Senior/Lead Full Stack Engineer (Node+React+AI)

ABOUT THE ROLE

In this role, you will design and build scalable full-stack applications that turn operational and inventory data into intuitive cloud-native products. You will shape the architecture of tools that help retail teams identify stock discrepancies, prioritize actions, and improve on-shelf availability. The project supports a major UK retail group serving millions of shoppers across hundreds of stores.

RESPONSIBILITIES

• Build end-to-end product features using React, Node.js, TypeScript, and serverless AWS services
• Design and implement REST APIs and integrations with GraphQL services to support reliable application functionality
• Develop AWS Lambda functions and configure API Gateway integrations with secure access and appropriate CORS handling
• Improve application performance, scalability, and maintainability across frontend and backend components
• Refine system architecture by applying clean abstractions, dependency injection, SOLID principles, and effective component decoupling
• Implement unit, integration, and end-to-end tests that support application reliability and the Test Pyramid strategy
• Monitor production systems through logs, metrics, and distributed tracing, and troubleshoot performance and reliability issues

Enhance CI/CD pipelines, participate in code reviews, and promote consistent engineering practices across the team

REQUIREMENTS

• 7+ years of commercial software development experience with full-stack applications
• Strong proficiency with React, including Hooks, component architecture, state management, and modern application patterns
• Strong proficiency with Node.js and TypeScript, including asynchronous processing, error handling, and scalable backend design
• Experience with RESTful APIs, GraphQL integrations, and event-driven architectures
• Experience with AWS Lambda, API Gateway, retries, dead-letter queues, and serverless integration patterns
• Knowledge of PostgreSQL and MongoDB, including indexing strategies and query optimization
• Strong understanding of automated testing, clean architecture, dependency injection, SOLID principles, and component decoupling

Experience with AI engineering tools, AI-assisted development workflows, or evaluation harnesses

Upper-Intermediate English for effective communication within a cross-functional team