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

SENIOR .NET BACKEND / API INTEGRATION ENGINEER

Industry: Healthcare / Conversational AI
Salary: Up to PHP 150,000
Work Setup: To be confirmed (Full Onsite or Hybrid)
Work Shift: Mid to Night Shift, with a minimum of 2 hours of daily overlap with US Central Time (CST)
Required Experience: 8+ years (Non-negotiable)
Education: Bachelor's Degree / College Graduate

Job Overview

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

The successful candidate will be responsible for leading the design, development, integration, and maintenance of backend services and orchestration layers that connect authentication systems, third-party voice and AI agents, healthcare platforms, and live-agent escalation systems.

This role requires strong technical expertise in .NET backend development, API integration, microservices architecture, and service orchestration. The ideal candidate should also have experience working in Agile environments and be comfortable using AI-assisted development tools within an AI-Driven Development Lifecycle (AIDLC).

Key Responsibilities

- Lead the technical design, development, and maintenance 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, including seamless handoffs within a single call.
- Design, develop, secure, and maintain RESTful APIs for internal and external system integrations.
- Integrate third-party conversational AI platforms, voice technologies, contact center/IVR systems, and enterprise healthcare applications.
- Develop and maintain API authentication and authorization mechanisms.
- Provide technical leadership, mentor developers, establish coding standards, and conduct code reviews.
- Collaborate with Solution Architects on system architecture, technical decisions, and project estimations.
- Ensure the development of clean, scalable, maintainable, and well-documented code.
- Work closely with Product Owners, QA Engineers, Architects, DevOps teams, and business stakeholders.
- Promote unit testing, code quality, and continuous integration practices.
- Troubleshoot complex production issues, optimize system performance, and ensure backend reliability.

Required Qualifications and Technical Skills

- Bachelor's degree in Computer Science, Information Technology, Software Engineering, or a related field.
- At least 8+ years of professional software development experience using .NET technologies, with a strong focus on backend development.
- Hands-on experience working in Agile/Scrum environments and AI-Driven Development Lifecycle (AIDLC).
- Strong proficiency in C#, ASP.NET Core, Web API, and Entity Framework.
- Extensive experience in API development, system integration, and microservices architecture.
- Proven experience designing and implementing orchestration or routing layers that coordinate multiple services or agents.
- Strong knowledge of RESTful APIs, webhooks, and real-time communication technologies such as WebSockets.
- Solid understanding of API security standards, including OAuth 2.0, JWT, authentication, and authorization.
- Experience leading or mentoring development teams and taking ownership of 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 Qualifications

- Experience integrating contact center or IVR systems, including call transfers, caller authentication, and live-agent escalation.
- Experience consuming Large Language Model (LLM) APIs and AI agent services.
- Familiarity with AI frameworks and platforms such as Azure OpenAI and Semantic Kernel.
- Knowledge of AI guardrails and responsible AI integration practices.
- Experience with event-driven architecture and messaging technologies such as Azure Service Bus, Apache Kafka, or similar platforms.

Work Arrangement and Compensation

- Salary: Up to PHP 150,000, depending on qualifications and experience.
- Work Setup: Subject to confirmation. Candidates must initially be asked whether they are amenable to a full onsite or hybrid arrangement.
- Work Schedule: Mid to Night Shift.
- Time Zone Requirement: Must be available for at least 2 hours of daily overlap with US Central Time (CST).
 Important Candidate Requirement

A minimum of 8 years of relevant .NET software development experience is strictly required and non-negotiable..Candidates who do not meet this experience requirement will not be considered.

Interested and qualified candidates who possess the required technical expertise and leadership capabilities are encouraged to apply.