Full Stack JavaScript Engineer (IT) in Watford, United Kingdom

About the role We have an exciting opportunity for a Full-Stack JavaScript Engineer to join the elementsuite team-someone who's passionate about building high-quality products and tools across the stack. This role blends front-end finesse with back-end capability, and we're especially keen to meet developers who can pair modern JavaScript frameworks with solid SQL experience to help power our next-gen HR platform. You'll work closely with our Application Development team to deliver scalable, maintainable software that supports our growing user base. This is a hands-on, end-to-end role-from building intuitive interfaces using https://jobeax.com/link/tzGekrj9a8ToGEDv and https://jobeax.com/link/vOXYli0XKjB5QdMj, to writing performant queries and helping shape our data model. elementsuite is rewriting the rulebook on how enterprise software is built. Our cloud-native platform powers flexible, scalable, and beautifully simple HR and workforce management solutions. This year, we joined forces with Zellis to create an AI-enabled, end-to-end HR, WFM, and Pay solution. Together, we support some of the biggest brands in the UK & Ireland, combining deep HR domain expertise with next-generation technology to reimagine the world of work: intuitive, connected, and AI-enabled. Key responsibilities in the role will include: Building innovative, high-quality features in line with the elementsuite roadmap. Writing clean, reusable JavaScript code using modern frameworks (https://jobeax.com/link/tzGekrj9a8ToGEDv, https://jobeax.com/link/vOXYli0XKjB5QdMj). Creating responsive, user-focused UI/UX with HTML5, CSS3, and SASS. Designing and writing performant SQL queries to support data-driven functionality. Collaborating with other developers and designers to architect robust front-end and back-end solutions. Testing your code with appropriate unit and integration tests. Estimating and managing your workload with a focus on quality and efficiency. Refactoring and improving existing code to maintain performance and scalability. Participating in peer code reviews, offering constructive feedback, and learning from others. Supporting operational sessions with technical insight and analysis. Staying mindful of performance across both client and server-side code. Candidate profile: Skills & experience Proven experience in a full-stack or JavaScript-focused software engineering role. Strong JavaScript skills and experience with modern frameworks (https://jobeax.com/link/tzGekrj9a8ToGEDv, https://jobeax.com/link/vOXYli0XKjB5QdMj, jQuery). Solid working knowledge of SQL, relational databases, and writing efficient queries. Good understanding of API integration and data flow between front-end and back-end. Familiarity with data visualisation libraries such as D3.js. Strong grasp of MVVM architecture, responsive design, and UI/UX principles. Experience with version control tools like Git or SVN. A pragmatic mindset-able to balance time, cost, and quality while delivering value to users.