Senior-led delivery
Every engagement is led by an engineer who ships, not a manager who reports on people who ship. The person in your first call is the person in your codebase.
Tech Solutions at AI Speed
Ship your software inweeks, not quarters
A software consulting studio in Orlando. Fixed scope, fixed price, and most engagements live in four weeks — because we build on a platform we already own.
- 4 weeks average delivery
- Fixed price
- Working software every Friday
20
Practice Areas
under one roof
140
Capabilities
all in-house
5
Projects Delivered
written up as case studies
4 weeks
Average Delivery
fixed scope, fixed price
Built with, and fluent in
- TypeScript
- JavaScript
- React
- Next.js
- Node.js
- NestJS
- React Native
- Expo
- Tailwind CSS
- shadcn/ui
- Radix UI
- Figma
- PostgreSQL
- Prisma
- SQLite
- Redis
- BullMQ
- GraphQL
- REST
- WebSockets
- Python
- Docker
- Kubernetes
- Terraform
- SST
- AWS
- Vercel
- Cloudflare
- Fly.io
- GitHub Actions
- Playwright
- Vitest
- Jest
- k6
- axe-core
- OpenTelemetry
- Sentry
- Storybook
- Claude
- OpenAI
- Llama
- pgvector
- Stripe
- Stripe Terminal
- Adyen
- Authorize.net
- Square
- Toast
- Clover
- Lightspeed
- Shopify
- WooCommerce
- WordPress
- QuickBooks
- Xero
- NetSuite
- HubSpot
- Salesforce
- Pipedrive
- Auth.js
- Auth0
- Okta
- Entra ID
- SAML
- OIDC
- SCIM
- Twilio
- Resend
- Customer.io
- GA4
- Search Console
- Schema.org
- JSON-LD
- dbt
- BigQuery
- DuckDB
- Metabase
- Looker Studio
- Dependabot
Our Services
12 services, grouped by how you buy them. Whatever it is, it starts with a written scope and one fixed number.
Connect & modernise
Fixed-price project
Making what you already own work properly, or replacing it safely.
Learn MoreRun it
Project, then optional retainer
The infrastructure underneath, and keeping it standing afterwards.
Learn MoreBefore you build
Short fixed engagement
Working out what it is, and whether it is worth doing.
Learn MoreNot sure which one?
Most engagements combine two or three — one scope, one schedule, one number and one point of contact.
Capabilities
The depth is the whole argument.
A freelancer can build you a web application. What they cannot do is handle the payment reconciliation behind it, the per-location permissions it needs at your second site, the migration off the system it replaces, and the monitoring that tells you when it breaks at two in the morning.
All of it sits in house, across 6 disciplines. Most engagements draw on four or five at once, and you are quoted a single number for the outcome rather than a line item per speciality.
Browse all 20 practice areas
Each one has a page of its own: what it covers, the positions we hold on it, and what we have used it on.
The Sill platform
Every project starts at sixty per cent.
Most firms quote three months because they rebuild the same plumbing every time — logins, permissions, billing, admin screens. Work that has nothing to do with your business, billed to you anyway.
Sill is our delivery platform. It is the layer every Sillstack engagement is built on, and it is already in production — handling real users and real money on live projects, every day.
Your engagement adds the part that is actually yours. That is the entire mechanism behind the four-week quote, and there is no second one.
See what runs on it40% · built for you
Your product
60% · already running
Accounts
Permissions
Billing
Notifications
Admin
Audit log
Multi-tenancy
Jobs
Sill · maintained continuously
We wrote every line of Sill and we maintain it. When we harden it on one project, that work lands in your build too — same engineers, same codebase, all year.
Work That Shipped
Systems we designed, shipped and still operate, with12 reusable components behind them. Each is written up as a case study — and one of them you can open in a browser right now.
Each has a page with the problem, how it was built, and the part that was actually hard to get right.
See all our workIndustries
The same problems, wearing different uniforms.
A restaurant group, a distributor and a property manager describe their situation in completely different words and then turn out to need the same four things built.
We work across 12 sectors. Each has a page saying what that industry actually needs and naming the system we proved it in, so you can judge how well it transfers rather than taking our word for it.
What we are actually good at
- Authority changes depending on which site somebody is standing in
- Stock in the system has to agree with stock on the shelf
- Money has to reconcile, daily, without a person doing it
- The software gets used somewhere with no signal
Three Ways In
A week of thinking, a build with a date on it, or somebody on hand after launch. Each differs in how long it runs, how it is billed, and how easily you can stop.
Discovery sprint
One to two weeks
Fixed engagement
For when you know the problem but not the shape of the solution. You leave with a written spec and a fixed quote for the build — usable even if you build it elsewhere.
- Systems and access audit
- Written technical specification
- Fixed quote for the build
- Yours to keep either way
Most engagements
Build
Four weeks, typically
Fixed-price project
The main engagement. Fixed scope, fixed price, live at the end of it. You see working software every Friday, not a status report.
- Fixed scope and fixed price
- Weekly working demos
- Ships on the Sill platform
- Training and handover included
Retainer
Rolling, 30 days' notice
Monthly retainer
Ongoing work after launch, or search visibility that compounds month over month. Cancel when the numbers stop moving.
- Fixes, changes and monitoring
- SEO and GEO programmes
- Plain-language monthly reporting
- No long lock-in
We quote a fixed number against a written scope rather than from a rate card, and it does not move after you sign. Every service page says what that scope usually covers once you know which one you are looking at.
How It Works
Four weeks, in order. Average, not best case — mobile runs four to six because app store review is outside anybody’s control.
1
1
Week 1 · Scope
We watch how the work happens today, get access to your systems, and write a specification you sign. Screens, rules, edge cases, and an explicit list of what is out of scope.
Your time: Two or three hours: a walkthrough of your process, and reading the spec properly before signing it.
A signed spec and a fixed price
2
2
Week 2 · Build
Core data model, authentication and the primary workflow. Accounts, permissions and billing already exist on our platform, so week two starts at the part that is actually yours.
Your time: Friday demo, about an hour. You click a real thing with your real data in it.
Working software, not a percentage
3
3
Week 3 · Build
Reporting, permissions, integrations and the edge cases that only surface once somebody has used it. This is the week where the things you did not think of get caught.
Your time: Second Friday demo, plus decisions on anything the first demo raised.
Feature-complete against the spec
4
4
Week 4 · Ship
Deployment, monitoring, migration of your existing data, two recorded training sessions, and documentation written for people rather than engineers.
Your time: Training attendance, and a decision on who owns it internally.
Live, plus 30 days of fixes
Four weeks of our time, not yours: roughly three hours a week. The most common cause of delay is waiting for a decision, so we ask for one named person who can make them.
Why Choose Sillstack?
Every firm says it is fast and senior and secure. Here is what we actually do differently, with the downside written next to it.
Fixed price against a written scope
Not: Hourly, estimated optimistically
Costs you: It needs a real week of scoping before anything gets built.
The engineer who scoped it builds it
Not: Sold by one team, delivered by another
Costs you: We run fewer engagements at once, so there is sometimes a wait.
Built on a platform we already maintain
Not: Plumbing rebuilt from scratch, billed to you
Costs you: It is our architecture. If you need a different one, we are the wrong firm.
An honest no when we are wrong for it
Not: A proposal for whatever you asked for
Costs you: We turn down work, which is why the recommendation is worth something.
Every one of them costs you something. Any firm can list four advantages; the useful part is what each one is paid for with. How we work
Technology
Nobody Is Technology Agnostic
Every firm claiming otherwise has a stack they reach for by default. Ours is TypeScript on the Sill platform. Here is exactly when we use yours instead, and when you should hire somebody else.
If you have a team who knows your stack
We work in yours
Django, Rails, .NET, Laravel, Go. If your engineers maintain it after we leave, their familiarity is worth more than any efficiency we would gain by moving you.
If you are starting from nothing
We use ours
TypeScript end to end on the Sill platform, because that is where sixty per cent of the build already exists. This is where our defaults save you real money.
If you have a system that works but is unloved
We extend rather than replace
A layer in front, new work against a clean interface, old system untouched. Replacing something that functions because it is unfashionable is how budgets disappear.
If you want an architecture Sill does not support
We are the wrong firm
A different language, a hosting arrangement we do not run, a design we think is a mistake. We would rather say that on the first call.
Defaults, Not Lock-In
You own the repository, the documentation and the infrastructure accounts from day one. If your team takes it over, nothing about it depends on us.
What we work withTypeScriptNext.jsReact NativeExpoNode.jsNestJSPostgreSQLPythonStripeDockerAWSVercel
Delivery model
Senior-led, start to finish.
Large firms run layered delivery because it is the only way to operate hundreds of engagements simultaneously. It works at that scale, and it costs the client context at every layer.
We operate a concentrated model instead: fewer engagements, each one owned end to end by the engineers delivering it. Decisions get made by people who understand the consequences.
Continuous ownership
One team carries your project from scope through to handover. Context accumulates instead of being rewritten every time the work changes hands.
Direct engineering access
You have the contact details of the people building your software. Questions get answered by whoever wrote the thing you're asking about.
Deliberate capacity
We take on a small number of engagements at a time and turn down work we're not the right fit for. It's the reason timelines hold.
What We’ve Learned Shipping
Written by the people doing the work, about problems we actually hit.
Data & Integration7 min read
The Data Migration Is the Project
Replacing a system is mostly moving its data, and that part is a business decision rather than a technical one. Why migrations overrun, and how to scope one honestly.
Sep 20, 2026
Search & Marketing8 min read
How to Audit Your Own AI Search Visibility in an Afternoon
Before paying anyone for GEO, run the check yourself. Six questions to ask the assistants about your own market, and how to read what comes back.
Sep 19, 2026
How We Work8 min read
What Actually Goes in a Software Specification
A specification you can quote against is not a wish list. Here is what a useful one contains, what it deliberately leaves out, and how to tell a weak one.
Sep 17, 2026
Get in Touch
Tell us what you’re trying to build. We’ll come back within one business day with a scope, a number and a date — or an honest no if we’re not the right people for it.
Phone
+1 (407) 796-2376Reply time
One business day, from an engineer
Based in
Orlando, Florida · serving the United States
What happens next
- A reply within one business day, from an engineer
- A thirty-minute call, with no qualifying call before it
- A written scope and a fixed number, if it fits
Let’s Scope It on One Call
Thirty minutes. You’ll leave with a number and a date, whether or not you end up working with us — and if it’s not a fit, we’ll say so on that call.