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

Work Setup: Pending confirmation. Initially ask candidates if they are amenable to a full onsite or hybrid arrangement.

Location: Quezon Avenue, Eton Centris, Manila

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

Relevant Experience: Minimum 8+ years (Non-negotiable).

Headcount: 1

Job Description

Seeking a self-driven Senior .NET Backend / API Integration Engineer to lead the design, development, and maintenance of backend services and orchestration layers for a healthcare conversational AI program.

Primary Responsibilities

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

- Develop and maintain orchestration and routing layers coordinating multiple voice and AI agents.

- Design, secure, and maintain RESTful APIs and third-party integrations.

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

- Implement API authentication and authorization.

- Provide technical leadership, mentorship, coding standards, and code reviews.

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

- Ensure clean, scalable, and well-documented code.

- Collaborate with Product Owners, QA Engineers, DevOps, Architects, and business teams.

- Drive unit testing, continuous integration, and production issue resolution.

Must-Have Qualifications

- College graduate.

- Minimum 8+ years of .NET software development experience, with strong backend expertise.

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

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

- Strong experience in API development, integration, and microservices architecture.

- Proven experience designing orchestration or routing layers.

- Experience with RESTful APIs, webhooks, and real-time interfaces such as WebSockets.

- Knowledge of OAuth 2.0, JWT, authentication, and authorization.

- Experience leading or mentoring development teams and managing technical delivery.

- Basic understanding of AI concepts and AI-powered applications, including GitHub Copilot and Claude.

Nice-to-Have Qualifications

- Contact center or IVR integration experience, including call transfers, caller authentication, and live-agent escalation.

- Experience with LLM or AI agent APIs and guardrails, such as Azure OpenAI and Semantic Kernel.

- Event-driven integration experience using Azure Service Bus, Kafka, or similar technologies.