Senior Full-Stack Developer — Remote

Responsibilities

End-to-end product features across UI, APIs, and wallet flows; production reliability.

• Deliver features end-to-end: UI, API, data, and deployment-ready quality.
• Build and maintain Next.js surfaces for marketing and the ZyncSwap preview.
• Integrate APIs, auth, and wallet-related client flows.
• Keep production reliability, error handling, and performance in view.
• Collaborate with specialists on blockchain and infrastructure edges.

Requirements

Strong React and TypeScript; production full-stack experience; API design; responsive UI.

• Strong React, Next.js, and TypeScript.
• Production full-stack experience (UI plus APIs).
• API design and integration skills.
• Responsive UI and pragmatic testing.

Web3 experience

Preferred, not required.

Process

Profile review → GitHub technical assessment → technical interview with a stack specialist → final review.

1. 01

   Profile review

   We read your LinkedIn, GitHub/portfolio, and resume against the role stack.

2. 02

   GitHub technical assessment

   A practical task in the role’s stack. We look at judgment, clarity, and production habits — not trick questions.

3. 03

   Technical interview with a stack specialist

   Remote conversation on past work, ZyncSwap scope, and how you would ship in this codebase.

4. 04

   Final review

   We decide and reply by email at james@zynccoin.com.

Engagement

Remote · Full-time / long-term. 40 hours / week. BST (UTC+1) core hours — expect meaningful overlap with the UK / BST team during the workday.

About the role

You will ship features across the ZyncCoin website and ZyncSwap app: Next.js UI, TypeScript APIs, and the glue that makes wallet and market flows feel like one product. Web3 experience helps; strong product engineering is the bar.

Nice to have

• Wallet or payments UX.
• Node.js services in production.
• Vercel/Next.js App Router experience.

Compensation

$100,000–$170,000 USD / year · ZYNC grant