Senior Security & Test Engineer - A2A

EPAM Systems; Polska; Hybrid; PLN 210,000 - 320,000; Full time

Benefits offered by this job

Health insurance

Multisport program

Shopping vouchers

Employee stock purchase plan (15% disc

Gift/relocation assistance

Job summary

EPAM Systems is seeking a Senior Security & Test Engineer to secure the A2A gateway within a cloud-native Enterprise Agent Development Platform. You will own security and performance test suites, verify OAuth 2.0 and JWT flows, and conduct threat modeling for AI/LLM agents. Hybrid work with Poland-based teams.

The role emphasizes Cedar policy testing, cross-team collaboration, and delivering a robust security posture for agentic systems.

Qualifications

• 5+ years in security engineering or QA.
• Experience with A2A trust model including OAuth 2.0 and JWT validation.
• Strong automated security testing design and execution skills.

Responsibilities

• Own security, functional and performance test suites for the A2A gateway.
• Validate authentication and authorization flows across agent channels.
• Identify and mitigate security risks in agentic AI and LLM systems.

Skills

Python

Security testing

Performance testing

Cedar policy testing

OAuth 2.0

JWT validation

Threat modeling

Agent security

Tools

k6

Locust

Job description

We are looking for a Senior Security & Test Engineer to join our team building an Enterprise Agent Development Platform, a production-grade cloud-native ecosystem that enables engineering teams to define, orchestrate, deploy and observe AI agents at scale. This role focuses on securing the A2A gateway within a platform that standardizes agent development using LangGraph and Strands Agents on AWS AgentCore Runtime, reducing agent development time from months to days while enforcing consistent security, quality and governance standards.ResponsibilitiesOwn security, functional and performance test suites for the A2A gatewayTest Cedar policy enforcement correctness across LOG_ONLY and ENFORCE modesConduct trust model gap analysis for non-AgentCore A2A agentsDesign and execute functional and security test plans for agentic AI systemsValidate authentication and authorization flows across agent communication channelsIdentify and mitigate security risks specific to agentic AI and LLM-based systemsCollaborate with engineering teams to strengthen the platform's overall security postureReport and track defects, vulnerabilities and performance bottlenecks uncovered during testingRequirements5+ years of experience in security engineering or quality assuranceKnowledge of the A2A trust model including OAuth 2.0 signed Agent Cards and JWT validation with token scope enforcement for agent channelsProficiency in Python for security test automationSkills in functional and security test designExperience in performance testing using k6 and Locust along with performance benchmarking for cloud APIsExpertise in Cedar policy testing including permit/deny correctness forbid-overrides-permit logic and LOG_ONLY vs ENFORCE modeBackground in agentic AI/LLM threat modeling covering OWASP Top 10 for LLMs excessive agency and tool parameter exfiltrationExpertise in API security testingBackground in security test design for AI/agent systems beyond REST APIsExperience in enforcement mechanism design or implementationNice to haveFamiliarity with multi-agent communication security patternsBackground in trust model gap analysis for non-AgentCore A2A agentsWe offerWe gather like-minded people:Top tech minds driving innovation in AI, cloud and digital platform modernizationSupportive team and agile, startup-like cultureHybrid by design mode and opportunity to work remotely within PolandChance to work abroad for up to 60 days annuallyBusiness-driven relocation opportunitiesWe provide growth opportunities:Career development programsThought leadership, mentoring, soft skills and well-being programsCertification (Anthropic, Gemini, GCP, Azure, AWS)English classesWe cover it all:Stable payParticipation in the Employee Stock Purchase Plan with a 15% discountBenefits package (health insurance, multisport, shopping vouchers)Referral bonuses up to $2,000Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and moreCorporate, social and well-being eventsPlease, note:Benefits listed above are available to employees onlyWe are open for working with Contractors. Terms of B2B cooperation agreements are agreed individuallyWe will reach out to selected candidates exclusivelyEPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.