Front-End Developer

Number Group L.L.C. is seeking a Mid to Senior Front-End Developer to join our dynamic team. This role will involve working across multiple portfolio companies within the emerging technologies and blockchain space. The ideal candidate will have a deep understanding of modern web development practices, including extensive experience with JavaScript frameworks, progressive web applications, and responsive design. As part of our innovative team, you will play a crucial role in developing and enhancing user interfaces that are not only visually appealing but also highly functional and user-friendly. Your work will directly impact our mission to provide equal access to decentralized finance through cutting-edge digital solutions. Willing to start on a part-time / full-time contract basis and move into full-time salaried position.  Key Responsibilities• Develop and maintain web applications using HTML, CSS, JS + React • Working with the UX/UI design team to ensure accurate experience for the final product • Implement responsive designs for desktop and mobile platforms, ensuring a seamless user experience • Use best practices for optimizing performance, SEO, and accessibility • Deploy applications and manage DNS and cloud services for multiple domains • Integrate Web3 technologies, such as wallet connection and contract interaction, to build secure identity and payment features and services • Contribute to a collaborative team environment, moving fluidly between multiple active projects and interfacing with clients and external partners in a professional manner Basic Requirements• Proficiency in HTML, CSS, JavaScript, and React • Familiarity with collaborative design apps (e.g. Figma) and experience converting wireframes to responsive React components for both mobile and desktop • Experience with React frameworks, such as NextJS and Vite, as well as state management techniques and libraries (e.g. React Context, Zustand/Redux/Jotai/etc.) • Familiarity with Web3 wallet management and interfacing with smart contracts (wagmi + viem + connectkit preferred) • Understanding of Git workflows for navigating pull requests, code reviews, and deployment checks/actions • Clear communication, both written (e.g. Slack, Telegram, pull requests, documentation, etc.) and verbal (e.g. video conferencing) Preferred Qualifications• Experience in the crypto/DeFi space is a significant plus • Experience with styled-components • Experience with unit/integration testing best practices and libraries (e.g. Jest, Vitest) • Experience with creating Progressive Web Apps • Experience with WebXR technologies (e.g. WebGL, ThreeJS and the @react-three suite) • Familiarity with authentication integrations/services (e.g. Google Identity, OAuth, etc.) • Familiarity with deployment and DNS management platforms like Vercel, Cloudflare, Godaddy, etc. • Familiarity with cloud computing infrastructure (e.g. AWS, GCP, Digital Ocean, etc.) • Skills in asset creation and editing tools (e.g. Photoshop, Illustrator, Inkscape, etc.) • Interest in game design and mechanics