Fullstack Engineer

Arlq; Paris; Hybride; EUR 60 000 - 90 000; Plein temps

Résumé du poste

Arlequin is building a sovereign European alternative to Palantir, an AI platform for processing massive data with bias-free insights. You will join a ten-person team to work on ingestion pipelines, backend data processing, and frontend exploration interfaces for HUDEX.

The role emphasizes end-to-end feature ownership, learning from senior engineers, and contributing to architecture decisions in a startup environment in Paris.

Qualifications

• 1–5 years of fullstack experience.
• Strong command of TypeScript and a modern React ecosystem.
• Comfortable with a Node backend and ORM (Drizzle, Prisma or equivalent).
• A desire to understand architectural choices, not just execute.
• Professional English.

Responsabilités

• Contribute to both sides of the HUDEX platform: ingestion pipelines and data processing on the backend.
• Develop exploration and analysis interfaces on the frontend.
• Take ownership of complete features from end to end with mentorship from senior engineers.
• Collaborate on architecture decisions and code quality.

Connaissances

TypeScript

React

Fullstack

Architecture thinking

English

Outils

Drizzle ORM

Prisma

Node.js

Docker

Vite

Turbo

Azure Container Registry

Monorepo npm workspaces

Python

Description du poste

Contribute to both sides of HUDEX: ingestion pipelines and data processing on the backend, exploration and analysis interfaces on the frontend.

1–5 years of experience

Full-time

On-site in Paris

About Arlequin

Arlequin is building the sovereign European alternative to Palantir: an AI platform capable of processing massive data volumes without bias, with high-impact use cases such as fighting disinformation. Founded in late 2024 by Hugo Micheron (researcher in geopolitics and systemic risk) and Antoine Jardin (CNRS research engineer).

~30 people, post-seed, Series A in progress. On-site in Paris.

The role

You’ll join a team of around ten people to contribute to both sides of the platform — ingestion pipelines and data processing on the backend, exploration and analysis interfaces on the frontend. Our product (HUDEX) enables non-technical analysts to interpret narrative dynamics across large-scale digital ecosystems. You’ll work alongside senior engineers who mentor you on architecture, and you’ll quickly take ownership of complete features from end to end.

Stack

Backend: Hono, Node 24, Drizzle ORM, PostgreSQL, OpenAuth

Build & infra: monorepo npm workspaces + Turbo, Vite, Docker, Azure Container Registry

Data : Python

What we’re looking for

1–5 years of fullstack experience

Strong command of TypeScript and a modern React ecosystem

Comfortable with a Node backend and ORM (Drizzle, Prisma or equivalent)

A desire to understand architectural choices, not just execute

Professional English

Bonus

Already comfortable in a startup environment

Mastery of agentic coding tools and code models

Exposure to Python / AI

Experience with harness coding / implementation

Interest in emerging tools and paradigms

Fast learning on TypeScript codebases

Process (~2 weeks)

Screening (15 min)

Fit interview (30 min)

Technical interview (1h)

Founder culture fit (45 min)

Reference calls

Offer

Package

On-site central Paris