I build the software your team logs into every day.
I'm Leon Vismer, a full-stack Laravel developer. I design and build business web applications — internal tools, client portals and SaaS platforms — that quietly run real operations.
Why the portfolio is short
My best work is behind a username and password.
Most of what I build isn't a marketing site you can click through. It's the operational software a business runs on — and that means it's private by design.
Behind authentication
Dashboards, portals and admin panels only exist after sign-in, scoped to a client's staff or customers.
Covered by agreements
Client data, processes and even the existence of some systems are confidential.
Built for internal teams
The users are dispatchers, accountants and managers — not the public web.
Dispatch & fleet operations platform
Approvals & reconciliation portal
Patient scheduling & intake system
Production tracking & QA dashboards
Client portal with document vault
Inventory & supplier management
So I rebuilt the patterns in the open.
Fully interactive sample apps using fictional data — the same building blocks as the real thing.
Sample apps
Click around. Nothing is a screenshot.
Each sample is a working Livewire application. Search, sort, drag, filter and submit forms — exactly like the private systems they represent.
Capabilities
Everything a serious business application needs.
Multi-tenant SaaS
Tenant isolation, per-account settings, plans and billing — architected so one codebase serves every customer safely.
Auth & permissions
SSO, passkeys, 2FA, teams, roles and fine-grained policies that mirror how the business actually works.
Workflows & approvals
Multi-step processes, state machines, notifications and audit trails that replace spreadsheets and email chains.
Dashboards & reporting
Fast aggregate queries, charts and exports that leadership actually opens — from KPIs to drill-down detail.
Integrations & APIs
Payment providers, accounting systems, CRMs and webhooks — robust, queued and retry-safe.
Performance & reliability
Queues, caching, monitoring and tests so the app stays quick and boring in production.
Responsive by default
Interfaces that work on a warehouse tablet as well as a finance desktop.
And the unglamorous bits
Migrations, imports, backups, documentation and handover.
Process
From how it's done today to software people rely on.
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01
Discover
We map the process, the people and the pain. I ask a lot of questions so the software fits the business — not the other way round.
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02
Design
Data model, permissions and clickable screens early, so feedback is cheap and surprises are rare.
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03
Build
Short iterations on a staging environment you can log into. You see progress weekly, not at the end.
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04
Support
Launch, monitoring and ongoing improvements. Most of my clients stay for years.
Want to see the real thing?
I'm happy to walk you through production systems over a screen share, within the bounds of client confidentiality. Or tell me about the application you need built.