Application Security Engineer - Infosum (Basingstoke, Hybrid: 2 days onsite)

Infosum is looking for an Application Security Engineer with strong application security testing skills and a solid understanding of cloud environments. In this role, you’ll be hands-on in testing and securing our SaaS platform, working closely with our developers to uncover vulnerabilities and ensure secure-by-design practices are embedded into our products.

This role is based in Basingstoke with two days a week onsite.

What you’ll do

• Perform application security testing across web apps, APIs, and supporting cloud infrastructure.
• Carry out penetration testing and provide clear, actionable vulnerability reports.
• Work closely with engineers (using Go and Node.js) to remediate security issues and integrate security best practices into the SDLC.
• Contribute to threat modeling and risk assessments for new and existing features.
• Develop or adapt security testing scripts and tools to improve automation and coverage.
• Keep up-to-date with emerging application and cloud security threats and share insights with the wider team.
• Evaluate and experiment with advanced security technologies such as Trusted Execution Environments (TEEs).

• Proven experience in application security testing (SAST, DAST, penetration testing).
• Strong understanding of cloud security fundamentals across major providers (AWS, Azure, GCP).
• Ability to code and review code in Go and Node.js.
• Familiarity with common vulnerabilities (OWASP Top 10, API security risks) and secure coding practices.
• Strong communication skills to clearly explain risks and collaborate effectively with developers.

As well as working as part of an amazing, engaging and collaborative team, we offer our staff a wide range of benefits to motivate them to be the best they can be! Here’s an overview of everything we offer right now!

You will receive:

• A competitive salary based on your experience and ability to perform in role
• 25 days annual leave (excluding bank holidays)
• 8% pension contribution
• Private health care via Vitality
• Fantastic corporate discounts and mental wellbeing support via Perkbox, including a top of line EAP.
• Salary sacrifice schemes

We have fantastic offices in Basingstoke and London complete with a fully stocked fridge / snacks and catered lunches 2 times a week.

We also reward our teams with monthly socials, half day Fridays during the summer months of July and August, 3 extra days off during the Christmas holidays and a culture built on recognition, collaboration and success.