Senior backend developer (node.js)
Remote | from $5000
Company: Crypto Payment Processing
Location: Remote
Money: From $5000
Seeking candidates with practical blockchain experience
About Us
We are a processing platform for accepting and sending cryptocurrency payments. Our product is a high-load backend with deep integration into the blockchain infrastructure, plus convenient tools for clients: personal account, analytics, balance and transaction management.
What you will be working on:
- Integration with blockchain nodes: monitoring on-chain events, parsing transactions, managing confirmations depth in EVM networks and UTXO chains (Bitcoin, Litecoin, etc.)
- Development of receiving and payout services: address generation, hot/cold wallet logic, sweeping, fee estimation
- Building a reliable transactional pipeline with idempotency, reconciliation, and double-entry
- API for the merchant account: transaction history, balances, webhooks, payout management
- Designing and supporting REST / WebSocket APIs for the frontend and external integrations
- Participation in designing a microservice architecture and inter-service communication
- Optimizing database queries, working with high-load scenarios
What we expect from you:
- 5+ years of backend development experience, including 3+ years with Node.js / TypeScript
- Practical experience with blockchain
- Understanding of EVM networks: Proficient in PostgreSQL: complex queries, indexes, partitioning
- Experience in designing REST APIs: versioning, documentation (OpenAPI / Swagger)
- Understanding of microservice architecture principles, experience with message brokers (Kafka, RabbitMQ or similar)
- Experience working with Redis: caching, queues, rate limiting
- Understanding of financial logic: double-entry, data consistency, idempotency
- Experience writing tests: unit, integration
- Docker, basic CI/CD knowledge
Will be a plus
- Experience in self-configuring and operating blockchain nodes
- Experience in fintech, payment processing, or cryptocurrency projects
- Familiarity with KYC/AML processes and transaction screening (Chainalysis, Elliptic, etc.)
- Experience with ClickHouse for analytical loads
- Observability: Prometheus, Grafana, structured logging
What we offer:
- Work in a small but professional and dynamic team without bureaucracy
- We value initiative, responsibility, and attention to detail.
- Flexible work format: fully remote, flexible schedule.
- Competitive salary (in USD / USDT / RUB).
📌We look forward to your applications, send your resumes to DM nastya_ivch
