Custom software that fits your business, not the other way around
I build web applications, iOS apps, internal tools, and integrations for businesses that need more than off-the-shelf SaaS. We agree the scope, milestones, investment and ongoing support before work starts. Work directly with the engineer who designs and builds it.
Why custom software vs. off-the-shelf tools
Custom software is built around your process, not a vendor's generic checklist. The decision depends on how well existing tools meet the need, the cost of maintaining a custom system and the integrations required. Ownership, licensing and handoff are part of the scope.
Off-the-shelf tools work fine for common problems. But if you're doing something unique — managing a proprietary workflow, integrating multiple systems, or moving fast in a competitive market — custom software is the right move.
What can we build?
Custom CRMs
A customer relationship system tailored to your sales process, integrations, and data model — not a generic SaaS template.
Web applications
React/Next.js applications and dashboards that run entirely on your terms: client portals, internal tools, data platforms.
Native iOS apps
SwiftUI apps for iPhone and iPad — shipped to the App Store or deployed as internal tools for your team.
Internal tools & dashboards
Audit dashboards, data management interfaces, and admin tools that save your team hours per week.
API integrations
Connect the systems you already use — billing, email, payment processors, analytics — without manual work.
Database design & migration
Postgres/Supabase schemas, data pipelines, and migrations that scale without technical debt.
Tech stack:
Why work with Zachary Vorsteg
I'm a software engineer and AI systems architect, and the founder of CustomLab.ai. My work includes Trusenda, a CRM available on the App Store, along with business applications and integrations.
- You work directly with the engineer who designs and builds your software — no account managers or middlemen.
- Scope, milestones and investment are agreed before work begins; changes are discussed before they are added.
- The tools are chosen around the workflow, integration needs and maintenance requirements.
- Systems engineering discipline: your software is built to last, monitored, and maintainable.
- Ownership, third-party licensing, handoff and support are documented in the scope.
Frequently asked questions
What is custom software development?
Custom software is an application designed around a specific business workflow. It can connect existing tools or support a process they do not handle well. We compare the build and maintenance costs with available software before choosing a direction.
When do I need custom software instead of off-the-shelf SaaS?
Consider custom software when a specific process or integration need is difficult to meet with existing tools. We first check whether configuring or connecting the software you already use can solve the problem.
How long does a custom software project take?
Timing depends on scope, integrations, data migration and testing. We agree the deliverables, milestones, investment, ownership and any ongoing support before work starts.
Who is Zachary Vorsteg?
Zachary Vorsteg is a software engineer and AI systems architect in West Palm Beach, Florida. His work includes Trusenda, a CRM available on the App Store. Clients work directly with the person designing and building the software.
Build software that's actually yours
Tell me what you're trying to do and where off-the-shelf tools fall short. If it's a good fit for custom development, I'll show you the scope, timeline, and cost up front.
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