Senior Frontend Engineer

Location: Lisbon; Belgrade Workplace: OnSite Aghanim is an integrated commerce, liveops automation, community engagement, and payments platform for video games.   Mobile games have traditionally depended on app stores for distribution, payments, and player relationships. We believe there is a better way. Aghanim helps game studios build direct relationships with players, sell directly, and build their future on their own terms. Today, more than 100 games worldwide are already building this future with Aghanim.   Our team brings together people across Los Angeles, New York, Seoul, Beijing, London, Lisbon, Belgrade and other locations around the globe, with deep expertise in gaming, fintech and technology. We move quickly, keep communication direct, and focus on getting things done. We believe the best people thrive when they have autonomy, ownership, and a stake in the company's success. [https://app.ashbyhq.com/api/images/user-content/4f457f07-466b-477b-b552-fbbabd850111/2de3a7cd-8843-41a9-8bbe-ceb897a42c4a/Logo%20(horizontal).svg] We’re looking for a Senior Frontend Engineer who cares deeply about performance, architecture, and building systems that scale. You will work across two complementary product areas: - A high-load, mobile-first web platform where SSR, rendering strategy, and Core Web Vitals are critical - Internal builder, CMS, and analytics products that require complex editors, forms, and state-heavy interfaces This role combines frontend platform engineering with advanced application development, requiring strong ownership of architecture, performance, and user experience. KEY RESPONSIBILITIES - Build and evolve high-performance web applications across game hubs, CMS, and analytics products - Design scalable frontend architecture, reusable UI systems, and developer-friendly foundations - Optimize rendering, caching, and application performance for high-load environments - Develop complex editor experiences, forms, dashboards, and state-heavy user interfaces - Ensure code quality through testing, observability, and engineering best practices REQUIRED QUALIFICATIONS - 5+ years of frontend development experience - Strong React expertise and modern frontend architecture practices - Production experience with Next.js, SSR, and React Server Components - Experience building complex SPA applications, including editors, dashboards, CMS, or similar state-heavy products - Strong performance optimization skills (Core Web Vitals, profiling, caching, rendering strategies, bundle optimization) - Experience with TanStack ecosystem (React Query and related tools) - Experience with Tailwind CSS and Vite - Experience designing reusable UI systems, components, and frontend architecture - Strong testing culture and maintainable engineering practices PREFERRED QUALIFICATIONS - Experience with schema-driven forms (Zod or similar) - Experience with BaseUI, Radix, or similar component systems - Experience with Bun - Background in gaming, entertainment, or high-traffic consumer products WHY JOIN US - World-class team – work alongside experienced professionals from around the globe who have built products used by millions of players - High growth, high impact – be part of a fast-growing company where ideas turn into products and reach customers in days, not months - Autonomy and ownership – we trust people to make decisions, take initiative, and drive results - Modern tools and technology – use AI, automation, and modern tools as part of your everyday work - Equity – participate in the company's growth and long-term success