Senior .NET Developer

Zip Zap IT Solutions is seeking a Senior .NET Developer to support the continued enhancement, modernization, deployment, and operational support of the USDA APHIS Wildlife Services Operations and Reporting System (OARS). OARS includes a custom desktop web application hosted in Microsoft Azure, a service-layer microservices architecture, an API gateway, Azure SQL Database-as-a-Service, and integrations with Esri and external data sources. The developer will contribute to new functional capabilities and non-functional requirements while helping maintain a secure, scalable, reliable production system.

Key Responsibilities

· Develop, enhance, integrate, test, deploy, and maintain OARS application functionality and services in the existing Microsoft Azure environment.

· Design, develop, and support service-layer microservices and APIs; maintain interoperability with existing OARS microservices, applications, third-party software, and external data sources.

· Support the OARS API gateway and Azure-hosted architecture, including scalability and reliable operation during peak loads.

· Work with Azure SQL DBaaS and application data interfaces to support storage, retrieval, reporting, and integration requirements.

· Contribute to system design and architecture updates reflecting new features, interfaces, data, and backend connectivity.

· Participate in Agile sprint delivery, including implementation of prioritized requirements, code delivery, peer review, unit and integration testing, and technical documentation updates.

· Support continuous integration, automated functional testing, regression testing, smoke testing, and deployment across development, test, pre-production, and production environments.

· Support release planning and quarterly production releases, including deployment checklists, release documentation, ServiceNow change/release processes, production smoke testing, and issue resolution.

· Implement and maintain security-related application changes in support of mandatory MFA and FedRAMP Moderate security controls; contribute to updated security documentation and ATO-related artifacts as assigned.

· Support performance, load, stress, vulnerability, and security testing activities and remediate identified application issues.

· Contribute to OARS production support, including Tier 3 troubleshooting, application monitoring, deployments, routine patching, and resolution of application or system issues.

· Maintain role-appropriate architecture documentation, user guides, training materials, security documentation, and final release package materials.

Required Qualifications

· Demonstrated professional experience developing and enhancing .NET applications in a production environment.

· Hands-on experience designing, developing, or maintaining microservices and APIs.

· Experience working in Microsoft Azure environments.

· Hands-on knowledge of Kubernetes and Azure Kubernetes Service (AKS), consistent with the PWS skill requirement.

· Experience integrating application components and services and troubleshooting distributed application behavior.

· Experience participating in Agile or sprint-based software development and collaborating through development, testing, and release activities.

· Experience creating or maintaining automated tests and supporting continuous integration or automated deployment processes.

· Ability to produce and maintain technical documentation and communicate effectively with technical and program stakeholders.

Preferred / Differentiating Experience

· Experience with Azure SQL DBaaS and API gateway technologies in an enterprise application environment.

· Experience with Esri integrations, geospatial services, or external data-source integration.

· Experience supporting systems subject to FedRAMP Moderate or comparable federal security requirements, including MFA, ATO documentation, and vulnerability remediation.

· Experience with application performance engineering, including desktop response-time and API/load testing.

· Experience with legacy data integration or migration, including ETL, data mapping, validation, or importing data from MIS2000 into a modernized application.

· Experience supporting production operations, Tier 3 troubleshooting, monitoring, patching, redundancy, and failover.