Apin Group is a leading cryptocurrency company focused on delivering innovative solutions at the forefront of crypto market technology. We are seamlessly integrated with over 10 centralized and decentralized cryptocurrency exchanges and serve a rapidly growing customer base of over 1,000 clients. Our commitment to developing cutting-edge technology ensures that we remain at the cutting edge of industry innovation.

Province

Tehran

Gender

Male, Female

Work Experience

Experience Required

Job Type

Remote

Salary

30 up to 50 Million Toman

Requirements

We are seeking a Senior Frontend Developer with extensive expertise in React 19, Tailwind CSS 4, Web Workers, RxJS, and WebSockets to join our engineering team. You will play a critical role in designing and building responsive, high-performance user interfaces for our crypto and financial market platforms. The ideal candidate is passionate about crafting seamless user experiences, leveraging real-time data, and optimizing frontend performance for demanding financial applications.
Design and develop intuitive, responsive, and high-performance user interfaces using React 19 and Tailwind CSS 4.
Implement real-time market data visualizations and trading interfaces using WebSockets for low-latency communication.
Utilize RxJS for managing complex asynchronous data streams and event-driven architectures.
Leverage Web Workers to optimize frontend performance and ensure smooth user experiences under heavy computational loads.
Collaborate closely with backend engineers to integrate APIs and ensure seamless data flow between frontend and backend systems.
Optimize frontend applications for speed, scalability, and cross-browser compatibility.
Ensure UI/UX designs are implemented with precision, adhering to best practices for accessibility and responsiveness.
Enhance observability and debugging capabilities using tools like Sentry, LogRocket, or similar.
Work with product managers and designers to translate requirements into technical specifications and deliver user-focused solutions.
Maintain and improve code quality through unit testing, code reviews, and adherence to modern frontend development standards.
Stay updated on emerging frontend technologies and advocate for their adoption where applicable.
5+ years of frontend development experience, with a strong focus on React and modern JavaScript/TypeScript.
Proven expertise in React 19, including hooks, context, and performance optimization techniques.
Extensive experience with Tailwind CSS 4 for building responsive and maintainable UI designs.
Deep understanding of WebSockets for real-time communication in financial or trading applications.
Strong proficiency with RxJS for handling complex asynchronous data flows and reactive programming.
Experience with Web Workers for offloading computationally intensive tasks from the main thread.
Familiarity with financial markets, crypto exchanges, and trading systems, with an ability to translate market data into user-friendly interfaces.
Solid understanding of RESTful APIs, and integration with backend services.
High proficiency in English communication (both written and spoken) is essential.
Ability to write clean, modular, and maintainable code with a focus on scalability.
Strong problem-solving skills and a disciplined approach to tackling complex technical challenges.
Experience using AI tools to enhance productivity and streamline frontend workflows.
Preferred Qualifications
Experience building frontend applications for high-frequency trading (HFT) or real-time financial systems.
Familiarity with data visualization libraries such as D3.js, Charts for rendering market data.
Knowledge of state management libraries like Redux, Zustand.
Contributions to open-source projects related to React, JavaScript, or frontend development.