Consultancy & engineering services Remote from Karachi, Pakistan
Software consultancy, .NET modernization & AI chatbot development.
I help teams plan, build, modernize, and test business software—from architecture advice and legacy .NET migration to RAG-based AI chatbots, API integrations, and Flutter mobile apps. Fourteen years of production experience across .NET, Python, PHP, and Flutter.
- Experience
- 14 years in production software
- Stacks
- .NET · Python · PHP · Flutter · AI
- Working model
- Remote, with on-site or hybrid by arrangement
What I offer
Eight ways I can help.
Each engagement starts with a short conversation about your goal, your current system, and your constraints. Choose a service to leave a note with the topic already selected.
Software & architecture consultancy
An experienced second opinion before you commit: architecture reviews, technology choices, delivery plans, and practical roadmaps for teams building or scaling business software.
- Architecture and technology-stack reviews with clear trade-offs
- Build-versus-buy and modernization roadmaps
- Delivery planning that fits your team and constraints
- Hands-on guidance for engineering teams
.NET application modernization
Move established .NET Framework, WinForms, or WebForms systems onto ASP.NET Core and Blazor in safe, incremental steps—without throwing away years of business logic.
- Incremental migration plans instead of risky rewrites
- ASP.NET Core Web APIs and Blazor interfaces
- Entity Framework Core and SQL Server data layers
- Reusable components and cleaner boundaries
AI chatbot & RAG website assistant development
Website assistants and knowledge-base chatbots that answer from your own content using retrieval-augmented generation (RAG)—with scope controls, data retention, and a clear hand-off to a person.
- Website and document ingestion, chunking, and embeddings
- Grounded answers from approved content, not guesses
- Off-topic handling, rate limits, and retention windows
- Lead and enquiry capture with human hand-off
AI & LLM integration consulting
Add large language models to existing products the careful way: choosing the right use cases, integrating the OpenAI API, and building in guardrails, moderation, and cost controls.
- Use-case discovery and feasibility assessment
- OpenAI API integration into .NET, Python, or PHP systems
- Prompt design, moderation, and safety guardrails
- Usage budgets, rate limiting, and monitoring
API development & systems integration
Well-designed REST APIs and dependable integrations that connect your applications, third-party platforms, and data—built to be documented, testable, and easy to maintain.
- REST API design and implementation
- Third-party and partner system integrations
- Webhooks with signature verification and idempotency
- Clear documentation and automated tests
Test automation (Playwright & BDD)
Reduce release risk with automated browser and API tests written in business language, so the whole team can read what is covered and trust each release.
- End-to-end browser tests with Playwright
- Gherkin / BDD scenarios in plain business language
- Unit and integration test strategy
- CI pipeline integration with Azure DevOps
Flutter mobile app development
Cross-platform Android and iOS apps from a single Flutter codebase, with responsive interfaces, predictable state management, and reliable API integration.
- Android and iOS apps from one codebase
- Responsive Material Design interfaces
- State management and offline-friendly patterns
- Integration with your existing APIs and back end
Code review & technical audits
An independent review of an existing codebase: maintainability, security basics, performance hotspots, and test coverage—delivered as a prioritised, practical list of improvements.
- Codebase health and maintainability review
- Security and performance hotspot findings
- Test-coverage and release-risk assessment
- A prioritised, actionable improvement plan
Why work with me
Senior experience, practical delivery.
I have spent fourteen years building and modernizing long-lived products—auto-shop management, retail and restaurant point-of-sale, mobility, and real-estate systems—so I know how to improve software without disrupting the people who depend on it.
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01
Understand first
Every engagement starts with your users, business rules, and constraints—not a technology preference.
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02
Small, safe steps
Incremental, reviewable changes reduce risk and keep your system running throughout.
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03
Proven in production
See how an AI assistant is grounded, scoped, and handed to a person in the RAG website assistant case study, or browse selected work.
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04
Leave it maintainable
Clear code, documentation, and tests so your team can confidently own what is delivered.
Questions
Frequently asked questions.
What kind of projects does Wasiullah Qureshi take on?
Software and architecture consultancy, .NET modernization, AI chatbot and RAG website assistant development, AI and LLM integration, API and systems integration, test automation, Flutter mobile apps, and code reviews or technical audits.
Do you work remotely with international teams?
Yes. Wasiullah is based in Karachi, Pakistan, and works with teams remotely. On-site or hybrid arrangements can be discussed where practical.
Can you build an AI chatbot trained on my website content?
Yes. Using retrieval-augmented generation (RAG), the assistant answers from your own pages and documents rather than guessing, stays on topic, and hands enquiries to a person when needed. See the RAG website assistant case study for how it works.
Can you modernize a legacy .NET application without a full rewrite?
Usually, yes. The preferred approach is incremental: introduce ASP.NET Core APIs and Blazor components step by step, keeping the existing system running and its business rules intact.
How much does a project cost?
Every project is scoped individually, so there is no fixed price list. Leave a short note describing what you need, and Wasiullah will follow up to discuss scope.
How do I start a conversation?
Use “Leave a note” on this page or in the chat assistant, or email wasiullahqureshi@gmail.com. A short description of your goal, timeline, and current system is the most helpful start.
Next step
Tell me what you’re building.
Share your goal, current system, and timeline in a short note. Add your email if you’d like a reply.