Senior Node.js Engineer (AWS Serverless)

We are looking for a Senior Node.js Engineer (AWS Serverless) to join the team supporting a well-established UK-based e-commerce retailer operating across the US, UK, and APAC markets under 16+ partner brands. The client runs a high-volume, subscription-driven commerce platform with complex multi-market business logic and is currently midway through a major platform modernisation initiative — transitioning from a legacy monolithic system to a modern MACH architecture (Microservices, API-first, Cloud-native, Headless). As part of the engineering team, you will contribute to building scalable cloud-native services and modern backend solutions using Node.js and AWS Serverless technologies, helping drive the next generation of the client’s global commerce platform. Responsibilities: Build AWS Lambda microservices (Node.js/TypeScript) behind API Gateway, integrated with Commerce Tools and D365. Design and optimise DynamoDB data models and access patterns for high-throughput e-commerce. Contribute to CI/CD pipelines and collaborate with DevOps on infrastructure automation. Support knowledge transfer to client engineers on AWS serverless best practices. Delegate multi-step tasks to AI agents; review diffs, verify output, and maintain accountability for what gets committed. Requirements: Experience: 5+ years in Software Development Backend: Strong, production-grade proficiency in Node.js and TypeScript. Cloud5/Serverless: Production-grade expertise with AWS Lambda, API Gateway, and DynamoDB (not just theoretical). Architecture: Robust experience with microservices architecture and greenfield development. AI Tooling: You are a self-sufficient builder who ships fast, communicates clearly across international teams, and operates AI agents as a genuine force multiplier — delegating, verifying, and iterating, not just prompting. English level: Upper-Intermediate+ Tech Stack Ecosystem (Nice-to-Have): Exposure to ECS, Commerce Tools, Netlify, Contentful, D365, or Akamai We offer*: Flexible working format - remote, office-based or flexible A competitive salary and good compensation package Personalized career growth Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more) Active tech communities with regular knowledge sharing Education reimbursement Memorable anniversary presents Corporate events and team buildings Other location-specific benefits *not applicable for freelancers