Senior .NET Backend Engineer – AI & API Integration

Location: Eton Centris, Quezon Avenue, Quezon City, Philippines

Work Setup: Full Onsite / Hybrid (Pending Client Confirmation)
Work Schedule: Mid to Night Shift (Minimum 2 hours daily overlap with US Central Time – CST)
Salary: Up to PHP 150,000 per month
Experience Required: Minimum 8+ Years (Mandatory)
Headcount: 1
Employment Type: Full-Time

Job Overview

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

The successful candidate will be responsible for designing, developing, and maintaining backend services, API integrations, and orchestration layers that coordinate provider calls across authentication systems, multiple third-party voice and AI agents, and live-agent escalation workflows.

This role requires strong hands-on expertise in C#, ASP.NET Core, Web API, Entity Framework, microservices, and API integration, along with the ability to provide technical leadership and guide development teams.

Candidates should have experience working in Agile/Scrum environments and be comfortable using AI-assisted development tools within an AI-Driven Development Lifecycle (AIDLC).

Key Responsibilities

1. Backend Development & Architecture

• Design, develop, and maintain scalable backend services using C#, ASP.NET Core, and Entity Framework.

• Own the technical design and implementation of backend services and orchestration layers.

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

• Develop scalable, secure, and high-performance RESTful APIs.

2. API Integration & Orchestration

• Design, develop, and maintain API integrations with internal and external enterprise systems.

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

• Implement call routing, agent hand-offs, and escalation workflows within a single interaction.

• Develop and maintain API authentication and authorization mechanisms.

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

3. Technical Leadership

• Provide technical guidance and mentorship to development engineers.

• Establish coding standards, conduct code reviews, and promote development best practices.

• Collaborate with solution architects on technical designs, estimates, and implementation decisions.

• Take ownership of technical delivery and ensure quality across development activities.

4. Development & Quality Engineering

• Write clean, scalable, reusable, and well-documented code.

• Drive unit testing and continuous integration practices.

• Troubleshoot complex production issues and implement effective solutions.

• Identify opportunities to improve application performance, scalability, and reliability.

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

5. AI-Driven Development

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

• Utilize AI-assisted development tools such as GitHub Copilot and Claude.

• Support integrations with conversational AI and AI-powered applications.

Mandatory Qualifications

• Bachelor's degree or equivalent college graduate qualification.

• Minimum 8+ years of software development experience, primarily focused on .NET backend technologies.

• Hands-on experience working in Agile/Scrum environments and AI-Driven Development Lifecycle (AIDLC).

• Strong proficiency in:

  • C#

  • ASP.NET Core

  • .NET Web API

  • Entity Framework

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

• Proven experience designing orchestration or routing layers to coordinate multiple services or agents.

• Experience designing and consuming RESTful APIs, webhooks, and real-time/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 managing technical delivery.

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

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

Good to Have / Preferred Skills

• Experience integrating contact center or IVR platforms.

• Knowledge of call transfers, caller authentication, and live-agent escalation workflows.

• Experience consuming LLM or AI agent APIs.

• Exposure to Azure OpenAI and Semantic Kernel.

• Understanding of AI guardrails and conversational AI integration.

• Experience with event-driven architecture and integration tools such as:

  • Azure Service Bus

  • Apache Kafka

  • Similar messaging and event-streaming technologies.

Work Requirements

• Willingness to work from Eton Centris, Quezon City.

• Must be amenable to a full onsite or hybrid work arrangement, subject to client confirmation.

• Must be comfortable working mid to night shifts.

• Must be able to maintain at least 2 hours of daily overlap with US Central Time (CST).

Salary & Benefits

Salary: Up to PHP 150,000 per month.

Final compensation will depend on the candidate's technical expertise, relevant experience, current compensation, and salary expectations.

Recruitment Process

1. Paper Screening

2. Level 1 Interview

3. Client Interview

Initial Screening Questions

Interested candidates will be requested to provide the following information:

1. What is your highest educational attainment?

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

3. How many years of experience do you have in software development using .NET technologies, 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. On a scale of 1–10, how would you rate your proficiency in C#, ASP.NET Core, Web API, and Entity Framework?

6. What is your current or last drawn salary?

7. What is your expected monthly salary?

8. Are you amenable to working in a full onsite or hybrid setup at Eton Centris, Quezon City, with a mid to night shift schedule?

9. When would you be available to start if selected?

Interested candidates with strong .NET backend development, API integration, microservices, and conversational AI orchestration experience are encouraged to apply.