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

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