> Markdown version of [/jobs/ext/2812917-penetration-tester](https://www.wearedevelopers.com/jobs/ext/2812917-penetration-tester). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Penetration Tester - **Company:** Bytes Software Services Limited - **Location:** Leatherhead, UK - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Software System Penetration Testing, Cloud Computing, Databases, Mobile Application Software, Red Team (Cyber Security), Web Applications, Cloud Platform System, Vulnerability Analysis - **Published:** September 10, 2026 - **Apply:** https://www.collegerecruiter.com/job/2833343420-penetration-tester ## About the Role * Experience in penetration testing, cybersecurity or security consulting, typically gained over 1-3 years. * Experience delivering penetration testing services or supporting security assessment engagements. * Strong understanding of cybersecurity principles, vulnerability assessment and penetration testing methodologies. * A recognised security certification such as OSCP, GPEN, Security+, CPSA, CEH or CRT. * Excellent verbal and written communication skills, with the ability to communicate technical findings to a variety of audiences. * Strong customer focus and commitment to delivering high-quality outcomes. * Good time management and organisational skills, with the ability to manage competing priorities effectively. * A proactive mindset with a passion for learning, continuous improvement and professional development. * Ability to pass BPSS or HMG Security Clearance requirements. * A collaborative approach with a strong code of ethics, professionalism and integrity. ## Description This role is about more than identifying vulnerabilities. It's about helping customers understand their security risks, strengthen their defences and improve their overall security posture. If you're passionate about cybersecurity and enjoy combining technical expertise with customer engagement, you'll have the opportunity to make a tangible impact while working across a diverse range of penetration testing engagements. Mission This role exists to deliver high-quality penetration testing and security consulting services to a broad range of customers, helping them identify, understand and remediate security weaknesses before they can be exploited. Working as part of a CREST-certified Assurance Testing team, you will perform security assessments across infrastructure, web applications, APIs, cloud environments and other technologies while continuously developing your skills and expanding your expertise. Working closely with team leaders, sales teams and customer stakeholders, you will contribute to successful client engagements while supporting the ongoing growth and development of our Assurance Testing practice., * You will conduct penetration testing engagements across a variety of environments, including infrastructure, web applications, APIs, mobile applications, cloud platforms and red team activities. * You will deliver high-quality testing services that provide meaningful and actionable security recommendations to customers. * You will work closely with the Assurance Testing leadership team on internal projects, research initiatives and service improvement activities. * You will collaborate with sales teams to support the scoping of new opportunities and contribute technical expertise to customer proposals. * You will manage customer engagements to ensure timely delivery and excellent customer outcomes. * You will conduct quality assurance reviews of reports and proposals, ensuring accuracy and adherence to professional standards. * You will contribute to the maintenance and development of the team's vulnerability database, helping keep content accurate and up to date. * You will support account managers and customers during scoping discussions, helping define testing requirements and delivery approaches. * You will share knowledge and provide technical support to colleagues, contributing to a collaborative and supportive team environment. * You will continuously develop your technical capabilities through self-study, certifications, research and on-the-job learning. ## Related Videos - [Kubernetes and Microservices with Multi-Model Databases](https://www.wearedevelopers.com/videos/382-kubernetes-and-microservices-with-multi-model-databases) - [Green Cloud Computing](https://www.wearedevelopers.com/videos/592-green-cloud-computing) - [Generate AI in the Browser with Chrome AI - Raymond Camden](https://www.wearedevelopers.com/videos/1770-generate-ai-in-the-browser-with-chrome-ai-raymond-camden) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Securing Your Web Application Pipeline From Intruders](https://www.wearedevelopers.com/videos/53-securing-your-web-application-pipeline-from-intruders) - [Fault Tolerance and Consistency at Scale: Harnessing the Power of Distributed SQL Databases](https://www.wearedevelopers.com/videos/1146-fault-tolerance-and-consistency-at-scale-harnessing-the-power-of-distributed-sql-databases) ## Related Articles - [The 8 Best Code Testing Tools](https://www.wearedevelopers.com/magazine/402-the-8-best-code-testing-tools) - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [Understanding and Mitigating Common Web Vulnerabilities](https://www.wearedevelopers.com/magazine/565-understanding-and-mitigating-common-web-vulnerabilities) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Events like RSAC Get You CISOs. Developers Decide What Actually Gets Deployed.](https://www.wearedevelopers.com/magazine/693-events-like-rsac-get-you-cisos-developers-decide-what-actually-gets-deployed) - [11 Best Practices For PHP Security](https://www.wearedevelopers.com/magazine/90-11-best-practices-for-php-security)