KASTRICK / SOFTWARE SYSTEMS
Kastrick
Websites, web applications and backend systems built to keep moving after launch. This site runs on Nextjs Engine, the frontend tool we create and use ourselves.
DESIGN · FRONTEND · BACKEND · API · INFRASTRUCTURE · LONG-TERM UPDATES
SYSTEM / KASTRICK
BUILT WITH NE
01 INTERFACE
Website / product UI / frontend runtime
↓
02 APPLICATION
API / auth / data / integrations
↓
03 RUNTIME
Backend / service / deployment / recovery
NEXT.JS ENGINE
RBE
WHAT WE BUILD
One project can cross more than one layer.
Instead of treating the frontend, backend and long-term maintenance as unrelated jobs, Kastrick can design the boundaries together and keep the source understandable after launch.
01 / WEB
Websites + web apps
Public sites, product interfaces and application UIs built for real content and real maintenance.
02 / BACKEND
APIs + backend systems
Authentication, data flows, integrations and service logic behind the interface.
03 / INFRA
Infrastructure + delivery
Deployment structure, managed email, service boundaries and the systems needed to keep software reachable.
04 / CONTINUE
Long-term updates
Keep improving one codebase instead of rebuilding from scratch every time the requirements change.
SELECTED WORK / 01
Roavio
Independent showcase build

A clearer way to find your next city.
A city-discovery web application that brings destination search, comparisons and local guides into one experience, with English and Spanish interfaces.
Built with Nextjs Engine, the same Kastrick tool behind this website.
01
Explore
Browse destinations and narrow the search around what matters to you.
02
Compare
Bring up to three cities together to weigh the differences.
03
Read in context
Explore city guides and switch between English and Spanish.
DEVELOPER TOOLS / KASTRICK PROJECTS
We build with the tools we create.
Nextjs Engine powers this website and Roavio. Building with our own frontend tool gives us real interfaces to improve it against. RBE is our separate backend engine project; both tools have their own developer pages and documentation.
01 / FRONTEND TOOL
Nextjs Engine
The frontend tool behind Kastrick and Roavio. It brings page structure, navigation and interactive experiences together on Next.js.
USED HERE · USED IN ROAVIO
02 / BACKEND TOOL
RBE
Our Rust backend engine project for application logic, managed services and infrastructure. Explore the project on its developer pages.
RUST BACKEND ENGINE · ACTIVE DEVELOPMENT
HOW WE WORK
Build it so the next change is not a disaster.
01
Understand the actual system before picking the stack or drawing the interface.
02
Build clear boundaries between the UI, backend, data, integrations and deployment responsibilities.
03
Ship source that can still be understood and changed after the first release.
HAVE SOMETHING WORTH BUILDING?