Ali R.

Struggling with complex API integrations, an unstable backend, or data that doesn't sync correctly between systems? I'm Ali Raza, a Senior .NET and C# Developer with 10 years of experience building scalable backend systems, Web APIs, third-party integrations, and business applications. Top Rated Plus with a 100% Job Success Score and consistently positive client feedback. I focus on reliable, maintainable solutions for production environments, from new API development to complex integrations and ongoing backend improvements. WHO I WORK WITH ================= - SaaS companies that need reliable backends, APIs, and third-party integrations - E-commerce businesses that need system integrations, data synchronization, and backend automation - Product-based businesses looking to build, scale, or modernize their platforms - Startups that need backend architecture and API development - Agencies and software teams that need an experienced .NET developer for ongoing projects - Finance and accounting businesses that need reliable QuickBooks, Xero, or ERP integrations HEALTHCARE SOFTWARE DEVELOPMENT: ==================================== I have experience working on healthcare technology platforms, including patient portals and digital healthcare systems. My healthcare-related work includes: Patient portals and online healthcare applications Healthcare management systems and patient-facing features Backend development and REST API integrations Patient, appointment, and healthcare workflow management Database integration and data synchronization Supporting reliable, secure healthcare applications I'm familiar with the technical requirements of healthcare applications where reliability, data consistency, and secure handling of information are important. Whether you need a new API, an existing system improved, or an ongoing development partner, I can help you find a practical approach. BACKEND & API DEVELOPMENT: ============================ - C#, ASP.NET Core, .NET 8/9/10 - REST API development and RESTful API design - ASP.NET Core Web API - GraphQL, Hot Chocolate, schema design, queries, mutations, and resolvers - API versioning, authentication, and authorization - JWT, OAuth 2.0, Swagger, and OpenAPI - Webhooks, background processing, and scheduled jobs - Microservices and modular application architecture - Legacy ASP.NET application modernization - Performance optimization and production troubleshooting I can develop APIs from scratch, extend existing services, or troubleshoot performance and reliability issues in an established backend. API INTEGRATIONS & ACCOUNTING / ERP SYSTEMS: ============================================ A major part of my work involves connecting third-party platforms with custom applications and ensuring data flows reliably between systems. Platforms:: -------------- QuickBooks Online and Desktop, Xero, Sage, FreshBooks, Zoho Books, NetSuite, Microsoft Dynamics, Business Central, MYOB, Wave, Fortnox, Visma, PowerOffice, Exact Online, Stripe, PayPal, Plaid, and other third-party APIs. Integration capabilities: ----------------------------- - Two-way data synchronization - Customer and contact synchronization - Invoices, payments, bills, expenses, and transactions - Financial data import, export, and reconciliation workflows - Webhooks and event-driven synchronization - OAuth 2.0 authentication and API authorization - Pagination, rate-limit handling, and retry mechanisms - Error handling, logging, and data consistency - Scheduled synchronization and large-volume data processing I focus on the complete integration process, including data mapping, business rules, error recovery, and reliable synchronization—not just making an API call. ATABASES & DATA: ================= - Microsoft SQL Server and Azure SQL - PostgreSQL, MySQL, and MariaDB - MongoDB, Cosmos DB, Firebase, and Redis - Entity Framework Core and Dapper - Database design and query optimization - Performance tuning and troubleshooting - Data synchronization, ETL workflows, and bulk processing CLOUD, DEVOPS & DEPLOYMENT: ============================== - Azure App Service and Azure SQL - Azure Blob Storage, Functions, and Service Bus - Azure Key Vault and Application Insights - Azure DevOps and CI/CD pipelines - AWS services and cloud deployments - Automated builds, testing, and release management - Production deployment and troubleshooting ADDITIONAL INTEGRATION EXPERIENCE: =================================== I can also integrate LLM APIs such as OpenAI and other third-party services into existing .NET applications when required. If you need an experienced .NET developer for backend development, API integrations, accounting or ERP synchronization, or ongoing product development, send me a message with your requirements. I'm happy to discuss the technical details and the best approach for your project.