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Founding Engineer - AI @DetectX (Hexa Labs)

About

We build the future of work: since 2011 we have launched 14 startups, with more in the works. We build businesses from the ground up to invent the tools of tomorrow and inspire new ways of working.
Our companies currently employ 500 people across the world... And they all started here: Mailjet, TextMaster, Mention, Front, Aircall, Hivy, Spendesk, Forest, Slite, Station, Upflow.

With $175M in total funding from some of the most prestigious investors in the world (Sequoia, Balderton, Index, Alven, ...), our startups build the future of work.

We have new projects in the making, apply to join the next big thing!

Job Description

As a founding engineer you will take a crucial part of building the whole product and the underlying tech, hand-in-hand with Théo, the CTO. In such an early-stage, fast-paced environment, you are expected to write code for every part of the product. Mostly focused on backend and AI-related work, you will also have the opportunity to built our awesome frontend.

Your mission

Joining DetectX at this early stage means having a high impact on our technology and future team. You’ll work alongside the CTO to:

  • Design & scale our AI-driven code analysis engine (Python/Go).

  • Fine-tune ML models to reduce false positives in vulnerability detection.

  • Build robust backend systems for large-scale code analysis.

  • Contribute across the stack (some frontend work in React/Typescript).

  • Mentor future engineers as the team grows.

Preferred Experience

  • 2+ years in backend engineering, with Python experience (FastAPI).

  • 3+ years in AI/ML engineering having deployed pipelines and/or models in production.

    Bonus point if you have :

  • Exposure to security world (SAST, DAST, reverse engineering).

  • Experience with React / Typescript

  • Startup-friendly: You thrive in ambiguity, move fast, and own outcomes.

  • Security mindset with strong collaboration skills. You communicate effectively with anyone and are deeply motivated by DetectX's mission

Our tech stack

  • Backend: Python (FastAPI), Go

  • Frontend: TypeScript (React)

  • Infrastructure: AWS, Terraform, Kubernetes

  • Tooling: Bazel

What we offer

  • Competitive salary + stock options.

  • Strong technical culture and entrepreneurial spirit.

  • Lovely offices at Hexa, in Paris (75010)

  • Hybrid remote: 3 days a week in the office, the rest is up to you

  • High-end Apple hardware and ergonomic accessories.

Additional Information

  • Contract Type: Full-Time
  • Location: Paris
  • Possible partial remote
Apply Now

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