Name: Matheus Fischer
Title: Senior Software EngineerReact · React Native · Next.js · Node.js · TypeScript
Location: Blumenau, SC, Brazil · UTC−31–⁠2 h ahead of New York · 4–⁠5 h behind Central Europe
Languages: English (fluent) · Portuguese (native)
Status: Open to remote roles, US and EU time zones
Résumé · Rev: Résumé (PDF)2026-09-01
Photo

Web and mobile products, shipped end to end. From industrial automation to AI features.

I’m a Senior Software Engineer in Blumenau, Brazil, with 8+ years building web and mobile products in React, React Native, Next.js, Node.js and TypeScript, in production on AWS and Azure. I’ve led a product squad as tech lead. I’m currently building AI features (semantic search with embeddings and a vector database) and two mobile apps of my own. My background is in industrial software: operator interfaces for packaging machines and a computer-vision laser cutter, before moving into web and mobile products.

Download résumé (PDF)

Currently

BEON Tech: Designing and shipping AI semantic search, with embeddings and Pinecone in place of keyword search, on a ~900-page Next.js marketing site, working daily in English with a distributed LatAm/US team.
AI coding agents: Bringing AI coding agents into the team’s everyday workflow, cutting turnaround on repetitive frontend and content work.
Dufit: Live on the App Store and Google Play: a React Native app for personal trainers and their students, built and operated independently.
DuoBaby: Launching September 2026: an offline-first baby-routine tracker with conflict-safe sync between caregivers.
MBA: Business Administration at Fundação Getulio Vargas (FGV), expected 2027.

Experience

Six roles since 2018: industrial software first, then web and mobile products, then leading a team, now AI features for an international B2B company’s marketing site.

Senior Software Engineer
Feb 2022 – Present, 4 yrs 8 mos
BEON TechBuenos Aires, Argentina · remote from Brazil
AI semantic search replaced keyword search across a ~900-page site
- Next.js
- React
- TypeScript
- Node.js
- Pinecone
- Vercel
- Acoustic Content (WCHTools)
- GitHub
Frontend and content-platform engineer for the marketing website of an international B2B company: roughly 900 pages of blog posts, case studies and event content, built with Next.js.
- Own performance, SEO and scalable content delivery for a ~900-page Next.js marketing website.
- Designed and shipped the product’s AI semantic search: embeddings plus Pinecone vector retrieval replaced keyword search across the full content library.
- Introduced AI coding agents into the team’s workflow, cutting turnaround on repetitive frontend and content tasks.
- Automated the staging-to-production publishing pipeline for dynamic content in Acoustic Content (WCH), removing manual release steps and reducing publishing errors.
- Work daily in English with a distributed team across Latin America and the United States.
Freelance Software Engineer
2023
BE1 TecnologiaBrazil · concurrent freelance project
A field-service app replaced a phone-and-spreadsheet process
- React Native
- Node.js
- PostgreSQL
- AWS
Sole engineer on a field-service app for industrial tobacco-drying machines.
- Delivered a React Native app for maintenance tickets and consumables ordering, end to end.
- Built the mobile app, the Node.js REST API, the PostgreSQL data model and the AWS infrastructure.
- Field technicians open and track service tickets on site, and customers reorder parts from the app, replacing a phone-and-spreadsheet process.
Tech Lead
Mar 2020 – Feb 2022, 2 yrs
Mout’s Soluções em TIBlumenau, SC, Brazil
A squad of four shipped iOS and Android apps for an international beverage company
- React Native
- React
- Angular
- Node.js
- Azure
- PostgreSQL
Led a squad of four engineers building iOS and Android apps and internal web systems for an international beverage company.
- Owned technical decisions and architecture across React Native, React and Angular front ends backed by Node.js services on Azure and PostgreSQL.
- Ran delivery with Scrum: sprint planning, estimation, code review and release management.
- Mentored mid-level and junior developers.
Frontend Instructor (part-time)
Mar – Jun 2021, 4 mos
Apex EnsinoBlumenau, SC, Brazil
Six students taken from HTML, CSS and JavaScript to React, Angular and Vue.js
- HTML
- CSS
- JavaScript
- React
- Angular
- Vue.js
Taught the full frontend track to a six-student cohort.
- From HTML, CSS and JavaScript fundamentals through React, Angular and Vue.js.
Software Developer
Dec 2018 – Mar 2020, 1 yr 4 mos
SelgronBlumenau, SC, Brazil
Operator interfaces for packaging machines, commanding PLCs through embedded PHP
- Angular
- React
- React Native
- Node.js
- PHP
- SQL
- PLCs
Software for industrial packaging machines, combining web development with industrial automation.
- Built operator interfaces (HMIs) for packaging machines, integrating an embedded PHP layer that commanded PLCs.
- Delivered web and mobile front ends in Angular, React and React Native against Node.js and SQL back ends.
- Helped introduce Scrum across the engineering department.
Junior Software Developer
Mar – Nov 2018, 9 mos
Automatisa Laser SolutionsFlorianópolis, SC, Brazil
Computer-vision laser cutting of sublimated fabric on the roll
- Computer vision
- Laser cutting
First engineering job, on a laser-cutting product for the textile industry.
- Developed software for a laser cutter that used computer vision to cut sublimated fabric on the roll.
- Supported the company-wide rollout of Agile practices.

Each role shows the context on the left and the delivered outcome on the right.

BE1 Tecnologia appears by year only (2023) in my résumé, so its tenure is approximate.

Products

Two products I build and operate independently, from the mobile app to subscription billing.

Dufit

Live2026 – present

Status: Live on the App Store and Google Play
Role: Founder, owning the whole product: app, API, database, infrastructure, billing and marketing site
What: Personal trainers and their students, in one app.
Trainers create workouts and weekly plans; students execute them with a rest timer and log load, reps and progress.
Full ownership of the product: React Native app, Node.js API, PostgreSQL, AWS infrastructure, subscription billing and a Next.js marketing site.
Stack: React Native
Node.js
PostgreSQL
AWS
Next.js
Link: dufit.app

DuoBaby

2026

Status: Launching September 2026
Role: Founder, owning the whole product
What: A baby’s routine, shared safely between caregivers.
Offline-first React Native app to log feedings and sleep, with reports and conflict-safe sync across multiple caregivers.
Localized in English, Portuguese and Spanish; PDF/CSV export; premium subscription tier on Supabase and Railway.
Stack: React Native
Supabase
Railway
Link: duobaby.com.br

Stack

What I use every day, and everything else I have run in production.

Used dailyReactReact NativeNext.jsNode.jsTypeScript

Area	Technologies	In production at
Languages	JavaScript (ES6+), TypeScript, SQL, PHP, HTML5, CSS3
Frontend & mobile	React, Next.js, React Native, Angular, Vue.js, Gatsby, Redux, Apollo Client, Responsive design, SSR / SSG, Web performance, SEOIn production at: Selgron, Mout’s, BEON Tech, BE1, Dufit, DuoBaby	Selgron · Mout’s · BEON Tech · BE1 · Dufit · DuoBaby
Backend & APIs	Node.js, Express, REST APIs, GraphQL, JWT / OAuth, Microservices, SupabaseIn production at: Selgron, Mout’s, BEON Tech, BE1, Dufit, DuoBaby	Selgron · Mout’s · BEON Tech · BE1 · Dufit · DuoBaby
Data	PostgreSQL, SQL, Pinecone (vector database), Data modeling, Query optimizationIn production at: Selgron, Mout’s, BEON Tech, BE1, Dufit	Selgron · Mout’s · BEON Tech · BE1 · Dufit
Cloud & DevOps	AWS, Azure, Azure DevOps, Vercel, Railway, CI/CD, Git / GitHubIn production at: Mout’s, BEON Tech, BE1, Dufit, DuoBaby	Mout’s · BEON Tech · BE1 · Dufit · DuoBaby
AI	Embeddings, Semantic search, RAG, LLM-powered features, AI coding agentsIn production at: BEON Tech	BEON Tech
Testing & practices	Jest, Unit testing, Code review, Agile / Scrum, OOP, Functional programming, Technical leadership, Mentoring

Background

I trained as an industrial automation technician at SENAI-SC (2011–2012) and studied mechatronics engineering at IFSC (2013–2018). My first software jobs were on machines: a computer-vision laser cutter at Automatisa, then operator interfaces and a PHP layer commanding PLCs for packaging machines at Selgron. Apex Ensino’s 360-hour frontend program and the Rocketseat bootcamp (React, Node.js, Jest) moved me into web and mobile. I led a squad of four at Mout’s, moved to remote work with an international team at BEON Tech in 2022, and now build AI features and two products of my own. I’m doing an MBA in Business Administration at FGV, expected 2027.

Education

Expected 2027: MBA, Business AdministrationFundação Getulio Vargas (FGV)
2013 – 2018: B.Sc. Mechatronics EngineeringFederal Institute of Santa Catarina (IFSC)
2019: Frontend Developer Program (360 h)Apex Ensino
Undated: Rocketseat BootcampRocketseat · React, Node.js and Jest
2011 – 2012: Industrial Automation TechnicianSENAI-SC

Languages

Portuguese: Native
English: Fluent (professional working proficiency)

Web and mobile products, shipped end to end. From industrial automation to AI features.

Currently

Experience

Senior Software Engineer

Freelance Software Engineer

Tech Lead

Frontend Instructor (part-time)

Software Developer

Junior Software Developer

Products

Stack

Background

Education

Languages