React Js Lead

As a Senior Frontend Developer/Lead you will be a pivotal leader in shaping the user experience of our entire regulated digital asset ecosystem. You will spearhead the development of our sophisticated, data-rich user interfaces, including the unified Admin & Treasury Portal, the institutional Investor Portal, and the partner-facing PaaS Developer Portal.

This role is for a product-minded engineer who is passionate about building complex, high-performance, and visually intuitive applications. You will be a key decision-maker in our frontend architecture, championing a modular **micro-frontend** strategy and working closely with the UX Lead to implement a unified design system. You will translate complex financial workflows into seamless user interactions, mentor other developers, and set the standard for frontend excellence across the organization.

## 2. Key Responsibilities

• **Architect & Lead Frontend Development:**

• Lead the technical design and development of complex frontend applications using React and its ecosystem.

• Drive the implementation of our micro-frontend architecture, ensuring that modules are scalable, independently deployable, and maintainable.

• Take ownership of critical UI components, from real-time settlement dashboards and compliance workflows to custody management consoles.

• **Build Intuitive & Performant User Interfaces:**

• Collaborate closely with Product Managers and UX/UI designers to translate complex requirements and wireframes into high-fidelity, functional user interfaces.

• Ensure applications are highly performant, responsive, and provide an institutional-grade user experience across all devices.

• Implement advanced data visualizations, real-time data streaming (via WebSockets), and complex form-based workflows.

• **Champion Code Quality & Best Practices:**

• Set and enforce high standards for code quality, testing, and performance within the frontend domain.

• Establish a robust testing strategy, including unit, integration, and end-to-end tests using frameworks like Jest and React Testing Library.

• Mentor mid-level and junior developers through constructive code reviews, pair programming, and technical guidance.

• **Collaborate & Integrate:**

• Work closely with backend teams to define and consume RESTful and WebSocket APIs, providing feedback to shape API design for optimal frontend consumption.

• Integrate with various backend services to present a unified and cohesive experience to the end-user.

## 3. Required Qualifications

### **Must-Have:**

• **Professional Experience:** 7+ years of professional frontend development experience, with a strong portfolio of building and shipping complex, data-intensive web applications.

• **React Expertise:** Expert-level knowledge of React, including hooks, context, and the modern React ecosystem.

• **Architectural Leadership:** Proven experience architecting large-scale frontend applications, preferably using a micro-frontend or other modular architecture.

• **State Management:** Deep experience with advanced state management libraries such as Redux (with Redux Toolkit), Zustand, or MobX.

• **Modern JavaScript/TypeScript:** Mastery of modern JavaScript (ES6+) and extensive experience using TypeScript in a production environment.

• **Testing:** A strong commitment to quality with hands-on experience in writing comprehensive tests for React applications (Jest, React Testing Library, Cypress).

• **Mentorship:** A track record of mentoring other developers and elevating the technical skills of the team.

### **Nice-to-Have (Highly Desirable):**

• **Financial/Crypto Domain Experience:** Experience building UIs for FinTech, trading platforms, banking applications, or crypto exchanges.

• **Data Visualization:** Experience with data visualization libraries such as , , or Highcharts to build dashboards and reports.

• **Micro-Frontends:** Direct, hands-on experience implementing a micro-frontend architecture using techniques like module federation.

• **Real-Time Applications:** Experience building applications that handle real-time data using WebSockets or similar technologies.

• **Design Systems:** Experience working with and contributing to a shared design system to ensure UI consistency.