Hi, I'm

Thiago Cipitelli

I build APIs, microservices and systems that survive production. Ruby on Rails daily, Go and Java out of curiosity that became a habit.

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thiago@dev: ~

$ whoami
thiago-cipitelli
$ cat about.yml
role: Backend Developer
stack: [rails, postgres, redis, go]
location: Rio de Janeiro, Brazil
education: Computer Science @ UFF
status: ● open to new opportunities
$ ▋

experience

Backend Developer
@ Mainô
Jun 2023 — Oct 2025
- Built and maintained Ruby on Rails microservices, improving system modularity and cutting response time of critical endpoints by 20%.
- Introduced automated tests (TDD) with RSpec, raising code coverage by 15% and reducing production bugs by 30%.
- Optimized asynchronous task processing with RabbitMQ, improving distributed integration performance by 25%.
- Implemented payment integrations, including Brazilian bank slip (boleto) generation and communication with financial gateways.
- Refactored and optimized PostgreSQL queries, cutting BI report load times by 40%.
- Applied Redis caching strategies to high-traffic endpoints, lowering latency.
Ruby on RailsPostgreSQLRedisRabbitMQRSpec
Fullstack Developer
@ Laboratório de Visão Computacional
Oct 2022 — Jun 2023
- Built an interactive 3D interface for complex data visualization with ReactJS and WebGL, improving analysis capabilities for Petrobras researchers by 40%.
- Integrated the interface with image-processing RESTful APIs, ensuring real-time communication and accurate display of research data.
ReactJSWebGLREST APIs
Android Fullstack Developer
@ Freelancer
Dec 2022 — Mar 2023
- Developed an educational Android app in Kotlin, increasing engagement of 100+ early-education students by 25%.
- Managed builds and dependencies with Gradle, automating delivery and cutting deployment time by 50%.
KotlinAndroidGradle
Fullstack Developer
@ Laboratório de Metrologia — UFF
Jan 2022 — Oct 2022
- Led the migration of a DataLake from Hadoop HDFS to Azure, using Java 8 and the Spring ecosystem to refactor data services, achieving a 30% reduction in operating costs.
- Built and maintained an AngularJS web interface for data visualization and querying, serving 100+ internal users.
- Took part in agile ceremonies and performed code reviews to uphold quality and best practices.
Java 8SpringAzureHadoop HDFSAngularJS

# education

2020 — 2027BSc in Computer Science — Universidade Federal Fluminense (UFF) — ongoing

2016 — 2020Technical Degree in Informatics — CEFET/RJ

projects

api-usinas

Processes 400k+ records from ANEEL’s RALIE dataset with Kotlin, Spring Boot and coroutines: chunked parallelism, JDBC batching and native-SQL window-function rankings.

nuplot

REST API in Go with Gin: JWT authentication, bcrypt hashing, PostgreSQL with sqlc-generated queries and CSV data export.

dlrpg

Go experiment that consumes the GitHub GraphQL API to track daily contributions and turn them into RPG-style progression, persisted via sqlc.

prata-representacoes

Static business website built with Astro, designed so non-developers can edit it: all content lives in plain data files.

weight-training

Ruby on Rails application for browsing and querying a weight-training exercise dataset.

Homepage

Personal homepage in plain HTML, CSS and JavaScript, with an interactive canvas particle effect.

more projects atgithub.com/thiago-cipitelli