Senior Security & Test Engineer for AI Agent Platform

EPAM Systems; Poland; Hybrid; PLN 180,000 - 240,000; Full time

Job summary

EPAM Systems is seeking a Senior Security & Test Engineer to join our team building an Enterprise Agent Development Platform. This role focuses on securing the A2A gateway within a cloud-native ecosystem on AWS AgentCore Runtime.

You will own security and performance test suites, validate authentication flows, and drive threat modeling for AI/LLM systems, collaborating with engineers to elevate overall security posture. Hybrid work in Poland is available.

Qualifications

• 5+ years of experience in security engineering or quality assurance.
• Strong knowledge of the A2A trust model including OAuth 2.0 signed Agent Cards and JWT validation with token scope enforcement for agent channels.
• Proficiency in Python for security test automation.
• Skills in functional and security test design.
• Experience in performance testing using k6 and Locust along with performance benchmarking for cloud APIs.
• Expertise in Cedar policy testing including permit/deny correctness forbid-overrides-permit logic and LOG_ONLY vs ENFORCE mode.
• Background in agentic AI/LLM threat modeling covering OWASP Top 10 for LLMs excessive agency and tool parameter exfiltration.
• Expertise in API security testing.
• Background in security test design for AI/agent systems beyond REST APIs
• Experience in enforcement mechanism design or implementation.

Responsibilities

• Own security, functional and performance test suites for the A2A gateway.
• Test Cedar policy enforcement correctness across LOG_ONLY and ENFORCE modes.
• Conduct trust model gap analysis for non-AgentCore A2A agents.
• Design and execute functional and security test plans for agentic AI systems.
• Validate authentication and authorization flows across agent communication channels.
• Identify and mitigate security risks specific to agentic AI and LLM-based systems.
• Collaborate with engineering teams to strengthen the platform's overall security posture.
• Report and track defects, vulnerabilities and performance bottlenecks uncovered during testing.

Skills

Python

Security testing

Test design

API security testing

Performance testing

Tools

k6

Locust

Job description

EPAM Systems is seeking a Senior Security & Test Engineer to join our team building an Enterprise Agent Development Platform. This role focuses on securing the A2A gateway within a cloud-native ecosystem on AWS AgentCore Runtime.

You will own security and performance test suites, validate authentication flows, and drive threat modeling for AI/LLM systems, collaborating with engineers to elevate overall security posture. Hybrid work in Poland is available.