Osmar Petry

Luxembourgish-Brazilian Senior Frontend/Full-Stack Engineer

Senior Frontend/Full-Stack Engineer with 9+ years of experience building and scaling web and mobile applications across EU and US distributed teams. Strong background in React/Next.js, TypeScript, Node.js, and cloud platforms, with a focus on performance, maintainable architectures, testing culture, and developer experience. Collaboration, Leadership, Stakeholder management, Ownership, Communication.

Contact Me View CV Articles Schedule Call GitHub LinkedIn

Work History

Senior Frontend Engineer — Cyberr S.A.

Nov 2025–Present · Luxembourg (on-site)

  • Developed end-to-end calendar and meeting scheduling feature (RVP) with calendar views, meeting flows (request, accept, propose, decline), and dashboard widgets for cybersecurity recruitment platform
  • Built features using Next.js, React, HeroUI, React Hook Form, and Zod
  • Contributed to backend development using Node.js, TypeScript, and Drizzle ORM
  • Implemented Microsoft Graph integration for calendar synchronization with minimal API surface
  • Integrated Daily.co for video meeting scheduling and Veriff for ID verification
  • Created Storybook documentation and unit tests for critical flows

Senior Software Engineer — Attend

May 2023–Nov 2025 · USA (remote)

  • Led administration dashboard unifying three products (Pass, Flow, Flex), serving 50K+ concurrent users
  • Built and scaled features using React, Next.js, TypeScript, Redux, and AWS
  • Implemented payment workflows and gift-card integrations for Flex platform using Node.js and Stripe APIs
  • Improved data synchronization and UI consistency across products, reducing user-facing bugs by 40%

Senior Software Engineer — Consulting

Feb 2023–Aug 2023 · USA (remote)

  • Designed and shipped React Native health application with lab integrations and patient–doctor chat functionality for iOS and Android
  • Built white-label city and event applications from single modular codebase, enabling rapid deployment to 10+ clients
  • Set up CI/CD pipelines and Firebase-based infrastructure for automated testing and deployment

Senior Software Developer — X-Team

Mar 2021–Feb 2023 · USA (remote)

  • Enhanced GraphQL filters and scheduling for Beachbody (BODi), a large-scale streaming platform serving 5M+ users
  • Automated reporting tables and stabilized CI/CD pipelines at Lemonlight, reducing deployment time by 35%
  • Improved back-office invoicing systems and internal portals at KMF/XHQ using Node.js and Firebase
  • Shipped browser-based game and CLI audio tools with cloud backup routines for X-Games

Earlier Experience

2015–2020 · Frontend and software engineering roles at Luizalabs, Zup Innovation, NG Informática, CoBlue, TOTVS, and Envolve Labs

Education

Postgraduate — Modern Education, PUCRS (2022–2023) B.Sc. Information Systems — Católica SC (2015–2018) Network Technician — SENAI/SC (2013–2014)