Front-End Team Lead (Ohayu at Genesis)

Ohayu is a fast-scaling B2C mobile and web app that enables travelers to purchase eSIM data plans globally. We are seeking a Front-End Team Lead to take ownership of our frontend architecture, leading the migration from Preact SPA to Next.js SSR while mentoring other developers.

• Take full ownership of frontend architecture and scalability, designing a target architecture to migrate from Preact SPA to Next.js SSR
• Optimize website performance ensuring the fastest load times for users around the world
• Design and implement a robust caching strategy to support global performance at scale
• Add multiple languages to the platform
• Collaborate closely with the design team to translate Figma designs into high-quality, responsive user interfaces and A/B tests
• Improve observability and error handling across the frontend stack
• Refine and implement proper CI/CD pipelines to streamline development and deployment workflow
• Mentor, support and lead other frontend developers, conducting code reviews and sharing knowledge

• 7+ years of JavaScript experience
• 4+ years of React experience
• 4+ years of Next.js experience (ideally with hands-on work with App Router or Pages Router)
• 3+ years of TypeScript experience
• Proven experience with migration projects, ideally having led or played a key role in SPA to SSR migrations
• Experience deploying and managing applications on Vercel
• Solid knowledge of crash analysis tools and production monitoring
• Experience designing and implementing caching strategies for high-traffic, globally distributed applications
• Familiarity with i18n solutions and adding multi-language support to web platforms
• Experience building and maintaining CI/CD pipelines
• Leadership, mentoring and knowledge-sharing skills
• At least intermediate English level

Benefits: Health insurance, 20 paid vacation days, annual performance review with clear salary progression

Work Format: Possibility to work fully remotely or from offices in Warsaw, Kyiv or Lviv