Sr. Frontend Engineer (ReactJS + GraphQL)

• Years of production-level experience building complex, interactive web applications using React, TypeScript, and modern browser APIs.
• Deep hands-on experience with scalable data caching, mutation, and synchronization using React Query and GraphQL.
• Strong ability to build custom UI components and layouts without relying on bloated pre-built UI packages.
• Proven experience building, isolating, and documenting component systems inside Storybook.
• Comprehensive understanding of React internals and browser rendering pipelines.
• Strong professional English communication skills.
• Ability to work within a schedule bridging Eastern Europe and EST business hours.

Nice to Have:

• Proficiency with web animation libraries such as Framer Motion, GSAP, Motion One, or raw CSS/Canvas animations.
• Experience with multi-framework architecture including Vue.js and React.
• Familiarity with backend ecosystems like Elixir or full-stack web performance considerations.
• Experience in high-velocity startup environments, gaming, fintech, or digital entertainment platforms.

Core Frontend Architecture:

• Architect, scale, and maintain high-performance React and TypeScript applications from the ground up, avoiding unnecessary third-party package dependencies.

Performance & Rendering Optimization:

• Identify and eliminate rendering bottlenecks, memory leaks, and layout thrashing.
• Optimize for code-splitting, lazy loading, and sub-millisecond interaction states.

Data Layer Management:

• Build and optimize efficient frontend data flows and caching strategies using React Query and GraphQL.

Custom Component Engineering:

• Design and maintain a proprietary, highly reusable component library from scratch.
• Fully document and stress-test components inside Storybook.

High-Fidelity Interaction & Animation:

• Collaborate with product design to implement fluid micro-interactions and complex web animations.

Technical Leadership & Code Quality:

• Set standards for frontend engineering excellence through code reviews, architectural documentation, and mentorship of junior/mid-level engineers.

Only candidates able to work within a schedule bridging Eastern Europe and EST business hours.