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Fiverr Pro
English
$
USD
I will build a custom internal tool or business app
Sergey Z.
About this gig
I build production-ready internal tools and business apps with Next.js (App Router), TypeScript, Supabase (Postgres + Auth + Storage), and Row Level Security the same stack I use for my own agency CRM. (Video)
My own Agency CRM covers:
production agency CRM clients, projects, tickets, quotes/order/sinvoices, contracts, approvals, calendar, time quotas, global search, audit log. Three roles, RLS-secured, Notification System, Ticket-System, Bot Security, WAF, Rate Limiting
Use cases I cover:
CRM Admin Dashboard Internal Tool Booking System Inventory Multi-Tenant SaaS MVP Customer Portal
What you get
- Clean TypeScript codebase you own no vendor lock-in
- Real role-based access via RLS, not just frontend checks
- Invite-only auth, customer portal optional
- Migrations, seed data, README, .env.example
- Optional deploy to Vercel + Supabase Cloud
Why me
- Live production CRM as proof (video)
- RLS on every table, service_role never in the client
- Honest scoping before you order no surprise bloat
Before ordering: message me your use case. I'll confirm fit + timeline within hours. For custom requirements just text me.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Sergey Z.
Sergey Z.
I build websites and digital systems for real business workflows
- FromGermany
- Member sinceFeb 2023
- Avg. response time1 hour
Languages
English, German, Russian
I build modern websites, dashboards, client portals and custom web applications for businesses that need more than just a basic page. I believe complex digital systems should not only be available to companies with 5- or 6-figure budgets. Small businesses, agencies and service providers also deserve professional tools that help them save time, organize clients and work more efficiently. Your idea may be complex. The final product should feel simple.
Other Website Development Services I Offer
FAQ
Do I own the code?
Yes. Pushed to your GitHub or zipped
Will it scale?
Production-grade. Supabase + Vercel handle it.
Can I extend it later?
Yes — clean TypeScript, documented schema.
Do you maintain it after delivery?
As a separate hourly add-on
What's the difference vs. no-code (Bubble, Glide)?
You own real code, no monthly platform tax, no vendor lock, no performance ceiling.
