About the role

Senior Data & Platform Engineer leading the design and operations of data systems for post-quantum cryptography. Working on COMPASS, the observability platform for innovative cybersecurity solutions.

Responsibilities

As Senior Data & Platform Engineer, you will lead the design, setup, and operation of the entire data backbone powering **COMPASS**.
Define and maintain the **end-to-end data model** for COMPASS (entities, relationships, vocabulary, lifecycle).
Translate product requirements into **robust database schemas**, indexing strategies, and normalization/denormalization choices.
Ensure **semantic consistency** and data governance rules across all services.
Design, validate, and maintain ingestion pipelines using **Kafka**, ensuring data correctness and consistency.
Define the **canonical formats** exchanged across Kafka (ingestion), PostgreSQL (storage), and Elasticsearch (search).
Validate and standardize data structures produced by probes, sensors, and backend services.
Work closely with backend teams to design **API-level data contracts** aligned with the data model.
Optimize queries, indexes, and persistence strategies for real-time workloads and analytics.
Contribute to platform-wide observability by defining **structured logs**, metadata standards, and ingestion patterns.
Promote best practices for **data quality**, versioning, retention, and schema evolution.

**15+ years** of experience in software or data engineering in a distributed or complex environment.
Master’s degree from a French engineering school or European equivalent.
Deep expertise in:
**Data modeling** & relational schema design
**PostgreSQL** administration & performance optimization
**Kafka** (setup, topics/partitions, consumer groups, schema registry, monitoring)
**Elasticsearch / ELK stack**
Strong hands-on experience with:
Stream processing architectures
ETL/ELT workflows
Data lifecycle management
Proven ability to design data flows with **clean, contract-based schemas**.
Strong commitment to code quality, documentation, and operational reliability.
Fluency in English.
**Bonus**
Experience with ClickHouse, Grafana, or Prometheus.
Understanding of secure data handling and cryptographic components.
Familiarity with AWS/GCP or hybrid on-prem architectures.
Background in cybersecurity, observability, or high-throughput systems.
Experience with large-scale data retention strategies and analytics workloads.

Join a **deeptech company** at the forefront of post-quantum cybersecurity.
Build the **core data infrastructure** of a cutting-edge observability platform.
Collaborate with world-class cryptographers and software engineers.
Flexible hybrid/remote policy and office in central Paris.
Competitive compensation aligned with seniority and expertise.
Direct impact on a product used by major financial and defense clients.
A chance to shape the **future of quantum-safe data engineering**.