Cyber Security Test Engineer

Expleo Group

Cyber Security Test Engineer conducting security assessments and vulnerability analysis on wireless devices. Collaborating with teams to enhance security measures and reporting findings to management.

Posted 6/26/2026full-timeBucharest • 🇷🇴 RomaniaMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

Cyber Security

About the role

Key responsibilities & impact

Identify methods to manipulate Remote SIM Provisioning including but not limited to SIM Jacking attack.
Set up a test environment to conduct analysis of the communication between the UE and eNodeB
Perform security assessments on wireless devices to identify potential vulnerabilities.
Identify various methods to circumvent security controls such as authentication mechanism on various wireless devices such as Bluetooth/Wi-Fi, NFC etc.
Capture wireless communications between a smart phone, and Device Under Test (DUT), and identifying ways to impersonate the device.
Attempt to extract and/or capture secret keys exchanged during the authentication between the two wireless devices.
Identify where secret keys are stored persistently upon a successful authentication between two devices.
Identify the type of authentication and security mode BLE peripheral/central and WPA supports
Perform analysis on the secure link during the BLE pairing process and identify potential misconfigurations or security flaws.
Identify and exploiting the vulnerabilities in NFC systems such as a mobile phone used to transmit RF signal to lock/unlock doors.
Capture, decode and/or perform replay/relay attacks against key fobs using SDR and generating test reports, and recommend the appropriate course of action.
Participate in research activities to investigate vulnerabilities, emerging cyber threats, and new technologies.
Prepare and present reports and findings to senior management and Customer, outlining security risks and proposed solutions.
Stay up-to-date with the latest security threats, vulnerabilities, and best practices by being part of the Cybersecurity core team
Lead root cause analysis efforts to investigate process failures, identify the underlying issues, and develop solutions to prevent future occurrences.
Act as the primary point of contact for any inquiries or concerns related to the process or project.
Maintain open and transparent communication with all relevant stakeholders (Arhitects, Developers, Customers, CSMC team), providing regular updates on progress, issues, and successes.

Requirements

What you’ll need

Bachelor’s degree in computer science, information systems or equivalent experience
Security Testing experience.
Technical expertise in various wireless protocols such as GSM, Wi-Fi, Bluetooth, NFC, CAN, UDS and UWB
Ability to perform various types of security tests such as penetration testing, fuzz testing, and evaluating the security requirements for wireless technologies.
Hands-on experience regarding security testing Cellular network, Wi-Fi, BT/BLE, and NFC
CVE and GPS Spoofing knowledge
Experience with scripting and automation tools for collecting and analyzing data
Advance knowledge of LTE, RTP/AVB, WPA2/3, NFC, BT/BLE security features
Experience with wireless specifications for LTE, and Bluetooth.

Benefits

Comp & perks

Benefit Platform
Holiday Voucher
Private medical insurance
Performance bonus
Easter and Christmas bonus
Employee referral bonus
Bookster subscription
7card
Work from home options depending on project.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Remote SIM ProvisioningSIM Jacking attacksecurity assessmentsauthentication mechanismswireless communicationssecret key extractionBLE pairing analysisNFC vulnerabilitiespenetration testingscripting and automation

Soft Skills

communicationreport preparationstakeholder managementroot cause analysisleadershipresearchproblem-solvingpresentation skillsteam collaborationtransparency