Frontend Engineer

Tabby launched in 2019 and has since raised +$1 billion in equity and debt funding from global and regional investors, and is now valued at $3.3 billion.

Current Focus:

• Auth SDK Platform - building unified JavaScript/TypeScript SDK for 15+ teams

• (strategic initiative)

• Consent Platform integration and migration (270k consents)

• Tabby Rebrand 2.0 (design system and token migration)

• Trusted Device, B2B Auth, and KSA Nafath integration

• BackOffice admin tools and audit systems

• Team Structure: 7 engineers + 1 PM + 1 EM, distributed across 5+ countries.

Key Responsibilities

• Develop and maintain UI screens with a focus on usability, performance, and aesthetics.

• Collaborate with Product Managers and Designers to build intuitive, UX-friendly interfaces.

• Work on Auth SDK Platform - build JavaScript/TypeScript SDK libraries (npm packages) for frontend teams, implement Passkey/WebAuthn integration, crypto operations (Web Crypto API, HSM), anti-fraud mechanisms (JS Challenge, mTLS, device fingerprinting), and unify auth for 15+ teams.

• Contribute to Consent Platform integration- integrate platform widgets (full-screen and embedded), replace native screens, maintain UI/UX flows, and ensure regulatory compliance.

• Work on B2B Auth and Trusted Device - develop enterprise authentication flows, integrate Trusted Device with cryptography, HSM research for PIN security, and device fingerprinting for SAMA compliance.

• Ensure web applications meet non-functional requirements such as performance, scalability, and security.

• Contribute to technical design decisions and support the delivery of midsize to large projects.

• Take ownership of selected applications, including post-launch support

What You'll Bring

• Strong experience with JavaScript, TypeScript, and React.

• Solid understanding of frontend development, from architecture to deployment.

• Hands-on experience with tools and frameworks such as Redux-Saga, Material UI, Jest, and Webpack.

• Experience with SDK development - building JavaScript/TypeScript libraries (npm packages), API design, versioning, backward compatibility.

• Knowledge of Passkey/WebAuthn - WebAuthn API, biometric authentication, FIDO2 standards.

• Understanding of cryptography - Web Crypto API, HSM integration, crypto operations, security best practices.

• Experience with anti-fraud mechanisms - JS Challenge, mTLS, device fingerprinting, bot detection.

• Understanding of widget/component integration - integrating third-party widgets, platform components.

• Platform mindset - building systems for other systems, API design, developer experience.

• Excellent communication skills and a collaborative mindset.

What we offer

• Full-time B2B contract

• Fully remote setup, work from anywhere in Europe

• Up to 20% tax allowance

• 22 paid leave days annually

• Stock options (ESOP) in a fast-scaling, pre-IPO company

• Flexi benefits you can use for wellness, travel, or learning

• Work alongside a high-performing, international engineering team in a global fintech unicorn

• Relocation support is available to our hubs in Armenia, Georgia, Serbia, Portugal, and Spain, including flights, temporary accommodation, and legal setup, for up to $5,000 in verified costs.