Jobs in Donostia, Spanien

Helping Web3 Startups Hire Top Golang & Rust Engineers | Tech Recruiter (US | Europe)

Join a world-class team of technical leaders (CTO, CPO, CISO) and seasoned engineers (Software, Security, Platform) building the next-generation blockchain wallet infrastructure that will power the future of finance.

We’re looking for a Senior Frontend Engineer with deep experience in modern web and mobile development, a solid grasp of UX design principles, and a track record of building high-quality fintech or crypto applications. This role is perfect for someone who thrives in fast-paced environments, has a strong eye for detail, and enjoys pushing the boundaries of what’s possible in user experience and security.

What You’ll Do

• Collaborate with the team to shape the product vision, prioritize the roadmap, and ensure quality and delivery timelines.
• Lead the development of responsive and secure UI components for our Wallet-as-a-Service platform (web and mobile).
• Build and maintain frontend SDKs to enable seamless client integrations.
• Implement passkey-based authentication using WebAuthn and security best practices.
• Translate fintech and banking UX / UI principles into intuitive crypto wallet experiences.
• Rapidly prototype ideas and deliver pixel-perfect, production-grade interfaces.
• Ensure high performance, reliability, and accessibility across platforms.
• Write clean, maintainable code and comprehensive documentation.
• Contribute to a strong engineering culture through code reviews and technical collaboration.
• Continuously explore new tools and technologies to improve frontend development workflows.

What We’re Looking For

• 6+ years of experience in frontend development.
• Strong proficiency in TypeScript (or similar languages).
• Expertise in building UIs with React, Angular, Flutter, or Vue.js.
• Experience with WebAuthn and passkey-based authentication systems.
• Proven ability to build and maintain frontend SDKs.
• Familiarity with fintech / crypto UI best practices, error handling, real-time updates, and secure audit logging.
• Solid understanding of cybersecurity principles and secure-by-design development.
• Proficient in Git, responsive design, and frontend testing frameworks.
• Passion for user-focused design and delivering frictionless financial experiences.
• Knowledge of WCAG accessibility standards and commitment to inclusive design.
• Excellent communication skills and a calm, solution-oriented mindset.
• Entrepreneurial spirit and ability to operate in dynamic, resource-constrained environments.
• Deep understanding of crypto wallets is a big plus.

What You’ll Get

• Equity : 300–600 stock options (0.1–0.2%).
• Fully remote position (France / EU-based preferred).
• Option to work from a physical office if desired.
• MacBook Pro and all the gear you need to do your best work.

Interview Process

• Intro Call – Meet the Co-CEO (30 min)
• Behavioral Interview – Includes personality & cognitive assessments
• Technical Interview – Deep dive with the CTO (30 min)
• Take-Home Assignment – Showcase your skills in a practical challenge
• Panel Interview – Final interview with our leadership team (90 min)

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