You will get I'll build your custom web tool or dashboard in 72 hours
Project details
You have a process that wastes time. A spreadsheet that breaks. A report you pull by hand. A workflow nobody documented. I'll replace it with a working web tool - real database, real URL, works on any device - in 72 hours or less.
I'm a developer (currently completing CS) and real estate bookkeeper (over 4 years of experience) who builds with Supabase, JavaScript, Python, Resend, React, and Vercel. My own product, DealSharp, is over 33,000 lines of code, 22 integrated tools, live paying users - built in 15 days solo. My other product, FollowUpOS, is over 6,000 lines of code, a Google Extension for LinkedIn, and AI-built in. Livbe paying users - built in two days solo.
I build internal dashboards, client portals, deal calculators, lead trackers, automated reports, and lightweight SaaS MVPs. Fixed price. Clear scope. No surprises. Message me before ordering - 2–3 sentences about what you need, and I'll confirm fit within the hour.
I'm a developer (currently completing CS) and real estate bookkeeper (over 4 years of experience) who builds with Supabase, JavaScript, Python, Resend, React, and Vercel. My own product, DealSharp, is over 33,000 lines of code, 22 integrated tools, live paying users - built in 15 days solo. My other product, FollowUpOS, is over 6,000 lines of code, a Google Extension for LinkedIn, and AI-built in. Livbe paying users - built in two days solo.
I build internal dashboards, client portals, deal calculators, lead trackers, automated reports, and lightweight SaaS MVPs. Fixed price. Clear scope. No surprises. Message me before ordering - 2–3 sentences about what you need, and I'll confirm fit within the hour.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$350
|
Standard
$750
|
Advanced
$1,500
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 10 days |
Number of Revisions | 2 | 3 | 5 |
Number of Pages | 1 | 5 | 10 |
Design Customization | |||
Content Upload | - | ||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
AI integration (OpenAI/Anthropic)
(+ 2 Days)
+$200
Stripe payment setup
(+ 1 Day)
+$150
Extra revision round
(+ 1 Day)
+$75Frequently asked questions
About Fabian
I Build Custom SaaS in Days, Not Months | AI-Native Developer
Jarandilla de la Vera, Spain - 3:02 pm local time
My background is unconventional, and I think that's an advantage. I spent three years running a bookkeeping and financial operations business. I still do. That means I understand how real businesses work before I write a single line of anything. When I build an internal tool, a client portal, or a SaaS MVP for someone, I'm not just thinking about buttons and screens. I'm thinking about the workflow behind it, the data model, and what the person using it actually needs to get done.
My stack is Supabase plus Vercel plus AI-assisted development (Lovable, Claude, Perplexity, Gemini). I use it to ship fast without cutting corners on quality.
My own product — DealSharp (dealsharp.app), a real estate deal intelligence and financial management SaaS — is live, in use, and built on this exact stack. 33,000+ lines of code. 22 integrated tools. 4 AI personas. Full bookkeeping suite, tax engine, portfolio stress testing. Multi-tenant database, row-level security, user auth, subscription billing, deployment pipelines. I solved those problems on my own product, which means I won't be solving them for the first time on yours.
I work with founders who have an idea and need it validated quickly. I work with small businesses that need an internal tool their team will actually use. I work with people who went to a traditional developer, got quoted three months and $15,000, and thought there had to be a better way. There usually is.
What I build well:
MVP web applications from idea to deployed product
Internal tools, dashboards, and client portals
SaaS prototypes with auth, database, and billing
Supabase backends wired to custom frontends
AI-integrated workflows (OpenAI, Anthropic, prompt orchestration)
Automations that replace manual processes
What I won't build:
Native mobile apps (web-responsive only)
Clones of existing products with no real differentiation
Anything predatory or targeting vulnerable users
Pricing:
Small tools, calculators, landing pages: $500 to $2,500 fixed
Full web apps, client portals, MVPs: $3,000 to $10,000 fixed
Ongoing work or hourly consulting: $65/hour
I'm based in Jarandilla de la Vera, Spain. I work in EU and US Eastern time zones. Fluent in English, Spanish, and Polish, which comes in handy more often than you'd think for European and American clients.
I don't take on projects I can't deliver. If something is outside what I can build well, I'll tell you upfront. If it's a fit, I move fast, communicate clearly, and hand you something you can actually use.
I also run Profit Clarity Advantage, specialized real estate bookkeeping for US operators. QuickBooks ProAdvisor Level 2 certified. If that's what you need instead of development work, I can help with that too. Mention it when you message.
Message me before ordering. I want to make sure we're the right fit before either of us commits time.
Steps for completing your project
After purchasing the project, send requirements so Fabian can start the project.
Delivery time starts when Fabian receives requirements from you.
Fabian works on your project following the steps below.
Revisions may occur after the delivery date.
Step one
You submit your requirements - what the tool does, who uses it, and any existing data or brand assets.
Step two
I confirm the scope and send a brief outline of what I'll build within 24 hours.