​Quarkslab is a high-end cybersecurity company, highly skilled in vulnerability research and design of security solutions for a tailored level of defense.
Malware are growing faster than one software can analyze: combine all detections together.
Code & Data obfuscation to protect everywhere.
Defensive security
  • Security developments: crypto, protocols, fuzzers, patch system for outdated programs.
  • Cryptography design.
  • On-demand R&D: anti-root, disassembler, custom probes for IRMA.
Offensive security
  • ​Vulnerability, patch and exploit analysis
  • ​Cryptography and DRM pentesting
  • ​Software assessment
  • Reverse engineering
  • Vulnerability research
  • iOS & Android pentesting
​We provide tailored services for profound technical issues to leverage your data protection.
As we work in sensitive environments we do
not disclose our clients’ references.
> ​Multiple CVEs reported to Apple, Adobe, Microsoft, Siemens, Samsung, etc.
> ​Regular speakers in international conferences
eg. HITB, Hack.lu, CSW, PacSec, SSTIC.
> ​Capacity to assess software security certified by ANSSI.
> Open assessment of the Chatsecure application.
​full-time employees
​mainly security
researchers and developers.
thesis in progress
We have 2 positions opened for security researchers. It is time to work in a small but growing start-up based in France.
Reverse engineer

One part of the job is reversing pretty much everything we can, from iMessage to bootloader, mobile application, crypto, kernels, and every piece of software running on a CPU.

The other part of the job is about creating and improving new tools to analyze what is going on on our endpoints, from an ARM DBI to a symbolic execution framework like Triton.

System audits and vulnerability research must be taken to a new stage, as code base is growing faster and faster. New tools need to be designed to help the security researchers in their daily work.

In this job, you will have to audit applications, system components, fuzz, reverse, find clever tricks for both our customers and our own R&D in order to deliver good results.

The candidate can do remote working (only in France). Some travels are then to be expected.

Key Responsibilities
  • Specialized in reverse engineering (x86, ARM, ...), enjoying digging into asm
  • Conduct Operating Systems, applications, protocols and database vulnerability research and assessments
  • Develop internal tools for program analysis
  • Direct contact with customers to fulfill our missions

  • 3+ years of experience in reversing whatever kind of software
  • Autonomous
  • Good writing and speaking skills in English (French useful too)
  • Programming language: Python and C/C++
  • Job is based in France (Paris or not), full time position, remote working in France possible

Contact: send a mail at job-reverse@quarkslab.com.