YRYasir.dev
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Available for select projects — 2026

Senior .NET & React
engineer for systems
that actually scale.

I'm Yasir Rehman— I build enterprise web apps, ERP/CRM platforms, AI integrations and automation systems with ASP.NET Core, React & SQL Server. 5+ years · 60+ projects delivered · Top Rated on Upwork & Fiverr, building AI-powered software for businesses worldwide.

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YasirRehman.cs.NET & C#
public class Engineer {
public string Name => "Yasir Rehman";
public string[] Stack => [
"ASP.NET Core", "C#", "React",
"SQL Server", "Azure", "OpenAI"
];
public int Projects => 60;
public double Rating => 5.0;
// ships production systems, not demos
public Result Build(Idea idea) =>
idea.ToScalableSystem();
}
Build passing~ 5+ yrs uptime
Trusted across
UpworkFiverrHospitalityReal EstateLogisticsFinTech
Tech stack
C#C#
.NETASP.NET Core
NXTNext.js
ReReact
TSTypeScript
JSJavaScript
SQLSQL Server
AzAzure
🐳Docker
ReRedis
GitGit
NgAngular
FbFirebase
AWSAWS
AIOpenAI
EFEntity Framework
BlzBlazor
StrStripe
SRSignalR
APIWeb API
C#C#
.NETASP.NET Core
NXTNext.js
ReReact
TSTypeScript
JSJavaScript
SQLSQL Server
AzAzure
🐳Docker
ReRedis
GitGit
NgAngular
FbFirebase
AWSAWS
AIOpenAI
EFEntity Framework
BlzBlazor
StrStripe
SRSignalR
APIWeb API
How I turn your idea into a shipped product
01Discover

Deep-dive into your goals, users & constraints

02Architect

Right stack, clean design, defined scope & milestones

03Build

Agile sprints, regular demos, clean documented code

04Ship & Support

CI/CD deploy, monitoring, handover & ongoing care

AI Systems — Always On

I build AI-powered systems that run your business while you sleep.

From chatbots to full CRM/ERP platforms — AI woven into systems built for real businesses, not demos.

Explore AI & AutomationStart an AI project
OpenAI APIClaudeAzure OpenAIn8nWhatsApp Cloud API
ai-agent · yasirrehman.dev Online
Autonomous · 24/7No-code handover
Where it shows up in your business

AI Chatbots & Virtual Agents

24/7 agents that qualify leads, answer customer questions and book calls — on your website or WhatsApp.

AI-Powered Mobile Apps

Cross-platform apps with smart search, recommendations and in-app assistants built in from day one.

Smart Business Websites & Tools

SEO-ready sites and internal tools that automate reporting, admin work and daily busywork.

CRM & ERP for FinTech and Real Estate

Lead pipelines, billing and property/lending dashboards tailored to how your business actually runs.

Hospitality & Manufacturing Systems

Booking, inventory and production tracking for hotels, factories and foam/industrial manufacturers.

Workflow & Business Automation

Autonomous pipelines that replace manual spreadsheets, approvals and repetitive data entry.

Selected Work

Systems shipped for real businesses

Case Study

Healthcare Shift Management & Clinical Records App

Full-stack healthcare workforce platform — shift logging, clinical records, and incident reporting across a responsive website and native iOS/Android apps.

30% reduction in manual logging
Read the full breakdown
Healthcare Shift Management & Clinical Records Appdashboard · before / after
Services

Engineering across the full stack

From idea to production — backend, frontend, mobile, AI and the business systems that tie it all together.

Backend Architecture

Clean, scalable .NET systems built on solid boundaries — APIs, services and domain logic that hold up under growth.

.NET 8ASP.NET CoreClean Architecture

ERP / CRM Platforms

Custom business systems for logistics, real estate and warehousing — dispatch, inventory, billing and dashboards.

SQL ServerSignalRReporting

Mobile Apps

Cross-platform mobile apps that pair with your backend for field teams, drivers and customer-facing workflows.

React NativeRealtimePush

AI Integrations

Production-grade AI features — chat, drafting, summarisation and automation wired safely into existing systems.

OpenAI APIPrompt DesignAutomation

Payments & Billing

Subscription billing, invoicing and payment flows integrated cleanly with your product and customer records.

StripeInvoicingWebhooks

Data & Cloud

Database design, migrations and cloud deployment so your data stays fast, consistent and easy to scale.

SQL ServerAzureDocker
Explore all services
Writing & Video

Technical content for builders

Deep-dives on .NET, architecture and AI — plus walkthroughs on YouTube.

All articles
Tech Stack

Tools I work with every day

A battle-tested stack built for enterprise-grade software.

Core / Backend
.NET 8C#ASP.NET CoreWeb APISignalREntity FrameworkClean Architecture.NET 10
Frontend
ReactNext.jsTypeScriptAngularFramer MotionTailwind CSS
Data & Cloud
SQL ServerPostgreSQLAzureFirebasePrismaDockerAWS
AI & Integrations
OpenAI APIWhatsApp Cloud APIStripeREST APIsWebhooksMeta Cloud APITikTok API
Why It Works

Built different. Delivered right.

Most freelancers write code. I build systems. Here's what actually makes the difference.

Enterprise-Grade Architecture

I write code that handles 10× the load from day one. Clean architecture, proper separation of concerns, zero technical debt that will bite you 6 months in.

Full-Stack End to End

Backend, frontend, mobile and AI — one engineer who owns the whole product. No handoff gaps, no blame-passing, no coordination overhead.

Business-First Thinking

I understand your workflows before writing a line. The system fits your business, not the other way around. I ask the right questions so you don't have to.

You're Never in the Dark

Weekly demos, transparent milestones and a 24-hour reply guarantee. You always know exactly where your project stands — no radio silence, ever.

Client feedback

What clients say

1 / 7
Fiverr

“Working with Yasir has been a pleasure so far. The team have shown nothing but politeness, professionalism and a real want to ensure what they produce is exactly as requested. I look forward to developing this professional relationship.”

s

shifthappensuk

CEO

Fiverr

“Yasir Rehman's work in software development was EXEMPLARY! His attention to detail and code expertise truly shone through in the delivery, and working with him was a breeze thanks to his quick responsiveness and professional approach. Plus, he went above and beyond expectations, making the entire experience top-notch.”

k

kehaglem

CEO

Fiverr

“I got exactly what I was looking for. Seller is very good at what he does and he responds swiftly to my comments and queries. Very good, i would love to work again with him”

ProjectBug Fixes — Up to $50 • 5 days

v

vusalpashall

Bug Fixes • Azerbaijan

Ready when you are

Let's turn your idea into a
system that scales.

Join 50+ clients who shipped reliable software with me. Tell me what you're building — I'll reply within 24 hours with a clear plan.

Start your projectTry the tools