Founding Engineer - Full Stack / AI @DetectX

☀️ We are DetectX
DetectX was founded by Emmanuelle (CEO) & Theo (CTO), two entrepreneurs passionate about cybersecurity. We aim to build the future of AI-powered application security. Traditional vulnerability scanners drown engineers in false positives, we cut through the noise with context-aware exploitability analysis, helping teams focus on real threats.
As a founding engineer you will take a crucial part of building the whole product and the underlying tech, hand-in-hand with 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.
🚀 We are backed by Hexa (eFounders)
Hexa partner with talented cofounders to build the future of product-led SaaS.Hexa pioneered the startup studio model in 2011 and have since launched over 40 companies (7 of them have made exits) with $700M in funding and now reaching a valuation of over $5 billion - including Front, Aircall and Spendesk which recently became unicorns.
Today, over 2,500 employees across the world work in a startup which started out as a simple mockup right here at eFounders.
⭐ Companies:  Roundtable • Elba • Dotfile • Swan • Cycle • Folk • Upflow • Yousign + many other startups and more to come 🚀

🎯 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.

🤩 Is that you?

• 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


• We are product-focused engineers. Don't hesitate to apply even if you're not familiar with every tool in our stack!

👋 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.

Hexa is committed to creating a diverse environment. All qualified applicants will receive consideration for employment irrespective of gender, origins, identity, background and sexual orientations.
We are aware there’s a long way to go with regards to diversity in our industry, which is why we encourage all applicants- and especially those listed above- to apply to our open positions.