Offline-first web apps
with
PWA architecture
that scales.
I build Next.js PWAs with IndexedDB, service workers, background sync, and resilient UX so your users can keep working even on poor or no network.
PWA case studies
Two production PWAs for real clients, still running and handling real money every month.
SG Freight Pvt Ltd
sgfreight.in ↗Took over SG Freight's multi-tenant freight portal after another developer had started it, and shipped it as a production PWA the team and their vendors use every day. Each of their 120+ vendors across 8 countries works in their own space, while the team manages everything from one place.
- •Took a partly built portal all the way to a complete, production-ready platform.
- •Every vendor gets their own space with the right access, managed from one admin view.
- •Automation handles 850+ imports and 620+ exports a month, with shipment alerts keeping everyone updated.
- •Stripe Connect payments built into the same app, with $400K processed in the peak month.
At Your Service Psychiatry
atyourservicepsychiatry.com ↗At Your Service Psychiatry's PWA, where I built the integration between Acuity Scheduling, Supabase, and Stripe Connect. Every booked appointment triggers its own split: 80% to the provider who takes the session, 20% to the platform. The system now handles around $45K a month, more than $600K a year.
- •Every Acuity booking kept in sync with Supabase and Stripe Connect.
- •80/20 provider and platform split applied automatically on each appointment.
- •Nobody reconciles provider payouts by hand.
Testimonials
What our client are saying about us
We brought Kavya in to take over our multi-tenant portal after another developer had started it, and he took it all the way to a complete, production-ready platform that now runs a big part of our day-to-day operations.
He set it up so each of our 120+ vendors across 8 countries works in their own space with the right access, while we manage everything from one place. He also built the Stripe Connect payments, which have processed over $3.7M so far, along with automation that now handles 850+ imports and 620+ exports every month and shipment alerts that keep everyone updated along the way.
What stood out most is that he doesn't just take a task and build it. He thinks it through first, flags anything that could cause problems later, and comes back with suggestions that often made the product better than what we originally asked for. We never had to hand-hold him—he understood the freight side of our business quickly and took real ownership of the work.
I'd recommend him to anyone building a serious product.
Sunil G
Director, SG Freight Private Limited
Thanks and I appreciate how reliable you are. I've worked with so many & you have been the best experience time and time again.
Jordan Gill
Founder, Systems Saved Me
Kavya is not only technically skilled but also a great communicator and highly professional. I look forward to new collaborations with him and highly recommend his services to others!
Wayaz Mirza
Founder, Homework LLC
Kavya gave great advice and suggestions for how to build a successful Saas product. He's very kind and helpful; you can tell he loves what he does. I'll definitely be seeking his expertise again!
Nicole Larson
Founder, Asset Assign
Very fast and professional work. I had that problem for couple of days, but Kavya Gaur fixed it in matters of hours.
Hristo Hristov
Client
Kavya is great to work with and delivers with high quality
Konica Miolta
Client
Responsive and competent
Mark Katchen
Founder, The Phylmar Group
Trusted by teams
Some of the companies I have worked with
From freight platforms to healthcare booking apps, a selection of teams who rely on me for fast, installable web apps that hold up in production. 70+ companies in total.
SG FREIGHT PVT LTD
Homework LLC
1 to 100
Flipper Log
Asset Assign
Wishara
Supertek Dies and Tools
Systems Saved Me
Fancoore
Insemoo
At Your Service Psychiatry
Programming Journeys
Little Spark
Drawerrr
Get Lean
How to create a React PWA and its architecture
A quick overview from Kavya — watch to see how service workers, manifests, caching, and offline sync fit together in a production React PWA.
// the_pattern
Web apps look great online. Users churn when connection drops.
Without durable local state and sync pipelines, teams face data loss, duplicate actions, and unstable UX. These are the common failure points:
No service worker caching strategy
Impact: Cold starts and blank screensLocal writes are not persisted in IndexedDB
Impact: Data loss on refreshNo background sync or retry queues
Impact: Dropped user actionsNo stale-while-revalidate behavior
Impact: Slow and inconsistent readsVersion upgrades are unmanaged
Impact: Schema migration riskOffline UX states are missing
Impact: Trust and conversion drop// process
How I Ship Offline-First PWAs
Build sequence focused on data safety, reliability, and smooth degraded-network UX.
Product Discovery + Failure Mapping
Map high-risk actions, offline durations, and business-critical data paths before implementation starts.
IndexedDB Domain Modeling
Define stores, indexes, key strategy, migrations, and transactional boundaries to prevent local corruption.
Service Worker Policy Design
Assign cache strategies per route/resource class and define update + invalidation behavior.
Sync Pipeline + Conflict Resolution
Implement outbox queue, replay policies, idempotency keys, and deterministic conflict handling.
Reliability QA + Progressive Rollout
Run offline test suites, migration simulations, and staged rollout with telemetry guardrails.
PWA architecture components
Core layers for robust offline-first products in Next.js, from local data contracts to sync orchestration.
App Shell + Installability
Manifest, install prompts, and shell-first routing for repeat access.
Service Worker Runtime
Route-level cache strategies and update lifecycle handling.
IndexedDB Persistence
Versioned stores and transactional writes for reliable local state.
Sync + Retry Engine
Outbox queues, idempotency keys, and replay prioritization.
Conflict + Consistency Layer
Merge policies for stale writes and user-facing resolution states.
Observability + Recovery
Sync telemetry, failure analytics, and rollback-safe releases.
// architecture_page
Complete PWA Architecture
Full breakdown of layers, data flow, and release guardrails.
// workflow_page
Delivery Workflow
Step-by-step implementation from discovery to rollout.
// blog
New Blog: Offline-First in Next.js
Practical guidance for IndexedDB, service workers, and sync queues.
Let's build your offline-first PWA.
Book a 30-minute call and share your use case, reliability goals, and rollout constraints to get a concrete architecture + implementation roadmap.
Book a PWA Architecture Call