Mid-level Full Stack Developer

Internal systems that erase manual work.

I work in TypeScript and .NET, building internal systems end to end — from the data model to the deploy. The six I have shipped so far remove more than 150 hours of manual work every month.

See my experience↓GitHub LinkedIn

CurrentlyGreenfive · Ancar IvanhoeFour systems built from scratch and shipped to production: benefits, AI-assisted quotes, accounting provisions and managerial cost classification.

Impact−154 h/monthHours of manual work removed every month across the four systems — figures validated by the business teams.

Also currentControlbioA lab LIMS (ISO/IEC 17025) and an electronic time clock, alongside Greenfive.

Impact2 in-house systemsA lab LIMS and an electronic time clock replacing scattered tools and manual spreadsheets, built from scratch.

01About

From maintaining systems to building them.

I came from IT and infrastructure while studying development on the side — today I build the systems I used to only maintain.

Before writing code I build labs, prototypes and documentation. That is how I line up what the team needs with what the system needs.

How I workLabs and prototypes before codeSpec and tests before implementationShipped in slices the team can see working

02Experience

Four years across infrastructure and development.

I started in support and networking, which gave me an infrastructure instinct I still use in architecture and deployment decisions.

Apr 2026 — present

Greenfive Tecnologia

Mid-level Full Stack Developer

Placed at Ancar Ivanhoe. I drive architecture decisions and code review for the team, with the spec and tests written before the code (SDD and TDD) in an AI-assisted workflow.

TypeScriptNestJSReactNext.jsPostgreSQLDockerPythonFastAPILangChainGoogle Cloud Run

−154 hof manual work/month

Benefits management (meal vouchers)−70 h/monthRequesting, approving and paying across the group's 94 companies, wired into finance.

Managerial cost classification−48 h/monthPurchase requisitions checked inside Oracle Fusion: supplier and cost classification validated against the company's historical base before submission.

OCR and quoting agent−30 h/monthReads supplier quotes from PDFs and images and returns pre-compared purchasing options.

Contingency provisioning−6 h/monthLegal-case provisions by category and co-participation, posted straight into JD Edwards.

Mar 2026 — present· concurrent

Controlbio

Mid-level Full Stack Developer

Working with a team to replace disconnected tools and spreadsheets with two in-house systems, writing the spec before the code (SDD) and shipping via CI/CD straight to Coolify on an internal VPS.

.NETASP.NET CoreNext.jsTypeScriptPostgreSQLDockerGitHub Actions

Lab LIMSDelivered core records, auth, and Excel import/export on a clean .NET architecture (CQRS) and PostgreSQL, following ISO/IEC 17025. Work orders and sample intake are next on the roadmap.

Electronic time clockManual and real-time stopwatch time tracking, with a team view for managers and report exports, replacing the previous manual process.

Jul 2025 — Mar 2026· concurrent

Proscale

Junior Full Stack Developer

Built and maintained the internal system in React and Express, with global state in Redux and data modelling on MongoDB.

ReactExpressReduxMongoDB

May 2024 — May 2025· concurrent

Centro Clínico Vida e Saúde

Full Stack Developer

Ran the whole cycle solo: the official Flutter app and a health-plan system with payments, invoices and recurring subscriptions. NestJS backend, React front end, PostgreSQL with Redis caching. Telemedicine tripled the clinic's patient reach, health-plan sign-ups grew, and billing that used to be manual went out automatically.

NestJSReactFlutterPostgreSQLRedisDockerJest

3×in patient reach

Feb 2024 — Sep 2024· concurrent

MIP

Backend Developer

Led the backend team building services in NestJS with WebSockets and Prisma, in an agile setup.

NestJSTypeScriptWebSocketsPrisma

Before that · IT and infrastructure

Feb 2024 — Mar 2026TerraIT Analyst · NOC N2/N3Monitoring, advanced diagnostics and troubleshooting across networks and infrastructure.

May 2023 — Jan 2024Playvender do BrasilIT AnalystServers, networks and Oracle database administration.

03Education

Education and languages.

Feb 2023 — Dec 2025Associate Degree in Systems Analysis and DevelopmentEstácio

Languages

PortugueseNative

EnglishFluent

FrenchBasic