West · United States
Custom PHP and MySQL application development in Seattle
When an off-the-shelf plugin does not fit the business, I build the thing that does — booking systems, client portals, quote calculators, admin dashboards, and integrations with whatever API you already depend on. For Seattle businesses, quoted in USD from $200, typically live in 10 days.
What custom php and mysql application development includes for a Seattle business
Fixed scope, agreed in writing before development starts. From $200, typically live in 10 days.
- Database design and schema, documented rather than improvised
- Application build in PHP with a MySQL backend
- Admin interface built for the people who will use it daily
- Role-based access control where more than one person logs in
- Third-party REST API integrations
- Transactional email via PHPMailer with proper SPF/DKIM alignment
- Input validation, prepared statements and CSRF protection throughout
- Written handover documentation — you are not dependent on me to keep it running
The terms for a American client
| Starting price | From $200, quoted and invoiced in USD |
|---|---|
| Typical timeline | 10 days once content is supplied |
| Tax position | state sales tax on your own sales; my invoices are services exported from Pakistan and carry no US tax |
| Data protection | a state patchwork — CCPA/CPRA in California, plus Virginia, Colorado, Connecticut and Texas equivalents — resolved by a DPA with the sub-processor disclosure those state laws require you to publish |
| Payment rails available | Stripe, ACH via Plaid for larger invoices, and Shop Pay or Apple Pay at checkout |
| My day in Seattle time | 00:00–09:00 — a shifted window is agreed in writing instead |
Why this matters for United States specifically
Most US small-business sites lose money at the same place: a contact form that asks for a phone number before it has earned one. American buyers self-serve further down the funnel than UK ones, so I push pricing and scope earlier on US builds.
The performance budget every Seattle build is held to
Pages are built to a hard weight limit rather than optimised afterwards, because retrofitting speed onto a heavy site is several times the work of not making it heavy. In practice that means no framework runtime on a content page, fonts subset to the characters actually used, and images generated at the sizes actually displayed.
For United States specifically this is a commercial number, not a vanity one. A visitor on mobile data who waits four seconds is frequently a visitor who is gone, and the analytics will record it as a bounce rather than as the lost sale it was. Core Web Vitals is simply the name Google gave to noticing this.
Manufacturing, wholesale and B2B in Seattle
A B2B site in Seattle serves two audiences with opposite needs. A buyer wants specifications, tolerances, lead times and a downloadable datasheet. A procurement officer wants your company registration, insurance, certifications and payment terms. Serving both from one undifferentiated "About" page serves neither of them.
The highest-value feature is almost always a searchable product or capability index carrying real part numbers, because that is what engineers search for. It is unglamorous, it is a database problem rather than a design problem, and it produces enquiries that arrive already qualified.
Images shipped at ten times the size they display
A hero photograph exported at 4000 pixels wide and displayed at 400 is the most common single cause of a slow page. The browser downloads all of it and then discards most of it. On a phone over mobile data that is several seconds spent waiting for pixels nobody will ever see.
The fix is generating each image at the sizes actually used, serving AVIF or WebP with a fallback, and setting explicit width and height so the layout does not jump while they load. It is mechanical work with a directly measurable result, which makes it the first thing worth doing on almost any Seattle site.
What I am not claiming about Seattle
- I have no office, postal address or phone number in Seattle
- I cannot meet you in person, and if that is a requirement you should hire locally
- I am not claiming existing clients in Seattle specifically — my live work is listed on the work page and you can check it
- Nothing on this page is a guarantee of search rankings, which no developer can honestly offer
Custom PHP and MySQL application development in Seattle — common questions
- Can you fix my existing site rather than rebuild it?
- Often, yes, and it is usually the cheaper answer. Speed problems, a broken mobile layout, a form that silently fails or missing structured data are all fixable on the site you already have. I will tell you which of the two you need after looking, and a rebuild only gets recommended when the fix would cost more than starting again.
- Do you provide ongoing maintenance after launch?
- Thirty days of snag fixes are included after launch at no extra cost — anything that does not work as specified gets fixed. Beyond that there are monthly plans for updates, backups, monitoring and small changes. They are optional and cancellable; a site handed over properly does not require a retainer to keep running.
- How long does a Seattle project actually take?
- Three days for a business site, seven for a store, ten for a custom application. That holds because the process is fixed rather than improvised and because your content exists on day one. What stretches a build is almost never the code — it is waiting for copy, logos and photographs, so those are requested before the clock starts.
- What hours will you be available to us in Seattle?
- Honestly: very little, by default. My standard day lands at 00:00–09:00 your time, which barely touches a Seattle working day. So United States projects run on a deliberately shifted schedule — I commit in writing to a fixed daily window that falls inside your morning, plus asynchronous written updates you can read before you start. If a supplier in your own timezone is what you need, that is a legitimate reason to hire locally.
- How do you handle our customers' data under state patchwork — CCPA/CPRA in California?
- Your customer data is governed by a state patchwork — CCPA/CPRA in California, plus Virginia, Colorado, Connecticut and Texas equivalents, and sending it to a developer in Pakistan is a restricted transfer. That is resolved by a DPA with the sub-processor disclosure those state laws require you to publish, published on this site and pre-signed before you send an enquiry — not drafted after you ask about it.
- What payment methods can my Seattle checkout accept?
- For United States: Stripe, ACH via Plaid for larger invoices, and Shop Pay or Apple Pay at checkout. The right combination depends on your average basket and your customers, and picking wrong is expensive — the payment method a buyer expects but cannot find is one of the most common reasons a checkout is abandoned at the final step.
- What currency will I be invoiced in?
- USD. Quotes, milestones and the final invoice are all written in USD so you are never comparing a converted figure against a local supplier's. Regarding tax: state sales tax on your own sales; my invoices are services exported from Pakistan and carry no US tax.
Related pages
Other services in Seattle
Custom PHP and MySQL application development in nearby West towns
- Custom PHP and MySQL application development Los Angeles
- Custom PHP and MySQL application development San Jose
- Custom PHP and MySQL application development Albuquerque
- Custom PHP and MySQL application development Boise
- Custom PHP and MySQL application development Fresno
The full service detail — process, deliverables, what is excluded and the FAQ — is on the main custom php and mysql application development page. Everything I build for Seattle is on the Seattle page, and every town in United States is on the United States coverage page.
Custom PHP and MySQL application development in Seattle — get a fixed quote
Send the brief and you get a reply within one business day, priced in USD from $200. If custom php and mysql application development is not what your project actually needs, I will say so.
- Response
- Replies within 1 business day
- Hours
- Mon–Fri, 09:00–18:00 PKT — overlaps 05:00–14:00 UK, 00:00–09:00 US Eastern
- Booking
- Booking projects from October 2026