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 a focus on mentoring and continuous learning.
- 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 Chesterfield employer: Oscar Associates (UK) Limited
Join a pioneering UK technology company that is redefining digital identity and biometric security, where your expertise as an Offensive Security Engineer will be valued and impactful. With a hybrid working model, a culture that fosters innovation and collaboration, and ample opportunities for professional growth, you will thrive in an environment that encourages continuous learning and development. Enjoy the unique advantage of working at the forefront of mobile security, tackling real-world challenges while being part of a dynamic team dedicated to excellence.
Contact Details:
Oscar Associates (UK) Limited Recruitment Team
StudySmarter Expert Advice🤫
We think this is how you could land Offensive Security Engineer (Mobile) in Chesterfield
✨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 app 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 and problem-solving skills during interviews.
✨Tip Number 4
Don’t forget to apply through our website! We’re always on the lookout for talented individuals like you. Plus, it’s a great way to ensure your application gets the attention it deserves.
We think you need these skills to ace Offensive Security Engineer (Mobile) in Chesterfield
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 relevant projects and achievements!
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 personal stories that connect your experience to the role.
Showcase Your Technical Skills:When applying, make sure to mention specific tools and techniques you’ve used in your previous roles. We’re particularly interested in your experience with Android and iOS security, so highlight any relevant projects or challenges you've tackled.
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 us 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. Practise using them on real-world scenarios so you can confidently discuss your experience and how you've applied these tools in past projects.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific challenges you've faced in offensive security, especially around mobile application testing. Think of examples where you identified vulnerabilities and how you approached fixing them. This will demonstrate your analytical thinking and hands-on experience.
✨Stay Updated on Emerging Threats
Research the latest trends in mobile security and be ready to talk about them. Understanding current threats, like biometric spoofing or API abuse, shows that you're proactive and passionate about the field, which is crucial for this role.
✨Communicate Clearly and Effectively
Practice explaining complex security concepts in simple terms. You'll likely need to collaborate with engineering teams, so being able to convey your findings clearly is essential. Prepare a few examples of how you've communicated technical issues in the past.
