Application Security Engineer (f/m/x)

Sii Polska; Polska; Hybrid; PLN 80,000 - 110,000; Full time

Job summary

A leading technology company is seeking a talented Security Engineer to join their Application Security team. This hybrid role based in Warsaw involves securing applications through security testing, code reviews, and supporting software development teams. The ideal candidate has over 5 years of experience, strong knowledge of application security vulnerabilities, and proficiency in programming languages such as Java or Python. Excellent analytical and communication skills are essential.

Qualifications

• 5+ years of experience in a Security Engineer or related role.
• Experience as a Software Security Engineer with knowledge of vulnerabilities.
• Proficiency in at least one programming language.

Responsibilities

• Provide expertise on secure development practices.
• Perform security testing and code reviews.
• Onboard applications into security testing tools.

Skills

Secure development practices

Application security vulnerabilities

Programming (Java, JavaScript/TypeScript, Python)

Web technologies and protocols

Analytical skills

Communication skills

Tools

OpenText Fortify

Sonatype NexusIQ

Qualys WAS

Job description

We are seeking a talented Security Engineer to join our client's Application Security team. In this role, you will focus on securing applications through activities such as Static Application Security Testing, web application scanning, and supporting software development teams in addressing security vulnerabilities.

This is a hybrid position based in Warsaw, requiring two days per week in the office.

Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.

Your tasks

• Provide expertise on secure development practices and frameworks
• Perform security testing and code reviews to strengthen software security
• Onboard applications into security testing tools (e.g., OpenText Fortify, Sonatype NexusIQ, Qualys WAS)
• Build or adapt CI/CD pipelines to automate security scans
• Assist development teams with troubleshooting and debugging security issues
• Document recurring issues and update secure coding guidelines

Requirements

• At least 5 years of experience as a Security Engineer or in a related security role
• Proven experience as a Software Security Engineer with strong knowledge of application security vulnerabilities and mitigation techniques
• Proficiency in at least one programming language (Java, JavaScript/TypeScript, or Python)
• Good understanding of web technologies, architectures, and protocols
• Strong analytical, organizational, and communication skills with the ability to work effectively in a team and matrix environment
• Fluency in English and Polish

Nice to have

• Penetration testing experience

Job no. 251229-7FWOG