Saulo Arruda

Senior Software Engineer | Ruby on Rails | React | Typescript

Greater São Paulo Area

About

I’m a Software Engineer with over 25 years of experience building scalable web applications and APIs using TypeScript, React, Node.js, and Ruby on Rails. I specialize in clean architecture, maintainable code, and cross-functional collaboration. I have strong hands-on experience with backend services, modern frontend frameworks, cloud infrastructure (AWS and GCP), and AI-assisted development using tools such as GitHub Copilot and Cursor. I’m also experienced in designing robust applications, performing code reviews to ensure quality and consistency, and hiring and mentoring developers to help them grow and integrate effectively into development teams.

Experience

  • Senior Software Engineer at Suppli
    Dec 2025 - Present · 7 mos

    ERP Integrations Team

  • Senior Software Engineer at Kajabi
    Jul 2025 - Nov 2025 · 5 mos

  • Senior Software Engineer at Canals AI
    Feb 2025 - Apr 2025 · 3 mos

  • Founding Engineer at uMode
    Nov 2018 - Jan 2025 · 6 yrs 3 mos

    - Designed and implemented core SaaS products (Fashion PLM and CRM) from scratch. - Stack: Ruby on Rails, Node.js, TypeScript, Vue.js, MySQL, MongoDB, Redis, DynamoDB, BigQuery. - Built scalable APIs and serverless microservices using AWS (Lambda, RDS, SQS, SES) and GCP (Cloud Run, Docker). - Maintained a robust test suite with Jest, RSpec, and Cypress. - Hired and mentored developers and led process improvement using the Kanban Maturity Model. - Developed WhatsApp messaging infrastructure handling millions of monthly events. - Developed SaaS products used by thousands of daily users.

  • Founding Engineer at Gama Academy
    Mar 2016 - Feb 2018 · 2 yrs

    - Developed full-stack platforms for training and talent acquisition using Node.js, React, and Rails. - Created educational programs and courses to help developers get hired, including the Gama XP program in São Paulo, BH, and Florianópolis (+80% placement rate, 300+ developers in 2 years). - Built recruiting and onboarding systems for companies like Accenture and Avanade.