Lucas Hauptmann Pereira
Senior Software Engineer · Brazil, São Paulo, Sao Paulo
Professional Snapshot
Senior Software Engineer with 8+ years of experience building scalable, high-quality software for international clients. His core expertise lies in Ruby on Rails, React.js, and TypeScript, with a strong focus on API design, system performance, and maintainable architecture. He combines strong software engineering fundamentals with AI-native development practices, leveraging tools such as Claude Code and Windsurf alongside Spec-Driven Development, AI agents, and harness engineering to accelerate delivery, improve code quality, and streamline the development lifecycle. He is committed to building secure, reliable, and user-centric solutions while continuously exploring better ways to integrate AI into modern software engineering.
Preferred roles
Senior Ruby on Rails Engineer
Work preferences
Remote
Availability
Available Immedialy
Typical response
Usually in 24 hours
Relocation
Willing to relocate
Languages
English(fluent), Portuguese(native)
Professional Links
Details
Gender
Male
Age range
35-44
luca••••••••••••@•••••.com
Phone
•••••••••4440
Address
Rua Do•••••••••••••••••••••••••
Experience
Senior Software Engineer · SwareCo
Dec 2024 – Present
- Delivered an embedded call-center workflow using Rails, WebRTC, RingCentral, and Zoho CRM; built in-app call controls, backend APIs, webhooks, and CRM synchronization to let agents manage calls without switching applications.
- Stabilized asynchronous telephony and CRM integrations by resolving call-state inconsistencies, event synchronization issues, retries, and cross-service errors.
- Built multi-template invoice management end-to-end with Ruby on Rails and React; contributed printable QR code watch tags and improved CSV-based bulk inventory imports for Elefta.
- Improved search relevance and responsiveness using PostgreSQL and pg_search, and enhanced interactive UI experiences with Hotwire (Turbo and Stimulus) for Showrilly.
- Owned feature delivery, production troubleshooting, and Heroku deployments; used Claude Code, PRDs, Spec Kit, and specialized agent skills in a specification-driven development workflow.
Education
Bachalor in Computer Science · Federal University of Sao Carlos, Brazil
2013 – 2018
Skills
About
Senior Software Engineer with 8+ years of experience building scalable, high-quality software for international clients. His core expertise lies in Ruby on Rails, React.js, and Typ...
Senior Software Engineer with 8+ years of experience building scalable, high-quality software for international clients. His core expertise lies in Ruby on Rails, React.js, and TypeScript, with a strong focus on API design, system performance, and maintainable architecture. He combines strong software engineering fundamentals with AI-native development practices, leveraging tools such as Claude Code and Windsurf alongside Spec-Driven Development, AI agents, and harness engineering to accelerate delivery, improve code quality, and streamline the development lifecycle. He is committed to building secure, reliable, and user-centric solutions while continuously exploring better ways to integrate AI into modern software engineering.
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