Go Backend Engineer

 Key Responsibilities

• Design, implement, and maintain robust API integrations with crypto exchanges and payment processors:
  • WhiteBIT
  • Kraken
  • Wallester (card issuing & payment infrastructure)
  • Other providers (Binance, Coinbase, Bybit, MoonPay, Ramp, Sardine, etc.)
• Develop reliable order execution, balance syncing, webhook handling, and fund movement flows.
• Build internal services for trade aggregation, liquidity management, fee calculation, and risk monitoring.
• Implement secure credential management, rate limiting, retry logic, and circuit breakers for external APIs.
• Ensure high availability, low latency, and auditability of all financial integrations.
• Work closely with the card issuing team, frontend, and DevOps to deliver end-to-end crypto spending experience.
• Write comprehensive tests, monitoring, and alerting for integration health.

Requirements

• Strong experience with Go (Golang) — minimum 3+ years of production backend development.
• Solid understanding of REST and WebSocket APIs, JSON processing, and asynchronous programming.
• Previous experience integrating with crypto exchanges (especially WhiteBIT, Kraken, or similar) is a big plus.
• Experience with payment processors or card issuing platforms (Wallester, Stripe, Visa, etc.) is highly desirable.
• Knowledge of security best practices: API key management, encryption, secure storage (Hashicorp Vault, etc.).
• Comfortable working with PostgreSQL, Redis, Kafka/NATS, and Docker/Kubernetes environments.
• Understanding of crypto fundamentals (wallets, trading pairs, order books, on-chain vs off-chain operations).

Nice-to-Haves

• Experience with Go microservices architecture and event-driven systems.
• Familiarity with financial regulations (KYC/AML, PCI-DSS).
• Knowledge of Web3 libraries or blockchain interaction (Ethereum, Solana, etc.).
• Experience building high-throughput trading or fintech systems.

What We Offer

• Competitive salary
• Remote-first culture with flexible hours
• Opportunity to work on a product that bridges crypto and everyday spending
• Direct impact on core product features
• Modern tech stack and supportive engineering team