frontend developer for Zerion Wallet

Zerion builds Zerion Wallet, a crypto wallet, and Zerion API, which serves crypto and fintech brands. Zerion Wallet has over 1.7 million active funded wallets and has processed 27.6 million transactions.

• Own complex product features end-to-end, from understanding problems and shaping solutions through implementation, launch, and iteration;
• Work with the product team to shape what gets built, challenge assumptions, and turn ambiguous problems into product experiences;
• Build polished, responsive product experiences using React and TypeScript;
• Prototype and iterate on interactions using code, design tools, and AI;
• Refine interface interactions, motion, responsiveness, loading states, transitions, and microinteractions;
• Build and evolve reusable frontend components and the design system;
• Identify opportunities to improve the product experience and take ownership of those improvements;
• Maintain high standards for performance, accessibility, reliability, and frontend engineering quality.

• 5+ Years of experience building high-quality, customer-facing web products;
• Excellent knowledge of React, TypeScript, modern CSS, and browser technologies;
• Experience owning and shipping complex product features end-to-end;
• Strong product and UX judgment, with the ability to identify and improve poor interactions;
• Exceptional attention to detail and a commitment to polished, responsive interfaces;
• Experience building sophisticated animations and interactive UI;
• Strong understanding of modern frontend engineering practices and when to apply them;
• Ability to turn ambiguous product problems into concrete solutions;
• Strong ownership mindset and responsibility for outcomes;
• Interest in contributing to product evolution beyond implementation;
• Comfortable working in a fast-paced startup environment and handling multiple problems in parallel;
• Clear, proactive communication in a distributed team;
• Strong command of HTML, CSS, browser APIs, and modern frontend architecture;
• Experience building responsive, high-performance web applications, complex UI transitions, reusable component systems, and frontend abstractions;
• Strong understanding of frontend performance, accessibility, and cross-browser behavior;
• AI-native workflow is your default for product exploration, implementation, debugging, and iteration;
• Nice to have: experience building or evolving design systems and component libraries, strong Figma skills, experience with highly interactive consumer applications where performance and perceived performance matter, Browser Extension development, hands-on Web3 experience with wallets, dApps, blockchain interactions, or DeFi, startup experience emphasizing trust and autonomy, time zones close to Europe, curiosity and willingness to challenge existing solutions.

• Competitive salary, medical insurance, coworking membership, and additional benefits;
• Unlimited days off and a flexible work schedule;
• Software and equipment for working from home;
• Stock options;
• Travel to industry events and an annual team offsite;
• Zerion is a fully remote, distributed team with members worldwide, using asynchronous collaboration;
• The application must include the word WATERMELON in the answer to the application question.