Hiring Senior Full-Stack Engineer — AI-Powered Amazon Analytics Platform

Olifant Digital is an Amazon PPC and e-commerce performance agency. We're building a platform that turns our client data into decisions: a multi-client performance dashboard, an AI co-pilot that answers questions on live account data, automated account audits that generate marketing plans and client reports, and a Search Query Performance engine that flags wasted ad spend — all cross-referenced with each client's PPC. We already have a working prototype. We're hiring the engineer who will turn it into a real, secure, multi-user product — and own it end to end. What you'll build A multi-client dashboard (metrics, trends, period comparisons) over normalized Amazon ad + sales data An AI chat/co-pilot wired to live client data via the Claude API, with streaming responses and solid prompt design A "connect account → audit → marketing plan / client report" workflow that produces ready-to-send deliverables A Search Query Performance (SQP) analyzer that joins impression-share / click-share data to PPC spend to surface cut-vs-scale actions Integrations with the Amazon Advertising API and Selling Partner API (SP-API) for ads, search-query, and Brand Analytics data Auth, team permissions, multi-tenant client accounts, and scheduled data syncs (queues/cron) Tech stack TypeScript · React + Next.js · Node.js · PostgreSQL (Prisma) · Anthropic Claude API, deployed on Vercel or AWS. (Open to a Python/FastAPI backend if that's your strength — React stays on the front end.) You should have 4+ years building and shipping production web apps end to end Strong TypeScript and React (Next.js a plus) Real backend experience: REST APIs, PostgreSQL, authentication, OAuth A track record integrating third-party APIs — handling rate limits, pagination, and token refresh Comfort working from a prototype and a spec, shipping iteratively, and owning decisions Big pluses Hands-on with the Amazon Advertising API and/or Selling Partner API (SP-API) — this is the single most valuable skill for this role LLM/AI API experience (Anthropic or OpenAI): prompt engineering, streaming, RAG, cost control Meta Marketing API / Google Ads API integration E-commerce, Amazon, or ad-tech domain knowledge Data visualization (Recharts / visx / Chart.js) How to apply Send your GitHub or portfolio and a short note on the most painful third-party API you've integrated and how you handled the auth, rate limits, and edge cases. Shortlisted candidates complete a small paid trial task before any offer. We are not looking for an agency. We are looking for someone to join us as the lead developer / CTO and build the team around him/her. We have multiple features / tools in the pipeline that we want to create this is not one off project.