Senior Full Stack Developer

At SThree, we’re building a next‑generation candidate and contractor digital experience — and we’re looking for a Senior Full Stack Developer to help bring it to life.You’ll play a key role in designing and delivering a new contractor onboarding and placement management platform, working across Java back‑end services and modern React front‑ends, while championing AI‑first development practices. What you’ll be working onAs part of a small, high‑impact software engineering team, you’ll:Design, develop, test, and support end‑to‑end solutions across Java (11+) back‑end and React (18+), TypeScript, JavaScript, HTML & CSS front‑end layersShape user experiences by producing wireframes, prototypes, and UI designsBuild and maintain UI‑driven automated tests and follow strong TDD practicesCollaborate with business and technology stakeholders to deliver meaningful outcomesIntegrate with wider enterprise systems (e.g. CRM, ERP, identity platforms)Configure and maintain CI/CD pipelines and infrastructure‑as‑code (e.g. Terraform)Support live systems and resolve issues end to endCoach and mentor junior engineers, fostering knowledge sharing and collaboration AI‑first developmentThis role is hands‑on with AI‑enabled engineering. You’ll be expected to:Use AI coding assistants for refactoring, test creation, debugging, and documentationDeliver measurable productivity improvements through intelligent AI usageShare learnings, document patterns, and train others during service handoversApply sound judgement on when to rely on AI and when human expertise matters most What we’re looking for Essential experience:Extensive experience building web applications on a Java technology stackStrong experience with React, TypeScript, JavaScript, and modern UI developmentRESTful API design and implementationCI/CD, test automation, and Agile delivery experienceCloud experience in Azure, including security, scalability, and performance fundamentalsStrong communication skills and a collaborative mindset Nice to have:Experience with Liferay DXPKnowledge of Azure Integration Services (API Management, Service Bus, Event Hub)Experience with identity platforms such as Azure AD, Azure AD B2C, or AWS Cognito Why join us?Be part of a collaborative, inclusive IT function with global impactGain exposure to end‑to‑end IT asset management in a complex, international environmentOpportunities to drive improvements and put your ideas into practiceA supportive team that values customer focus, ownership, and continuous improvement What's in it for you?Hybrid working options for flexibility.Bonus linked to company and personal performance.28 days holiday plus public holidays, with an annual leave purchase scheme.Private healthcare, discounted dental insurance, and health cashback scheme.Paid volunteering days and caregiver leave.Access to retail discounts and our company share scheme.What we stand forWe’re committed to ensuring that every colleague, candidate, and member of our community experiences fair, equitable, and respectful treatment. We strive to create an environment where everyone belongs, feels valued, and is supported to thrive. If you require any assistance or reasonable adjustments during the application process, please let us know. We’re here to help.Salary Range: £60,000-75,000This base salary range reflects the expected compensation for this role based on skills, experience, and market benchmarks. Final offers will be determined using objective criteria such as relevant experience and internal pay equity.