Penetration Tester

Salary: £35,000-£55,000

Department: Break

About Us

OnSecurity builds technology that makes tech businesses less likely to be targeted by cyber-criminals, and to ensure they are resilient to the inevitable cyber-attacks that will come their way. From our next-generation Pentesting and PtaaS services, to our Scan and Radar products, OnSecurity is a single source of security for modern, tech-enabled businesses.

Job Description

As a penetration tester you will be responsible for conducting Penetration testing projects for OnSecurity’s clients across numerous sectors such as Telecoms, FIntech, Medtech, Retail. You will also assist development of the team through testnet, methodology development.

What you will do:

  • Deliver remote and sometimes onsite penetration testing covering but not limited to:
  • Web application and API penetration testing
  • Infrastructure (External & Internal) penetration testing
  • Mobile web application penetration testing
  • Cloud Audits
  • Help build and maintain the OnSecurity testing network
  • Share knowledge and experience within the testing team
  • Assist with quality assurance of tests

To qualify you will have:

  • Min 2 year’s experience - delivering penetration testing of any discipline, infra, web app, mobile app, social engineering, OSINT.
  • Keen interest in IT security - looking for testers who see IT security and pen testing as a hobby first and a job second.
  • Good technical knowledge - of IT security testing methodologies and technology and also desirable (but not essential) that you have an industry respected qualification (OSCP, CRT, CCT).
  • Team Player – working closely with other testers in the testing team.
  • Coding skills beneficial (Python, Go etc) for tooling/automation development.


  • Competitive salary with regular pay reviews
  • Health Care - All employees provided with Vitality private Health Care.
  • 30 days of holiday - Work hard and play hard, we allow people to take the time they need to succeed in the roles
  • Seasonal company get-togethers - Even though we are a remote-first business, we still like to get everyone together throughout the year
  • Remote first with Bristol HQ - We have an office in Bristol where any employee is welcome, but we allow people to work remotely
  • Flexible working - We trust our employees to deliver their work when's best for them, still ensuring business needs come first

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