Full-Stack Engineer (TypeScript, Next.JS, Postgres)

Qualifications and requirements

3 to 6 years building production web applications, owning work from the screen to the database.

Strong 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.

Clear written English and comfortable working async with a small team.

Job functions

Build and ship features end to end: desktop and handheld screens, server logic, database changes and tests.

Keep a live system reliable. It runs a warehouse floor in real time: orders, inventory, handheld scanning, ERP sync and carrier labels. When it breaks, trucks wait.

Build integrations with ERPs, marketplaces and carriers.

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, and a handheld-first web UI.

Conditions

$4,500 USD a month as a full-time remote contractor, paid monthly.

Work directly with the founder on a product already running a live warehouse.

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.

Desirable skills

Experience with ERP integrations, Shopify, carrier APIs, or warehouse and logistics software.

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 major US retailers, with over 300 releases to production since September. OpsBox AI is backed by NEC X.

You would be one of the first engineers, working directly with the founder, who ran distribution centers for 20 years. This is a remote contract role for an engineer based in Mexico, Brazil, Argentina or Colombia, working mostly with US Pacific hours overlap.