Full Stack Engineer (TypeScript, Next.js, Postgres), Remote, Latin America

OpsBox AI is a warehouse management system where the customer changes how the warehouse runs in plain English, and a deterministic engine runs it. It is in production at a signed customer shipping thousands of orders to retailers like Macy's, built by the founder with AI tooling: over 300 releases to production since September. OpsBox AI is backed by NEC X. This is a remote contract role for an engineer based in Mexico, Brazil, Argentina or Colombia, working mostly US Pacific hours overlap.

What you will do

• Build and ship features end to end: desktop and handheld screens, server logic, database changes, tests.
• Keep a live system reliable. It runs a warehouse floor in real time: orders, inventory, handheld scanning, ERP sync, carrier labels. When it breaks, trucks wait.
• Build integrations: ERPs (NetSuite, Acumatica), marketplaces (Shopify, Amazon, Walmart), carriers (UPS, FedEx).
• Extend the rules engine that turns a manager's plain-English request into a rule the system runs.
• Work directly with the founder on what to build, and talk to customers when a request needs it. Stack TypeScript, Next.js, React, Prisma, Postgres, Vercel, LLM APIs for rule authoring, ZPL label printing, a handheld-first web UI, and ERP, marketplace and carrier APIs.

You might be a fit if

• You have 3 to 6 years building production web applications, and you own work from the screen to the database.
• You are strong in TypeScript and SQL.
• You have shipped software other people depended on every day, ideally something transactional or operational.
• You use AI coding tools seriously and know where they help and where they do not.
• You write clear English and are comfortable working async with a small team.
• Bonus: experience with NetSuite, Shopify, carrier APIs, or warehouse and logistics software. Pay
• $4,500 USD a month, as a full-time remote contractor. How we hire A 30 minute conversation, then a paid half-day working session on a real problem from the backlog, then references. We move within two weeks.