Postúlate en Kit Empleo: kitempleo.com.ar/empleo/q2h54

We're looking for a modern, AI-empowered engineer — strong fundamentals, opinionated about good design, and fluent in agentic tooling — 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.Why It's Interesting: You'll be working alongside a talented, hand-picked senior team.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.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.Interesting consumer AI features — a live-shopper dashboard, an in-funnel AI chatbot, and the plumbing for everything that comes after.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.Skills Required: 6+ yrs building production back-ends; comfortable owning a service end-to-end Strong in a modern typed stack (TypeScript/Node or Python/FastAPI) Built and maintained third-party API integrations at scale (auth, retries, rate limits, webhooks, idempotency) Hands-on with agentic AI tooling — Claude Code in daily SDLC, LLM API integration, prompt + eval discipline Opinionated and direct — pushes back on scope, holds the bar on docs and tests Cloud + IaC (AWS or GCP, Terraform, Docker, CI/CD pipelines) Bonus: VLM/RPA or browser-automation experience for provider fallback paths #J-*****-Ljbffr

Postúlate en Kit Empleo: kitempleo.com.ar/empleo/q2h54

📌 Backend Developer Sr (Buenos Aires)
🏢 Celara
📍 Buenos Aires