Senior Application Security Engineer

We are looking for a Senior Application Security Engineer to reduce security risk across web applications and APIs throughout the software development lifecycle. You will partner closely with engineering teams to assess application security, perform secure design and code reviews, validate and prioritize findings, and drive remediation to closure.

This role focuses on practical application security outcomes: identifying real risk, reducing false positives, and helping teams build and ship secure software efficiently.

Responsibilities

• Perform security assessments of web applications, APIs, services, and supporting components
• Facilitate threat modeling and review architectures and technical designs from a security perspective
• Conduct secure code reviews and identify vulnerabilities and insecure implementation patterns
• Validate findings from automated tools, reduce false positives, and prioritize issues based on exploitability and business impact
• Provide clear, actionable remediation guidance and secure implementation recommendations
• Track findings through remediation and retesting in collaboration with development teams
• Advise teams on authentication, authorization, session management, input validation, data protection, cryptography, secrets handling, and API security controls
• Contribute to secure SDLC practices, security standards, guidelines, and reusable security patterns
• Communicate security risks and recommendations to technical and non-technical stakeholders

Requirements

• Hands-on experience in application security or product security
• Strong knowledge of web application and API security, including OWASP Top 10 and common vulnerability classes
• Practical experience with security assessments, secure design reviews, and/or secure code reviews
• Understanding of threat modeling and secure software design principles
• Strong knowledge of authentication, authorization, session management, input validation, cryptography, secrets handling, and data protection
• Proficiency in English at a B2+ level

Benefits

We gather like-minded people:

• Top tech minds driving innovation in AI, cloud and digital platform modernization
• Supportive team and agile, startup-like culture
• Hybrid by design mode and opportunity to work remotely within Poland
• Chance to work abroad for up to 60 days annually
• Business-driven relocation opportunities

We provide growth opportunities:

• Career development programs
• Thought leadership, mentoring, soft skills and well-being programs
• Certification (Anthropic, Gemini, GCP, Azure, AWS)
• English classes

We cover it all:

• Stable pay
• Participation in the Employee Stock Purchase Plan with a 15% discount
• Benefits package (health insurance, multisport, shopping vouchers)
• Referral bonuses up to $2,000
• Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and more
• Corporate, social and well-being events

Please, note:

• Benefits listed above are available to employees only
• We are open for working with Contractors. Terms of B2B cooperation agreements are agreed individually
• We will reach out to selected candidates exclusively