Custom Business Software
Custom Business Software Development
The System Your Business Runs On, Built to Fit
Most businesses outgrow their spreadsheet long before they admit it. I build the internal system that replaces it - inventory and purchasing, order management, approval flows, a customer portal, a management dashboard - designed around your operation and connected to the tools you already pay for.
Key takeaways
- The signal you have outgrown the spreadsheet is usually concurrency: two people editing, and one of them loses work.
- Build the one workflow that hurts most first. A system that replaces everything at once takes longer and lands worse.
- Roles and permissions are a day-one requirement, not a phase two - retrofitting them touches every screen.
- An internal tool nobody monitors quietly rots. Every build ships with logging and alerting so failures surface.
What I build
- Inventory and purchasing systems with SKU-level tracking
- Order management, approval flows and document workflows
- Back-office and admin panels for the team, not for developers
- Customer portals so clients self-serve instead of emailing you
- Management dashboards and scheduled reporting
- Integration with your ERP, CRM, invoicing and Microsoft 365 / Google Workspace
What it costs
Custom CRM or internal system
$5,000 - $28,000
3 - 8 weeks
Contacts, pipeline, roles, automation, integrations you own outright
Ranges exclude VAT and third-party costs. Every project gets a fixed quote after a scoping call. All pricing · The full guide
Projects I built
ARCS Dental - Inventory & Purchasing System
Tablet counting UI + Flask API + Playwright/Henry Schein cart automation - end-to-end with documented handover.
PDF Signature Platform
Self-hosted DocuSign alternative with proper Hebrew rendering - visual field placement, signer link, pdf-lib + fontkit fill.
Google Apps Script Data Manager
Dual-surface (sheet modal + web app) data manager with column whitelists for safe partial editing.
How it works
A short scoping call
What hurts today, what you already use, and what "done" looks like.
A written fixed-price quote
Scope, price and timeline in writing, approved before any work starts.
Built in stages, on your real data
You see a working first version early, not a demo at the end.
Handover with documentation and monitoring
You own the code and the data, and a support window follows launch.
Working with me from the US or Europe
- Most of my client work is for companies in the US, UK, Germany, the Netherlands and Australia.
- Calls are in English and scheduled in your time zone. My working day covers most of the European one and the US East Coast morning.
- A fixed price in US dollars, agreed in writing before any work starts.
- Pay me directly, or hire me through Upwork if you prefer to work through a platform.
- You own the code and the data, with documentation and a support window after launch.
Guides on this
Practical guides from real client work.
Custom Software vs Off-the-Shelf: When a Small Business Needs a Custom System
Custom software vs off-the-shelf is rarely about features. I break down when SaaS is right, when you have outgrown it, and a clear build vs buy framework.
From Idea to MVP: How to Build an MVP (And What It Costs)
A practical guide to how to build an MVP: scoping must-haves vs later, realistic MVP development cost and timeline, and how AI now ships your idea in weeks.
Hiring a Developer to Build Your MVP: Freelancer vs Agency vs In-House
Hiring a developer to build your MVP? A practical comparison of freelancer vs agency vs in-house on cost, speed, risk, and control, plus red flags and how to structure the deal.
Signs Your Business Has Outgrown Spreadsheets (Time for a Custom App)
Has your business outgrown spreadsheets? The concrete signs it is time to replace spreadsheets with a custom app, the real cost and timeline to build one, and how AI made it affordable.
No-Code vs Custom Code for Building Your App or MVP
No-code vs custom code for apps: what each is good at, real cost and speed early vs total cost of ownership, the no-code ceiling and lock-in, and when to pick which.
How to Validate Your Idea Before You Build It
How to validate a startup idea before building: why validation saves money, talking to real customers, the smoke test, pre-sales, a manual concierge version, and the signals that justify building.
What Is an MVP, Really? Common Mistakes Founders Make
What is an MVP, really? A clear definition of minimum viable product, what an MVP is not, good vs bad examples, and the most common mistakes founders make.
How to Choose the Right Tech Stack for Your MVP
How to choose a tech stack for your MVP without overthinking it: the principles that matter, a sensible default stack, when to deviate, and what not to optimize for too early.
Is Vibe Coding Production-Ready? A Developer's Honest Take
Is vibe coding production-ready? An honest developer's take on what vibe coding is great at, where it breaks, and a prototype-vs-production checklist.
Frequently asked questions
How is this different from buying a product?
A product is cheaper and faster when your process looks like everyone else's. Custom pays off when it does not - when the workflow, the pricing rules or the approvals are specific to how you operate, or when three separate products would each cover a third of the job.
How long does a first version take?
A focused first module - one workflow, real data, real users - is usually weeks rather than months. Scope is what moves that number, so the first conversation is about cutting the scope to the part that pays for itself first.
What happens to the spreadsheet we use today?
It becomes the first migration. The existing sheet is usually the best specification you have - it shows the real fields, the real edge cases and the workarounds people invented. I read it before designing anything.
Sources
Official documentation you can verify the claims on this page against.
Let us scope your project
Tell me what you need and I will give you an honest scope, price, and timeline.