Full-stack Software Engineer Engineering Paris

Kleep; Paris; In loco; EUR 13.000 - 20.000; Part-time

Descrizione del lavoro

Kleep is seeking a full-stack intern to help ship product quickly, collaborating with the CTO, Head of Machine Learning, and the broader team. You will move between front-end and back-end as needed, prototyping with Claude Code to deliver features for fashion brands.

You will gain exposure to modern stacks (TypeScript, React, AWS, GCP) and own components from day one in Paris (9th arrondissement). The internship is imminent with a flexible start date.

Competenze

• Seeking an internship in full-stack development.

Mansioni

• Build and improve front-end and back-end features
• Turn product needs into clear technical execution
• Prototype and ship projects using Claude Code
• Contribute to back-end development when needed

Conoscenze

React

Next.js

TypeScript

Curiosity

Ownership

Strumenti

Claude Code

AWS

GCP

Descrizione del lavoro

Ship product fast alongside the CTO and Head of Machine Learning, front-end and back-end, prototyped and built with AI coding tools like Claude Code.

We are looking for a full-stack intern to help us ship product fast. You will get real exposure to full-stack development, working closely with the CTO, the Head of Machine Learning and the whole team, contributing directly to what we put in front of brands.

You will use tools like Claude Code (Max) to rapidly prototype and build new projects, which means moving between front-end and back-end depending on what the product needs.

What you will do

• Build and improve front-end and back-end features
• Turn product needs into clear technical execution
• Prototype and ship projects using AI coding tools like Claude Code
• Contribute to back-end development when needed

Who you are

• Comfortable with modern front-end frameworks (React / Next.js)
• Hungry to learn product building and technical execution
• Organized, curious, ambitious, and you want ownership
• Curious about new dev workflows, especially AI-assisted coding
• Comfortable moving fast in a startup environment with high stakes

The stack

• Front-end: TypeScript, React
• Infrastructure: AWS, GCP
• Start date: as soon as possible (flexible)
• Contract: Internship
• Location: Paris (9th arrondissement)

Why Kleep

Kleep builds the intelligence layer for fashion e-commerce: sizing, discovery and AI imagery that 300+ brands run in production, Givenchy, Lacoste and Victoria Beckham among them. Every product is proven in live A/B tests, not in decks.

We are a small, senior, international team with offices in Paris (9th arrondissement) and, since January 2026, New York. The company is led by its founders: Federico (CEO, previously in venture capital and private equity) and Théophile (CTO, an ENS and Mines Paris engineer who worked in trading and quantitative research at Morgan Stanley and BNP Paribas).

Ownership here is real: ideas are heard, feedback flows both ways, and impact is tangible from day one. We hold a high bar, celebrate together, weekly team drinks, monthly events, annual off-sites, and stay serious about the work, never about ourselves.