{"id":2586940,"url":"https://alion.io/job/epam-systems-senior-security-test-engineer-a2a","title":"Senior Security & Test Engineer (A2A)","company":{"id":92,"name":"EPAM Systems","domain":"epam.com","url":"https://alion.io/company/epam-systems","size_band":"5000+","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"HeadHunter","truth_index":{"grade":"D","score":45,"open_postings":54,"ghost_share":0.889,"stale_share":0,"repost_share":0.111,"time_to_fill_p50_days":50,"computed_at":"2026-10-15T05:46:00Z"}},"role":"QA","role_family":"QA","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["Vilnius, 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Senior Security & Test Engineer (A2A) to own the security, functional and performance test suites for our A2A gateway, focusing on Cedar policy enforcement and agentic AI threat modeling.\n\nFeel free to work remotely from anywhere across Lithuania or connect with colleagues at our Vilnius and Kaunas offices.\n\nOwn security, functional and performance test suites for the A2A gateway\n\nTest Cedar policy enforcement correctness across LOG_ONLY and ENFORCE modes\n\nConduct trust model gap analysis for non-AgentCore A2A agents\n\nValidate A2A trust model components including OAuth 2.0, signed Agent Cards and JWT validation\n\nEnforce token scope requirements across agent communication channels\n\nDesign functional and security test cases for the A2A platform\n\nExecute performance testing using k6 and Locust\n\nVerify Cedar policy logic including permit/deny correctness and forbid-overrides-permit rules\n\nApply threat modeling practices for agentic AI and LLM systems based on OWASP Top 10 for LLMs\n\nIdentify risks related to excessive agency and tool parameter exfiltration\n\nRequirements\n\n3+ years of experience in security engineering or QA\n\nExpertise in API security testing and performance benchmarking for cloud APIs\n\nSkills in security test design for AI and agent systems beyond REST APIs\n\nBackground in enforcement mechanism design or implementation\n\nProficiency in Python for security test automation\n\nKnowledge of A2A trust model components (OAuth 2.0, signed Agent Cards, JWT validation)\n\nEnglish proficiency at B2 level or higher\n\nNice to have\n\nFamiliarity with multi-agent communication security patterns\n\nUnderstanding of trust model gap analysis for non-AgentCore A2A agents\n\nCompany offers\n\nEngineering Heritage: Best-in-class experts sharing a culture of engineering excellence and tackling complex engineering challenges for over 30 years\n\nAdvanced Tech Stack: Innovative projects where you can apply or enhance your expertise in Cloud, Data, AI, and other emerging technologies\n\nWorld-Class Clients: Work closely with 340+ of the Forbes Global 2000 on creating disruptive solutions that make a global impact\n\nProfessional Growth: Exceptional support for career development with comprehensive resources for upskilling or reskilling in pioneering practices\n\nGenAI Community: Strong AI competencies with 600+ experts across 55+ locations driving GenAI-enabled transformation journeys\n\nEntrepreneurial Culture: If you're passionate and dedicated to improving business transformation, we provide the support you need to bring your ideas to life\n\nHybrid Setup: The flexibility to work from any location in Lithuania, whether it's your home or our dynamic offices in Vilnius and Kaunas\n\nOther Benefits: Additional vacation and trust days, private health insurance, Employee Stock Purchase Plan and 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