CTI Engineer - Cybersecurity

Company Overview

HarfangLab is a French scale‑up specializing in cybersecurity that develops Endpoint Detection and Response (EDR), Endpoint Protection Platform (EPP), and Attack Surface Management (ASM) 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.

We have raised a total of €30 million, enabling us to strengthen our teams, growing from 40 employees in 2023 to 130 today, and expanding 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, we continue to expand while remaining true to the mission of protecting organizations against increasingly complex cyber threats while enabling clients to retain full control over their data.

Why we’re hiring

The company's growth continues, and our ecosystem of technology partners is expanding day by day. We are receiving more and more requests to integrate our product with other cybersecurity solutions.

What you will do

• Conduct threat intelligence analysis to contribute to the maintenance and enhancement of the product’s detection capabilities.
• Conduct continuous monitoring and threat intelligence analysis.
• Propose and prototype new detection methods / rules to enhance the product’s capabilities.
• Develop internal tools and automation solutions to optimize workflows, accelerate threat intelligence analysis, and improve the team's operational capabilities.
• Take part in communication efforts regarding the current threat landscape.
• Provide support and guidance to specific clients if required.

About you

Soft skills

• You ideally have a strong interest in cybersecurity or related fields.
• You are recognized for your reliability, diligence, and teamwork.
• You are resourceful, curious, able to take initiatives, and can work autonomously.
• You are passionate, enjoy learning, sharing your knowledge with others, and discussing technical topics.

Hard skills

• You are proficient with Python and have good knowledge of Rust/C.
• You have a good understanding of the internals of Windows, Linux, and ideally macOS operating systems.
• Experience in system administration and/or network administration, useful for conducting tests.
• Familiarity with different attack techniques.
• You are fluent in French and English (both written and spoken).
• You are familiar with AI‑powered tools and know how to leverage them effectively to support Cyber Threat Intelligence activities.

Bonus skills

• Reverse Engineering experience.
• Incident Response experience.
• Red Team/Intrusion testing experience.
• Blue Team/SOC experience.

What you can expect from your future team

You will evolve inside a team of 7 people who are very keen to continuously make sure the product is able to efficiently detect cyber threats. Like every team at HarfangLab, we have a lot of autonomy, and we have great confidence in our colleagues. You will also be able to drive your own projects based on your preferences.

About us – Office and Benefits

• Office located in the heart of Paris (75002).
• High‑quality equipment based on preferences and needs (PC, Mac, additional screens, etc.).
• Regular events such as seminars, happy hours, themed evenings, and more.
• Onboarding process with a mentor to support you during your early days.
• Base salary 45 K€ to 57 K€ plus profit sharing.
• Flexible remote work options.
• Health insurance with Alan.
• Meal vouchers via Swile card and discount platform through the works council.
• 7 to 11 additional days off (RTT) per year, in addition to 25 days of paid vacation.
• GymLib subscription, covered 80% by HarfangLab.
• Access to training and events of your choice according to your professional needs.