Offensive Security Engineer (Mobile) in London
Offensive Security Engineer (Mobile)

Offensive Security Engineer (Mobile) in London

London Full-Time 65000 - 75000 £ / year (est.) No home office possible
Oscar Associates Ltd

At a Glance

  • Tasks: Lead mobile security assessments and simulate real-world attack scenarios to identify vulnerabilities.
  • Company: Innovative UK tech company at the forefront of digital identity and biometric security.
  • Benefits: Competitive salary, hybrid working, and opportunities for professional growth.
  • Other info: Collaborative environment with opportunities to mentor and innovate.
  • Why this job: Join a dynamic team and make a real impact in mobile security.
  • Qualifications: 4+ years in offensive security with expertise in mobile application security.

The predicted salary is between 65000 - 75000 £ per year.

We're working with an innovative UK technology company operating at the forefront of digital identity and biometric security. As their security function continues to grow, they're looking to appoint an experienced Offensive Security Engineer with a strong focus on mobile application security.

The Opportunity:

You'll take ownership of sophisticated red team and mobile security assessments across iOS and Android environments, simulating real-world attack scenarios to identify vulnerabilities before they can be exploited. The role combines hands-on offensive testing, exploit development, research into emerging threats, and close collaboration with engineering teams to ensure vulnerabilities are remediated effectively. This position would suit someone who enjoys reverse engineering, breaking mobile protections, and staying ahead of evolving threats in areas such as biometrics, authentication, and device compromise.

Key Responsibilities:

  • Conduct advanced mobile application penetration testing across iOS and Android
  • Perform reverse engineering, runtime manipulation, and instrumentation attacks
  • Simulate realistic adversarial scenarios including:
  • Rooted and jailbroken devices
  • Emulator and Frida-based attacks
  • Certificate pinning bypass
  • Session manipulation and API abuse
  • Biometric spoofing and presentation attacks
  • Identify weaknesses in authentication, cryptographic controls, and mobile architectures
  • Develop proof-of-concept exploits and custom tooling
  • Produce high-quality reports with practical remediation guidance
  • Work closely with software engineers and product teams to validate fixes
  • Research emerging mobile attack techniques and adversarial methods
  • Support improvements to security monitoring and detection capabilities
  • Mentor development teams on secure mobile development practices
  • About You:

    You will have strong experience in offensive security, penetration testing, or mobile security research, with a genuine passion for understanding how complex systems can be attacked and improved.

    Essential Experience:

    • 4+ years in Red Teaming, Penetration Testing, or Mobile Security
    • Deep expertise in Android and/or iOS application security
    • Strong experience with tools such as:
    • Frida
    • Ghidra
    • Hopper
    • IDA Pro
    • Burp Suite
  • Experience analysing APK and IPA binaries
  • Ability to bypass certificate pinning, anti-debugging, and anti-tamper controls
  • Strong understanding of:
    • Android and iOS security models
    • Secure storage (Keychain/Keystore)
    • Cryptographic implementations
    • OAuth and authentication protocols
  • Scripting and automation skills to build custom testing tools
  • Excellent communication skills and the ability to explain findings clearly
  • Desirable:

    • Experience with biometric systems and identity verification technologies
    • Security research background
    • Contributions to open-source tooling or vulnerability research
    • Exposure to threat modelling and secure architecture reviews

    If this sounds like you, apply now or reach out directly.

    Offensive Security Engineer (Mobile) in London employer: Oscar Associates Ltd

    Join an innovative UK technology company at the forefront of digital identity and biometric security, where you will have the opportunity to work in a dynamic hybrid environment that fosters collaboration and creativity. With a strong emphasis on employee growth, you will benefit from mentoring opportunities, cutting-edge projects, and a culture that encourages continuous learning and development in the rapidly evolving field of mobile security. This role not only offers competitive remuneration but also the chance to make a meaningful impact by enhancing the security of mobile applications in a supportive and forward-thinking workplace.
    Oscar Associates Ltd

    Contact Detail:

    Oscar Associates Ltd Recruiting Team

    StudySmarter Expert Advice 🤫

    We think this is how you could land Offensive Security Engineer (Mobile) in London

    ✨Tip Number 1

    Network like a pro! Get out there and connect with folks in the industry. Attend meetups, webinars, or conferences related to mobile security. You never know who might have the inside scoop on job openings or can refer you directly.

    ✨Tip Number 2

    Show off your skills! Create a portfolio showcasing your projects, especially any offensive security assessments you've conducted. This is your chance to demonstrate your expertise in mobile application security and make a lasting impression.

    ✨Tip Number 3

    Prepare for interviews by simulating real-world scenarios. Practice explaining your thought process when tackling mobile security challenges. This will help you articulate your approach during interviews and show that you're ready to hit the ground running.

    ✨Tip Number 4

    Don't forget to apply through our website! We love seeing candidates who are genuinely interested in joining us. Tailor your application to highlight your experience with tools like Frida and Burp Suite, and let us know how you can contribute to our innovative team.

    We think you need these skills to ace Offensive Security Engineer (Mobile) in London

    Offensive Security
    Mobile Application Security
    Red Teaming
    Penetration Testing
    Reverse Engineering
    Runtime Manipulation
    Exploit Development
    Biometric Spoofing
    Certificate Pinning Bypass
    API Abuse
    Frida
    Burp Suite
    Android Security
    iOS Security
    Scripting and Automation

    Some tips for your application 🫡

    Tailor Your CV: Make sure your CV highlights your experience in offensive security and mobile application testing. We want to see how your skills align with the role, so don’t be shy about showcasing your expertise in iOS and Android security!

    Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you’re passionate about mobile security and how your background makes you a perfect fit for our team. Keep it engaging and relevant to the job description.

    Showcase Your Projects: If you've worked on any interesting projects or tools related to mobile security, make sure to mention them! We love seeing practical examples of your work, especially if they demonstrate your skills in penetration testing or reverse engineering.

    Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows you’re keen to join our innovative team!

    How to prepare for a job interview at Oscar Associates Ltd

    ✨Know Your Tools Inside Out

    Make sure you're well-versed in the tools mentioned in the job description, like Frida, Ghidra, and Burp Suite. Familiarity with these tools will not only help you answer technical questions but also demonstrate your hands-on experience.

    ✨Showcase Your Problem-Solving Skills

    Prepare to discuss specific scenarios where you've identified vulnerabilities or developed exploits. Use the STAR method (Situation, Task, Action, Result) to structure your answers and highlight your critical thinking and problem-solving abilities.

    ✨Stay Updated on Emerging Threats

    Research the latest trends in mobile security and be ready to discuss them. Showing that you’re proactive about learning and staying ahead of threats will impress interviewers and show your genuine passion for the field.

    ✨Communicate Clearly and Effectively

    Practice explaining complex security concepts in simple terms. Since you'll need to work closely with engineering teams, being able to communicate your findings clearly is crucial. Mock interviews can help you refine this skill.

    Offensive Security Engineer (Mobile) in London
    Oscar Associates Ltd
    Location: London

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