The Role
The Senior Backend Developer will design and deliver scalable backend services using .NET, lead technical direction, ensure system performance, and mentor other engineers.
Summary Generated by Built In
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
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
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
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
About
Newfire Global Partners is a leading custom software development company that specializes in working on complex problems. With a strong focus on meeting the unique needs of each organization, they connect clients with local leaders and trusted remote teams to deliver exceptional IT services and software development solutions. Their range of expertise spans various domains, including Data & Analytics, AI/ML, Software Engineering, Product Management, and Marketing. By leveraging recent innovations in artificial intelligence, Newfire Global Partners ensures that their clients can transform the new normal into a competitive advantage. Through their advisory services, experienced leaders guide businesses through transformations and de-risk operations throughout the entire lifecycle. They also offer talent augmentation, bringing together highly skilled professionals from multi-disciplinary teams to support software, product, and marketing needs. Newfire Global Partners is committed to providing excellent service and driving client growth. Their team of industry experts works closely with organizations, whether it's driving transformation, building from scratch, or getting things done efficiently. Trusted by VC & PE firms, established businesses, and startups, Newfire Global Partners is proud to be a reliable partner in various industries, including healthcare, enterprise, and fintech. Partner with Newfire Global Partners today and unlock the expertise that accelerates success.
Skills Required
- 5+ years of backend engineering experience
- Expert-level proficiency in C#, .NET, and ASP.NET Core
- Strong experience with Entity Framework Core and LINQ
- Extensive experience with relational databases (MSSQL)
- Hands-on experience with message brokers such as RabbitMQ
- Strong proficiency in RESTful API design
- Extensive experience integrating with Salesforce APIs
- Strong understanding of API security
- Strong experience with Azure, AWS, or Google Cloud
- Proven experience building and maintaining CI/CD pipelines
- Strong experience with unit and integration testing
- Strong English communication skills
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The Company
What We Do
Newfire Global Partners is a technology and advisory firm founded in 2016. They specialize in software development, staff augmentation, and strategic advisory services, helping organizations navigate digital transformation. Their work spans high-impact industries, with a particular emphasis on digital healthcare, fintech, and cybersecurity. They focus on solving complex challenges through product-led thinking, business strategy, and the practical application of AI to drive measurable growth and operational success.
