Professional profile

Johnny Gregorio

Backend and full-stack engineering. Architecture, contracts and consulting.

Contact & practice

linkedin.com/in/johkker · johkker@gmail.com
Brazil · Remote · English and Portuguese

Summary

Hands-on engineer with backend depth and full-stack capability. Professional practice since January 2022. Experience with APIs, integrations, data flows, product development and investigating production problems.

ArchOffice

Software Architect & Tech Lead
February 2026 — present. Consulting across client projects.

Selected professional contributions

Designed a performance roadmap and implemented changes with the team. With about 30% completed, an event platform supported production peaks of up to 6,000 users per hour through its registration journey.
Redesigned ingestion logic and implemented changes with the team, reducing daily upsert combinations from over 30 million to thousands using streaming and batching.

Reported experience results; clients remain anonymous. These are not maximum-capacity benchmarks.

Personal projects

Arapé Records — Live platform for my record label. Product, UX/UI, frontend, backend and operating tools. Next.js, NestJS and PostgreSQL.

RapTrak — Functional, unreleased app for battle discovery, crew management and MC profiles. Ownership of product, design, app, backend and administration.

Learning & interests

Hands-on Kenzie training began in July 2021. First professional contract in January 2022. Biomedical sciences undergraduate interested in bioinformatics, diagnostics and synthetic biology.