Independent software studio
Software with roots.
We design and ship products end to end — the backend, the web application, the mobile apps and the infrastructure they run on. Built carefully, tested, accessible, and maintained like something we plan to keep.
- Product engineering, not staffing
- Tested and accessible by default
- One team from design to production
The stack we actually ship
Modern, boring where it counts, proven in production.
Every tool below runs today in Fidily, the product we build and operate ourselves. Nothing on this list is aspirational.
Backend
C# / .NET 10 · EF Core · PostgreSQL
Web
React 19 · Next.js · TypeScript strict
Mobile
React Native · Expo — iOS and Android from one codebase
Delivery
Docker · GitHub Actions CI/CD · Linux · Traefik
What we do
Six services, one standard of care.
Product & SaaS engineering
An idea to a running product: domain design, architecture, the build, and the launch. We take end-to-end responsibility rather than delivering a repository and a goodbye.
.NET backends & APIs
C# on .NET 10, EF Core and PostgreSQL: clean domain models, typed error contracts, idempotent operations, audit trails — backends built for systems that handle real value.
Web applications
React 19 and Next.js in strict TypeScript: fast, accessible, statically rendered where it matters, tested end to end in real browsers in both colour schemes.
Mobile applications
React Native with Expo — one codebase shipping native apps to both the App Store and Google Play. This replaced Xamarin in our stack, and we can help you make the same move.
Cloud, containers & delivery
Docker images, reverse proxies with automatic TLS, GitHub Actions pipelines, Linux servers: the path from a merged pull request to production, made boring and repeatable.
Audits & technical consulting
A senior pair of eyes on an existing system: architecture, security posture, performance, accessibility, test coverage — findings ranked by risk, each with a concrete fix.
Our product
We run what we recommend.
Fidily is a universal loyalty platform for local merchants — one customer identity, merchant-owned rules, built and operated by Appcio on exactly the stack we sell. It is our proof of work: architecture, accessibility, tests and deployment, all inspectable in production.
How we work
The unglamorous habits that make software last.
Tested, not promised
Type-checked strict, unit-tested, end-to-end tested in real browsers, and wired into CI so a regression fails a build instead of reaching a user.
Accessible by default
WCAG AA contrast enforced by tests in both light and dark schemes, keyboard operability, reduced-motion support. Not a retrofit — a build gate.
Honest scope
We say what a system does not do before you sign, not after you find out. Limits written down are cheaper than limits discovered.
Tell us what you are building.
One email is enough to start the conversation — what you need, where it runs today, and when you want it live. We reply with questions, not a quote template.