SaaS500+
daily active users
SaaS Analytics
A reporting dashboard that replaced a fortnightly spreadsheet ritual nobody enjoyed and everybody depended on.
- Custom dashboard
- Data viz
- Next.js
Custom development
Software for the parts of your business a spreadsheet outgrew
Client portals, internal dashboards, booking systems, quoting tools, and the API work that stops your team copying data between four tabs. Built to be handed over, not to keep you dependent on us.
Custom Development
6–10
Weeks to first release
Working software, not a prototype.
0
Week sprint cycle
You see progress every fortnight.
100%
Code ownership
Your repo, your licence, from day one.
The short version
Custom web application development
There's a moment in most growing businesses where the shared spreadsheet stops being clever and starts being a liability. Two people edit the same row. Someone's on an old copy. The one person who understands the formulas goes on holiday.
We build the replacement: a real application with roles and permissions, an audit trail, validation that catches bad data at entry, and a database that can be queried. Usually Next.js and Postgres, sometimes alongside whatever you already run.
We're deliberate about scope. The first release covers the workflow that hurts most, ships in six to ten weeks, and gets used before we build phase two. Long specification documents describing a perfect system tend to produce software nobody wanted by the time it arrives.
What you end up with
- One source of truth instead of four spreadsheet copies
- Role-based access, so people see what they should and nothing else
- Integrations with the tools you already pay for rather than replacements for them
- Documented code and a handover plan — you're not locked in
Scope
What we build
Internal dashboards
Operational views over your real data — pipeline, capacity, margin — instead of a monthly export into a chart nobody trusts.
Client portals
Authenticated areas where customers see their own documents, jobs, invoices, or progress. Fewer status emails for your team.
API and integration work
Connecting CRM, accounting, inventory, and email so a record entered once appears everywhere. Webhooks, queues, and retries done properly.
Booking and scheduling
Availability rules, capacity limits, reminders, rescheduling, and calendar sync — the details that make or break a booking flow.
Data modelling and migration
Schema design, then a careful migration from the spreadsheets and legacy tables, with reconciliation you can check.
Auth, roles, and audit
SSO or email auth, granular permissions, and a log of who changed what. Necessary the moment more than five people touch the system.
How it runs
The process, stage by stage
- 01
Workflow mapping
We sit with the people doing the job and write down what actually happens — including the workarounds nobody documented.
- 02
Scope the first release
The narrowest slice that's genuinely useful on its own. Everything else goes on a phase-two list, visibly.
- 03
Build in two-week cycles
Working software on a staging URL every fortnight. You use it and tell us what's wrong while it's still cheap to change.
- 04
Migrate and pilot
Real data in, then a small group runs it in parallel with the old process for a week or two.
- 05
Roll out and hand over
Full rollout, documentation, and a support window. If you have developers, we bring them in during build rather than at the end.
Tools
What we build it with
Picked per project, not per fashion cycle. Here's the usual shortlist and why each one is on it.
- Next.js
- One codebase for UI and API routes
- PostgreSQL
- Relational data with real constraints
- Prisma
- Typed queries and versioned migrations
- TypeScript
- Types shared between client and server
- Auth.js
- SSO, email, and role-based access
- Stripe
- Payments, subscriptions, and invoicing
- Playwright
- Automated tests on critical paths
- Railway / Vercel
- Managed hosting without a platform team
Proof
Custom Development in practice
Real projects, with the numbers and the parts that took longer than planned.
They spent the first week sitting with our analysts instead of with me, which I'll admit I questioned at the time. It's where they found a timezone bug that was causing half the manual work. The dashboard saves us about nine hours a week and our clients log in themselves now.
Sectors
Where we've done this before
Industry context changes the brief. These are the ones whose pitfalls we already know.
Pairs well with
Services that usually run alongside this one
Further reading
How we think about this
Written by the people who do the work.
Development10 min read
Next.js App Router: Practices That Hold Up in Production
Server components, caching, data fetching, and the four mistakes we've made on real App Router projects so you don't have to repeat them.
Read itDevelopment9 min read
The Automation That Earns Its Keep (And the Kind That Doesn't)
Six things we automated that saved real hours, two we built and deleted, and the rule we use to decide which is which.
Read itBusiness10 min read
How Much Does a Website Cost? Real Numbers, 2026
Actual ranges from projects we've delivered, what moves a quote up or down, the ongoing costs nobody mentions, and where cheap turns expensive.
Read itQuestions
The things people ask before we start
Often, yes — and we'll say so. If Airtable, HubSpot, or a vertical SaaS product covers 80% of what you need, buy it. Custom development earns its keep when your process is genuinely a competitive advantage, or when licence costs across a large team have overtaken the cost of building.
Next step
Let's talk about custom development
Tell us what the site needs to do. You'll get a straight answer on scope, timeline and cost — usually inside one working day.
Rather write first?hello@quesiono.com— we reply within one business day.