Senior Tech Lead - Data Pipelines & AI (Paris On-Site)

Arlequin AI; Paris; On-site; EUR 80,000 - 100,000; Full time

Benefits offered by this job

80-100k+€ + BSPCE

On-site central Paris

Job summary

Arlequin AI is building a sovereign European AI platform to process massive data with bias-free results, with high-impact use cases like fighting disinformation. You will join to own key technical initiatives, including data pipeline architecture and production AI infrastructure, guiding a team, and mentoring engineers.

You’ll code 50–70% of your time and shape the engineering standards and long-term scalability as the company grows toward ambitious projects in parallel.

Qualifications

• 6+ years of SWE experience, including at least 3 on complex or data-intensive architectures.
• Mastery of a modern TypeScript/Node stack AND comfort with Python for data pipelines
• At least one area of excellence among: data pipelines at scale, ML/AI in production, distributed systems, or frontend
• Ability to code AND guide a team technically — you make the difference by example, not by hierarchy
• A real appetite for mentoring, code review and setting engineering standards
• Ideally Series A to B/C startup experience
• Professional English

Responsibilities

• Own, alongside the Head of Engineering, the most structuring technical initiatives: large-scale data pipeline architecture, production AI infrastructure, integration of unsupervised models on massive datasets
• Code 50–70% of your time in areas where senior technical judgment makes the difference, and guide the rest of the team through expertise and mentoring
• Help relieve the Head of Engineering on complex initiatives and enable absorption of multiple ambitious projects in parallel
• Guide monorepo scalability and engineering standards
• Mentor team, perform code reviews, and help set engineering standards

Skills

SWE experience

TypeScript/Node

Python for data pipelines

Data pipelines at scale

Mentoring & code reviews

Startup experience (Series A–B/C)

Tools

Monorepo (Turbo)

React 19

Hono

Node 24

PostgreSQL

Drizzle

Docker

Job description

Arlequin AI is building a sovereign European AI platform to process massive data with bias-free results, with high-impact use cases like fighting disinformation. You will join to own key technical initiatives, including data pipeline architecture and production AI infrastructure, guiding a team, and mentoring engineers.

You’ll code 50–70% of your time and shape the engineering standards and long-term scalability as the company grows toward ambitious projects in parallel.