Application Security Specialist

We’re Checkout.com. You might not know our name, but companies like eBay, Spotify, Klarna, Uber, and Sony do, because we’re behind many of the digital experiences you use every day. We are where the world checks out, enabling over 10 billion transactions yearly for more than one billion global shoppers. Our platform helps the most ambitious businesses deliver effortless digital experiences, at scale.

As a Junior Application Security Analyst in the Information Security team, you will help secure Checkout.com’s software applications throughout the Secure Software Development Lifecycle (SSDLC). You will work closely with developers and product teams to integrate security early in the development process, identify and oversee the remediation of vulnerabilities, and ensure adherence to secure coding practices and application security standards. This role focuses on practical, hands-on security support while also growing your expertise in application security.

Key Responsibilities

• Assist in integrating security controls into the SSDLC.
• Support the creation and maintenance of secure coding guidelines (e.g., OWASP Top 10, CERT Secure Coding Standards).
• Run Static Application Security Testing (SAST) and Software Composition Analysis (SCA) scans.
• Conduct API security testing.
• Support CI/CD pipelines to keep secure and effective integration.
• Participate in threat modeling sessions.
• Document identified threats, assess risks and provide mitigation recommendations.
• Assist in code and system reviews to analyse security in company’s products.
• Triage and prioritise vulnerabilities from automated scans.
• Track, verify and ensure security flaws remediation.
• Assist to automate an AppSec pipeline.
• Collaborate with engineering teams to integrate security into product design and improve existing systems.
• Help deliver training and awareness on SSDLC best practices and secure coding.
• Contribute to security documentation.

Required Skills & Experience

• 1–3 years in application security, secure software development, or related IT/security role.
• Understand basic network technologies and protocols (HTTP, TCP/IP, DNS and the OSI model).
• Understanding of common software vulnerabilities and their mitigations.
• Basic programming experience in a popular language (e.g., Python, JavaScript, Golang).
• Understanding of CI/CD pipelines and DevSecOps principles.
• Basic understanding of cloud technologies (AWS, GCP or Azure) and GitHub security features.
• Strong attention to detail in documentation and assessments.

Preferred

• Familiarity with SAST/DAST/SCA tools and API security testing platforms.
• Exposure to cloud-native application security (AWS, Azure, GCP).
• Understanding of container security (Docker, Kubernetes).
• Experience of participating in Capture The Flag (CTF) competitions.

Key Competencies

• Eager to learn and expand technical skills in application security.
• Effective communicator with both technical and non-technical audiences.
• Collaborative and proactive problem solver.
• Ability to prioritise work.

We create the conditions for high performers to thrive, through real ownership, fewer blockers, and work that makes a difference from day one. Here, you’ll move fast, take on meaningful challenges, and be recognised for the impact you deliver. It’s a place where ambition gets met with opportunity, and where your growth is in your hands.

We work as one team, and we back each other to succeed. So whatever your background or identity, if you’re ready to grow and make a difference, you’ll be right at home here.

Our hybrid working model offers flexibility, with three days per week in the office to support collaboration and connection.