Despre postul vacant
Input Output is hiring a Software Engineer focused on the Midnight Indexer, a Rust service that streams blockchain data to wallets and end-user applications through a high-performance GraphQL API. The role covers indexer development, data pipelines, APIs, testing, and operational quality.
Responsibilities
- Design, build, and operate Indexer components in Rust, including the chain indexer, wallet indexer, SPO indexer, and GraphQL API.
- Build and maintain a data pipeline that fetches blocks and transactions from the Midnight node via subxt, including finalised-block tracking, backfilling, and continuous indexing.
- Design efficient schemas and queries for PostgreSQL and SQLite while maintaining latency and throughput.
- Evolve the GraphQL API with queries, mutations, and real-time WebSocket subscriptions, including secure handling of shielded data and wallet sessions.
- Write and maintain unit, integration, and end-to-end tests.
- Own observability, containerised deployment with Docker, and incident response.
- Participate in code reviews and technical design discussions and collaborate with node, ledger, wallet, and security teams.
Stack
Rust, Tokio, subxt, Substrate and Polkadot, PostgreSQL, SQLite, GraphQL, WebSockets, Docker, WASM, and Cardano.
- Full-time employment.
Company
Input Output is building Midnight, a regulatory-friendly, data-protection blockchain that safeguards sensitive commercial and personal data.
Nice to have
- Substrate or Polkadot ecosystem experience, especially subxt, pallets, and runtime development.
- Familiarity with blockchain core concepts, including consensus, cryptography, and transaction and state models.
- Applied cryptography or zero-knowledge experience or interest.
- WASM and Cardano or partner-chain context.