Senior Frontend Engineer | 10+ Years in React, React Native, Next.js, TypeScript & Scalable Applications
Lucas
Frontend Developer
$6,720 – $8,700/mo
About
Senior Frontend Engineer with 10+ years of experience building scalable web and mobile applications used by millions of users worldwide. I specialize in TypeScript, React, React Native, Next.js, and modern frontend architecture, with deep expertise in performance optimization, design systems, accessibility, developer experience, and AI-powered products. Throughout my career, I’ve partnered closely with product, design, and engineering teams to deliver high-quality user experiences.
Industry Experience
Computer Games
SaaS Platforms
E-Commerce
Candidate Information
Availability
Full-Time
Work Arrangement
Remote
English Level
Professional Fluency (B2/C1)
Additional Languages Supported
Portuguese
Roles Qualified For
Work Experience
Frontend Developer
02/2023 - 05/2026www.scope3.com
United States
– Led the modernization of the frontend platform by architecting a scalable frontend ecosystem and cross-team design system used by 20+ engineers across multiple products, enabling faster feature delivery, improved maintainability, and rapid product iteration. Also improved Lighthouse scores to 90+ on the marketing site across performance, accessibility, and SEO metrics.
- Optimized a high-volume analytics report by migrating scatter chart rendering from SVG to Canvas, reducing render time to under 300ms. Improved ClickHouse query performance and reduced API payload size by over 70%, significantly enhancing frontend responsiveness and end-to-end performance.
– Architected a secure authentication infrastructure using WorkOS, enabling OAuth, MCP OAuth, and self-service enterprise SSO onboarding that reduced enterprise customer setup from days to minutes.
– Built a RAG-powered Slack bot that automated Linear ticket creation with enriched engineering context, improving issue quality and developer workflow efficiency.
Frontend Developer
09/2021 - 02/2023www.riotgames.com
United States
– Orchestrated the frontend migration for the SEA region, ensuring zero-downtime for 4M+ concurrent users during high-traffic launch events.
– Built the web-based skin redemption experience for Valorant (25M+ monthly active players), enabling users to securely redeem promotional codes and unlock in-game cosmetic rewards.
– Maintained and contributed to shared web platform repositories at Riot Games, including authentication systems, account flows, and frontend infrastructure used across multiple player-facing experiences.
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