Best Web Application Developer in California for custom web apps and dashboards.
Looking for the best web application developer in California?
How I work with California businesses from Dhaka
California is 13 hours behind Dhaka in summer and 14 in winter. My evening lines up with your 7 am to noon, so you get replies before the workday gets busy and a live call is easy early in the morning.
What California businesses ask me to build
MVPs for startups
Sign-in, a dashboard and an API for the one job users must do, then billing and integrations on top.
AI-powered tools
Apps where a language model does part of the work and a person approves it. Wrkbase's agent runs approved actions and logs them.
Creator and membership platforms
Accounts, content access and payments for course, community and media businesses.
Projects I've built, with live sites
Pick a project to see the result and the live site.
Wrkbase
SaaS development from scratch for my own product: I designed and built the software, the AI agent and the website it is sold from.
Customsoftware and website, built from scratch without WordPress
Tabby
A website relaunch for Tabby: front end, back end, custom plugins and payments, then the full 2.0 rebuild with its SEO kept in place.
90+Core Web Vitals at launch
Mayabee
A custom ecommerce website for Mayabee, a handbag and jewellery shop in Dhaka: English and Bangla storefront, an admin dashboard for orders, cash on delivery, stock and reports.
0.8 slargest content on screen, home page on a throttled phone, 23 Oct 2026
What to check before you pick a web application developer in California
- 01
Live projects to click through
Ask for sites you can use, not screenshots. Mine are Wrkbase, Tabby, Mayabee, each with a case study.
- 02
The admin side, not only the website
Orders, users, stock and reports are where a business spends its day. Ask who builds those screens and who keeps them working.
- 03
One person from design to launch
Fewer hand-offs means fewer misunderstandings. I research competitors, design the UI and UX, then build the frontend and backend myself.
- 04
A reply you can plan around
You get an answer within 24 hours, prices in US dollars, and a written quote before work starts. Websites from $600, web applications from $999, WordPress builds from $300.
Services
Custom website development
Websites and online stores built from scratch: UI/UX, frontend, backend and admin dashboard.
Web application development
Customer portals, internal tools and SaaS: sign-in, roles, dashboards and APIs.
WordPress development
Themes, plugins, stores and payments, built as one job.
How your project runs, step by step
- Step 01
Study your competitors
I look at what competitors do well and where they leave gaps, before a single screen is drawn.
- Step 02
Design the UI and UX
I design the screens myself, so what you approve is what gets built.
- Step 03
Build frontend to backend
Pages, accounts, orders, payments and the admin dashboard, built as one job.
- Step 04
Launch and look after it
Speed checked on a phone, then backups, monitoring and changes through website care.
Client recommendations
Recommendations from clients and colleagues, copied word for word from my LinkedIn profile.
Sakib has done a fantastic job with our Tabby 2.0 launch work along with continuous maintenance and updates on Tabby's website. He is very responsive and dedicated to any project he works on. I highly recommend him.
He is highly reliable and resourceful, with a great ability to solve problems effectively, even with limited tools and resources. His practical approach and problem-solving skills make him a valuable member of our team.
Sakib Islam is an exceptional Senior WordPress Developer with deep expertise in custom development, performance optimization, and clean, scalable code. Reliable, proactive, and easy to work with, they consistently deliver high-quality results.
His attention to detail, commitment to clean and scalable code, and deep understanding of modern frontend frameworks have consistently elevated the quality of our digital products.
His ability to translate ideas into functional designs and optimize website performance sets him apart. Beyond his technical skills, Sakib is detail-oriented, creative, and an excellent communicator.
I had the pleasure of working with Sakib Islam on several projects, and I was really happy with his performance and commitment.
Every one of these can be checked onmy LinkedIn recommendations ↗.
Your questions about hiring a web application developer in California
Ask something else on WhatsAppHow quickly can you build an MVP?
By cutting scope to the one thing users must do, I build that first and show working screens every week. The timeline depends on the screens and integrations, and you get it in the written quote.
Can we speak during California mornings?
Yes. California is 13 hours behind Dhaka in summer and 14 in winter, so my evening covers your 7 am to noon. Written updates arrive before your day starts.
How much does a web application developer in California cost?
Web applications are quoted after I read your brief, because the price depends on screens, user roles and integrations. You get a written price in US dollars before any work starts.
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