Mauricio Kwitko

Senior Full-Stack Engineer · Applied AI

I ship web, mobile and backend products end to end, in TypeScript throughout, and build LLM pipelines that are measured, cost-aware and kept behind a human review step. Below is the contact sheet: every frame is a real screen from a repository you can open, running on fictitious data.

Florianópolis, Brazil · UTC−3 · overlaps US and EU hours · open to remote rolesgithub.com/mkwitkomauriciokwt@gmail.com

ABOUT

Seven years shipping products end to end, lately with AI in the loop.

I build web, mobile and real-time products from concept through architecture, implementation and scaling, and I work close to product and business stakeholders. Today I rework a company's core product platform, contribute to three new products, and coach engineers on AI-assisted development with clear quality standards. Earlier I was promoted to tech lead within nine months and led a team of seven, and I co-founded a software venture for sports, healthcare and creator businesses.

  1. 2023 – now

    Senior Software Engineer · B2B Reservas

    Reworked the core product platform that supports the wider portfolio. Contributing to three strategic products from data modeling through frontend, backend and scalability. Coaching developers on Claude Code and AI-assisted engineering.

  2. 2022 – 2023

    Software Developer, then Tech Lead · Ezoom

    Promoted within nine months; led seven-plus developers, worked with founders and product management, took part in hiring. Helped bring an API from about 3 s to 150 ms.

  3. 2020 – 2025

    Co-founder and Software Architect · Prosperapps

    Digital products for football clubs, healthcare organizations and content creators, including live-content tools. Discontinued in 2025.

  4. 2021 – 2022

    Software Developer · Smarte Estratégias

    Internal software; clean code, quality and architectural design practice.

  5. 2019 – 2021

    Software Developer · Embber

    Web applications in React, Angular and TypeScript; AR/VR experiences at a Tecnopuc startup in Porto Alegre.

Product engineering
Product conception, end-to-end feature ownership, user and stakeholder collaboration.
Frontend and mobile
TypeScript, React, Next.js, React Native, Angular.
Backend
Node.js, Fastify, NestJS, Python, FastAPI, REST, WebSockets.
Data and infrastructure
PostgreSQL, Prisma, Redis, AWS, data modeling, system design.
Applied AI
LLM pipelines with evaluation and human review, Claude Code, AI-assisted development, technical mentoring.
Education and languages
Technology degree in Cloud Computing, Descomplica (2024–2026). Portuguese native, English professional working proficiency.

Engineering areas

Frontend
React, Next.js, TypeScript, accessible components, TanStack Query.
Backend
Node.js, Fastify, PostgreSQL, Prisma, OpenAPI contracts, authentication, integration adapters.
Mobile
React Native, Expo Router, offline-first sync, push notifications.
Applied AI
LLM integrations, orchestration, tool use, evaluation and human-in-the-loop pipelines.

Stack
Decision