Backend Python Engineer – Cybersecurity

HarfangLab

Python Back End Developer developing backend solutions for EDR at HarfangLab. Working with a team in the cybersecurity sector and enhancing product efficiency.

Posted 5/31/2026full-timeParis • 🇫🇷 FranceJuniorMid-LevelWebsite

Tech Stack

Tools & technologies

DjangoElasticSearchFlaskKafkaKubernetesPython

About the role

Key responsibilities & impact

As a Python Back End Developer, you will be responsible for developing the backend of our EDR
Contributing to the construction and improvement of the product by adding new features, from conceptualization to code implementation
Addressing performance issues: the backend must handle and process data from 100,000 machines, so the code must be efficient
Ensuring the reliability of the backend, which is installed on-premise at our clients and needs to operate autonomously
Contributing to internal tooling to make the development process as seamless as possible
Providing input on areas of improvement in the existing codebase.

Requirements

What you’ll need

Degree in engineering, computer science or similar technical field
2 or 3 years experience in Python backend development
You are familiar with ElasticSearch, Kafka, or Kubernetes
You have experience with web development in Django or Flask
You master the use of profiling tools for Python (cProfile, memprof, py-spy)
You are comfortable leveraging AI-powered coding tools to improve development efficiency, code quality, and troubleshooting.

Benefits

Comp & perks

Health insurance: The best health insurance with Alan
Meal vouchers: We use the Swile card and also have access to a discount platform through our works council
7 to 11 additional days off (RTT) per year, in addition to the 25 days of paid vacation
GymLib subscription, covered 80% by HarfangLab
Access to training and events of your choice and according to your professional needs
Flexible remote work options
A mentor to guide you throughout your probationary period
An attractive package: Base salary + profit sharing

ATS Keywords

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Hard Skills & Tools

Pythonbackend developmentDjangoFlaskElasticSearchKafkaKubernetesprofiling toolscProfilememprof

Soft Skills

problem-solvingcollaborationcommunicationadaptabilityattention to detail

Certifications

degree in engineeringdegree in computer science