You will get Custom .NET Core REST API: Secure, Tested, and Azure-Ready
Rising Talent
Project details
I will build a production-ready REST API in ASP.NET Core (.NET 8) with Clean Architecture, full authentication, Swagger/OpenAPI documentation, unit & integration tests and Docker deployment config.
Whether you need a brand-new backend for your SaaS product, a microservice to extend your existing system or a secure API layer for your mobile app, you'll get clean and maintainable code that scales.
7+ years building enterprise .NET backends. 50+ APIs shipped to production. Zero missed deadlines.
Whether you need a brand-new backend for your SaaS product, a microservice to extend your existing system or a secure API layer for your mobile app, you'll get clean and maintainable code that scales.
7+ years building enterprise .NET backends. 50+ APIs shipped to production. Zero missed deadlines.
Programming Languages
JavaScript, ASP.NET, C#Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$180
|
Standard
$400
|
Advanced
$900
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 2 | 3 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
Frequently asked questions
About Usman
Senior Backend Dev | .NET, FastAPI, Flask | AI/ML APIs | Microservices
Burewala, Pakistan - 11:00 am local time
Over 7+ years, I've architected backend systems for SEC-compliance platforms, CRM products, AI-driven customer management solutions, and SaaS applications serving enterprise clients across fintech, legal, and healthcare verticals.
𝐖𝐡𝐚𝐭 𝐈 𝐃𝐞𝐥𝐢𝐯𝐞𝐫:
🔹 𝗦𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲: ASP.NET Core Web APIs, event-driven microservices with Apache Kafka, multi-tenant SaaS backends handling thousands of concurrent users on Azure Kubernetes
🔹 𝗔𝗜-𝗣𝗼𝘄𝗲𝗿𝗲𝗱 𝗙𝗲𝗮𝘁𝘂𝗿𝗲𝘀: OpenAI/GPT-4 and Claude API integration into existing .NET systems, RAG-based knowledge assistants, LLM-driven document processing and intelligent workflow automation
🔹𝗘𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲 𝗦𝘆𝘀𝘁𝗲𝗺 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻: SAP and Microsoft Dynamics connectivity, Stripe payment processing (subscriptions, invoicing, secure transactions), Azure AD authentication, and third-party API orchestration
🔹 𝗖𝗹𝗼𝘂𝗱-𝗡𝗮𝘁𝗶𝘃𝗲 𝗗𝗲𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁𝘀: Azure (App Services, Functions, Service Bus), Docker/Kubernetes with full CI/CD pipelines, production monitoring with centralized logging
𝐑𝐞𝐜𝐞𝐧𝐭 𝐑𝐞𝐬𝐮𝐥𝐭𝐬:
✅ Led backend engineering for an enterprise AI platform (Fortune 500 client), designed microservices architecture with Kafka event-driven messaging, Azure AD auth, and Kubernetes orchestration
✅ Built dual-dashboard analytics system with ClickHouse powering real-time public analytics and a complete data ingestion pipeline with hierarchical approval workflows
✅ Architected SEC-compliance platform backend in C# .NET, improved core services, integrated document management (PDF/Word), and delivered LLM proof-of-concepts using Llama 2
✅ Designed and shipped Stripe payment workflows (subscriptions, invoicing) and contributed to a banking application's core feature modules
✅ Implemented SSO across client applications single-handedly, designed REST APIs consumed by mobile and web frontends across multiple products
𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤:
𝗕𝗮𝗰𝗸𝗲𝗻𝗱: C#, ASP.NET Core, .NET 8, .NET Framework, Python, FastAPI, Entity Framework Core, Dapper
𝗔𝗜/𝗠𝗟: OpenAI API, Claude API, Llama 2, Semantic Kernel, RAG, LangChain, Vector Databases
𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲: Microservices, CQRS, Clean Architecture, Event-Driven (Kafka), Domain-Driven Design
𝗖𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀: Azure (AD, Functions, Service Bus), Kubernetes, Docker, Jenkins, Azure DevOps
𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀: SQL Server, PostgreSQL, ClickHouse, SQLite, Redis, MongoDB
𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: SAP, Microsoft Dynamics, Stripe, SignalR, REST/SOAP APIs, Apache Kafka
𝐇𝐨𝐰 𝐈 𝐖𝐨𝐫𝐤:
𝟭. 𝗗𝗶𝘀𝗰𝗼𝘃𝗲𝗿𝘆: Understand your goals, constraints, and existing systems before writing any code
𝟮. 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲: Scalable system design with clear documentation you own fully
𝟯. 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Agile sprints with transparent daily updates and clean, tested code
𝟰. 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝘆: Production deployment with comprehensive testing, monitoring setup, and handoff docs
Have a backend challenge or want to explore how AI can make your product smarter? Share your requirements and I'll give you specific, honest feedback on the best path forward. Let's build something that scales.
𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀: Senior .NET Developer | .NET Core Developer | ASP.NET Core | C# Developer | .NET 8 | .NET 9 | Backend Developer | Senior Backend Developer | Backend Engineer | .NET Backend | Web API Developer | JavaScript | Javascript developer| Apache Kafka | Kafka | Microservices | REST API | Fast API | API development| AI | ML | Restful API | Entity Framework Core | Dapper | SQL Server | PostgreSQL | Clean Architecture | CQRS | Domain-Driven Design | Microservices Architecture | Event-Driven Architecture | Microservices Developer | Azure Developer | Azure Kubernetes Service | AKS | Docker | Kubernetes | Terraform | CI/CD | Azure Functions | Serverless | Cloud-Native Development | SaaS Developer | Multi-Tenant Architecture | SaaS Backend | Enterprise Application Developer | Enterprise Architecture | System Integration | Stripe Integration | API Gateway | SignalR | FastAPI | Python Backend | AI Agent Development | AI Integration
Steps for completing your project
After purchasing the project, send requirements so Usman can start the project.
Delivery time starts when Usman receives requirements from you.
Usman works on your project following the steps below.
Revisions may occur after the delivery date.
Requirement Analysis & Planning
I review your requirements, define API scope, and propose architecture.
Architecture & Database Design
I design clean architecture, database schema, and project structure.