Portfolio / 2026

Guilherme Lambrecht

Full-stack developer building fast, thoughtful products from database to pixel.

Available for remote work Scroll to work
Stack
/ Selected work

Projects

A selection of full-stack products, interfaces and experiments built with performance and clarity in mind.

2026 — Live
Full stack · Booking platform

AcePlay

Live booking and payments platform for private beach tennis and padel coaches: public availability, one-tap booking and earnings in one place. Containerised and tested end to end.

TypeScript NestJS Next.js PostgreSQL Docker Jest
aceplay.com.br
2025
Full stack · Study dashboard

Lúmen

Study-control platform with a weekly dashboard, flashcards, subject management and routine planning — built to keep studying organised.

React TypeScript Express Prisma PostgreSQL
2025
Website · Front-end

Vocare Contabilidade

Website for the accounting firm I currently work at — design and front-end built from scratch.

React JavaScript Tailwind
2026
Full stack · Travel agency

CoinPel

Management panel for a travel agency: registered clients and drivers, authentication, confirmed, pending and finished trips, plus a full activity log.

PHP Laravel Auth Tests
Guilherme LambrechtPelotas, 2026
/ About me

The manifesto

01

The craft

Full-stack, schema to pixel. TypeScript, NestJS, Next.js, PostgreSQL, Jest, Docker. I built AcePlay end to end: a booking and payments platform for private sports coaches in Pelotas. Before it, booking a lesson meant messaging the coach and waiting to hear which slots were open. Now availability is public, booking is one action, and earnings are tracked in the same place. It is live at aceplay.com.br.

02

The approach

Tested and containerized from the first commits, not retrofitted. The hardest problem was the one that sounds trivial: guaranteeing the same slot can never be booked twice. Two people can tap “book” in the same second, and lessons overlap without sharing a start time — so the guarantee lives in the database, not in application code. That is where I learned the last 20% — deploy, race conditions, the bug that only exists in production — is the actual engineering.

03

The human

Pelotas, Brazil — UTC−3. Nobody asked me to build AcePlay. I watched coaches around me lose hours to scheduling by hand, and built the thing that fixes it.

Location Pelotas, RS — Brazil (UTC−3)
Availability Open — remote only
Full-Stack TypeScript React Node.js NestJS Next.js Python PostgreSQL Docker Design
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WhatsApp
(53) 98103-0317Pelotas, RS — UTC−3
Guilherme.
Full-stack developer Pelotas, RS — Brazil
Available — remote only © 2026 Guilherme Lambrecht
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