Senior Penetration Tester

🕒 April 8

🇬🇧 United Kingdom – Remote

⏰ Full Time

🟠 Senior

🔧 QA Engineer (Quality Assurance)

🇬🇧 UK Skilled Worker Visa Sponsor

This company has sponsored UK Skilled Worker visas in the past.

👻 Ghost score 45%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Instil

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2005

💼 Consulting

🏭 Manufacturing

🔒 Cybersecurity

Consulting • Manufacturing • Cybersecurity

Instil is a technology consultancy that helps companies design, build and secure category-defining software. They provide product development and cloud-native engineering, embed cyber security practices to protect products and support compliance, and deliver AI & data services to unlock insights and automation; they also offer accelerated training for developers. Instil focuses on helping other organisations (primarily B2B technology brands) modernise digital experiences and adopt secure, data-driven engineering practices.

📋 Description

• Play a critical role in delivering high-quality penetration testing engagements across infrastructure, cloud, web, and mobile applications. • Identify and remediate security weaknesses. • Contribute to the development of methodologies and mentoring junior testers. • Work on varied, challenging projects in a supportive environment.

🎯 Requirements

• CHECK Team Member (CTM) status • Current UK Security Clearance. • At least 2+ years of penetration testing experience. • Strong experience with web application and network penetration testing methodologies. • In-depth knowledge of operating systems (Linux, Windows, Active Directory). • Familiarity with cloud environments and ability to perform cloud security reviews. • Proficiency with tools such as BurpSuite Pro, Nmap, Nessus, and Kali Linux. • Knowledge of scripting languages (Python, Shell, etc.). • CHECK Team Lead (CTL) status (Infrastructure or Applications) - Nice-to-Have. • Relevant certifications (OSCP, Cyber Scheme) - Nice-to-Have. • Experience with Hack the Box or Capture the Flag simulations - Nice-to-Have.

🏖️ Benefits

• A discretionary annual performance bonus that rewards your impact and contribution to our success. • Flexible working arrangements and summer hours, because life isn’t 9 to 5, and balance matters. • A highly competitive pension scheme with generous employer contributions, private healthcare, and life assurance for peace of mind. • Employee Assistance Programme, mental health support, cycle-to-work scheme, and regular social events to keep our culture vibrant. • 35 days holiday, enhanced maternity pay, and family-first policies so you can focus on what matters most. • From courses to certifications, we’ll invest in your development so you can keep growing and shaping what’s next. • Opportunities to volunteer, give back, and be part of initiatives that make Instil a truly inclusive and connected workplace.