Senior Frontend Engineer

Dfns • Full-time • Paris • €100k - €120k / year • 1w ago

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.

Preferred 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.

Recruitment Process

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.

Additional Information

Contract Type:Full-Time
Location:Paris
Education Level:Bachelor's Degree
Experience:> 5 years
Possible full remote
Salary:between 100000€ and 120000€ / year

About

Dfns is the leading Wallets-as-a-Service (WaaS) platform that helps fintechs, institutions, and enterprises worldwide simplify digital asset management and securely bring users into crypto. Our API-first approach has made Dfns the most popular developer platform to configure, automate and orchestrate digital asset applications and operations at scale. Powered by advanced security and cryptography, Dfns serves as the reliable multichain wallet backend for top players in banking, payments, trading, lending, tokenization and other financial services.

Trusted by clients like ABN AMRO, Fidelity, Standard Chartered, Stripe, and more than 100 fintechs, Dfns has created over 10 million wallets and secures $1 billion in monthly transactions with a perfect record: no hacks, no lost keys. Incubated by Techstars and Station F, Dfns has raised $28M from investors like Further Ventures, White Star Capital, Motive Partners, Bpifrance, Susquehanna, Coinbase, Semantic, Wintermute, Figment, Motier, Hashed, 6MV, and others.