Job Description
Career Opportunity for a Senior Rust Backend Engineer in Japan!
■ Senior Rust Backend Engineer
■ Company Overview
A Japan-originated global Web3 technology company building next-generation blockchain infrastructure, decentralized applications, and on-chain products. With strong partnerships across major global enterprises and financial institutions, it is focused on bringing blockchain technology into mainstream use and building the infrastructure for the next generation of the internet.
■ Your Role and Responsibilities
● Own the architecture and technical direction of high-performance trading APIs (HTTP & WebSocket) supporting low-latency order entry, market data distribution, and account state updates.
● Lead the design and implementation of structured concurrency using the Tokio runtime, defining best practices for task lifecycle management, cancellation semantics, backpressure, and graceful degradation under load.
● Develop and maintain real-time state ingestion pipelines:
● Process append-only logs (e.g., trades, order updates, book diffs).
● Rebuild local states efficiently using snapshot + diff application.
● Model trading-related data structures, including orders, fills, trades, positions, funding, and liquidation logic.
● Implement WebSocket connection logic, including upgrade handling, frame parsing, and data fanout for subscribed clients.
● Design observable backend systems with rich metrics, structured logging, and distributed tracing for performance insights and failure analysis.
● Collaborate with system and infrastructure engineers to continuously improve performance, scalability, and fault tolerance.
● Write comprehensive unit, integration, and load tests to ensure stability under production conditions.
■ Experience and Qualifications
● Rust Expertise
● 5+ years of professional backend engineering experience, with 3+ years of Rust in production.
● Strong experience with the Tokio async runtime and concurrent programming patterns.
● Deep understanding of structured concurrency and robust handling of spawned task cancellation.
● Hands-on experience with HTTP and WebSocket frameworks such as Hyper or similar.
Trading Literacy
● Solid understanding of CEX/DEX systems and trading models.
● Familiarity with data modeling for trading entities (orders, trades, positions, funding, mark price, margin, liquidation logic, etc.).
● Prior hands-on trading or market data experience (personal or professional).
State Ingestion & Processing
● Expertise in real-time data streaming and processing systems.
● Ability to design systems that rebuild local state efficiently from snapshots and diffs.
● Familiarity with replay, recovery, and correctness guarantees in event- driven systems.
■ Additional Preferred Qualifications
● Performance Engineering
● Deep understanding of lock-free or lock-avoidant data structures
● Experience designing cache-friendly data layouts and optimizing for memory locality in latency-sensitive systems.
● Proficiency in profiling CPU and memory performance and able to diagnose and optimize latencies in real-time event pipelines
● DevOps & CI/CD
● Familiarity with Docker-based environments and CI/CD pipelines.
■ Good Reasons to Join
● Join a highly technical startup environment where engineers have
significant ownership and direct product impact.
■ Work Location
Tokyo, Japan
Details will be provided during the meeting.