Lucas Antonio Ramos Sartori
Senior Software Engineer · Ruby on Rails · Remote · LATAM · Brazil
Senior Software Engineer with nearly 9 years of experience, focused on building, evolving, and scaling Ruby on Rails applications for U.S.-based and international companies. Strong background in legacy systems, multi-tenant architectures, APIs, AI-driven features, and long-term maintainability.
Professional Experience
Senior Backend Ruby Developer
Ballast Lane Applications · Remote · USA · Sep 2024 – Present
- Working on Tripleseat, a large-scale event and restaurant management platform
- Developing new features, improving performance, and maintaining complex integrations
- Applied prompt engineering and generative AI techniques to build reliable workflows that automated tasks, improved information retrieval, and accelerated development processes.
- Contributing to Inspect Point, a 10+ year multi-tenant legacy system
- Designing REST APIs, addressing technical debt, and improving system reliability
Senior Software Engineer
FullStack Labs (NoFraud) · Remote · USA · Nov 2021 – Mar 2024
- Worked on a high-volume e-commerce fraud detection platform
- Increased test coverage from 2% to over 40%
- Rebuilt merchant dashboards and reporting systems
- Rebuilt customer document upload workflows
- Improved security by integrating Brakeman and fixing vulnerabilities
Senior Software Engineer / Tech Lead
Grupo EUAX · Remote · Brazil · Jun 2021 – Nov 2021
- Led development of Twygo, a 10+ year online education platform
- Acted as Ruby on Rails specialist and technical reference
- Led a team of 4 developers
- Balanced feature delivery with refactoring and system stability
Senior Software Engineer (Ruby on Rails)
Grupo EUAX · Remote · Brazil · Dec 2020 – Jun 2021
- Developed and maintained features for the Twygo platform
- Assisted the team with product and technical questions
- Worked extensively with legacy codebases
Fullstack Developer
Lets · Hybrid · Brazil · Apr 2019 – Nov 2020
- Worked on multiple projects using Angular, Vue.js, Rails, and Node.js
- Developed SPAs and backend APIs
- Participated in mobile projects using Flutter, NativeScript, and Kotlin
Android Developer
Stape Music · Remote · Sep 2018 – Apr 2019
- Developed new features and fixed bugs for a music streaming app
- App fully developed in Kotlin
- Supported monetization workflows for musicians
Fullstack Developer
Teorema Sistemas · Guarapuava · Brazil · Jun 2017 – Sep 2018
- Worked on an ERP system using Spring Boot, Angular, and Kotlin
- Designed and implemented REST APIs
- Rewrote backend from JEE to Spring Boot and Kotlin
- Reduced offline sync time from ~4 hours to 10–15 minutes
Education
Specialization in Mobile Web Application Development
UniGuairacá Centro Universitário · 2019 – 2021
Bachelor in Internet Systems Technology
Federal University of Technology · 2014 – 2019
Side Projects
uButeco
Open-source platform to manage restaurant orders, inventory, and kitchen panels, featuring real-time updates, role-based access, and customizable UI.
Ruby on Rails · PostgreSQL · Angular · Angular Material · NgRX · JWT · REST APIs
Recommendations
“Lucas is a strong developer, hardworking, and a great collaborator. He consistently goes the extra mile to deliver quality work.”
“Lucas is not only a competent Ruby developer, but also brings positivity and energy to the team. A pleasure to work with.”
“Extremely committed, he always gives his best and has a great desire to learn. He's the kind of person who's truly dedicated; we can always count on him for anything.”