We are looking for a Senior Frontend Engineer (React.js) to design, implement, and optimize complex, scalable user interfaces for high-performance web applications. You will be responsible for ensuring clean architecture, robust performance, and consistent user experience through strong technical expertise, disciplined testing practices, and close collaboration with cross-functional teams.
What You’ll Do
- Design, develop, and maintain high-quality, scalable user interfaces using React 19+ - Leverage React 19 features such as the React Compiler, hooks, and advanced component lifecycle patterns - Implement efficient state management using Zustand (client) and TanStack Query (server) - Utilize Context API for dependency injection and route context - Apply event-driven architecture for decoupled component communication - Build responsive and accessible interfaces using Tailwind CSS 4+ and Shadcn component system - Manage forms with React Hook Form and schema validation using Zod - Ensure type safety and consistency using TypeScript and Zod integration - Write and maintain unit tests with Vitest and React Testing Library - Conduct comprehensive E2E testing with Playwright - Optimize frontend performance and maintain codebase health through refactoring and profiling - Follow strict naming conventions and organized folder structures to maintain clarity and scalability - Collaborate closely with product managers, designers, and backend engineers in an Agile environment - Stay up to date with the evolving React ecosystem, including TanStack Router and other modern tools
What You’ll Bring
Technical Skills
- Deep expertise in React 19+, including hooks, component lifecycle, React Compiler, and advanced patterns - Strong proficiency in ES6+ JavaScript and TypeScript, ensuring robust, type-safe code - Expert knowledge of Zustand and TanStack Query for client- and server-state management - Proficiency with Context API, event-driven architecture, and component composition (including compound components) - Solid understanding of responsive design and implementation with Tailwind CSS 4+ - Experience with Shadcn component system and modular UI architecture - Proficiency in React Hook Form and Zod for schema validation and type safety - Familiarity with bun package manager - Hands-on experience with Vitest and Playwright for full testing coverage - Ability to produce well-structured, maintainable, and scalable code aligned with modern best practices
Soft Skills
- Strong problem-solving and critical thinking, with ability to debug complex issues and identify root causes - Exceptional attention to detail, maintaining high-quality standards and anticipating edge cases - Clear and structured communication skills for collaboration with both technical and non-technical teammates - Strong sense of ownership and accountability, following through on deliverables end-to-end - Adaptable and continuously learning, embracing new technologies like React Compiler and TanStack Router - Proactive in identifying improvements, refactoring opportunities, and optimization needs - Excellent time management and prioritization skills in a fast-paced environment - Commitment to knowledge sharing, mentoring teammates, and writing clear technical documentation
Preferred Skills
- Experience with TanStack Router or similar modern routing systems - Deep understanding of event-driven communication and decoupled frontend architectures - Familiarity with design systems and UI scalability best practices - Knowledge of SSR frameworks or static site generation tools - Experience with CI/CD pipelines and Agile/Scrum development environments - Contributions to open-source projects or internal component libraries - Bachelor’s degree in Computer Science, Software Engineering, or a related technical field (or equivalent practical experience)
Benefits
- Being a part of a global startup with hyper-growth. - Exceptional, innovative and dynamic work environment - Full transparency and open employee communication - Tremendous growth & career advancement opportunities - Tuition reimbursement - Paid time off
هلی تکنولوژی یک شرکت هلدینگ ترکیبی است که بر این باور است که درخشش جمعی، موتوری برای نوآوری است. این شرکت در سال ۲۰۲۰ در استانبول تأسیس شد و با ایجاد، مدیریت و حمایت از مجموعهای متنوع از کسبوکارها در صنایع مختلف، به رشد و پیشرفت آنها کمک میکند.
ما مسیرهایی را روشن میکنیم تا ایدهها شکوفا شوند و کسبوکارها به پتانسیل کامل خود دست یابند. از زمان آغاز رسمی فعالیت، به شبکهای پویا از ذهنهای خلاق تبدیل شدهایم که راهکارهایی تأثیرگذار ارائه میدهند و الهامبخش پیشرفت هستند.