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notional.xyz
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founding engineer

Mid / Senioron site
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1d ago
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Required skills

Test StrategyReliabilityIncident ResponseStorage Systems

Job description

[01] Open Role

founding engineer

Build backend infrastructure for the liquidity layer of finance.

how we work

A small team building trading infrastructure on top of Hyperliquid, with a focus on execution quality, margin efficiency, and systems reliability.

  • High ownership: Fast feedback loops and a strong bias toward shipping.
  • Pragmatic engineering quality: Clean interfaces, strong testing discipline, and measured performance work.
  • High leverage: A small team where your work directly defines core architecture.

what you’ll work on

  • Backend infrastructure: Build and scale backend systems for trading infrastructure.
  • Event-driven systems: Design reliable event-driven systems with durable logs, idempotent processing, replayability, and operational recovery.
  • Rust performance work: Implement performance-critical components in Rust with careful attention to latency, throughput, and correctness.
  • TypeScript services: Build product-facing APIs and services in TypeScript, integrating backend primitives cleanly and safely.
  • System quality: Own testing strategy, observability, incident response, and performance profiling across the stack.

what we’re looking for

Must-haves
  • Strong backend fundamentals: Concurrency, distributed systems, consistency, performance, and reliability.
  • TypeScript and Rust fluency: Comfort working in TypeScript for APIs, services, and tooling, plus lower-level languages such as Rust for latency-sensitive systems.
  • Systems mindset: Reason about trade-offs, keep designs simple, and prevent edge-case failures.
Strong bonus points
  • Quant or trading systems experience: Market data, execution, risk, simulation, or adjacent backend systems.
  • Exchange and derivatives exposure: Built or worked on exchanges, perps, derivatives, or margin and risk engines.
  • Low-latency engineering: Familiarity with efficient data structures, profiling, and cache-aware engineering patterns.
  • Storage systems: Experience with Postgres, LMDB, RocksDB, event logs, or similar storage layers.
  • Crypto-native infrastructure: Comfort with wallet and custody patterns or onchain and offchain reconciliation.

interview process + to apply

Interview process
  • Technical screen: A short conversation covering systems and coding fundamentals.
  • Architecture discussion: A deeper trading-systems conversation around perps, risk, and order flow.
  • Practical exercise: A small backend component or design review.
To apply

Email matthieu@notional.xyz with:

  • Short intro: What you have built, especially trading or exchange systems.
  • GitHub or portfolio: Include links if available.
  • LinkedIn or CV: Send whichever best reflects your background.