##### ***Who we are?***

**HarfangLab is a French scale-up specializing in cybersecurity** that develops **EDR** (Endpoint Detection and Response), **EPP** (Endpoint Protection Platform ), and **ASM** (Attack Surface Management) solutions **to detect and neutralize modern cyberattacks targeting an organization's workstations and servers**. Our engines, models, and algorithms identify abnormal behaviors and either generate security alerts or block program execution.

**Since our creation in 2018, HarfangLab's technology has received strong industry recognition** , earning prestigious distinctions and becoming the **first EDR to be certified by ANSSI** in 2020, and later the first to obtain ANSSI qualification in 2025. We are also proud to have joined the **French Tech 2030 program** alongside 80 other innovative French companies, at a time when cyber resilience has become a major strategic priority for Europe.

We have raised a total of €30 million, enabling us to strengthen our teams, growing from 40 employees in 2023 to 130 today, and **expand internationally across Europe**.

**Today, HarfangLab protects the endpoints of more than 800 clients of all sizes and across all sectors: CAC 40 industrial companies, government entities, SMEs, hospitals, and local authorities.** With a strong collective spirit and international ambitions, HarfangLab continues its expansion while remaining true to its original mission: **protecting organizations against increasingly complex cyber threats while enabling clients to retain full control over their data.**

*** ** * ** ***

**Why are we hiring?**

Entreprise's growth continues, and we have plenty of ideas on what we want to enhance in the product.

***What you will do with us?***

As a Senior **Python Back End Developer**, you will be responsible for developing the backend of our EDR, which stores, processes, and displays telemetry data collected from the IT infrastructure. The backend plays a central role in the product, requiring daily interaction with frontend, agent, and devops teams as needed.

Your responsibilities will include:

* Taking ownership of key product features, from technical design to implementation, deployment, and maintenance.

* Driving architectural decisions and ensuring the scalability and performance of a platform processing data from over 100,000 connected machines.

* Ensuring the reliability and resilience of our backend systems deployed on-premise at customer sites.

* Identifying technical risks and proactively improving the codebase, development practices, and system architecture.

* Contributing to internal tooling and engineering processes to improve team productivity and software quality.

* Mentoring engineers through code reviews, knowledge sharing, and technical guidance.

* Collaborating with Product and Engineering teams to deliver robust, scalable, and maintainable solutions.

Our tech stack includes **Python, ElasticSearch, Kafka, and Kubernetes**!

***About you***

**Hard Skills**

\* Degree in engineering, computer science or similar technical field,

\* **At least 4 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.

**Soft skills**

* **Problem solver:** You have strong analytical skills, you are creative, and you love solving complex problems,

* **Collaborative Team Player**: You excel in collaborative environments, valuing teamwork and the collective achievement of goals,

* **Independent Contributor:** You thrive in autonomy, demonstrating the ability to take ownership of projects and tasks. Your self-motivation allows you to navigate and excel in tasks with minimal supervision.

***About us***

*Our office and Team Life:*

* Offices located **in the heart of Paris**, near Bourse (75002),

* **High-quality equipment** based on preferences and needs (PC, Mac, additional screens, etc.),

* Thanks to our Office Manager, we regularly organize events such as seminars, happy hours, themed evenings, and more,

* An **onboarding process** to welcome each new colleague with an explanation of the roles and a mentor to support you during your early days!"

* A great team that always seeks to improve their skills

*And more:*

* An **attractive package**: Base salary (63000 to 74000 euros) + profit sharing,

* **Flexible remote work**options,

* A **mentor** to guide you throughout your probationary period,

* 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.

***The recruitment process***

* A 30-minutes call with our Talent Acquisition Manager,

* A 30-minutes visio interview with the Hiring Manager,

* A 1 hour on-site interview + 30 minutes with the team for a team fit assessment,

* A psychometric test to assess your motivations and soft skills,

* A final HR video appointment to review your soft skills and motivations.