Senior .NET Backend – Conversational AI

Position Summary

We are looking for an accomplished Senior .NET Backend / API Integration Engineer to drive the engineering and integration of backend solutions for a healthcare Conversational AI initiative.

The role will be responsible for the technical design, development, and maintenance of scalable backend services and orchestration frameworks that facilitate seamless communication between authentication systems, third-party voice platforms, AI agents, and live-agent support channels.

Work Location: Eton Centris, Quezon Avenue, Manila
Work Arrangement: Subject to confirmation – Candidates must be open to either a full onsite or hybrid setup.
Work Schedule: Mid to Night Shift, with a minimum of 2 hours of daily overlap with US Central Time (CST).
Salary Package: Up to PHP 150,000
Required Experience: 8+ years (Mandatory)

Principal Responsibilities

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

• Design and implement robust orchestration and routing frameworks to coordinate multiple conversational AI and voice agents, including dynamic handoffs within a single interaction.

• Develop, integrate, secure, and maintain RESTful APIs and microservices across internal and external enterprise platforms.

• Establish integrations with third-party conversational AI solutions, voice technologies, contact center/IVR systems, and healthcare applications.

• Implement and maintain API authentication, authorization, and security protocols.

• Provide technical direction to development teams through mentoring, code reviews, engineering standards, and delivery oversight.

• Collaborate with Solution Architects on technical architecture, solution design, implementation strategies, and project estimates.

• Partner with Product Owners, QA, DevOps, Architects, and business stakeholders to ensure successful solution delivery.

• Promote engineering excellence through unit testing, continuous integration, maintainable code, and performance optimization.

• Investigate complex production issues and implement sustainable technical improvements.

Essential Qualifications

• Bachelor's degree or college qualification in a relevant discipline.

• Minimum of 8 years of professional software development experience, with substantial expertise in .NET backend engineering.

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

• Practical experience working within Agile/Scrum environments and AI-Driven Development Lifecycle (AIDLC).

• Experience leveraging AI-assisted engineering tools within software development workflows.

• Strong hands-on background in API engineering, enterprise integrations, and microservices architecture.

• Demonstrated experience designing orchestration or routing solutions involving multiple services, systems, or AI agents.

• Proficiency in RESTful APIs, webhooks, WebSockets, and real-time or streaming communication interfaces.

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

• Proven technical leadership experience, including developer mentoring, code governance, and ownership of technical delivery.

• Foundational knowledge of AI-powered applications and development tools such as GitHub Copilot and Claude.

Advantageous Experience

• Integration with contact center and IVR platforms, including call routing, call transfers, caller authentication, and live-agent escalation.

• Experience consuming and integrating LLM and AI agent APIs.

• Familiarity with Azure OpenAI, Semantic Kernel, and AI guardrail implementation.

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