We are looking for a Front-End Team Lead to join Ohayu (ohayu.com). We are building the easiest way for travelers to stay online anywhere in the world. We’re a fast-scaling B2C mobile + web app (iOS/Android/Web) that lets people buy eSIM data plans in minutes — cheaper than roaming, no SIM shops, no hassle. Thousands of travelers already use Ohayu worldwide, and we’re just getting started. Our ambition is bigger than eSIM: we’re evolving Ohayu into a full Travel App that makes every journey smoother.
What you’ll do:
This role is for someone who wants real ownership and real product impact. * Take full ownership of the frontend architecture and scalability, designing a target architecture to migrate our 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 our 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 our development and deployment workflow * Mentor, support and lead other frontend developers, conducting code reviews and sharing knowledge
What we’re looking for: * 7+ years of JavaScript experience * 4+ years of React experience * 4+ years of Next.js experience (ideally with hands-on work with Pages Router or App 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; you’ll be guiding two mid+ React developers that have some experience with Next.js (13/14) * At least intermediate English level — all work communication is in English
Why to join us: * Direct product impact: what you ship gets used immediately by real travelers. * Ownership: you’re a builder leading the frontend direction. * Product engineering culture: we care about UX and conversion as much as we care about clean code. * Fast pace, real learning: constant iterations, clear feedback loops, real-world constraints. * Genesis ecosystem: access to strong expertise, resources, and networking. * Benefits: health insurance, 20 paid vacation days, annual performance review with clear salary progression.
Work format: Possibility to work fully remotely or from our offices in Warsaw, Kyiv or Lviv.
