Backend Developer SR (AM - BE - 20260512)
We're looking for a modern, AI-empowered engineer — strong fundamentals, opinionated about good design, and experienced in both agentic development tooling and AI-enabled product features — to help build and launch a new digital purchase platform. Someone who codes fast, leads by example, and can hold their own in product conversations as easily as in technical ones.
The project is for a major company modernizing how customers buy online — standing up a modern stack to run the full purchase flow online, end-to-end. We're building a brand-new back-end: a modern integration layer to multiple third-party provider APIs, the AI plumbing to power agentic features across the funnel, and an agent-facing dashboard ("Agent Co-Pilot") that lets human agents see live shoppers in real time and jump into the conversation when needed. The first AI lighthouse is a customer-facing chat assistant tied into that same plumbing — pricing, configuration, eligibility checks, hand-off to a human. This is a 3-month foundation build with a senior, hand-picked team, kicking off ASAP.
Responsibilities:
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Build and own provider connectors on the new integration framework — auth, retries, webhooks, observability, etc.
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Lead by example on technical direction — drive design discussions, unblock the team, and own the hardest pieces of the stack.
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Partner with the client's PM and product stakeholders in 1–2 week sprints — daily standups, weekly demos — pushing back on scope, proposing better solutions, and translating product intent into clean technical bets.
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Ship AI features end-to-end against the lighthouse roadmap (chatbot, Agent Co-Pilot, plumbing for what comes next).
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Set engineering practices the permanent team will inherit — clean code, tests, AI-generated docs, CI/CD, eval harnesses on LLM-touching code paths.
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Pair with the architect and tech lead on cross-cutting design; mentor through code review.
Why It's Interesting:
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You'll be working alongside a talented, hand-picked senior team.
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Greenfield rebuild, not legacy maintenance. We're migrating off the current vendor's platform onto a new, clean, modern codebase. You'll set the future patterns the new system gets built on.
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Best-in-class agentic-AI SDLC from day one. You'll help design the patterns — Claude Code across the full SDLC, AI-generated documentation, evals on every LLM-touching feature, observability built in.
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Interesting consumer AI features — a live-shopper dashboard, an in-funnel AI chatbot, and the plumbing for everything that comes after.
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Path to lead the team going forward. This 3-month build is Phase 1. The client will then ramp a permanent squad on top of the codebase you helped create — clear path into the lead role.
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