Senior Fullstack Software Engineer - UK

Salary: £65,000 - 65,000 per year Requirements: • Proven experience in full-stack software development, including design, development, testing, and deployment. • Deep experience in at least one of the following: Java, Python, C#/.NET, or full-stack JavaScript (React, Node.js). • Flexibility and confidence picking up new technologies as required. • Strong understanding of Agile and DevOps practices, with a focus on continuous integration and delivery. • Experience working as a polyglot developer. • Experience with cloud platforms such as Azure, AWS, or GCP. • Experience with infrastructure as code, such as Terraform. • Familiarity with CI/CD pipelines, automated testing, and modern software development practices. • Knowledge of microservices, containerisation such as Docker and Kubernetes, or serverless architecture. • Awareness of well-architected and secure-by-design principles. • Previous experience in a senior engineering role, guiding teams to successful delivery, is desirable. • Proficiency in multiple programming languages is desirable. • Experience working on public sector projects is desirable. • Experience in a consulting environment is desirable. • Ability to write clean, maintainable code and optimise software for performance and scalability. • Ability to design and implement software that meets business and technical requirements. • Ability to ensure key business logic is covered by tests. • Proficiency in automated testing frameworks and ensuring software is reliable and bug-free. • Experience conducting code reviews and maintaining high coding standards. • Effective collaboration with cross-functional teams. • Strong communication skills for explaining technical concepts to diverse stakeholders. • Passion for learning new technologies and improving software development processes. • Drive to adopt new tools and methodologies that enhance team performance and software quality. Responsibilities: • Design, develop, and maintain complex software solutions that are robust, secure, tested, and scalable. • Contribute to software architecture decisions aligned with project and business goals. • Mentor and support junior engineers to develop their skills and promote best practices. • Collaborate with product management, UX/UI, DevOps, QA, and other cross-functional teams to meet business requirements. • Implement and optimise CI/CD pipelines to improve development efficiency and software quality. • Conduct code reviews and provide constructive feedback to improve team performance and code quality. • Troubleshoot and resolve technical issues to keep software running smoothly and efficiently. • Stay current with industry trends and emerging technologies, recommending and integrating them where beneficial. • Drive improvements in coding standards, testing, and documentation within the team. • Take part in early-stage project discussions by providing technical insights and recommendations. • Ensure development processes are followed and contribute to process optimisation initiatives. • Communicate complex technical concepts effectively to non-technical stakeholders. Technologies: • AWS • Azure • C# • CI/CD • Cloud • DevOps • Docker • GCP • Support • Java • JavaScript • Kubernetes • Python • React • Serverless • Terraform • microservices • UX UI Design • ASP.NET • NodeJS • Fullstack More: We are TPXimpact, a purpose-driven digital transformation organisation supporting organisations to build a better future for people, places, and the planet. We combine experience across the public, private, and third sectors with expertise in human-centred design, data, experience, and technology to create sustainable solutions for an ever-evolving world. Our teams are collaborative and empathetic, and we work closely with clients to understand their challenges, build capability, and deliver sustainable change with positive impact. We offer 30 days holiday plus bank holidays, two volunteer days, enhanced maternity and paternity leave, life assurance, an employer pension contribution of 5%, a health cash plan, a personal learning and development budget, an Employee Assistance Programme, green incentive programmes including Electric Vehicle Leasing and the Cycle to Work Scheme, financial advice, and health assessments. We are committed to inclusion and encourage applications from all backgrounds, and we will support adjustments during the recruitment process if needed. last updated 43 week of 2026