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Qosina Corp.

Qosina Corp. is hiring: Senior, Backend Web Developer in Ronkonkoma

Qosina Corp., Ronkonkoma, NY, US, 11779

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Job Description

Job Description

Title: Senior Backend Web Developer

FLSA: Exempt

Reports To: Director of Marketing


Position Summary: We are seeking a Senior Backend Web Developer with 7+ years of experience in .NET, C#, and enterprise system integration to support and enhance DynamicWeb-based eCommerce websites while leading the transition to WooCommerce as our long-term eCommerce solution.

The ideal candidate has expertise in backend architecture, API development, cloud services (Azure), and integrations with Microsoft Dynamics 365 Finance & Operations (D365 F&O) and Customer Engagement (D365 CE).

Key Responsibilities

Support & Enhance DynamicWeb Websites (Current State)
  • Maintain, troubleshoot, and enhance existing DynamicWeb-based eCommerce websites.
  • Work with DynamicWeb’s backend (ASP.NET, C#) and Razor templates to develop and optimize eCommerce functionality.
  • Support ERP (D365 F&O) and CRM (D365 CE) integrations for order processing, inventory management, and customer accounts.
  • Optimize SQL Server performance and develop custom stored procedures as needed.
  • Ensure security, compliance, and performance of all backend systems.
Lead the Transition to WooCommerce (Future State)
  • Architect and develop custom APIs, Webhooks, and integrations to facilitate the transition from DynamicWeb to WooCommerce.
  • Build and maintain WooCommerce backend functionality, including:
    1. Custom plugin development using PHP, MySQL, and WooCommerce APIs.
    2. Performance optimizations for high-traffic eCommerce environments.
    3. Integration of third-party services (payment gateways, shipping providers, and tax calculation tools).
  • Ensure smooth migration of data (products, orders, customers) from DynamicWeb to WooCommerce.
D365 F&O & CE Integration
  • Design and develop APIs and workflows to synchronize customer data, orders, invoices, and inventory between D365 F&O, D365 CE, and WooCommerce.
  • Implement real-time order management, inventory updates, and financial reporting integrations.
  • Work with Power Automate, Logic Apps, and Azure Functions to optimize data flow.
  • Troubleshoot and enhance existing ERP and CRM integrations.
Cloud & DevOps
  • Implement CI/CD pipelines, automated testing, and containerized deployments (Docker, Kubernetes).
  • Deploy and maintain backend applications on Azure (App Services, Functions, API Management, Service Bus, SQL Databases).

Ensure data security, compliance, and scalability within cloud

Education/Technical Certifications:

  • Experience with headless eCommerce and API-driven storefronts.
  • Knowledge of GraphQL, gRPC, or WebSockets for real-time data exchanges.
  • Familiarity with serverless architectures (Azure Functions, AWS Lambda).
  • Understanding of DevOps practices, CI/CD, and cloud security best practices.

Experience:

  • 7+ years of experience in backend web development using .NET (Core/Framework) and C#.
  • Experience working with DynamicWeb eCommerce platform and/or its backend architecture (ASP.NET, Razor, C#).
  • Proficiency in WooCommerce backend development (PHP, MySQL, WordPress APIs, and WooCommerce customization).
  • Strong knowledge of RESTful API development, Webhooks, and microservices architecture.
  • Experience integrating D365 F&O and D365 CE with eCommerce platforms.
  • Expertise in Azure cloud services (Logic Apps, Function Apps, API Management, Azure SQL, Service Bus, etc.).
  • Advanced proficiency in SQL Server, Entity Framework, and relational database design.
  • Experience with OAuth, JWT, and API authentication mechanisms.
  • Strong problem-solving and debugging skills with a focus on scalable architecture.
  • Excellent communication and collaboration skills to work effectively with cross-functional teams.

Skillsets:

  • Organizational skills
  • Administrative skills
  • Computer skills
  • Leadership skills
  • Communication Skills
  • Collaboration skills
  • Independent skills
  • Analytica skills