About Orange Tree Systems

Orange Tree Systems develops healthcare technology and supporting products focused on improving clinical and operational efficiency. We work in a fast-paced environment that values continuous learning, practical problem-solving, and collaboration across teams.

The Opportunity

As a Senior .NET Backend Engineer, you will play a key role in designing, building, and maintaining scalable, high-performance backend systems that support web, mobile, and multi-platform healthcare applications.

You will work closely with cross-functional teams including product, frontend, mobile, and DevOps, contributing to cloud-native backend services, database architecture, API design, and system reliability. This is a hands-on role with exposure to modern backend engineering, Azure cloud services, and DevOps best practices.

What You’ll Do

Backend Engineering

• Design, develop, test, and maintain robust backend services and REST/GraphQL APIs using .NET Core / ASP.NET.
• Build backend systems that support web applications (React/.NET) and mobile clients (iOS, Android, React Native).
• Implement secure authentication and authorization flows using OAuth2, JWT, and identity providers.
• Integrate internal and third-party services, ensuring secure, reliable, and efficient data exchange.

Database Engineering & Data Architecture

• Design and optimize relational databases using SQL Server and PostgreSQL.
• Perform query optimization, indexing, schema design, migrations, and performance tuning.
• Build scalable data models, caching layers, and backend data pipelines as required.

Cloud & DevOps (Azure-Focused)

• Develop cloud-native backend components using:
  • Azure Functions
  • Azure App Service
  • Azure API Management
  • Azure SQL & Azure Database for PostgreSQL
  • Azure Cosmos DB
  • Azure Event Grid / Service Bus
• Contribute to CI/CD pipelines, automated testing, and deployment workflows.
• Implement monitoring, logging, and observability for distributed backend services.

Quality, Collaboration & Operations

• Apply best practices in clean code, testing, documentation, and performance optimization.
• Participate in code reviews, architectural discussions, and design decisions.
• Debug production issues, investigate system failures, and propose long-term solutions.
• Collaborate with Product, Design, Frontend, Mobile, and Platform teams to deliver business-critical features.

Technology Stack

• Backend: .NET Core, ASP.NET MVC, Web API
• Languages: C#, exposure to Java, Node.js, or Python is a plus
• Databases: SQL Server, PostgreSQL, Azure Cosmos DB
• ORM: Entity Framework
• Cloud: Microsoft Azure (primary)
• DevOps: Docker, Kubernetes, CI/CD pipelines
• Frontend (Exposure): Angular or React
• Architecture: Microservices, event-driven systems

What We’re Looking For

• Problem Solver: Designs secure, efficient, and scalable backend systems.
• Collaboration: Works effectively with cross-functional teams.
• Adaptability: Willing to learn and apply new tools, frameworks, and cloud services.
• Attention to Detail: Writes clean, testable, and maintainable code.
• Ownership: Takes responsibility for deliverables, deadlines, and system quality.

Background & Qualifications

• BS/MS in Computer Science, Software Engineering, or a related field.
• 5+ years of hands-on backend engineering experience, with strong focus on .NET technologies.
• Strong proficiency in C#, ASP.NET Core, and RESTful API development.
• Solid experience with SQL Server and PostgreSQL, including schema design and performance tuning.
• Hands-on experience with Azure cloud services and cloud-native backend development.
• Understanding of microservices, event-driven architecture, and distributed systems.
• Experience with CI/CD pipelines, version control, and automated testing.
• Exposure to Docker and Kubernetes is a plus.
• Experience in healthcare systems (EHR/EMR, HL7, FHIR) is a strong advantage.

Why Join Orange Tree Systems

• Work on meaningful healthcare technology with real-world impact
• Collaborate with a fast-growing, highly skilled engineering team
• Gain deep exposure to Azure, scalable backend systems, and modern DevOps
• Opportunity to influence architecture, performance, and long-term platform direction