Senior Backend Developer (.Net)

Region: APAC

Country: Malaysia, India, Indonesia, and Philippines

Type: Fully remote

What's the Project?

Our client is a leader in providing affordable health care to a wide array of patients. You will work on a web application that will serve patients’ needs, allow them easier and faster access to necessary healthcare treatments, and speed up the process of approving healthcare insurance. Besides technical challenges laid in front of you, you will also work on a project with a significant social impact.

We are looking for a Senior Backend Engineer with a strong command of the .NET ecosystem and a proven ability to design and deliver scalable, cloud-native systems.
This role is not just about building features. You will take ownership of backend systems end-to-end — from architecture and design to production reliability and performance. You will drive technical direction, influence engineering standards, and ensure backend systems deliver real business impact

You’re a perfect match if you have:

5+ years of backend engineering experience with demonstrated ownership of systems.
Expert-level proficiency in C#, .NET, and ASP.NET Core, including designing and building Web APIs and Minimal APIs.
Strong experience with Entity Framework Core and advanced LINQ.
Extensive experience with relational databases (MSSQL), including performance tuning and query optimization.
Hands-on experience with message brokers such as RabbitMQ for building event-driven and asynchronous systems.
Deep experience designing and implementing complex system integrations across multiple platforms.
Strong proficiency in RESTful API design, API versioning, and contract management.
Extensive experience integrating with Salesforce APIs, including object modeling, data synchronization, workflow automation, and heavy third-party system integration scenarios.
Strong understanding of Salesforce data structures, including standard and custom objects, relationship mapping, authentication flows, and API limitations.
Strong understanding of API security, including OAuth flows, token management, rate limiting, access control, secure data exchange, and data protection strategies.
Strong experience with Azure (preferred), AWS, or Google Cloud.
Experience with Docker and cloud-native services such as App Services, Functions, and related platform capabilities.
Proven experience building and maintaining CI/CD pipelines using Azure DevOps, GitHub Actions, or Jenkins.
Strong experience with unit and integration testing (xUnit, NUnit, or similar).
Deep understanding of authentication and authorization (OAuth, OpenID Connect, JWT).
Strong English communication skills (upper-intermediate or higher).
Availability to work Eastern Standard Time (EST) from 8:00 AM to 12:30 PM

Nice to have:

Experience integrating with healthcare platforms such as Athenahealth.
Familiarity with healthcare data standards, payer/provider workflows, or regulated environments.
Familiarity with Infrastructure as Code using Terraform, ARM, or Bicep

Your day-to-day activities:

Own the design, architecture, and delivery of backend services and APIs using C# and .NET
Drive backend technical direction, including service design, data modeling, and infrastructure decisions
Ensure production reliability through monitoring, alerting, debugging, and incident resolution
Design systems that are scalable, maintainable, and aligned with business goals
Collaborate with frontend engineers and product stakeholders to deliver end-to-end solutions
Lead code reviews and enforce engineering best practices across the team
Mentor engineers and elevate overall team capability and standards
Identify and resolve performance bottlenecks and system inefficiencies
Contribute to and improve CI/CD pipelines and deployment processes
Actively participate in architectural discussions and technical roadmap planning
Own services in production, including monitoring, alerting, and incident response

Ready to dive in?

Sarah Chin
Recruiter

Asia/Kuala_Lumpur

sarah.chin@newfireglobal.com

Hiring Process

Here's what you can expect during our hiring process.

Stage 1

Shortlist

Stage 2

Interview

Stage 3

Technical Interview

Stage 4

Client Interview

Stage 5

Offer Stage

1 of X

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Please specify only the years of experience relevant to similar positions, not your total professional experience. What is your English proficiency level? *
At Newfire, we only hire professionals who can communicate clearly and effectively with native English speakers in meetings, emails, and chat. Your English skills will be assessed during the initial interview.Basic (A1–A2) – Can understand and use some familiar words and very basic phrases. Very limited ability to communicate. Intermediate (B1) – Can deal with some daily situations. Limited ability to communicate in English. Advanced (B2–C1) – Can interact with a degree of fluency and spontaneity in a professional environment. Able to produce clear, well-structured language on complex subjects. Fluent / Native (C2) – Can express themselves effortlessly in all types of communication, including nuanced and abstract language. Comparable to native-level proficiency.

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