Hands-on Engineering Lead: Store Migration to Next.js + AWS Serverless (TypeScript)

We're an online retailer selling home and kitchen products across Germany, Austria and Switzerland. Our store runs on Shopify Plus, with about 25,000 products and 8,000 orders a month. We've outgrown it and are moving to a custom headless platform: a Next.js storefront and a TypeScript backend on AWS. We need someone to lead the migration and our remote team of 4 developers. You'll still review and write code yourself. What the work looks like Plan the migration and break it into milestones Lead the team: code reviews, standards, unblocking people Migrate products, customers, orders and URLs without losing SEO rankings Keep stock, orders and products in sync with our Odoo ERP through queues and webhooks Plan the cut-over with a tested rollback, so live sales never go down Set up safe use of AI coding tools: CI gates, tests and human review before anything ships Our stack Frontend: React, Next.js, TypeScript, React Query Backend: Node.js (TypeScript), REST and GraphQL, Python for data scripts Data: PostgreSQL (Aurora), DynamoDB, Redis AWS: Lambda, API Gateway, ECS Fargate, SQS, EventBridge, S3, CloudFront, KMS Infrastructure and CI: Terraform, Docker, GitHub Actions Quality and monitoring: Vitest, Playwright, Datadog, PostHog You should have Led at least one live e-commerce or platform migration 2+ years leading or managing developers Strong TypeScript/Node.js, React and PostgreSQL Production experience with AWS serverless and Terraform Connected a store or platform to an ERP, CRM or order system Nice to have: GraphQL APIs, event-driven architectures, experience with catalogs of 100k+ SKUs (we plan to grow there) Engagement: hourly, 30–40 hrs/week, long-term with the option to continue after launch. You'll need at least 4 hours of overlap with Central European Time (CET). Budget: $500, fixed for this project for now with possibility of future engagements. Please start your proposal with the word "rollback" and tell us about the last migration you led and what went wrong during it.