Infosum is looking for a Junior Application Security Engineer with a keen interest in application and cloud security. This role is perfect for someone early in their career who wants to develop hands-on experience in securing SaaS platforms. You’ll be supported by senior engineers while learning how to test applications, uncover vulnerabilities, and embed secure-by-design practices into products.

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

What you’ll do

• Assist with application security testing across web apps, APIs, and cloud infrastructure.
• Support penetration testing and help document findings and recommendations.
• Work closely with developers to learn how to identify and remediate security issues.
• Contribute to threat modeling and risk assessments under the guidance of senior engineers.
• Gain practical experience with security testing tools and automation.
• Stay up to date with emerging application and cloud security threats and share insights with the team.

Requirements

What we’re looking for

• Some exposure to application or cloud security (through university, training or internships).
• Familiarity with common security issues (e.g., OWASP Top 10, API security basics).
• Interest in coding or ability to read code.
• Strong willingness to learn and a proactive mindset.
• Good communication skills and enthusiasm for collaboration.

Nice to have (advantageous)

• Coding experience with Go and/or Node.js.
• Cloud certifications (AWS, Azure, or GCP).
• Experience with security testing tools (SAST, DAST, or similar).

Benefits

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.