Software Engineer - full stack - (m/f/d)

About

Qevlar AI is revolutionizing the SOC with autonomous investigation and, in doing so, solving three key problems for analysts: the cybersecurity talent shortage, alert fatigue, and increasingly complex and sophisticated threats.

Founded in 2023, we’ve already made waves in cybersecurity, AI, and start-up communities. A few highlights:

  • Raised $14M in funding led by EQT Ventures and Forgepoint Capital

  • Accepted into Station F’s flagship AI program (Meta, Hugging Face, Scaleway)

  • Named by Sifted (Financial Times) as one of Europe’s cybersecurity startups to watch

  • Joined Platform 58, La Banque Postale’s premier startup incubator

  • Ranked among the top 10 most innovative startups in France by EU-Startups

  • Secured early partnerships with major players across EMEA, NAMER, and MENA

  • We have some exciting (and impressive) Fortune 500 customers we’re really excited about.

We’re at a pivotal stage — building fast, growing smart, and bringing on sharp minds to shape the future of autonomous cyber defense.

Job Description

What will you do?

  • You’ll play a critical role in evolving our core web platform — both frontend and backend — with a focus on performance, API design, and product integrations. This is a backend-heavy role with a full-stack flavour.

    Backend Scalability & API Performance

    • Refactor REST APIs to reduce over-fetching and inefficient database calls.
    • Push async processing across high-latency parts of the stack.
    • Introduce structured pagination, connection pooling, or background jobs

    Database Modelling & Architecture

    • Enhance scalability and maintainability.
    • Debug, refactor, and optimise slow queries.

    Integrations & Observability

    • Hook up tools like PostHog, Mixpanel, and Sentry for better product & tech insight
    • Build integrations with external APIs for internal tools or client-facing features

Preferred Experience

You’re probably a great fit if you:

  • >5y of experience in a professional software team.

  • Strong Python developer with experience using SQLAlchemy

  • Frontend experience with Vue.js (or another SPA framework)

  • Comfortable with frontend responsiveness, UX, and styling polish

  • Solid CSS skills (flexbox, CSS variables, utility-first frameworks)

  • Deep experience with PostgreSQL and relational design

  • Query performance ninja — can explain indexing, execution plans, JOIN optimisation, and caches

  • Knowledge of security best practices (JWT, SSO, OWASP top 10)

  • Skilled in designing efficient, scalable REST APIs

  • Actively contributed to a product-centric team.

  • Have strong object-oriented programming skills.

  • Proactively solve problems and confront challenges.

  • Value teamwork, collaboration, and collective achievements.

  • Interest in Large Language Models.

  • Fundamental understanding of Machine Learning.

Our stack

  • Backend: Python (FastAPI + SQLAlchemy)

  • Frontend: Vue.js

  • Database: PostgreSQL

What Success Looks Like

  • Noticeably faster frontend performance

  • Cleaner, more maintainable APIs and schemas

  • Improved monitoring and external tool integrations

  • Seamless collaboration with other engineers and product folks

  • Tangible impact on platform features and user experience

Recruitment Process

  • Introduction call - online (30min)

  • Code Interview - online (Python)

  • Front-end Interview - online (Vue.js)

  • Meet the founders and get to know the team - online & onsite

ready to become a Qevlarian? apply here

Additional Information

  • Contract Type: Full-Time
  • Location: Paris
  • Education Level: Master's Degree
  • Experience: > 5 years
  • Possible partial remote
Apply Now

See Other Qevlar AI Job Listings