React Developer

Aggregate Business Solution Ltd

Engineering & Technology

We are looking for a talented and detail oriented React Frontend Developer to join our team. You will be responsible for building responsive, interactive, and scalable user interfaces using React. The ideal candidate should have a strong grasp of modern Typescript and JavaScript, component-based architecture, state management, and UI/UX best practices. If you're passionate about clean code, performance, and building seamless user experiences, we’d love to hear from you.

Coding Challenge

Design and build a responsive React web application that allows users to generate, validate, and manage NUBAN account numbers. The project should emphasize clean architecture, advanced state management using Redux Toolkit, and a polished user experience.

NUBAN Generation State

• Get new generated NUBAN account numbers from a Mock API service of your choice.
• Store newly generated NUBANs, associated metadata (bank code, serial number, check digit, timestamps)
• Handle loading, success, and error states

Validation History State

Keep a list of all validated NUBANs and their validation status (valid/invalid, reason)

Optional: allow user to clear or export this history

Filter & Sorting Controls

• Filter by bank code
• Sort by creation time or NUBAN number
• Persist UI preferences in Redux state

Global UI State

• Track global loading spinners, error modals, and success alerts using a dedicated uiSlice
• Use these states to provide consistent UX feedback across the app

Optional Advanced Use

• Persist state to localStorage using middleware
Use Redux async thunks for API integration (e.g., generateNuban, validateNuban)

Submission Instruction

Please send the following to projects@aggregatesolution.net:

• A link to your GitHub repo or ZIP file
A short README explaining how to run your application and any assumptions you made

We review submissions on a rolling basis, so early applications are encouraged!

Key Responsibilities For Job Role:

• Develop and maintain dynamic, responsive web applications using React
• Convert UI/UX designs into interactive, reusable components
• Integrate with backend REST APIs and handle asynchronous data flows
• Maintain component libraries and shared UI resources
• Write clean, maintainable, and scalable code with appropriate documentation
• Optimize performance for maximum speed and scalability across browsers/devices
• Work collaboratively with designers, backend developers, QA engineers, and product managers
• Participate in code reviews and contribute to design discussions
Ensure application meets accessibility and security standards

Required Skills and Qualifications For Job Role

• Experience developing web applications with React frontend apps
• Strong proficiency in Typescript, JavaScript (ES6+), HTML5, and CSS3
• Experience with React Hooks, React Router, and functional components
• Familiarity with form libraries (e.g., Formik, React Hook Form) and validation libraries (e.g., Yup)
• Solid understanding of RESTful APIs and integration using Axios or Fetch
• Experience with state management using Context API or Redux
• Knowledge of responsive design, browser compatibility, and modern CSS frameworks (Tailwind, Bootstrap, etc.)
• Familiarity with tools like Webpack, Vite, or Create React App
Version control with Git and collaboration through GitHub or GitLab

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