bigf.me/Independent builder

Work directly with the person building it

Your next idea.
Let’s make it real.

I’m Big, a designer and developer. I build websites, apps and business tools that turn “we should” into something you can actually use.

Book a 30-minute call ↗Explore the services ↓

30-minute intro · English / ไทย · No commitment

Bunyasit Fang, also known as Big
Bunyasit FangDesign → build → handoff
Independent by choice. Built with intention.Find your starting point ↓

01 / The offers

A clear way
to get moving.

Choose the outcome you need. We’ll agree the details before the first line of code.

01 / Discovery sprint

Find the right first build

Turn an idea into a clear plan and a clickable prototype of one key flow.

3–5 working days · Agreed scope

  • 90-minute scope workshop
  • Written scope, priorities and technical recommendation
  • Clickable prototype of one primary flow
  • Full fee credited toward Launch if you upgrade within 30 days

Planning and prototype only. Production development is a separate phase.

Project fee

฿49,000

50% at kickoff · 50% at delivery

Discuss this project ↗

02 / Launch build

Launch your next idea

A focused web product that lets customers take one useful action.

Around 2 weeks · Agreed scope

  • Up to 5 screens around one primary journey
  • Responsive design, forms and lightweight data management
  • One sign-in method, if your flow needs it
  • Domain setup, deployment and handoff documentation

No payment system, custom admin dashboard or complex integrations.

Project fee

฿120,000

40% at kickoff · 40% at working demo · 20% at launch

Discuss this project ↗

04 / Platform build

Build your first platform

A tightly scoped first version of your marketplace, SaaS or customer portal.

Around 4–6 weeks · Agreed scope

  • Agreed core roles and end-to-end user journeys
  • Admin controls and selected integrations
  • One agreed monetization flow, where needed
  • Error monitoring, conversion events and a next-phase roadmap

Final scope confirmed after discovery. Native apps and ongoing feature work are separate.

Project fee

฿265,000

40% at kickoff · 40% at working demo · 20% at launch

Discuss this project ↗

Something more specific? AI workflow automation, an existing product that needs help, or ongoing improvements.

Tell me what you need ↗

All prices in THB. Third-party fees and any applicable taxes will be itemized in your written quote. Timelines depend on scope and timely feedback.

02 / Inside a build

More than
a good-looking page.

A storefront for customers. A working system for the people behind it.

Top of the Rank vehicle storefront designExplore the visual demo

Automotive / Custom business app

Top of the Rank

A luxury vehicle showroom backed by inventory, photo management and customer inquiry tools.

  • Searchable showroom and individual car pages
  • Staff tools to manage vehicles, photos and availability
  • Lead management and promotional content

Storefront demo shown. Inventory and staff tools are part of the broader build.

03 / How we work

Clear scope.
Visible progress.

You know what’s being built, what comes next and when each payment is due.

  1. 01

    Talk it through

    We discuss the problem, the people using it and what success should look like.

  2. 02

    Agree the plan

    A written scope, responsibilities, review dates and milestones. Extras get their own quote.

  3. 03

    Try the real thing

    Review a working demo, give consolidated feedback and see the core flow in action.

  4. 04

    Launch & hand over

    Deploy, walk through the product together and receive the agreed code and documentation.

04 / Your next step

Tell me what
you have in mind.

A rough idea is enough. Pick a time on my calendar and let’s find the right first step for your project.

เล่าไอเดียเป็นภาษาไทยได้เลยครับ

Choose your time ↗

Prefer email? Send your goal, budget and ideal start date directly.

Your first conversation30 min

Big ideas start
with a small hello.

Bring your idea, your questions, or the workflow that’s been slowing you down.

  • Talk through what you want to build
  • Explore a sensible scope and budget
  • Leave with a clear next step
Book a project call ↗

Choose an available time in your timezone on Cal.com.

Prefer to send a project brief first?

This prepares an email to Big. Send it from your email app to request a call. Your time is confirmed personally by email.

A few practical things

Before we begin.

Can we talk before I commit?

Yes. Book a 30-minute project call to discuss the problem, your budget and the right first step. There is no payment required to request a call.

What happens after the call?

You receive a written scope, price, timeline and payment milestones. Work starts after we agree the scope and the kickoff payment is made.

What do you need from me?

One person who can approve decisions, your existing assets and content, and time to review the demo. Delivery estimates begin once the agreed inputs are ready.

Who owns the finished work?

The agreed source code and project documentation are handed over after full payment. Hosting, domains and third-party services are listed separately in your quote.

What happens after launch?

Builds include a 14-day window for fixes to defects in the agreed scope. Ongoing maintenance and new features can be scoped separately.

Can we work in Thai?

ได้ครับ คุยรายละเอียดและทำงานร่วมกันได้ทั้งภาษาไทยและภาษาอังกฤษ