Hiring: Senior .NET Backend / API Integration Engineer – Conversational AI

Job Overview

We are seeking a highly experienced Senior .NET Backend / API Integration Engineer to lead backend development and integration for a healthcare conversational AI program.

Work Location: Eton Centris, Quezon Avenue, Manila
Work Setup: To be confirmed (candidates must be amenable to either full onsite or hybrid work)
Shift: Mid to Night Shift, with at least 2 hours of daily overlap with US Central Time (CST)
Salary: Up to PHP 150,000
Experience: Minimum 8+ years (Non-negotiable)

Key Responsibilities

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

• Build and maintain orchestration and routing layers that coordinate multiple voice and AI agents.

• Develop, secure, and maintain RESTful APIs, microservices, and third-party integrations.

• Integrate conversational AI, voice platforms, contact center/IVR systems, and healthcare enterprise applications.

• Implement API authentication and authorization mechanisms.

• Provide technical leadership through mentoring, coding standards, and code reviews.

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

• Work closely with Product Owners, QA, DevOps, and business teams.

• Promote clean coding practices, unit testing, and continuous integration.

• Troubleshoot complex production issues and optimize application performance.

Mandatory Qualifications

• College graduate.

• Minimum 8+ years of software development experience using .NET technologies, with strong backend expertise.

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

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

• Extensive experience in API development, integration, and microservices architecture.

• Experience designing orchestration or routing layers that coordinate multiple services or agents.

• Knowledge of RESTful APIs, webhooks, WebSockets, and real-time or streaming interfaces.

• Understanding of API security standards, including OAuth 2.0, JWT, authentication, and authorization.

• Experience leading or mentoring developers and managing technical delivery.

• Basic understanding of AI concepts and AI-powered applications, including tools such as GitHub Copilot and Claude.

Preferred Qualifications

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

• Experience integrating LLMs or AI agent APIs, including Azure OpenAI and Semantic Kernel.

• Familiarity with AI guardrails and secure AI application development.

• Experience with event-driven architecture and messaging platforms such as Azure Service Bus or Kafka.