About The Role

Claranet Cyber Security is a world class business unit within Claranet, designed to give customers access to market-leading information security services spanning; training, consulting, and managed services. The penetration testing team at Claranet Cyber Security is composed of highly skilled, professional ethical hackers with a real passion for improving our clients’ security posture by demonstrating how systems can be compromised. Team members work on everything from client projects to development work and training, dealing with large corporate penetration tests to gaining credit for published advisories. Our team is growing, and we need inspiring people to join us and help us to continue to build a world leading cyber security operation whilst benefiting from the opportunity to fulfil their potential.



  • Partner with multiple application development teams within client organization, to ensure secure development of applications
  • Develop a broad and deep technical understanding of applications, services and architectures pertaining to the client application organization.
  • Interpret results from exercises such as code review and penetration testing stakeholders, and advise on remediation and mitigation as well as incorporate learnings into future designs
  • Conduct architecture reviews, threat modeling, design reviews, code review on web and mobile applications and web services as and when required
  • Develop documentation, and a knowledge base to be used by developers for implementing secure coding practices
  • Research and maintain knowledge of changing landscape of application security, latest threats, and attacker tools, techniques and procedures
  • Provide recommendations for missing application security controls
  • Support and provide consultation to development teams in the area of application security
  • Occasional travel to client locations might be required

About You

Position specifications

Key Skills and Qualification 

  • Knowledge of common application security flaws, threat modeling, security controls and and common security libraries
  • Understanding of security engineering principles including cryptography, access control, system security, and security operations
  • Experience working with Developer organizations
  • Experience with code scanning (SAST, DAST) tools for C/C++, Java, and Python languages and relevant frameworks.
  • Excellent communication skills (written and verbal) with an ability to explain complex topics in a clear and concise manner to both technical and non-technical audiences
  • Basics to intermediate development and scripting skills in at least one programming language
  • Knowledge of cloud services and cloud security controls
  • Experience with pentesting (plus)
  • Experience with code reviews (plus)

About Us

Claranet combine pioneering technologies, practices, and expertise to propel our customers ambitions. Through a vibrant customer centric culture of collaboration, learning, and opportunity, we nurture a dynamic community of the best technology and service expertise spanning cloud, cyber security, networks, and unified communications.

Founded in 1996, Claranet has evolved into a multi-disciplinary technology services provider with global reach. The company has annualised revenues of circa £350 million, over 6,500 customers, and more than 2,000 employees in nine countries. In the UK we have over 500 staff working in London, Gloucester, Warrington, Bristol, and Leeds, or as homeworkers.  

Claranet consistently appears in The Sunday Times Top Track 250 as one of the fastest growing privately-owned businesses in the UK. Our international success is driven by local service, out of local offices, using a mixture of local and international infrastructure, including hyperscaler clouds.



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