Senior Full-Stack Software Engineer with 5+ years of experience building scalable back-end systems and dynamic front-end applications. Specialized in Node.js, TypeScript, AWS, and modern JavaScript frameworks (React, Vue), I design and deliver end-to-end solutions that solve real problems and drive business impact.

• GooRoo Crédito (2025–present) — Senior engineer leading partner-facing APIs, high-quality code reviews, and integration work across a fintech platform. Stack: Node.js, TypeScript, PostgreSQL, AWS.

• Finnet (2022–2025) — Co-architected a payroll-loan platform from scratch that scaled to ~15 microservices and 2 portals. Built a serverless producer–consumer pipeline (AWS Lambda, SQS, DynamoDB) processing dozens of requests/sec, contributing to a 5× increase in monthly revenue.
• Laboratório Bridge (2021–2022) — Worked on the e-SUS APS medical record system used across Brazil; reliability improvements, JS tooling, and PostgreSQL fixes.
• UFSC (2020–2021) — CovidApp open-source contact-tracing (Android + Python back end); testing, feature dev, and integrations.
• Freelance Software Engineer (Jan–Sep 2018) — Built 8 native Android apps with meaningful traction. Highlights: Coins and Notes Counter (200k+ downloads, ~700 ratings, ~4.5★, later acquired) and Character Generator (30k+ downloads, acquired). Also shipped Calcular Somatória UFSC for exam prep. Stack: Java (Android); web companion in TypeScript/React.

• Built and scaled fintech systems end-to-end (auth, APIs, data modeling, cloud).
• Remote-first since day one; comfortable shipping asynchronously across time zones.
• Launched consumer apps with meaningful traction and successful acquisitions.

• Coins and Notes Counter — Android finance app with 200k+ downloads and ~4.5★ avg; later acquired.
• Character Generator — Android app with 30k+ downloads; acquired.

Backend: Node.js, TypeScript, Express, REST, Microservices, Serverless Cloud: AWS (Lambda, SQS, SNS, S3, EventBridge) Data: PostgreSQL, DynamoDB Frontend: React/Next, Vue/Nuxt Scripting & Other: Python (automation/tools), Java (Android), Flutter

• B.Sc. in Computer Science — UFSC
• AWS Certified Cloud Practitioner
• JSNSD (OpenJS Node.js Services Developer)
• EF SET 91/100 (C2) — English Proficiency

English: Full professional • Portuguese: Native

• GitHub: github.com/lucasbarzan
• LinkedIn: linkedin.com/in/lucasbarzan