Product Engineer

Product Engineer — Fintech & Crypto Payments

Swiss Nexus is recruiting Product Engineers for a client building crypto payment infrastructure. You’ll build user-facing payment experiences and developer integrations that connect traditional applications with onchain financial products.

This role suits an engineer who enjoys owning features, cares about the details of the user experience, and can turn complex financial workflows into simple, reliable interfaces.

What you’ll do

• Build and maintain React interfaces, reusable UI components, and SDKs for payment integrations.
• Own features from scoping and implementation through testing, launch, and iteration.
• Work with backend and protocol engineers on payment, routing, and identity flows.
• Improve frontend performance, reliability, and usability.
• Contribute to technical design, code reviews, and engineering standards.

What we’re looking for

• 3+ years of professional JavaScript and TypeScript experience.
• Professional experience building modern React applications.
• Fintech or financial-services product experience.
• Clear ownership of user-facing features, ideally in payments, trading, wallets, or other transactional products.
• Strong understanding of frontend performance, state management, and backend API integration.
• Comfort working in a fast-moving startup with a high degree of autonomy.

Helpful additional experience

• SDKs, developer tools, or complex third-party API integrations.
• Blockchain, EVM networks, onchain payments, or DeFi.
• High-traffic consumer or financial applications.
• Strong computer science fundamentals and sound judgment around correctness, performance, and technical tradeoffs.