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Nícolas Cleiton

@ncolascleiton

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Full Stack Developer at Clube Certo building partner integrations for workflows involving 30 million records.

Brazil

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At Clube Certo, I own end-to-end integrations with major business partners, designing data workflows involving more than 30 million records. I also established the project's testing strategy, contributing to an approximately 32% reduction in post-release maintenance requests and bug fixes.

I built a location-aware recommendation system for MenstruaTech using PostgreSQL and PostGIS, and developed its React.js and Next.js frontend and NestJS backend. I also led the project from stakeholder interviews through architecture, implementation and deployment.

For PUC Minas's Business Intelligence Extension Project, I implemented data management dashboards and built ETL flows impacting approximately 30,000 students. I'm studying Information Systems at PUC Minas and have developed applied projects in full-stack development, data processing and business intelligence.

Experience

Work history, roles, and key accomplishments

Current

Fullstack Developer

Current

Clube Certo

Nov 2025 - Present (11 months)

Owned end-to-end implementation of integrations with major business partners, coordinating data workflows involving over 30 million records. Led security hardening, designed executive dashboards, and established testing strategies that reduced post-release maintenance requests by approximately 32%.

React Next.js Vue.Js Tailwind JavaScript TypeScript NodeJS NestJS ExpressJS REST APIs PostgreSQL PostGIS MySQL Firestore TypeORM Prisma Sequelize AWS GCP Docker Terraform Jest Playwright Cypress Git GitHub Actions CI CD

Fullstack Developer

MenstruaTech

Aug 2025 - Sep 2025 (1 month)

Led the project end-to-end from stakeholder interviews to deployment. Built a location-aware recommendation system using PostgreSQL and PostGIS, developed frontend with React.js and Next.js, and integrated with Zoho for external information management.

React Next.js Tailwind NestJS ExpressJS PostgreSQL PostGIS TypeORM Docker WAL G Zoho Data Analysis

Business Intelligence Extension Project

PUC Minas

Feb 2025 - Jun 2025 (4 months)

Performed requirements gathering through client interviews and created high-fidelity wireframes. Implemented large-scale data management dashboards and built ETL flows impacting approximately 30,000 students.

ETL Data Analysis Wireframing Prototyping Dashboarding Business Intelligence