02/17/2026 updated
100 % available
Full Stack Developer
SAO PAULO, Brazil
Brazil
System Development and Analysis - FIAPJavaScript.NET FrameworkApplication Programming Interfaces (APIs)Artificial IntelligenceAmazon Web ServicesApache AntAuthenticationsMicrosoft AzureBootstrap (Software)C Sharp (Programming Language)Cloud ComputingDatabasesDevOpsScalabilityPython (Programming Language)
Senior Software Engineer | 8+ Years of Experience
I enjoy designing scalable, high-performance applications, creating robust architectures, and performance optimizations in systems. Strong understanding of ReactJS and NodeJS + NestJS enables me to deliver quality, maintainable code to meet the highest standards.
Experienced in FinTech, cloud computing, and enterprise solutions, I thrive on solving complex engineering challenges, implementing secure authentication systems, and leveraging cloud platforms like AWS & Azure for scalability. As a machine learning enthusiast, I’m also keen on exploring data-driven solutions and integrating AI-driven capabilities into applications.
? Tech Stack & Expertise:
Front-end: ReactJS, AngularJS, TypeScript, JavaScript, Sass, Bootstrap, Ant Design, MaterialUI
Back-end: Node.js (NestJS, TypeORM), C# (.NET Framework & Core)
Databases: PostgreSQL, MySQL, SQL Server, MongoDB
Security & Authentication: JWT, Firebase, Keycloak, SRP Protocol
Cloud & DevOps: AWS, Azure
Mobile: React Native
Testing & Best Practices: Jest, Cypress, Vitest, TDD, SOLID
Other: Python (Flask APIs, ML scripts), Git
Experience
Professional experience5 - 10 years
Freelancer since2017
Languages
EnglishFluentPortugueseNative speaker
Project history
I have contributed to the development of some different platforms. I got experience in front-end developing web-apps using ReactJS, Typescript, NextJS, styling with AntDesign and CSS3 . I also got backend experience developing Apis (REST with firebase authentication and ORM Sequelize) and other solutions in NodeJS. I also developed applications in react-native. Website developed: https://groovoo.app/ Details +55 (11) 991684905 arthurspo@gmail.com Links Linkedin Skills C# JavaScript Python SQL HTML & CSS & Booststrap AngularJS ReactJS React-Native Git Applications that I collaborated with: - Groovoo: https://apps.apple.com/br/app/groovoo-social-networking/id1529056214 - Archangel : https://apps.apple.com/br/app/arcanjo/id1190126520
I have contributed to the development of the company's platform and services related to the platform. I got experience in front-end developing pages using AngularJS and styling with CSS3 and Bootstrap. I also got a lot of back-end experience developing Apis (REST with JWT authentication) and other solutions in C# (applying SOLID and TDD), I also developed machine learning models in Python using several algorithms for regression and classification. I used MySQL, PostgreeSQL and SQL Server databases.