Senior Backend Engineer

Senior Backend Engineer at Ledger, remote (Paris, France). Requires 5+ years backend experience, blockchain integration, and interest in Scala/functional programming.

Our wishes for candidates: - 5+ years of backend engineering, with real production ownership of distributed systems - Strong production experience - Interest for Scala and functional programming practice - Hands-on blockchain integration experience: transaction lifecycle, fees, finality, reorgs, on at least two models among account-based, UTXO and privacy-preserving chains - Experience with event-driven systems and data infrastructure (PostgreSQL, RabbitMQ, NATS or equivalent) and with observability tooling (Datadog or equivalent) - Able to diagnose an incident across several services and own the outcome, from root cause to fix in production - Comfortable reading and contributing to TypeScript code, as the team works on a polyglot stack - Daily use of AI coding tools, with a critical eye on their output - Clear written communication in English, especially for design documents and incident reports

- 5+ years of backend engineering, with real production ownership of distributed systems - Strong production experience - Interest for Scala and functional programming practice - Hands-on blockchain integration experience: transaction lifecycle, fees, finality, reorgs, on at least two models among account-based, UTXO and privacy-preserving chains - Experience with event-driven systems and data infrastructure (PostgreSQL, RabbitMQ, NATS or equivalent) and with observability tooling (Datadog or equivalent) - Able to diagnose an incident across several services and own the outcome, from root cause to fix in production - Comfortable reading and contributing to TypeScript code, as the team works on a polyglot stack - Daily use of AI coding tools, with a critical eye on their output - Clear written communication in English, especially for design documents and incident reports

Remote work (Paris, France)