Your Challenge:

We are looking for a highly skilled Tech Lead – Frontend with strong expertise in React Native and modern frontend technologies. This role is ideal for someone who thrives on solving complex performance challenges, writing high-quality code, and guiding a small team while remaining hands-on with development.

This position requires 80% coding and 20% leadership/mentorship, ensuring both technical excellence and effective collaboration across the team.

Key Responsibilities:

Technical (80%)

• Architect, design, and implement scalable, performant frontend solutions using React Native, React.js, Next JS and related technologies.

• Diagnose and resolve performance bottlenecks (JS thread blocking, memory leaks, rendering optimizations, network performance, bundle size).

• Ensure code quality via best practices, automated testing, CI/CD integration, and code reviews.

• Collaborate closely with backend, QA, and product teams to deliver seamless mobile and web experiences.
• Stay updated with emerging frontend trends, frameworks, and tooling.

Leadership (20%)

• Provide technical mentorship to developers, fostering a culture of learning and excellence.

• Lead by example with hands-on coding, while setting coding standards and practices.
• Collaborate with Product Managers, Designers, and QA to align on delivery timelines and priorities.
• Support sprint planning, estimations, and ensure smooth delivery.

• Drive initiatives around frontend performance monitoring, observability, and proactive improvements.

Requirements

• 7–12 years of experience in frontend development, with at least 4+ years in React Native.

• Strong knowledge of JavaScript (ES6+), TypeScript, React.js, Redux / Recoil / Context API.

• Proven expertise in performance optimization for React Native apps (cold start, FPS, memory usage, bundle size, network performance).

• Solid understanding of mobile CI/CD pipelines (App Center, Bitrise, Fastlane, GitHub/GitLab CI).

• Hands-on experience with frontend performance monitoring tools (Flipper, Firebase Performance, Sentry, New Relic, etc.).

• Strong debugging skills and ability to work across Android and iOS ecosystems.

• Familiarity with native bridges (Java/Kotlin, Objective-C/Swift) for React Native integrations.

• Good understanding of frontend security practices and accessibility.

• Excellent communication, problem-solving, and collaboration skills.
• Fluent in Thai, both written and spoken.
• Prior experience leading small teams or mentoring developers.

Nice-to-Have

• Experience with micro-frontends, modularization, or mono-repo setups.

• Familiarity with performance/load testing tools (JMeter, k6, Locust) for frontend APIs.

• Contributions to open-source projects or strong personal GitHub portfolio