Security Tester in Watford

At the heart of everything we do is our vision to change lives every day, and our mission to grow The National Lottery responsibly and champion its impact. We are Allwyn UK, part of the Allwyn Entertainment Group – a multi-national lottery operator with a market-leading presence across the USA and Europe. While the main contribution of The National Lottery to society is through the funds to good causes, at Allwyn we put our purpose and values at the heart of everything we do. Join us as we embark on a once-in-a-lifetime, large-scale transformation journey by creating a National Lottery that delivers more money to good causes.

This role provides hands-on security testing across Allwyn's applications, cloud platforms and infrastructure. The main purpose of the role is to improve day-to-day testing coverage across web applications, APIs, backend services, cloud-hosted workloads, internal infrastructure and network-facing services, while supporting findings validation, remediation and retesting. This is an exciting opportunity to work within the national lottery and gain exposure to not just security testing across our technology stack but exposure to supporting both delivery and cyber defence.

What you’ll be doing

• Security testing delivery
  • Deliver security testing across web applications, REST APIs, backend services, cloud-hosted workloads, internal infrastructure and network-facing services.
  • Support testing of AWS and Azure environments, including common configuration weaknesses, access-control issues, exposed services and baseline cloud security concerns.
  • Carry out testing across network and infrastructure layers, including host, service and exposure weaknesses where they affect enterprise risk.
  • Support application-focused testing across web applications, APIs and backend services, including common issues around authentication, authorisation, input validation, session handling and data exposure.
  • Use common security testing and validation tools to support manual testing, verification and basic assessment activity.
• Findings, remediation and incident support
  • Investigate reported vulnerability findings where testing support is needed, help validate whether an issue is genuine, support teams with remediation advice, and retest fixes to confirm they are effective.
  • Support security incidents where testing input is required, including helping assess technical impact, validate weaknesses and support follow-up testing.
  • Produce clear, practical findings and support teams with remediation guidance that can be acted on.
  • Support retesting, evidence collection, findings validation and tracking so that issues can be properly closed out.

What experience we’re looking for

• Essential
  • Hands-on experience in security testing across a mix of application, cloud, infrastructure or network environments.
  • Working knowledge of web application testing, API testing and common backend-service security issues.
  • Working knowledge of common application security frameworks and methodologies, including OWASP Top 10, OWASP API Security Top 10, secure authentication and authorisation patterns, and practical remediation approaches for common web and API weaknesses.
  • Understanding of broader security testing approaches across applications, cloud and infrastructure, including vulnerability assessment, manual verification, configuration review and risk-based testing methods.
  • Working knowledge of AWS and/or Azure, including common configuration and access-control risks.
  • Understanding of network and infrastructure security basics, including exposed services, host weaknesses and common enterprise network risks.
  • Ability to use common testing and validation tools and explain findings clearly.
  • Ability to work with engineering and platform teams to get findings understood, fixed and retested.
  • Familiarity with secure development and review practices, including the ability to support developers with remediation advice and explain issues clearly in the context of software delivery.
• Desirable
  • Experience with containerised workloads and cloud-hosted application platforms.
  • Exposure to mobile application testing or backend-service testing.
  • Experience interpreting SAST or DAST outputs.
  • Familiarity with wider application security references and standards such as OWASP ASVS, CWE, secure coding guidance, and common testing checklists used for web, API and cloud-hosted services.
  • Exposure to threat modelling inputs or secure design review activity, with the ability to use those outputs to help shape testing scope and coverage.
  • Experience in regulated, high-availability or transaction-critical environments.
  • Relevant certifications such as CREST, OSCP or equivalent hands-on experience.

Tools and technologies

The role should be comfortable using a practical mix of testing and validation tools across applications, cloud and infrastructure. This is not intended to be a tool-only role, but the person should be able to work effectively with the kinds of tools commonly used for security testing and validation.

• Burp Suite for web and API testing.
• Kali Linux and common Linux-based testing workflows.
• Nmap, Nessus, Wireshark and similar tools for network, service and infrastructure testing.
• Exposure to tools and outputs used in SAST, DAST and IAST-driven testing.
• Familiarity with cloud and container environments, and the ability to work with outputs from posture, vulnerability or configuration tools used in AWS, Azure and supporting platforms.
• Basic scripting or automation capability, for example in Python, would be useful.

About us

At Allwyn, we are dedicated to changing lives and growing the National Lottery responsibly, championing its positive impact on people, places, and the planet. Innovation - We pride ourselves on it! We’re constantly looking for new ways to excite our customers, bringing new products to market to enjoy which is all supported by our responsible play values and making them accessible to all. Giving back – Did you know that playing the lottery generates around £30m a week for charities and good causes in the UK? Our aim is to have doubled this number by the end of the first 10-year license. Sustainability – Our aim is to become a net zero national lottery. We have 2030 targets to decarbonise our operations and energy. We’ve already transitioned to renewable energy providers, made our London and Watford offices zero gas, and ensured our fleet consists of low-emission vehicles. In addition, we’re working with our value chain partners to develop a net zero target date. Empowering every voice – We believe in creating a culture where everyone feels they belong, can be themselves, has access to opportunities and can thrive for the benefit of good causes. Our diverse teams are working hard to make all parts of The National Lottery inclusive – whether people play a game in a store or online, because when everyone can play, everyone wins.

An inclusive reward offering with wellbeing at the centre. At Allwyn, inclusion is built into how we care for our people. Our benefits and policies support colleagues and their families at every stage of life and career. By prioritising wellbeing and belonging, we create a workplace where everyone feels valued, rewarded, and empowered to succeed. Our people are more than colleagues - they’re winners, driving positive change and making a real difference in communities.

Benefits

• Company Bonus Scheme
• Matched pension contributions up to 8.5%
• 26 days annual leave + 2 Life Days (and bank holidays)
• Single Private Health Cover
• Complimentary Private Medical Income Protection
• Flexible Benefits – EV Scheme, Money Coach, Will Writing, Mortgage Advice, Dental and Eye Care Schemes.
• Enhanced Family Leave (Maternity, Paternity, Adoption)
• Wellness Allowance £500
• Employee Assistance Programme
• Discounted Health Assessments
• Volunteering Days
• Matched Funding

We are a Disability Confident Leader which means we’ve taken proactive steps to ensure our workplace is accessible and inclusive for disabled and neurodivergent colleagues and candidates. As part of this we offer an interview to disabled applicants who meet the essential requirements of the job. If you need any assistance or adjustments to this job description or in the application process, please contact a member of the talent team at careers@allwyn.co.uk and we’ll be happy to help.