Pre-launch · In development · ZYNC is not listed · No live price, market cap, or holders · ZyncSwap is not a live exchange
ZYNCCOIN
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Hiring · Remote · Pre-launch product

Senior Backend Developer — Remote

Node.js · TypeScript · APIs · Databases

Join the engineering team building ZyncSwap, a non-custodial Web3 trading platform currently in active development.

Apply with name, email, LinkedIn, GitHub/portfolio, and resume. We reply at james@zynccoin.com.

Apply for this roleCompany

Responsibilities

Public APIs, market and account services, authentication, blockchain-facing reads, reliability and production operations.

  • Design and ship REST/WebSocket APIs for markets, swaps, and account-related flows.
  • Build services for quotes, product state, and blockchain-assisted reads.
  • Implement authentication, rate limiting, and abuse protections.
  • Own data models, migrations, and consistency for product state.
  • Improve observability: metrics, logs, tracing, and incident debugging.

Requirements

Strong TypeScript/Node.js; production APIs; databases; authentication; observability and debugging under load.

  • Strong TypeScript/Node.js (or equivalent) in production systems.
  • Experience designing public APIs used by real clients.
  • Comfort with databases, caching, and background jobs.
  • Pragmatic testing and debugging under load.

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 build the server-side systems behind ZyncSwap: APIs, data, auth, and blockchain-assisted reads. The app is a development preview today — your job is still production-grade backend work so the product can launch without rewriting the core.

Nice to have

  • Crypto/trading domain experience.
  • WebSocket or market-data systems.
  • Next.js API routes or similar full-stack TypeScript.

Compensation

$100,000–$165,000 USD / year · ZYNC grant