D&S Tech · Paterson, NJ
Software, apps and the servers they run on.
We design, build and operate web platforms, mobile and desktop apps, AI features and infrastructure — choosing the stack for the problem, not the other way around.
In production today
- chapters published
- 140,000+
- items in the cost book
- 24,000+
- API endpoints in one SaaS
- 320+
- languages shipped
- 15
NovelPress
MEPSub
MEPSub
NovelPress
What we build
From the first sketch to production servers — one team, end to end.
Web applications & SaaS
Customer portals, multi-tenant SaaS and internal platforms — on SvelteKit, Laravel or Next.js, whichever fits the product.
Learn more →Mobile & desktop apps
One product on web, phone and desktop — shared code where it helps, native where it matters.
Learn more →Admin panels & internal tools
Back offices your team will actually use: approvals, data entry, reporting and permissions, built fast and built to last.
Learn more →AI features & automation
Practical AI inside your product — agents that read documents and drawings, answer questions and do the tedious work, with a human in control.
Learn more →- Supply air
- 55.2 °F
- Zone temp
- 71.8 °F
- CHW valve
- 42 %
- Static
- 1.25 in.wc
- Fan
- ON
- Mode
- Occupied
Building automation software
Software for the controls world, built by people who have commissioned it — BMS integrations, submittal tooling and site operations.
Learn more →Infrastructure & DevOps
We run our own hardware and hosting, so we build software that behaves in production — and we can run yours too.
Learn more →Why D&S
Stack-agnostic. Opinionated about outcomes.
We ship on TypeScript, PHP, Python and .NET. We pick what fits the product and the team that will own it — and because we run our own infrastructure, we care how it behaves long after launch.
The right tool per job
SvelteKit for a fast app, Laravel + Filament for a heavy back office, Tauri for the desktop, Python where the data lives.
We run production
Our own Proxmox clusters, backups, monitoring and email delivery. Hosting is part of the job, not an afterthought.
Built by operators
Decades of field work in HVAC and building controls. We build for how field businesses actually work.
No hand-offs
Product, design, code and infrastructure in one team — the people who scope it are the people who ship it.
Selected work
All projects →
In-house product
MEPSub →
One system for MEP contractors — estimating, field service, projects, invoicing and an AI agent that does takeoffs from drawings. Web, mobile and desktop from a single codebase.
In-house product
NovelPress →
A web-novel publishing platform with author onboarding, reader analytics, bulk chapter imports and 15 languages — 140,000+ chapters online.
Bold Mechanical & Controls · 2026
boldmech.com →
Marketing site and block-based CMS for a mechanical and controls contractor — live BMS network visuals, versioned pages and a real bid/service request pipeline.
AI that shows its work
An agent that counts, points, and asks.
This is how the takeoff agent we built for MEPSub works: it reads the drawing, links every quantity to where it was measured, and asks instead of guessing when something is unclear. We build the same kind of AI into other products.
- → Hover a line on the right to see where it was counted.
- → Answer the agent's question to finish the count.
Illustration · simplified drawing
Quantities
2 tags read “VAV-2A”. Typo for VAV-2, or a second box type?
How we work
From sketch to server.
-
01
Discover & sketch
We map the workflow, agree on scope for a first release and sketch the screens together.
-
02
Design the interface
The sketch becomes a real, clickable interface you can react to early — before it is expensive to change.
-
03
Build on the right stack
SvelteKit, Laravel, Python or .NET — whatever fits. Weekly demos on a live staging environment.
-
04
Ship & run
Deployed to our own infrastructure or yours, with monitoring, backups and updates after launch.
Tools we use in production
Not a wish list — this is what our own products and client systems run on today.
Web & apps
Mobile & desktop
Backend & data
AI
Infrastructure
Building automation
Hover a marked technology to see where it runs in production.