Senior Fullstack Developer — Java or Kotlin, React and TypeScript

Senior Fullstack Developer — Java or Kotlin, React and TypeScriptApplylocations: London: Manchestertime type: We are a global transformation partner, with engineering and innovation in our DNA. We're trusted to help clients envision and build their businesses for the future – to run smarter today while adapting for tomorrow’s markets, customers, and communities. Our multidisciplinary teams specialise in tech strategy and business innovation, digital solutions and applications, and device and systems engineering. We excel in complex, regulated spaces including health and finance, connecting strategy, tech implementation, and operational services to help clients become more effective, resilient businesses. The role**As a Senior Fullstack Developer, you will be a hands-on member of a high-performing engineering squad, building and operating business-critical digital services.This is a backend-led fullstack role. You will use Kotlin or modern Java, ideally Java 17 or later, together with the wider JVM ecosystem, to develop reliable services, APIs and event-driven workflows. You will also contribute to modern web interfaces using technologies such as React and TypeScript.You will work in an increasingly AI-augmented engineering environment. We are looking for people who are curious about AI-augmented engineering and willing to experiment with tools that improve software delivery. You will not be expected to use AI tools every day, but you should be open to applying them where they provide clear value, while validating outputs for correctness, security and maintainability.You will contribute throughout the delivery lifecycle—from technical discovery and implementation through to deployment, production support and continuous improvement.You will take ownership of significant features and services, contribute to technical decisions, support other engineers and help maintain high standards of engineering quality.**How you will make an impact*** Build and maintain reliable JVM-based services using Kotlin or modern Java.* Deliver complete end-to-end features by connecting backend services and data models with responsive web interfaces.* Experiment with AI-assisted engineering tools where they provide clear value, such as exploring solutions, improving tests, documenting systems or investigating issues.* Validate AI-assisted outputs for correctness, security, maintainability and suitability before they are used.* Improve build, test and deployment pipelines to support safe and efficient delivery.* Identify and address technical debt, performance issues and reliability risks.* What we are looking for****Essential experience*** Strong commercial experience developing server-side applications with Kotlin or modern Java, ideally Java 17 or later.* Experience designing, building and operating APIs and distributed services.* Understanding of service reliability, maintainability, performance and security.* Proven experience writing effective automated tests.* Practical experience with relational databases.* Experience with modern frontend development, ideally using React and TypeScript.* Familiarity with CI/CD practices and supporting software in production.* Experience working collaboratively in an agile, product-focused engineering team.* Curiosity about AI-augmented engineering and a willingness to develop new ways of working.* A thoughtful approach to code quality, technical trade-offs and continuous improvement.**Desirable experience*** Practical experience using AI-assisted development or productivity tools in a software engineering context.* Cloud platforms such as AWS, Azure or GCP.* NoSQL, caching or distributed data technologies.* Experience building shared platforms, common services or greenfield technical foundations.* Experience working in regulated, financial-services or high-throughput environments.* improve the reliability, performance and operability of the services you work on;* help the team release software safely and efficiently; The role is expected to remain substantially hands-on, with opportunities to influence technical direction and support the development of other engineers.The role may include working on-site with clients, collaborating directly with client stakeholders and delivery teams to understand their needs, shape technical solutions and support successful delivery. This may involve occasional travel or agreed on-site working, depending on the project and client requirements. We welcome people from all backgrounds, regardless of their gender, personality, national origin, race, religion, colour, sexual orientation, gender identity, age, marital status, disability or veteran status. #