Principal, Full Stack Engineer

OVERVIEW

Backed by a major non-profit healthcare consortium, our client is a newly formed, well-funded healthcare technology spin-off on a mission to fix a fundamentally broken industry. We are building the universal operating system for healthcare—an AI-native, event-driven platform connecting payers, providers, and patients. This isn't about maintaining legacy systems; it's about building a disruptive, intelligent data hub from the ground up within a modern, enterprise-scale Microsoft/Azure ecosystem.

As a Principal Engineer within the Commercialization organization, you are building the revenue-generating engine of the company. You will architect the market-facing products, enterprise APIs, and multi-tenant SaaS environments that will convince the largest payers and providers in the country to migrate to our platform.

* Must be eligible to work on W2 without sponsorship. Not eligible for C2C.

• Pay Rate: $85 – $100/hr
• Duration: 6-month contract-to-hire
• Location:
  
  Hybrid; 2x/week in office — San Diego, Long Beach, Sacramento, Rancho Cordova, or Oakland (SF Bay Area)

• Architect & Execute:
  Lead the end-to-end design and hands-on development of complex, cloud-native applications utilizing Azure, .NET Core, and modern JavaScript frameworks (React).
• Establish the Engineering Standard:
  Define, write, and enforce the gold standard for code quality, security (Dev Sec Ops ), and performance. If it isn't automated, it doesn't ship.
• Drive the AI/Cloud
  
  Roadmap:
  
  Integrate emerging technologies, including Azure OpenAI and advanced data streaming layers, directly into the core platform architecture.
• Mentor & Elevate:
  Act as a force multiplier for the engineering organization. Mentor junior and mid-level developers, conduct rigorous code reviews, and transform the team's culture into one of elite execution.
• Infrastructure Ownership:
  Lead the design of CI/CD pipelines and infrastructure-as-code (Terraform/Kubernetes) to ensure secure, zero-downtime, large-scale deployments.
• Architect for Commercial Scale:
  Lead the end-to-end design of our external-facing B2B SaaS platform, ensuring secure, multi-tenant architecture using Azure, .NET Core, and React.
• Enterprise Integration & API Ecosystems:
  Design highly scalable, secure API gateways (integrating tools like Mule Soft) to allow complex enterprise customers to onboard and stream data into our core platform smoothly.

• 10+ years of software engineering experience, with at least 3 years operating as a Staff or Principal-level Individual Contributor.
• Mastery of the Microsoft Stack:
  Deep, battle-tested expertise in C# / .NET Core and the broader Azure cloud ecosystem (AKS, Azure Functions, Azure Service Bus).
• Modern Front-End Expertise:
  Advanced proficiency in React (preferred) or Vue, building highly responsive, scalable user interfaces.
• Cloud-Native & IaC:
  Extensive experience with containerization (Docker, Kubernetes) and Infrastructure as Code (Terraform). You must view infrastructure as software.
• Bonus Points:
  
  Experience integrating Mule Soft, building healthcare-specific compliance systems (HIPAA, SOC
  2), or direct experience deploying LLMs/AI models in production.
• B2B SaaS / Multi-Tenancy Mastery:
  Proven experience building complex, scalable, multi-tenant SaaS products from the ground up. You know how to isolate customer data securely while maintaining a unified codebase.
• Identity & Access:
  Deep understanding of modern identity, auth, and RBAC (Role-Based Access Control) for enterprise applications (OAuth, OpenID Connect, Azure AD).

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status, or other non-merit factor. We are committed to creating a diverse and inclusive environment for all employees.