Senior Scala Backend Engineer - Blockchain Wallet

Ledger; Paris; Hybrid; EUR 90,000 - 150,000; Full time

Benefits offered by this job

Flexible work options - Hybrid

Health & Wellness support

Commuter allowance

Learning & Development

Job summary

Ledger in Paris is seeking a Senior Scala Backend Engineer to join the Cloud Wallet team. You will design, build and operate the Scala services powering Ledger wallets and the Ledger Enterprise platform, enabling secure account management and on-chain data processing.

You will lead blockchain integrations end to end, own production quality, and mentor other engineers while collaborating with multiple teams including Coin Integration, Ledger Enterprise, and Wallet XP.

Qualifications

• 5+ years backend engineering with distributed systems ownership.
• Hands-on blockchain integration experience across account-based, UTXO or privacy-preserving chains.
• Interest in Scala and functional programming practices.
• Familiarity with event-driven systems and data infrastructure (PostgreSQL, RabbitMQ, NATS) and observability tooling like Datadog.
• Ability to diagnose incidents across multiple services and drive production fixes.

Responsibilities

• Design, build and operate the Scala services powering Ledger wallets and Ledger Enterprise backend.
• Lead end-to-end blockchain integrations from design to production across multiple chain models.
• Own production quality: SLIs/SLOs, observability, incident management and remediation.
• Define contracts with Coin Integration and Ledger Enterprise teams.
• Write ADRs, review designs, and manage technical debt; mentor other engineers.
• Collaborate cross-functionally with Coin Integration, Ledger Enterprise, Wallet XP, Blockchain Platform, Infrastructure and Security teams.
• Utilize AI coding tools daily and contribute to team AI tooling.

Skills

Scala

Functional programming

Distributed systems

Blockchain integration

PostgreSQL

RabbitMQ

NATS

Observability

Incident management

TypeScript

AI coding tools

English communication

Tools

Datadog

PostgreSQL

RabbitMQ

NATS

Job description

Ledger in Paris is seeking a Senior Scala Backend Engineer to join the Cloud Wallet team. You will design, build and operate the Scala services powering Ledger wallets and the Ledger Enterprise platform, enabling secure account management and on-chain data processing.

You will lead blockchain integrations end to end, own production quality, and mentor other engineers while collaborating with multiple teams including Coin Integration, Ledger Enterprise, and Wallet XP.