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




- Build and own provider connectors on the new integration framework — auth, retries, webhooks, observability, etc.
- Lead by example on technical direction — drive design discussions, unblock the team, and own the hardest pieces of the stack.
- 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.
- Ship AI features end‑to‑end against the lighthouse roadmap (chatbot, Agent Co‑Pilot, plumbing for what comes next).
- Set engineering practices the permanent team will inherit — clean code, tests, AI‑generated docs, CI/CD, eval harnesses on LLM‑touching code paths.
- Pair with the architect and tech lead on cross‑cutting design; mentor through code review.

Benefits & Opportunities
- You'll be working alongside a talented, hand‑picked seni

📌 Backend Developer SR (Buenos Aires)
🏢 Celaralabs
📍 Buenos Aires