The Role
The Senior Full Stack Engineer will lead quality engineering efforts, focusing on testing methodologies for AI applications, including humor validation, API testing, and compliance with security standards. Responsibilities include implementing automation frameworks and collaborating across teams to ensure optimal AI performance and production readiness.
Summary Generated by Built In
Requisition Number: 2355284
Optum is a global organization that delivers care, aided by technology to help millions of people live healthier lives. The work you do with our team will directly improve health outcomes by connecting people with the care, pharmacy benefits, data and resources they need to feel their best. Here, you will find a culture guided by inclusion, talented peers, comprehensive benefits and career development opportunities. Come make an impact on the communities we serve as you help us advance health optimization on a global scale. Join us to start Caring. Connecting. Growing together.
Primary Responsibilities:
Required Qualifications:
Preferred Qualifications:
At UnitedHealth Group, our mission is to help people live healthier lives and make the health system work better for everyone. We believe everyone-of every race, gender, sexuality, age, location and income-deserves the opportunity to live their healthiest life. Today, however, there are still far too many barriers to good health which are disproportionately experienced by people of color, historically marginalized groups and those with lower incomes. We are committed to mitigating our impact on the environment and enabling and delivering equitable care that addresses health disparities and improves health outcomes - an enterprise priority reflected in our mission.
Optum is a drug-free workplace. © 2026 Optum Global Solutions (Philippines) Inc. All rights reserved.
Optum is a global organization that delivers care, aided by technology to help millions of people live healthier lives. The work you do with our team will directly improve health outcomes by connecting people with the care, pharmacy benefits, data and resources they need to feel their best. Here, you will find a culture guided by inclusion, talented peers, comprehensive benefits and career development opportunities. Come make an impact on the communities we serve as you help us advance health optimization on a global scale. Join us to start Caring. Connecting. Growing together.
Primary Responsibilities:
- QE & Automation Foundations
- Solid QE fundamentals: test strategy, test planning, defect lifecycle
- Functional, integration, regression testing
- API testing (REST, JSON, Postman)
- Test automation using Python / JavaScript
- CI/CD awareness (Git, pipelines, build verification)
- Log analysis & debugging (CloudWatch / centralized logging)
- Solid QE fundamentals: test strategy, test planning, defect lifecycle
- Conversational AI Testing
- Intent, utterance, slot/entity testing (Amazon Lex or similar)
- Multi turn conversation validation
- Context & session management testing
- Interruptions, re phrasing, intent switching
- Fallback, disambiguation, error handling scenarios
- Voice vs Chat behavior differences (ASR errors, latency, barge in)
- Bot → Agent handoff validation
- Intent, utterance, slot/entity testing (Amazon Lex or similar)
- Agentic AI Testing
- Clear understanding of agentic behavior (plan → reason → act → observe)
- Testing non deterministic responses
- Multi step workflow validation
- Tool / API invocation correctness by agents
- Agent memory & state validation across turns
- Boundary based validation (acceptable vs unacceptable outcomes)
- Guardrail enforcement testing (what agent must NOT do)
- Clear understanding of agentic behavior (plan → reason → act → observe)
- LLM & Prompt Quality Engineering
- Prompt structure understanding (system vs dynamic prompts)
- Prompt regression testing
- Prompt versioning & rollback validation
- Hallucination detection & containment
- Response tone, empathy, policy compliance validation
- Safety, toxicity, and unsafe response testing
- Prompt structure understanding (system vs dynamic prompts)
- Production Readiness & Observability
- AI production defect RCA
- Monitoring AI KPIs:
- Containment rate
- Escalation rate
- Conversation success/failure
- Hallucination incidents
- Latency, retries, throttling, timeout scenarios
- Release readiness sign off for AI systems
- Monitoring AI KPIs:
- AI production defect RCA
- Security, Privacy & Compliance
- PII / PHI masking validation
- Data boundary validation (what is sent to LLM vs retained)
- Prompt leakage risk testing
- Secure handling of logs and conversation transcripts
- Compliance aware test scenarios (healthcare grade rigor)
- PII / PHI masking validation
- Comply with the terms and conditions of the employment contract, company policies and procedures, and any and all directives (such as, but not limited to, transfer and/or re-assignment to different work locations, change in teams and/or work shifts, policies in regards to flexibility of work benefits and/or work environment, alternative work arrangements, and other decisions that may arise due to the changing business environment). The Company may adopt, vary or rescind these policies and directives in its absolute discretion and without any limitation (implied or otherwise) on its ability to do so
Required Qualifications:
- Fulltime Graduation degree
- Skills:
- Advanced AI Evaluation
- LLM as Judge concepts
- Human in the loop evaluation
- Golden dataset creation
- Automated quality scoring frameworks
- LLM as Judge concepts
- Advanced Automation & Scale
- Conversation simulation frameworks
- Synthetic utterance / conversation generation
- Data driven AI test automation
- AI assisted test case generation
- Conversation simulation frameworks
- Platform & Architecture Awareness
- Experience with Agent Orchestrators
- Multi agent coordination testing
- RAG pipeline understanding
- Integration testing across IVR, CRM, backend systems
- Experience with Agent Orchestrators
- Quality Leadership & Collaboration
- Risk based testing mindset
- Ability to challenge product assumptions
- Solid collaboration with Product, AI Engineers, Ops
- Executive ready quality metrics & reporting
- Comfort with ambiguity and evolving AI behavior
- Risk based testing mindset
- Advanced AI Evaluation
Preferred Qualifications:
- Masters in AI / ML, Engineering, Mathematics, Statistics, or a related discipline
- Experience working with cross-functional and distributed teams in a global and diverse environment
- Experience in mentoring, coaching, and developing AI/ML talent
- Experience in establishing and enforcing AI/ML best practices, standards, and ethics
- Experience in Realizing Value from AI/ML products as well as production ready product.
- Proven history of delivering high-impact AI/ML solutions for real-world problems and use cases
- Proven background in healthcare (AI)
- Proven portfolio of AI/ML publications, patents, or awards
At UnitedHealth Group, our mission is to help people live healthier lives and make the health system work better for everyone. We believe everyone-of every race, gender, sexuality, age, location and income-deserves the opportunity to live their healthiest life. Today, however, there are still far too many barriers to good health which are disproportionately experienced by people of color, historically marginalized groups and those with lower incomes. We are committed to mitigating our impact on the environment and enabling and delivering equitable care that addresses health disparities and improves health outcomes - an enterprise priority reflected in our mission.
Optum is a drug-free workplace. © 2026 Optum Global Solutions (Philippines) Inc. All rights reserved.
Skills Required
- Fulltime Graduation degree
- Advanced AI Evaluation skills
- Advanced Automation & Scale capabilities
- Platform & Architecture Awareness
- Quality Leadership & Collaboration expertise
Optum Compensation & Benefits Highlights
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Healthcare Strength — Health coverage offers multiple plan types with employer HSA contributions, in‑network preventive care at 100%, and included 24/7 virtual visits, alongside dental and vision options. This breadth allows predictable copay choices or tax‑advantaged HSA designs to fit different usage needs.
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Retirement Support — Retirement programs include a 401(k) with employer match eligibility and full vesting over time plus an Employee Stock Purchase Plan at a discount. Together these elements support long‑term savings and ownership.
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Parental & Family Support — Family supports include six weeks paid parental leave, paid caregiver leave, adoption assistance, and subsidized Bright Horizons back‑up care. Emotional well‑being resources like a premium Calm subscription and a 24/7 EAP complement these supports.
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The Company
What We Do
Optum, part of the UnitedHealth Group family of businesses, is a global organization that delivers care, aided by technology to help millions of people live healthier lives. The work you do with our team will directly improve health outcomes by connecting people with the care, pharmacy benefits, data and resources they need to feel their best. Here, you will find a culture guided by inclusion, talented peers, comprehensive benefits and career development opportunities. Come make an impact on the communities we serve as you help us advance health optimization on a global scale. Join us to start Caring. Connecting. Growing together. At Optum, we support your well-being with an understanding team, extensive benefits and rewarding opportunities. By joining us, you’ll have the resources to drive system transformation while we help you take care of your future. We recognize the power of connection to drive change, improve efficiency and make a difference in health care. Join a team where your skills and ideas can make an impact and where collaboration is key to creating technology that produces healthier outcomes.
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Optum Offices
Hybrid Workspace
Employees engage in a combination of remote and on-site work.
Optum has three workplace models that balance the needs of the business and the responsibilities of each role. These models, core on‑site (5 days/week), hybrid (4 days/week) and telecommute or fully remote, vary by country, role and location.
Typical time on-site:
Not Specified
