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 Sheffield employer: Oscar Associates (UK) Limited
Join a pioneering UK technology company that champions innovation in digital identity and biometric security, offering a dynamic work environment where your expertise as an Offensive Security Engineer will be highly valued. With a strong emphasis on employee growth, you will have the opportunity to engage in cutting-edge projects, collaborate closely with engineering teams, and mentor others while enjoying the flexibility of hybrid working arrangements. This role not only allows you to push the boundaries of mobile application security but also positions you at the forefront of emerging threats in a supportive and forward-thinking culture.
Contact Details:
Oscar Associates (UK) Limited Recruitment Team
StudySmarter Expert Advice🤫
We think this is how you could land Offensive Security Engineer (Mobile) in Sheffield
✨Tip Number 1
Network like a pro! Get out there and connect with folks in the industry. Attend meetups, conferences, or even online webinars. The more people you know, the better your chances of landing that dream job.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your mobile security projects, red teaming experiences, or any cool exploits you've developed. This will give potential employers a taste of what you can do.
✨Tip Number 3
Practice makes perfect! Keep honing your skills with hands-on labs and challenges. Websites like Hack The Box or TryHackMe are great for sharpening your offensive security techniques.
✨Tip Number 4
Apply through our website! We’re always on the lookout for talented individuals like you. Don’t hesitate to submit your application directly and let us help you take the next step in your career.
We think you need these skills to ace Offensive Security Engineer (Mobile) in Sheffield
Some tips for your application 🫡
Tailor Your CV:Make sure your CV highlights your experience in offensive security and mobile application security. We want to see how your skills align with the role, so don’t be shy about showcasing your expertise in red teaming and penetration testing!
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. We love hearing about your experiences and what drives you in this field.
Showcase Your Projects:If you've worked on any relevant projects or have contributions to open-source tools, make sure to mention them! We appreciate candidates who can demonstrate their hands-on experience and creativity in tackling security challenges.
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 on joining our innovative team!
How to prepare for a job interview at Oscar Associates (UK) Limited
✨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 passion for the field.
✨Communicate Clearly and Effectively
Practice explaining complex security concepts in simple terms. Since you'll be working closely with engineering teams, being able to communicate your findings clearly is crucial. Consider doing mock interviews to refine this skill.
