Senior .NET Backend / API Integration Engineer – Conversational AI Orchestration

Work Setup: To be confirmed (Candidates must initially be amenable to either full onsite or hybrid work)

Work Shift: Mid to Night Shift, with at least 2 hours of daily overlap with US Central Time (CST)

Salary: Up to ₱150,000

Required Experience: Minimum 8+ years (Non-negotiable)

Job Overview

We are seeking an experienced and self-driven Senior .NET Backend / API Integration Engineer to join a healthcare Conversational AI program.

The successful candidate will lead the design, development, and maintenance of backend services and orchestration layers that coordinate provider calls across authentication systems, third-party voice platforms, AI agents, and live-agent escalation.

The ideal candidate must have strong expertise in .NET backend development, API integrations, microservices architecture, and technical leadership, along with exposure to AI-assisted development tools and workflows.

Key Responsibilities

- Lead the technical design and development of backend services and orchestration layers using ASP.NET Core, C#, and Entity Framework.

- Build and maintain orchestration and routing layers that coordinate multiple voice and AI agents, including handoffs within a single call.

- Design, develop, secure, and maintain RESTful APIs for internal and external integrations.

- Integrate third-party conversational AI and voice platforms, contact center/IVR systems, and enterprise healthcare platforms.

- Develop and support API authentication and authorization mechanisms.

- Provide technical leadership, mentor engineers, establish coding standards, and lead code reviews.

- Collaborate with architects on solution design, technical decisions, and project estimates.

- Develop clean, scalable, maintainable, and well-documented code.

- Work closely with Product Owners, QA Engineers, Architects, DevOps teams, and contact center business teams.

- Drive unit testing and continuous integration practices.

- Troubleshoot complex production issues and implement performance improvements.

Required Qualifications

- College graduate.

- Minimum of 8+ years of software development experience using .NET technologies, with a strong backend development focus.

- Hands-on experience with Agile/Scrum and AI-Driven Development Lifecycle (AIDLC), including AI-assisted development tools within a client environment.

- Strong proficiency in C#, ASP.NET Core, Web API, and Entity Framework.

- Extensive hands-on experience in API development, API integration, and microservices architecture.

- Proven experience designing orchestration or routing layers that coordinate multiple services or agents.

- Experience designing and consuming RESTful APIs, webhooks, and real-time or streaming interfaces such as WebSockets.

- Strong understanding of API security standards, including OAuth 2.0, JWT, authentication, and authorization.

- Experience leading or mentoring development teams and taking ownership of technical delivery.

- Basic understanding of AI concepts and AI-powered applications.

- Familiarity with AI-assisted development tools such as GitHub Copilot and Claude.

Nice-to-Have Qualifications

- Experience with contact center or IVR integrations, including call transfers, caller authentication, and live-agent escalation.

- Experience consuming LLM or AI agent APIs and implementing guardrails.

- Familiarity with Azure OpenAI and Semantic Kernel.

- Experience with event-driven integrations using Azure Service Bus, Kafka, or similar technologies.

Important Candidate Requirements

- Minimum 8 years of relevant experience is strictly required.

- Candidates must be open to full onsite or hybrid work arrangements, pending final confirmation.

- Candidates must be amenable to a mid-to-night shift schedule with at least 2 hours of daily overlap with US Central Time (CST).

Interested and qualified candidates are encouraged to apply!