Senior Data Engineer — AI Analytics Pipelines (Node/TS)

MentionLab; Brussel; Hybride; EUR 80 000 - 110 000; Plein temps

Avantages offerts par ce poste

Car/Mobility budget

Insurance

Résumé du poste

MentionLab, based in Brussels, seeks a Senior Data Engineer to own the data layer at the heart of our product and to design the pipelines turning raw AI answers into reliable, structured data.

You will build ClickHouse models and power our analytics platform, working primarily with TypeScript and SQL, with Rust for performance-critical processing. Join a fast-moving team shaping AI-driven discovery.

Qualifications

• 5+ years of engineering experience, including building and running production data pipelines.
• Strong, hands-on experience with data modelling, query optimisation and performance tuning on an analytical database (ClickHouse strongly preferred).
• Solid Node.js/TypeScript skills: pipelines are written in TypeScript, not Python.
• Advanced SQL.
• Experience with queue-based or event-driven processing at scale (retries, idempotency, backpressure).
• Comfortable working across both analytical and transactional databases.
• Experience with AI-assisted development tools (Copilot, Cursor, Claude Code, or similar).

Responsabilités

• Own our data architecture end to end: ingestion, transformation, storage and delivery.
• Build and scale the pipelines that process what AI engines say across markets, languages and models.
• Design ClickHouse data models and queries that stay fast as volumes grow.
• Guarantee data quality through validation, deduplication, monitoring and backfills.
• Run high-throughput, queue-based processing reliably in production.
• Work mainly in TypeScript and SQL, with Rust for performance-critical processing.
• Raise the engineering bar through code reviews, standards and mentoring.

Connaissances

Data pipelines

TypeScript

SQL

ClickHouse

Node.js

BullMQ

Outils

NestJS

MikroORM

Knex

PostgreSQL

Description du poste

MentionLab, based in Brussels, seeks a Senior Data Engineer to own the data layer at the heart of our product and to design the pipelines turning raw AI answers into reliable, structured data.

You will build ClickHouse models and power our analytics platform, working primarily with TypeScript and SQL, with Rust for performance-critical processing. Join a fast-moving team shaping AI-driven discovery.