragmatic problem-solving and ownership of existing systems. Effective, responsible use of AI-assisted development tools. Desirable Node.js/NestJS, PostgreSQL/Prisma, Redux Toolkit/RTK Query, native/cross-platform mobile, Docker, CI/CD, webhooks, automated testing and monitoring. Experience in an in-house SME team and working with external partners. Experience integrating AI features and developing data pipelines. Experience with headless CMS platforms such as Strapi or Directus. Experience with realtime integrations, payments or complex data synchronization Benefits: 6 weeks holiday, including bank holidays 52 Weeks sickness available Employee assistance programme Enhanced maternity and paternity package Contributory pension scheme (4%) Store discounts through Perkbox Staff discount 20% E-Car Scheme Cycle to work scheme Job particulars: Only accepting UK applicants located near to our Animal Trust Surgeries Primary place of work Warrington Animal Trust (WA1 1RU) 40hr week Monday-Friday with on call duties Job ad last updated 1/9/26 Closing date 28/9/26