Job Title Senior Full Stack Developer (Node.js / React / AWS) Job Overview We are seeking a Senior Full Stack Developer with strong hands-on experience in Node.js, React, PostgreSQL, and AWS. This role is suited to a developer who can build secure, scalable, resilient, and high-performing applications, and contribute to modern cloud-native and event-driven solutions. The ideal candidate will combine strong engineering fundamentals with practical experience building and supporting robust services across backend, frontend, and AWS environments. Key Responsibilities * Design, develop, and maintain backend services and APIs using Node.js * Build modern, responsive, and maintainable frontend applications using React * Develop and support cloud-native solutions on AWS * Work with PostgreSQL for schema design, query development, optimisation, and data integrity * Build and support integrations using AWS services such as Lambda, SQS, API Gateway, S3, RDS, and CloudWatch * Implement event-driven, asynchronous, and resilient processing patterns where required * Contribute to technical design and translate agreed solutions into robust implementations * Apply engineering best practices across security, performance, scalability, reliability, testing, and maintainability * Support troubleshooting and incident resolution across environments * Collaborate with architects, QA, DevOps, product, and other engineers to deliver end-to-end features * Participate in code reviews, sprint ceremonies, release activities, and continuous improvement * Mentor junior developers and help raise overall engineering quality within the team Required Skills and Experience * Strong hands-on experience in Node.js backend development * Strong experience with React for frontend application development * Good experience with PostgreSQL or other relational databases * Strong hands-on experience with AWS, including services such as Lambda, SQS, API Gateway, S3, RDS, and CloudWatch * Good understanding of cloud-native, serverless, and event-driven architecture patterns * Experience designing and integrating REST APIs and service-to-service integrations * Good understanding of secure coding, scalability, performance optimisation, resilience, and observability in distributed systems * Experience with Git, branching strategies, and CI/CD pipelines * Experience with automated testing approaches across backend and frontend * Strong debugging, problem-solving, and communication skills * Experience working effectively in Agile delivery teams Desirable Skills * Experience with TypeScript * Experience with Docker and container-based deployment patterns * Experience with monitoring and operational support in AWS environments * Experience using GitHub Copilot or similar AI-assisted development tools * Experience delivering enterprise, government, or regulated digital services ACTIVE SC CLEARANCE REQUIRED Due to the nature and urgency of this post, candidates holding or who have held high level security clearance in the past are most welcome to apply. Please note successful applicants will be required to be security cleared prior to appointment which can take a minimum 10 weeks. LA International is an award-winning partner of choice for many of the world's most influential companies and government organisations. Holding Enhanced Government Security Accreditation, we are recognised as the European market leader in the delivery of Security Cleared talent to organisations that demand the very highest levels of security, compliance and assurance. An award-winning organisation, having secured the prestigious Queens Award for Enterprise: International Trade over multiple years. We are committed to fostering an inclusive, equitable and accessible workplace where everyone feels valued and supported. We welcome applications from all individuals, regardless of background or identity, and we encourage candidates who may not meet every listed requirement to still apply. If you require any adjustments or support during the recruitment process, please let us know and we will work with you to ensure a fair and accessible experience. Please Note: If a high volume of applications is received, only candidates shortlisted will be contacted.