Lead Software Engineer, Agentic AI Systems

At Collective Health, we’re transforming how employers and their people engage with their health benefits by seamlessly integrating cutting-edge technology, compassionate service, and world-class user experience design.

The Claims AI Automation team is currently evolving from traditional rule-based adjudication to an intelligence-driven platform. We are seeking a Lead Software Engineer who excels at high-level technical execution. This role is focused on the development and delivery of our Agentic AI strategy, turning architectural blueprints into production-ready systems.

The ideal candidate will be the primary engine for building Python-based AI agents using the Google Cloud (GCP) ecosystem to automate complex claims workflows. You will be responsible for implementing sophisticated LLM behaviors using Gemini.

• Execute Agentic Workflows:
  Build and deploy sophisticated AI agents using Google Vertex AI and the Google Agent SDK (ADK) based on provided architectural specifications.
• Develop and optimize agent behaviors using Gemini (Pro/Flash) with a focus on reliable tool-calling and multi-step reasoning; implement RAG and grounding strategies to ensure AI agents provide factual, data-driven responses derived from internal claims databases and policy documents.
• Design and implement complex system instructions, few-shot prompting, and Chain-of-Thought reasoning to ensure agents handle claims logic with high precision, performing Supervised Fine-Tuning on Gemini models to improve domain-specific performance in adjudication and medical coding.
• Data & Messaging:
  Expert in SQL/PostgreSQL/AlloyDB/Big Query. Understand architectural decisions and actively drive reusable patterns for cloud-native, AI-enabled backend systems.
• Design and implement Stateful Orchestration patterns that incorporate human review breakpoints, ensuring agents can pause, persist state, and resume workflows after auditor approval.
• Implement Input/Output Guardrails and 'Circuit Breaker' logic to detect and intercept non-compliant agent behavior or toxic/hallucinated outputs in real-time before they reach production databases.
• Ability to implement Google Cloud DLP or similar tools within AI pipelines to ensure PHI (Patient Health Information) is never exposed to the model's training or logs.

• Expert Python Developer
  :
  Exceptional skills in building production-grade applications using frameworks like Lang Chain, Lang Graph, or PydanticAI
  .
• Gemini & Vertex AI
  :
  Hands-on experience building with the Gemini model family and the Google Agent SDK (ADK).
• Vertex AI Mastery
  :
  Deep experience with the Vertex AI Python SDK
  , specifically Reasoning Engine (Runtime),
  Extensions
  , and Function Calling
  .
• Prompt Engineering
  :
  Proven ability to engineer high-performance prompts that mitigate hallucinations and ensure deterministic outputs in regulated environments.
• 8+ years of Full-Stack experience with a heavy focus on backend systems.
• AI-First SDLC
  :
  Mastery of AI-enhanced development tools (e.g.,
  Cursor, Wind Surf, Git Hub Copilot
  ) to drive team velocity.

• Healthcare Data:
  Familiarity with healthcare interoperability standards and claims-related data structures.
• Fine-Tuning Expertise:
  Practical experience in fine-tuning LLMs for specific industry nomenclature or structured output formats.
• Java Proficiency: working knowledge of Java and Spring Cloud, capable of supporting and extending existing microservice architectures.

• AI & LLMs: Gemini, Vertex AI, Google ADK, Python, Lang Chain.
• Existing Backend: Java, Spring Cloud, Spring Boot.
• Data & Messaging: PostgreSQL, Spark, AlloyDB, Big Query
• Infrastructure: GCP (Vertex AI, GKE, Cloud Run), Docker.

This is a hybrid position based out of our Lehi or Plano offices
, with the expectation of being in office at least two weekdays per week.

The actual pay rate offered within the range will depend on factors including geographic location, qualifications, experience, and internal equity. In addition to the salary, you will be eligible for 205,000 stock options and benefits like health insurance, 401k, and paid time…