Senior Net Backend API Integration engineer- conversational Air ochestration

Job Title: Senior .NET Backend / API Integration Engineer – Conversational AI Orchestration
Work Setup: Pending confirmation - Please initially asked the candidate if they will be amenable for a full onsite or hybrid
Location: Quezon Avenue, Eton Centris, Manila
Work Shift: Mid to Night shift, with at least 2 hours daily overlap with US Central Time (CST)
Salary: Up to 150,000
Relevant years of experience: Minimum 8+ years (non-negotiable)
Headcount: 1

Job Description

We're looking for an experienced, self-driven Senior .NET Backend / API Integration Engineer for a healthcare conversational AI program in Agile / AIDLC working client environment. You'll lead the design, build and maintenance of the backend services and orchestration layer that route provider calls between authentication, multiple third-party voice and AI agents and live-agent escalation.

Primary Responsibilities:

• Own the technical design of backend services and the orchestration layer using ASP.NET Core, C#, and Entity Framework.
• Build and maintain an orchestration and routing layer that manages several voice and AI agents, including hand-offs within a single call.
• Design, develop, secure and maintain RESTful APIs for internal and external integrations.
• Integrate with third-party conversational AI and voice platforms, contact center/IVR systems and enterprise healthcare platforms.
• Develop and support API authentication and authorization
• Provide technical leadership: guide and mentor engineers, set coding standards and lead code reviews.
• Work with Architects on solution design, technical decisions and estimates.
• Write clean, scalable, well-documented code that follows best practices.
• Collaborate with Product Owners, QA Engineers, Architects, DevOps and contact center business teams.
• Drive unit testing and continuous integration practices.
• Troubleshoot and resolve complex production issues and improve performance.

Must Have

• College Graduate
• 8+ years of software development using .NET technologies, with a strong backend focus.
• Hands-on experience with Agile/Scrum and the AI-Driven Development Lifecycle (AIDLC), using AI-assisted tools in the client's environment.
• Proficiency in C#, ASP.NET Core, Web API, and 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 (e.g., 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 – GitHub Copilot, Claude etc..

Nice to Have:
• Contact center or IVR integration experience (call transfer, caller authentication, live-agent escalation).
• Experience consuming LLM or AI agent APIs and applying guardrails (e.g., Azure OpenAI, Semantic Kernel).
• Event-driven integration using Azure Service Bus, Kafka, or similar.

Application Process: Paper Screening → Level 1 Interview → Client Interview

Pre-Screening Notes:
Highest Educational Attainment:
Total years of working experience:
Years of experience in software development using .NET technologies, with a strong backend focus.
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?
Rate your proficiency in C#, ASP.NET Core, Web API, and Entity Framework, from 1 to 10, 10 being the highest.
Last drawn salary
How much is your expected salary?
Are you amenable to working in a full onsite or hybrid setup in Eton Centris, Quezon City with a mid to night shift schedule?
When are you available to start once hired?