Backend Engineer

Who you are

• We are looking for a Backend Engineer to join our Data Platform - Ingestion squad, with solid TypeScript skills
• 3+ years of experience in backend development, including taking services to production and operating them over time: deployment, monitoring, alerting, incident management
• Strong backend engineering skills in at least one of: Python, TypeScript/Node.js, Java, Go or Scala. The squad works primarily in TypeScript and Python
• Experience designing APIs and integrating data from external sources
• Good understanding of SQL and NoSQL databases, and an interest in query optimisation
• Fluency in both English (essential for team collaboration) and French (for local interaction) is required
• Curiosity and AI usage: We actively embrace working with AI productivity tools such as Claude to solve problems, sharpen code quality, and maximize efficiency. Fully leveraging AI in our daily work is not just encouraged — it's an essential strength we cultivate
• Docker and Kubernetes
• Workflow orchestration or message brokers (Temporal, Dagster, Kafka)
• Experience in a regulated environment (health data, finance, public sector), or the habit of designing services with traceability and audit trails — knowing what was processed, when, and by which version of the service
• Knowledge of Avro, Parquet or Protobuf
• Already practiced TDD
• Open source project development experience
• A note on applying: we know the perfect candidate doesn't exist. If you believe you possess the core required experience and strongly align with this mindset, we highly encourage you to apply

What the job involves

• This is a backend engineering role serving a data domain
• You will build the services, connectors and orchestration that bring cardiac device data into our platform
• These services sit on a clinically critical path: the reliability of what you build has a direct impact on patient monitoring, and everything runs in a regulated HealthTech environment (HDS hosting, medical-device traceability)
• Reporting Structure:
• Direct Report: Julien Sarazin (Deputy CTO)
• Collaboration: Data Ingestion Squad
• Your missions:
• Develop and maintain the backend services of our ingestion platform (TypeScript, NestJS, Node.js)
• Build and evolve the connectors that integrate data from implanted and ambulatory cardiac devices - pacemakers, defibrillators, monitors - into the platform
• Orchestrate processing with Temporal, and handle service-to-service communication (RabbitMQ)
• Design and expose the APIs consumed by the rest of the platform
• Optimise access to our PostgreSQL, MariaDB and MongoDB databases
• Own reliability in production: Grafana, GitLab CI, deployment on Kubernetes and AWS
• Our stack is currently evolving. We do not expect expertise on every tool:
• Cloud & containers: AWS, Docker, Kubernetes
• Languages: TypeScript (primary), Python
• Backend: NestJS, Node.js — Architecture: microservices, event-driven
• Ingestion & orchestration: Transitioning to Temporal
• Databases: PostgreSQL, MariaDB, MongoDB, BigQuery
• CI/CD: GitLab CI — Testing: Jest, Xray
• Observability: Grafana, Prometheus, Datadog
• Collaboration: JIRA, Notion

The application process

• First contact with Astrid (Talent Acquisition) — 30-45 min - Remote
• Fit & vision interview with Louay (CTO) — 45 min - Remote
• Technical interview with members of the squad — 1h30-2h - On-site
• Meet your manager - 30 min & your Team - 30 min
• Reference check & offer
• Depending on your availability, the recruitment process should last less than 3-4 weeks