Join a team of exceptional leaders (CTO, CPO, CISO) and skilled experts (Software, Security, Platform Engineers) to build the leading blockchain wallet infrastructure for the next financial era. We are looking for a Senior Frontend Engineer with expertise in modern web and mobile development (iOS/Android), a strong grasp of UX design principles, and proven experience building fintech or crypto applications. The ideal candidate has a sharp eye for detail, excels under pressure, and thrives in dynamic, resource-limited environments. As a Senior Frontend Engineer, you will design and implement high-quality, user-facing software solutions that deliver frictionless financial experiences. Your goal is to deliver secure, high-performing interfaces that meet quality standards and upgrade user experience.

Responsibilities

• Share the team’s vision, set priorities on the product roadmap, and ensure deadlines and production quality are met.

• Bring innovative ideas to solve technical challenges.

• Solve front-end challenges with creative and effective solutions.

• Contribute to UI (web/mobile) development for the Wallets-as-a-Service platform.

• Incorporate fintech and banking UX/UI best practices into crypto wallets.

• Ensure secure, user-friendly passkey-based authentication experiences.

• Develop and maintain SDKs for smooth client integration.

• Implement responsive designs for optimal performance across all interfaces.

• Apply and stay updated on security best practices for frontend components.

• Review product code to ensure it meets specifications and requirements.

• Maintain clear, concise technical documentation.

• Address issues quickly and document resolutions.

• Collaborate with teams to enhance software development practices.

• Stay informed on new technologies and suggest improvements.

Requirements

• 6+ years of experience as a Frontend Engineer or similar.

• Skilled in TypeScript (or similar languages).

• Expert in building UIs using React, Angular, Flutter or Vue.js.

• Familiar with WebAuthn and passkey authentication.

• Experienced in developing and maintaining SDKs.

• Strong skills in error handling, debugging, and real-time notifications.

• Knowledgeable in secure audit logging and financial UI best practices.

• Solid understanding of cybersecurity principles.

• Proficient with Git for version control.

• Skilled in creating responsive, mobile-friendly user interfaces.

• Proficient in frontend testing tools and workflows.

• Committed to delivering user-focused designs.

• Knowledge of web accessibility standards (WCAG).

• Capable of rapidly prototyping UI concepts.

• Strong problem-solving and idea advocacy skills.

• Clear communicator and calm under pressure.

• Entrepreneurial mindset with a professional approach.

• Deep understanding of crypto wallets is a big plus.

Process

• Intro call with Co-CEO (30 min).

• Personality and cognitive tests (30 min).

• Interview with CTO (30 min).

• Coding test in a language of your choice.

• Focus interview with hiring panel (90 min).

• Reference calls and background checks.

Terms

• Title: Senior Frontend Engineer

• Salary: €100,000-120,000 per year (full-time work contract).

• Equity: 300-600 stock options (i.e., 0.1-0.2%) vested over 4 years.

• Location: France or EU (fully remote with optional access to office)

• Equipment: MacBook Pro and other work essentials.