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

Location: Quezon Avenue, Eton Centris, Quezon City, Philippines
Work Setup: To be confirmed – Full Onsite or Hybrid (candidate must be amenable to either arrangement)
Work Shift: Mid to Night Shift, with at least 2 hours of daily overlap with US Central Time (CST)
Salary: Up to ₱150,000 per month
Experience Required: Minimum 8+ years (Non-Negotiable)
Headcount: 1

Job Overview

We are looking for a highly experienced and self-driven Senior .NET Backend / API Integration Engineer to support a healthcare Conversational AI program in an Agile and AI-Driven Development Lifecycle (AIDLC) environment.

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

This role requires strong expertise in .NET backend development, API integration, microservices architecture, and service orchestration, along with the ability to provide technical leadership and deliver scalable, secure, and high-performance solutions.

Key Responsibilities

1. Backend Development & Technical Design

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

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

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

• Follow coding standards, architectural best practices, and established development guidelines.

2. API Development & Integration

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

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

• Develop and support API authentication and authorization mechanisms.

• Work with webhooks, real-time interfaces, and streaming technologies such as WebSockets.

• Ensure secure, reliable, and efficient communication between integrated systems.

3. Service Orchestration & AI Integration

• Design and maintain backend orchestration and routing services.

• Coordinate multiple services, voice agents, and AI agents within conversational workflows.

• Support call routing, agent handoffs, authentication, and live-agent escalation.

• Apply basic AI concepts and AI-assisted development tools within the client's development environment.

4. Technical Leadership

• Provide technical guidance and mentorship to development engineers.

• Establish coding standards and lead code reviews.

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

• Take ownership of technical delivery and development quality.

5. Agile Development & Collaboration

• Work in Agile/Scrum and AI-Driven Development Lifecycle (AIDLC) environments.

• Collaborate with Product Owners, QA Engineers, Architects, DevOps teams, and contact center business stakeholders.

• Drive unit testing and continuous integration practices.

• Participate in development planning, technical discussions, and solution reviews.

6. Production Support & Optimization

• Troubleshoot and resolve complex backend and integration issues.

• Investigate production incidents and implement appropriate solutions.

• Improve application performance, reliability, scalability, and maintainability.

• Ensure high-quality delivery across development and production environments.

Mandatory Qualifications

• College graduate; Bachelor's degree or equivalent college qualification.

• Minimum 8+ years of software development experience using .NET technologies, with a strong backend development focus. This is non-negotiable.

• Hands-on experience with Agile/Scrum and AI-Driven Development Lifecycle (AIDLC), using AI-assisted tools in the client's environment.

• Strong proficiency in:

  • C#

  • ASP.NET Core

  • ASP.NET Web API

  • Entity Framework

• Strong 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.

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

• Experience leading or mentoring development teams and owning 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 Skills

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

• Experience consuming LLM or AI agent APIs.

• Familiarity with AI guardrails and frameworks such as Azure OpenAI and Semantic Kernel.

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

Work Arrangement & Availability

• Work location: Eton Centris, Quezon Avenue, Quezon City.

• Work setup is pending confirmation; candidates must initially be asked whether they are amenable to full onsite or hybrid work.

• Mid to night shift schedule.

• Must have at least 2 hours of daily overlap with US Central Time (CST).

Application Process

1. Paper Screening.

2. Level 1 Interview.

3. Client Interview.

Candidate Pre-Screening Questions

1. What is your highest educational attainment?

2. How many total years of professional work experience do you have?

3. How many years of experience do you have in .NET software development, particularly backend development?

4. Do you have hands-on experience with Agile/Scrum and the AI-Driven Development Lifecycle (AIDLC), using AI-assisted tools in the client's environment?

5. Rate your proficiency in C#, ASP.NET Core, Web API, and Entity Framework on a scale of 1–10 (10 being the highest).

6. What was your last drawn salary?

7. What is your expected monthly salary?

8. Are you amenable to working either full onsite or hybrid at Eton Centris, Quezon City?

9. Are you comfortable with a mid to night shift schedule and at least 2 hours of daily overlap with US Central Time?

10. When would you be available to start once hired?

Important Hiring Requirements

• Minimum 8+ years of .NET backend development experience is mandatory and non-negotiable.

• Strong hands-on experience in C#, ASP.NET Core, Web API, Entity Framework, API integration, and microservices is essential.

• Candidates must demonstrate experience in service orchestration or routing across multiple services or agents.

• Prior healthcare conversational AI experience is an advantage but is not explicitly mandatory.

• Candidates must be open to the onsite or hybrid arrangement and the required shift schedule.

Ideal Candidate: A senior .NET backend engineer with strong API integration and microservices expertise, proven orchestration-layer development experience, technical leadership capabilities, and familiarity with AI-assisted development workflows.