> Markdown version of [/jobs/ext/2817803-senior-penetration-tester-check-flexible-impactful](https://www.wearedevelopers.com/jobs/ext/2817803-senior-penetration-tester-check-flexible-impactful). 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). --- # Senior Penetration Tester (CHECK) - Flexible & Impactful - **Company:** Instil - **Location:** Belfast, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Software System Penetration Testing, Nmap, Strategies of Testing, Cloud Platform System, SC Clearance, Burpsuite - **Published:** September 10, 2026 - **Apply:** https://www.collegerecruiter.com/job/2840587138-senior-penetration-tester-check--flexible--impactful ## About the Role A cybersecurity firm in Belfast is seeking a Senior Penetration Tester to deliver high-quality penetration testing across diverse client systems. The role requires at least 2 years of experience, proficiency in various testing methodologies, and current UK Security Clearance. Ideal candidates will have strong knowledge of cloud environments and tools such as BurpSuite and Nmap. The position offers competitive benefits including flexible working arrangements, a performance bonus, and a strong focus on professional development. #J-18808-Ljbffr ## Related Videos - [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) - [It's a (testing) trap! - Common testing pitfalls and how to solve them](https://www.wearedevelopers.com/videos/1193-it-s-a-testing-trap-common-testing-pitfalls-and-how-to-solve-them) ## 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) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Understanding and Mitigating Common Web Vulnerabilities](https://www.wearedevelopers.com/magazine/565-understanding-and-mitigating-common-web-vulnerabilities) - [The Best Job Search Websites of 2025](https://www.wearedevelopers.com/magazine/368-the-best-job-search-websites-of-2025) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers)