You will get I will review and design your .NET Core backend or REST API
Project details
I have 11+ years building production .NET backends for high-load, regulated systems — the kind that run continuously, hold sensitive data, and can't afford downtime. I'll review or design your .NET Core / ASP.NET Core backend or REST API and give you a clear path to something cleaner, faster, and easier to scale.
What sets this apart: specific, impact-ranked findings — structure, performance, security, data layer — not a style-guide lecture. I assess your backend the way I'd assess one I was about to take responsibility for. Higher tiers move from review into design: API and endpoint design, Clean Architecture and DDD layering, EF Core optimization, and the calls that matter — microservices versus modular monolith, caching, and scaling strategy.
This is built for teams whose backend has outgrown its original design, or who want senior architecture eyes before they scale. Send me your code or API through Upwork and I'll show you where it bottlenecks — and how I'd restructure it.
What sets this apart: specific, impact-ranked findings — structure, performance, security, data layer — not a style-guide lecture. I assess your backend the way I'd assess one I was about to take responsibility for. Higher tiers move from review into design: API and endpoint design, Clean Architecture and DDD layering, EF Core optimization, and the calls that matter — microservices versus modular monolith, caching, and scaling strategy.
This is built for teams whose backend has outgrown its original design, or who want senior architecture eyes before they scale. Send me your code or API through Upwork and I'll show you where it bottlenecks — and how I'd restructure it.
Programming Languages
ASP.NET, C#Coding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$180
|
Standard
$550
|
Advanced
$1,200
|
|---|---|---|---|
| Delivery Time | 4 days | 8 days | 14 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 5 | 10 | 16 |
Design Customization | - | - | |
Content Upload | - | ||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Additional Revision
+$120
Additional Page
(+ 4 Days)
+$60
Design Customization
(+ 2 Days)
+$60Frequently asked questions
About Ahmed
Senior .NET & Azure Cloud Architect | Healthcare IT, Multi-Tenant SaaS
Beheira, Egypt - 5:12 am local time
Most recently, at Picis (Harris Computer), I led the transformation of a legacy healthcare portal into a multi-tenant SaaS application on .NET Core and Azure, a PACS/DICOM platform serving 52+ hospital deployments with independent scaling per tenant. Selected results:
- Migrated SQL Server → PostgreSQL, cutting query latency 40% on high-volume medical imaging workloads.
- Designed a microservices architecture on Clean Architecture principles, enabling independent deployment and reducing cross-team coupling.
- Built an LLM voice-to-structured-data pipeline (vascular ultrasound, 52+ exam types) with validation layers, hallucination guards, and circuit-breaker resilience, raising structured-output accuracy from ~60% to 90%+.
- Implemented Redis caching, async processing, and Event Sourcing for healthcare audit-compliance workflows.
Earlier, at FivosHealth, I rebuilt a thick-client WPF imaging application as an HTML5/Angular/ASP.NET Core portal, cutting client-side maintenance ~60% while holding sub-100ms response times across customer deployments.
Where I help clients:
- Azure & cloud architecture: App Services, SQL Database, Cosmos DB, Event Hubs, CI/CD
- .NET Core backend : C#, REST APIs, microservices, EF Core, performance tuning
- Healthcare IT: PACS, DICOM, HL7/FHIR, medical imaging workflows
- Multi-tenant SaaS : tenant isolation, per-tenant scaling, modular monolith → microservices
- AI/LLM integration : Anthropic Claude and multi-model orchestration, prompt design, validation and guardrails for production use
Certifications: AWS Solutions Architect – Associate; AWS Cloud Practitioner; Microsoft Azure Administrator (AZ-104); Azure Fundamentals (AZ-900); Azure AI Fundamentals; GitHub Foundations; GitHub Copilot. Currently completing AZ-204 and AZ-400.
I work best on architecture-led engagements - system design, modernization, cloud migration, and the backend that holds it together - where 11+ years shipping into regulated, high-load environments is the difference between a prototype and something you can run in production. Available 30+ hrs/week; comfortable owning a system end-to-end or embedding with an existing team.
Steps for completing your project
After purchasing the project, send requirements so Ahmed can start the project.
Delivery time starts when Ahmed receives requirements from you.
Ahmed works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery
I review your code or API, stack, and goals, and confirm scope against your tier.
Assessment
I analyze structure, performance, security, and the data layer.