Jairo Mancebo

Build and own multi-tenant dealership operations features for 86 dealerships as one of 6 fullstack engineers across Next.js App Router, NestJS, and PostgreSQL. Design PostgreSQL-backed data workflows and maintain an AI-assisted document parsing pipeline with OpenAI, processing ~100 documents/day and eliminating roughly 5 hours of manual operator work per day.

Delivered features for a consumer-focused password management platform spanning web, mobile, and browser extension experiences, supporting ~700k MAU during tenure. Owned the user onboarding flow end-to-end across the web client, improving completion paths and frontend maintainability using React and TypeScript.

Led hands-on engineering at a consulting firm with 60% IC / 40% management, directly managing 3 engineers across Next.js and NestJS client engagements. Rescued a struggling client engagement by restructuring delivery and ownership, improving morale, communication, and overdelivery; the client signed two additional contracts.

Delivered greenfield builds and inherited codebases as a senior IC across multiple client engagements using React, Next.js, and Node.js. Led architecture and MVP delivery for a legal/regulatory platform and built a greenfield insurance quoting platform that scaled to ~100k MAU.

Maintained and developed features for an international enterprise multi-instance web application using JavaScript, PHP, and legacy technologies in a collaborative enterprise environment.

Built web, desktop, and CLI applications integrated with electronic devices as part of a domotics home automation solution. Developed across Node.js, ASP.NET, C#, HTML, and CSS.

Pursued a degree in Software Engineering, focusing on software development technologies and practices.

Earned the Claude Certified Architect – Foundations certification from Anthropic.

Earned the Claude Certified Developer – Foundations certification from Anthropic.