Lucas Barzan
Full-Stack AI Engineer · Brazil · Remote
Full-Stack AI Engineer with 6+ years of experience building production software across AI, fintech, and healthcare. Currently at Satsuma.ai, building systems that connect companies’ existing products and APIs to AI assistants through MCP. Spent over four years working on GooRoo Crédito’s payroll lending platform, co-architecting it from scratch into an ecosystem of ~15 microservices and building cloud-based solutions that helped drive a 5x increase in monthly revenue. Also built an AI document analysis pipeline using AWS Textract and OpenAI to turn payslips into structured, validated data for credit analysis. Works across the stack and owns features end to end, from database design and back-end services to user-facing applications, primarily using TypeScript, Node.js, React, Python, and AWS.
Experience
Full-Stack AI Engineer · Satsuma.ai
2026-09 – Present · United States (Remote)United States (Remote)
- Building infrastructure that connects companies’ existing products and APIs to AI assistants through technologies like MCP, enabling users to access data and take actions directly through AI-powered experiences.
Senior Full-Stack Software Engineer · GooRoo Crédito
2025-07 – 2026-09 · São Paulo, Brazil (Remote)São Paulo, Brazil (Remote)
- Built an AI-powered payslip analysis tool leveraging AWS Textract (OCR) and OpenAI LLMs to transform unstructured payroll documents into structured, validated data for credit analysis.
- Designed and implemented an external RESTful API enabling partner integrations with our system, expanding platform reach and unlocking new revenue streams. Tech stack: Node.js, Express, TypeScript, PostgreSQL, AWS.
- Led comprehensive code reviews across back-end and front-end codebases, raising engineering quality, reducing QA-identified issues, and lowering production bugs.
- Provided technical guidance across back-end and front-end development, answering architectural questions, supporting UI implementation, and removing blockers to speed up delivery.
Full-Stack Software Engineer · Finnet
2022-02 – 2025-06 · São Paulo, Brazil (Remote)São Paulo, Brazil (Remote)
- Co-architected a payroll loan platform from scratch for a fintech (GooRoo Crédito), implementing authentication with AWS Cognito, front-end integration flows with React/Vue, and code organization standards that let ~15 microservices scale reliably with Node.js, Express, TypeScript, and PostgreSQL.
- Delivered a high-throughput cloud-native solution with AWS Lambda, SQS, and DynamoDB that processed dozens of loan requests per second, directly driving a 5x increase in monthly revenue.
- Implemented automated notifications via AWS SNS (SMS, email, and system alerts), increasing customer engagement and reducing delays in critical business processes.
Full-Stack Software Engineer · Laboratório Bridge
2021-06 – 2022-02 · Florianópolis, Brazil (Remote)Florianópolis, Brazil (Remote)
- Identified and resolved application bugs in e-SUS APS, an electronic medical record system widely adopted in health units across Brazil, improving reliability for thousands of healthcare professionals.
- Created a log analysis and summarization tool in JavaScript, significantly accelerating support workflows and improving response times to user issues.
- Performed critical correction procedures on PostgreSQL production databases, ensuring data integrity and high system performance.
Software Engineer · Universidade Federal de Santa Catarina
2020-08 – 2021-01 · Florianópolis, Brazil (Remote)Florianópolis, Brazil (Remote)
- Developed core Android features for CovidApp, an open-source Bluetooth-based contact tracing solution built to support UFSC during the coronavirus pandemic.
- Implemented backend endpoints in Python for system integration, improving data flow and overall app efficiency.
- Conducted extensive software testing to ensure reliability and accuracy of contact tracing functionality.
Freelance Software Engineer · Freelance
2018-01 – 2018-09 · Brazil (Remote)Brazil (Remote)
- Developed 8 native Android applications, including "Coins and Notes Counter" (200,000+ downloads, ~700 ratings, 4.5+ average, later acquired by an international client) and "Character Generator" (30,000+ downloads, later acquired by an international client).
Education
Bachelor's degree in Computer Science · Federal University of Santa Catarina
2019 – 2022Earned a Bachelor’s degree in Computer Science from UFSC (Federal University of Santa Catarina), gaining solid foundations in software engineering, algorithms, and database systems.
General English Course in C2-level · European School of English (ESE)
2024 – 2024Achieved C2-level English certification at ESE, Malta — an award-winning institution accredited by EAQUALS, IALC, and Quality English.
GoStack Bootcamp · Rocketseat
2019-07 – 2020-07Graduated from Rocketseat’s GoStack Bootcamp, building end-to-end applications with Node.js, React, and React Native, and strengthening full-stack development expertise.
Skills
- LanguagesTypeScript, JavaScript, Python
- Frameworks & ToolsNode.js, Express, React, Vue, Next.js, PostgreSQL
- Infrastructure & AIAWS, Docker, Model Context Protocol (MCP), AI/LLM Applications, Distributed Systems, Microservices
Projects
Coins and Notes Counter
A native Android personal finance app with 200,000+ downloads, ~700 ratings, and a 4.5+ average on the Play Store; also built a web version with TypeScript and React. Acquired by an international client in April 2021.
TypeScript · React · Android
Pomozzo
A productivity platform based on the Pomodoro Technique, enabling task focus and progress tracking; developed with Node.js, Next.js, AWS, and TypeScript. Successfully acquired by an international client in May 2021.
Node.js · TypeScript · React
BRFlor App
Custom Android application in Flutter for recording tree measurements in the field, with offline data storage and API synchronization. The project was successfully developed and delivered to the client in April 2022.
Android · Flutter
Certificates
AWS Certified Cloud Practitioner · Amazon Web Services
Sep 2023EF SET English Certificate 91/100 (C2 Proficient) · EF SET
Sep 2023JSNSD: OpenJS Node.js Services Developer · The Linux Foundation
May 2023
Awards
2nd Place — Pixelthon Hackathon · Pixelthon
Jul 2020Achieved 2nd place in Pixelthon, a technology hackathon focused on innovation and software development.
Brazilian Olympiad in Informatics (OBI 2019) · OBI
Nov 2019Ranked 103rd out of 1,991 participants in the Senior Programming category of the XXI Brazilian Olympiad in Informatics (OBI), one of Brazil’s most prestigious national programming competitions.
1st Place — Brazilian Navy Essay Competition · Brazilian Navy
Dec 2017Winner of the essay contest "Operation White Swan" (“Operação Cisne Branco”), organized by the Brazilian Navy in Laguna, Santa Catarina, Brazil.