01
Marketing websites
Fast, distinctive sites built to convert — without starting from yet another generic template.
Next.jsCMSSEO
Two developers · one studio
Systems
André Martins
Surfaces
Ian Machado
We design and build apps and websites for small and medium businesses — two people, end to end, accountable for the whole thing.
Viana · working with clients everywhere
Checking the calendar…§ About the studio
Two developers.Two ways of thinking.One result.
Balance between logic and detail.
§ Voices
Two ways of seeing the same problem.
We are two people. You talk to the people building it.
§ What we build
Small teams get the whole thing, not a slice of it.
Most projects take four to twelve weeks. You meet with us, we ship with you, and the code ends up yours.
02
Web applications
Dashboards, management systems, bookings and internal tools. Custom software for what your business actually needs.
ReactPrismaAuth
03
Mobile apps
Cross-platform apps with a native look and feel, developed and published straight to your account.
React NativeExpo
04
Automation & APIs
We connect the tools you already use, automate processes and take care of the repetitive tasks that cost you time.
IntegrationsScripts
48
projects shipped
6
building together
4h
average first reply
§ Selected work
A few things we shipped recently.
Real projects, with the numbers that mattered to the people who hired us.
01 / 04
E-commerce2025
5.5×
weekly orders
Mercado Verde
A farmers' co-op that sells out by Friday.
Replaced a spreadsheet-and-email ordering flow with a Next.js storefront synced to their inventory. Orders went from 40 a week to 220.
Next.jsStripeSupabase
02 / 04
Booking system2024
-52%
phone calls
Clínica Mar
A clinic that stopped losing patients to voicemail.
A booking portal that handles 6 practitioners, insurance lookups, and SMS reminders. Front-desk calls dropped by half.
ReactPrismaTwilio
03 / 04
Internal tool2024
8min
avg. quote time
Oficina 12
A workshop that quotes jobs in minutes, not days.
An internal quoting tool that pulls parts from three suppliers and writes the estimate as a PDF. What took a morning now takes a coffee.
Next.jsPDFREST
04 / 04
Marketing site2025
+38%
direct bookings
Casa Alta
A boutique hotel that finally looks like itself.
A hand-built site with a booking flow into their PMS. Direct bookings up, OTA commissions down — they keep more of each room.
AstroCMSSEO
§ Why Duality
Built differently. On purpose.
01
No templates
Every site is designed around the business, not adapted from something we've already built.
02
Direct collaboration
You work directly with the people designing and building your site. No layers of account managers.
03
Built to last
Fast, responsive and easy to maintain. We build for the long term, not just launch day.
§ How we work
Three steps. No mystery.
- 01Week 1
Discovery
A call, a shared document, and a defined quote. You know exactly what we're building, what you're investing, and when it will be delivered — before we write a single line of code.
Payment only at the end. External costs, like domains, are separate.
- 02Weeks 2–10
Build
Weekly deliveries on a live URL. Watch the project evolve, test each stage, and we adjust together — not after it's finished.
- 03Final week
Launch
We put the product live, hand over the code and all credentials, and stay with you for another thirty days of support — included, at no extra cost.
Every project is fixed-price. No hourly billing surprises.
§ Before you book
Questions we get a lot.
Most websites land between €300 and €1,000. Apps and internal tools usually sit between €600 and €2,000. You get a fixed quote after the first call — no hourly surprises.
§ Book a meeting
Pick a time. We'll talk for thirty minutes.
Have an idea? We'll talk it through and figure out what makes sense to build. Pick a time below — any day of the week.
Choose a day
Available times
—
Times shown in your local timezone.
Your details
§ Or just write to us
Not ready to book? Send a note.
Tell us what you're thinking about. We read every message and reply within a day.