Offline-first apps
Apps for field teams that keep working without signal and sync data later.
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Progressive Web App development
A Progressive Web App gives you one app for phone, tablet and desktop, installed from the browser, with no app store. I build PWAs that keep working offline and sync when the connection returns.
- 100% Job Success
- Top Rated Plus on Upwork
- 56 Upwork jobs
- 7,300+ hours worked
What I do
Progressive Web App development services
What you can hire me for.
Installable web apps
Home-screen install on iOS, Android and desktop from a single web codebase.
Mobile-friendly interfaces
Touch-friendly screens that feel like a native app.
Payments in the app
Group and event payments, checkout and subscriptions.
Web app to PWA conversion
Adding install, caching and offline support to an existing web application.
Backend and sync
ASP.NET Core or Firebase backends with reliable data sync.
Proof
Related projects
Past work in this area. See all 12 projects.
Event and group payments PWA
FairShare
A Progressive Web App for running group events and collecting shared payments on desktop and mobile.
- Organiser dashboards and event creation
- RSVP management and payment collection
- Installable, app-like experience across devices
- React
- Firebase
- PostgreSQL
- PWA
HVAC SaaS marketing website
RTUMap
The marketing website for a commercial HVAC survey platform, built from scratch to turn visitors into trial users.
- Landing pages, pricing plans, comparison tables and FAQs
- Free-trial A/B testing, UTM tracking and Google Analytics 4 events
- Zendesk chat, hosted on Cloudflare Pages
- JavaScript
- Google Analytics 4
- A/B testing
- Cloudflare Pages
Client reviews
What Upwork clients say
Real reviews from completed Upwork contracts. Read all reviews.
★★★★★
“Working with Hashir on our React + .NET Website was an outstanding experience. From our very first conversation, he demonstrated a deep expertise in both front-end and back-end technologies. He delivered every feature on time, often ahead of schedule, with clean, well-documented code that required no rework. Communication was seamless: Hashir was always responsive, explained technical details in clear terms, and proactively suggested valuable enhancements.”
★★★★★
“Hashir was great to work with on this project. He was very responsive and always seeking ways to deliver quality. He made sure to understand requirements and followed up with questions in instances where certain details didn't make sense. He took ownership of the requirements and ran with it.”
How it works
How we work together
A simple process with no surprises.
Share your requirements
Send a short brief on Upwork, WhatsApp or LinkedIn. I reply with questions and a practical plan.
Scope and estimate
You get a clear scope, timeline and an hourly or fixed-price estimate before any work starts.
Build in weekly steps
I ship working software in small releases and keep you updated at every step.
Launch and support
I deploy to production, hand over the code and stay available for fixes and new features.
Questions
Common questions
Short answers before you get in touch.
PWA or native app: which should I choose?
A PWA is usually faster and cheaper to build because one codebase serves every device and there is no app store review. A native app makes sense when you need deep device features.
Do PWAs work offline?
Yes. I build offline-first PWAs that store data on the device and sync when the connection returns.
Can a PWA be installed on an iPhone?
Yes. Users can add a PWA to the home screen on iOS and Android and open it like any other app.
More services
Other ways I can help
Each service has its own page.
Have a project in mind?
Message me on Upwork, WhatsApp (+92 313 2613274) or LinkedIn with your requirements, and I will reply with a practical plan.