Job Opportunities API

About Us In partnership with one of the largest financial conglomerates, we aim to bring the majority of Japanese equities on-chain, creating a secure, transparent, and high-performance trading infrastructure that can support institutional volumes while remaining accessible to retail participants. We are building a next-generation decentralized exchange with a fully on-chain order book. Our system is built with a custom state transition function and consensus layer, purpose-designed for high-performance, low-latency trading. The goal is to deliver a trustless platform that matches the speed and efficiency of traditional trading engines while providing full transparency by running execution as close as possible to the blockchain itself. Position Overview We are seeking a  Senior Rust Backend Engineer  experienced in building  high-performance, reliable trading APIs (HTTP & WebSocket) . You will be responsible for designing, implementing, and optimizing the backend services that power our exchange interfaces - ensuring low latency, resilience, and correctness under load. You’ll work on high-throughput, real-time systems that handle order and trade data ingestion, manage live WebSocket feeds, and maintain internal state consistency from streaming market events. The ideal candidate is both a strong Rust engineer and a system thinker, capable of reasoning about concurrency, data flow, and observability in production environments. This role offers an opportunity to shape the architecture of our trading backend at an early stage, working alongside a distributed team of seasoned engineers building next-generation financial infrastructure. Key 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. Requirements 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, r