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cryptodevweb3Backend Developer
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About this role
Join Polkadot as a Senior Rust Backend Engineer to design and optimize high-performance trading APIs. Work on real-time systems and shape the architecture of our trading backend.
Description
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.
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, recovery, and correctness guarantees in event-driven systems.
- WebSocket Engineering: Understanding of connection upgrades, frame parsing, and data fanout for subscribed clients.
- Observability Engineering: Ability to design and instrument systems for metrics, logging, and tracing.
- Experience with Prometheus and OpenTelemetry in production.
- Track record of diagnosing and resolving performance bottlenecks and production incidents.
- Big Bonus: 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.
Job Details
Market range (est.)$120k–$245k
LocationOffice
AI Score★★★★★★☆☆☆☆ 6/10
PostedMay 12, 2026 (61d ago)
Tags & Skills
cryptodevweb3Backend Developeroffice
Tech Stack
RustTokioHTTPWebSocketDockerPrometheusOpenTelemetry