Senior / Principal .NET Engineer (Part-Time Contract)

About Inphonite

Inphonite provides automated messaging and communication tools that help healthcare organizations engage patients and streamline operations. Our platform supports appointment reminders, notifications, and multi-channel messaging (voice, SMS, email) used by clinics, hospitals, and healthcare partners across the United States.

We are a small, focused SaaS company where engineers have direct influence on product direction and architecture. Our work sits at the intersection of healthcare workflows, cloud infrastructure, and communication technology.

We are looking for a
senior-level contract engineer

who can contribute not only code, but also
technical leadership, product insight, and architectural direction

as we continue evolving our platform.

Role Overview

We are seeking a
Senior / Principal .NET Engineer (contract)

who is comfortable operating as a
high-impact individual contributor in a small team environment

.

This role requires someone who can:

• Design and implement complex backend systems
• Improve product usability and platform capabilities
• Evaluate and integrate modern technologies (including AI)
• Work independently while collaborating closely with product leadership

You will work directly with leadership to help shape both
technical direction and product capabilities

, not simply execute pre-defined tickets.

This is a
remote, part-time contract role for an experienced engineer who thrives with autonomy and ownership

.

Key Responsibilities

Platform Development & Architecture

• Design, implement, and maintain core platform capabilities using C#, .NET, and Blazor
• Contribute to system architecture decisions affecting scalability, reliability, and maintainability
• Build and maintain APIs and backend services supporting messaging workflows and integrations
• Improve platform performance, observability, and resilience

Communication & Messaging Integrations

• Integrate and optimize communication providers such as Bandwidth, Twilio, or similar CPaaS platforms
• Work with voice, SMS, and messaging infrastructure, including SIP and VoIP concepts
• Implement reliable event-driven workflows for healthcare messaging use cases

Product & User Experience Collaboration

• Work closely with product leadership to translate customer needs and workflow requirements into technical solutions
• Contribute to product design decisions, especially around usability, automation, and operational workflows
• Help evolve features that allow healthcare customers to self-serve messaging and communications

AI & Intelligent Automation

• Explore and implement AI-driven capabilities within the platform, such as:
• Message classification and routing
• Patient response analysis
• Automated workflow triggers
• Intelligent summarization of communications
• Integrate LLM or AI services where appropriate to improve automation, usability, or operational insights

Cloud Infrastructure & DevOps

• Maintain and improve Azure-based infrastructure
• Improve CI/CD pipelines, monitoring, and deployment practices
• Help optimize system performance, reliability, and cloud cost management

Security & Compliance

• Ensure system architecture and implementation support HIPAA compliance and secure handling of healthcare data
• Understand and support telecommunications compliance including TCPA and STIR/SHAKEN

Required Experience

• 7+ years professional software development experience
• Strong expertise in C#, .NET (Core / modern .NET), and backend architecture
• Experience designing and building scalable APIs and distributed systems
• Experience working with cloud platforms (Azure preferred)
• Hands-on experience integrating communication APIs (Twilio, Bandwidth, etc.)
• Strong SQL and database design experience
• Demonstrated ability to work independently and drive projects from concept to production
• Excellent written and verbal communication skills

Highly Valued Experience

• Experience building SaaS platforms or developer-facing APIs
• Experience working in small teams or startup environments
• Familiarity with Blazor or modern web UI frameworks
• Experience with AI / LLM APIs (OpenAI, Azure OpenAI, etc.)
• Experience building AI-powered product features or workflow automation
• Knowledge of SIP, VoIP, or telecommunications systems
• Experience with HL7, FHIR, or healthcare integrations
• DevOps experience with Azure CI/CD pipelines, monitoring, and observability
• Experience improving product usability and workflow design

What We're Looking For

This role is best suited for an engineer who:

• Thinks like a builder and product partner, not just a coder
• Is comfortable making technical and architectural decisions
• Enjoys solving real-world workflow problems
• Can balance pragmatic delivery with long-term system design
• Communicates clearly and works well in a low-bureaucracy environment

Contract Details

• Remote (U.S. based preferred)
• Flexible hours
• Part-time contract
• Opportunity for longer-term engagement based on fit and impact

How to Apply

Interested candidates should submit:

• Resume
• Brief summary of relevant experience
• Examples of systems or products you have built or contributed to
• Experience with communication platforms, healthcare systems, or AI integrations (if applicable)
• Please send materials to:
  careers@inphonite.com