Backend Staff Engineer
New
K
KoinlyCrypto tax
Remote - Strictly Europe (EU / UK timezones). Note, we won’t review job applications from outside Europe., EU / UK timezonesContractStaff
Salary80,000 - 120,000 USD per year
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Job Details
- Experience
- 8+ years with a focus on complex, data-heavy distributed systems.
- Required Skills
- Node.jsPostgreSQLSQLRabbitmqTypeScriptRedisRustDistributed Systems
Requirements
- Have 8+ years of experience focused on complex, data-heavy distributed systems.
- Bring expert-level experience with modern TypeScript on the Node.js runtime.
- Understand distributed-system architecture and patterns including queues, workers, idempotency, backpressure, rate-limiting, and retries.
- Have real, production-level DeFi experience, including AMMs, lending, staking, LP positions, and bridges.
- Have advanced data modeling and SQL skills, including performance tuning on large PostgreSQL datasets.
- Have professional Rust experience and be able to read and write Rust confidently.
- Have deep production-level experience with RabbitMQ, Redis, PostgreSQL, node:test, and Sentry.
- Understand blockchain libraries and node/indexer APIs, RPC and provider reliability, ABIs, event logs, traces, token standards, and transaction semantics.
- Be fluent with AI development tools such as Claude, Codex, or Cursor and use them effectively in a professional workflow.
- Have experience parsing data and integrating with inconsistent third-party APIs and file formats.
Responsibilities
- Own the distributed backend data engine end-to-end.
- Ingest, normalize, and reconcile on-chain and exchange data.
- Optimize and refactor backend architecture for deterministic execution, high availability, and financial-grade correctness.
- Make architectural decisions and take ownership of the backend data pipeline.
- Work with product and engineering leads to evaluate ideas and propose architectural solutions.
- Write high-quality code and raise engineering standards across the backend team.
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