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Senior Backend Developer (Java)

Aster

Roles & Responsibilities

  • 5+ years of backend development experience (Java/TypeScript/Rust/Go)
  • Proficient in EVM smart contracts
  • Blockchain interaction experience (JSON-RPC, ethers.js/web3.py)
  • Database optimization (PostgreSQL/TimescaleDB/Redis)

Requirements:

  • Design blockchain data processing system architecture, including indexing, RPC layers, and event streaming; build real-time data pipelines (e.g., Kafka/RabbitMQ)
  • Develop high-performance REST/WebSocket/GraphQL APIs with low-latency requirements for high-frequency trading
  • Implement DeFi application logic, including price oracle integration and trading simulation; experience with futures or spot trading systems
  • Design microservices for wallet interactions and trading queue management; optimize gas fees and ensure infrastructure reliability (node management, load balancing, failover)

Job description

Aster is a next-generation decentralized perpetual exchange dedicated to delivering a seamless, powerful, and truly decentralized on-chain derivatives trading experience. From one-click trading to smart automation and deep on-chain liquidity, Aster is rethinking how DeFi should work — simple, efficient, and built for users.

Core Job Responsibilities
  • Blockchain Data Processing System Architecture
  • - 3+ years of experience in exchange core system development
  • - Design indexing systems, RPC interaction layers, and event stream processing architecture
  • - Build real-time data pipelines (e.g., Kafka/RabbitMQ integration)
  • High-Performance API Development
  • - Build REST/WebSocket/GraphQL interfaces
  • - Handle low-latency requirements in high-frequency trading scenarios
  •  DeFi Application Logic Implementation
  • - Price oracle integration
  • - Trading simulation engine development; 3+ years of futures or spot trading system development experience
  • - Risk control system implementation
  • Microservices Architecture Design
  • - Wallet interaction services
  • - Trading queue management
  • - Gas fee optimization strategies
  • Infrastructure Reliability Assurance
  • - Node management
  • - Load balancing
  • - Failover systems

    • Required Skills:
  • 5+ years of backend development experience (Java/TypeScript/Rust/Go), proficient in EVM smart contracts
  • Blockchain interaction experience (JSON-RPC, ethers.js/web3.py)
  • Database optimization (PostgreSQL/TimescaleDB/Redis)
  • Asynchronous architecture design (Kafka/RabbitMQ/Celery)

    • Preferred Knowledge:
  • Web3 ecosystem components (EVM, The Graph and other indexing solutions)
  • Security practices (rate limiting, input sanitization, replay attack protection)
  • Cloud deployment experience (AWS/GCP, containerization, IaC)
    •
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