Backend Developer

Technology Partners; Wildwood (MO); On-site; USD 83,000 - 117,000; Full time

Job summary

Technology Partners is seeking an API Developer specializing in C#/.NET and Azure API Management to design, build, and optimize RESTful services for a mobile-facing app. You will refactor legacy endpoints, ensure secure authentication, and collaborate with mobile teams to meet performance and contract requirements.

You will deploy and manage API gateways, integrate CyberSource and Genesis ERP, and implement observability for production APIs.

Qualifications

• 3-5+ years of API development with C#/.NET.
• Strong REST API design and OpenAPI/Swagger knowledge.
• Hands-on experience deploying and managing API gateways (Azure API Management).
• Familiarity with SQL Server and microservices architecture.
• Experience integrating third-party SDKs like CyberSource and Genesis ERP.
• Knowledge of search tools like Typesense or Elasticsearch.
• Excellent troubleshooting, performance tuning, and security implementation skills.
• Bachelor's degree in Computer Science, Software Engineering, or related field.
• High School Diploma or equivalent and a valid Driver's License.

Responsibilities

• Design and develop REST API layers to expose microservices (shipping, pricing, cart).
• Deploy and manage API gateways (Azure API Management) for security and routing.
• Refactor legacy endpoints into documented APIs following best practices.
• Collaborate with mobile teams to validate API contracts and performance.
• Troubleshoot performance issues related to pricing, SKU computations, and ERP latency.
• Implement secure authentication transfer between mobile app and identity system.
• Coordinate third-party integrations including CyberSource and Genesis ERP.
• Develop observability and logging within APIs to monitor production app behavior.

Skills

API development (C#/.NET)

REST API design

Azure API Management

SQL Server

Microservices

CyberSource integration

Genesis ERP

OpenAPI/Swagger

Elasticsearch

Troubleshooting

Security best practices

Education

Bachelor's degree in Computer Science or related field

High School Diploma or equivalent + Driver's License

Tools

OpenAPI/Swagger

Azure API Management

SQL Server

Typesense

Elasticsearch

CyberSource SDK

Genesis ERP

Job description

Technology Partners is currently seeking a talented API Developer – C#/.NET and Azure API Management.

Do you have experience designing and implementing REST APIs using C# and .NET, as well as configuring API gateways like Azure API Management?

Let us help you make your next big career move a reality!

What You Will Be Doing

You will join the client's backend development team as an API Developer for a 6-month project. In this role, you will build and refactor core backend services to securely expose microservices to a customer-facing mobile app. You will work closely with mobile developers to ensure APIs meet performance and contract requirements. You will deploy and manage API gateways, refactor legacy services, and address performance bottlenecks to improve overall API functionality. Your work will directly impact the mobile application's reliability, security, and user experience.

Key Responsibilities

• Design and develop REST API layers to expose existing microservices such as shipping, pricing, and cart.
• Deploy, configure, and manage API gateways (Azure API Management or equivalent) for security, request routing, and rate limiting.
• Wrap and refactor legacy endpoints from direct database calls to documented APIs following best practices.
• Collaborate with mobile development teams to validate API contracts and ensure optimal performance.
• Troubleshoot and resolve performance issues related to pricing payloads, SKU computation, and ERP latency.
• Implement secure authentication transfer between the mobile app and the client's identity system.
• Coordinate third-party integrations including CyberSource payment processing and Genesis ERP for order and shipping updates.
• Develop observability and logging mechanisms within APIs to monitor mobile app behavior in production environments.

Required Skills & Experience

• 3-5+ years of experience in API development with C#/.NET.
• Strong knowledge of REST API design and documentation using OpenAPI/Swagger.
• Hands-on experience deploying and managing API gateways such as Azure API Management.
• Familiarity with SQL Server and microservices architecture.
• Experience integrating third-party SDKs, especially CyberSource and Genesis ERP.
• Knowledge of search tools such as Typesense or Elasticsearch.
• Excellent troubleshooting, performance tuning, and security implementation skills.
• Bachelor's degree in Computer Science, Software Engineering, or related field.
• High School Diploma or equivalent and a valid Driver's License.

Desired Skills & Experience

• Experience working in financial or ERP integration environments.
• Certifications related to Azure or API management solutions.
• Exposure to DevOps practices and API observability tools.

Pay:

$59.50 – $85.00 /hr

We are interested in every qualified candidate who is eligible to work in the United States. However, we are not able to provide sponsorship at this time or accept candidates who would require a corp-to-corp agreement.

All offers of employment at Technology Partners are contingent upon clear results of a thorough background check and drug screening that meet corresponding laws and regulations at the city, state and federal level. Pay ranges are influenced by candidate qualifications, experience, and role specifics, with the actual rate determined considering skills, market conditions, and are subject to change by the employer; pay negotiations follow all state and federal legal guidelines.