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Job Title


Junior Application Security Engineer


Company : InfoSum


Location : southampton, south east england


Created : 2025-12-16


Job Type : Full Time


Job Description

DescriptionInfosum 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 doAssist 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.RequirementsWhat we’re looking forSome 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).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!BenefitsA competitive salary based on your experience and ability to perform in role25 days annual leave (excluding bank holidays) + a day off for your birthday + 2 Volunteering daysPrivate medical insuranceLife assurance - 4x your base salaryFantastic corporate discounts and mental wellbeing support, including a top of line EAP.Salary sacrifice schemesEnhanced Maternity, Adoption & Share Parental LeaveWe 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,4pm finishes on a Friday & 3pm Fridays finishes during the summer months of June, July and August, 3 extra days off during the Christmas holidays and a culture built on recognition, collaboration and success.