We do not sell one stack for every job
Full cycle: from a landing page to a product with a server, payments and mobile apps. We choose the technology by deadline, by load, by what your team can maintain and by what support will cost a year from now. If you already have a codebase, we continue it rather than quoting you a rewrite.
- Web interfaces
From a landing page to a working product
A page that has to open fast and an interface that has to hold complex state are different jobs. We choose for each separately.
- TypeScript
- React
- Next.js
- Vue
- Svelte
- Astro
- Tailwind
- Vite
- Servers and APIs
So it does not fall over at three in the morning
Validation, authorisation, rate limits and real logs go in at the start, not after the first incident.
- Node.js
- TypeScript
- Python
- FastAPI
- Go
- PostgreSQL
- Redis
- Queues
- Automation and integrations
Everything wired into one working loop
The CRM, the spreadsheets, the messengers, the payments and the internal services, with no copying by hand and no glue. The thing that usually takes months of improvising.
- n8n
- Temporal
- Webhooks
- CRM API
- Telegram
- Make
- Custom workers
- Native mobile
When native is genuinely the answer
Camera, background work, offline, health, in-app purchases. Those are the reasons to go native, and they are the only reasons we do.
- Swift
- SwiftUI
- Kotlin
- Jetpack Compose
- StoreKit
- HealthKit
- CameraX
- One codebase, two stores
When two native teams do not pay for themselves
Most products do not need two codebases. We say so plainly, and we say just as plainly when native is the right call after all.
- Flutter
- React Native
- Expo
- Kotlin Multiplatform
- Capacitor
- Data and storage
Chosen for the job, not out of habit
Transactions, analytics, search, cache and vectors are different jobs. Solving all of them with one database is the fastest route to something slow.
- PostgreSQL
- Redis
- ClickHouse
- Elasticsearch
- pgvector
- S3
- Prisma
- AI inside the product
Models doing work, not models in a demo
In production what matters is token accounting, retries, fallback routes and a predictable bill at the end of the month. That is the actual work.
- OpenAI
- Anthropic
- RAG
- Embeddings
- Tool calling
- Streaming
- Ollama
- Payments and billing
Cards and crypto, both in production
Subscriptions, plan changes with proration, and webhooks that do not charge twice when they arrive twice.
- Stripe
- Paddle
- NOWPayments
- Subscriptions
- Idempotent webhooks
- Invoices
- Browser extensions
The part most studios turn down
A published extension on the current manifest, in two stores, with a permissions model that makes sense. Not many do this.
- Chrome
- Manifest V3
- WebExtensions
- Firefox Add-ons
- Service worker
- Chrome Web Store
- Infrastructure and quality
Deployed, watched, and yours
Automated builds, monitoring that reaches a phone, tests before the deploy and security before it is too late. All of it in your accounts.
- Docker
- CI/CD
- Cloudflare
- Yandex Cloud
- Selectel
- Timeweb
- VK Cloud
- Sentry
- Playwright
- OWASP
- Rate limiting
- 2FA
And where each of these has actually run
A list of tools anybody can write. This is the same list with the project each one shipped on beside it, which is the version that can be checked.
- TypeScriptSwiftin, this site
- ReactSwiftin, this site
- Next.jsSwiftin, this site
- Node.jsSwiftin backend
- PythonCowee
- PostgreSQLSwiftin, Cowee
- SupabaseSwiftin auth and data
- DockerCowee deploy
- VercelSwiftin web
- RailwaySwiftin backend
- TelegramCowee, our inbox
- PlaywrightOur own testing
Not by fashion. By what the product cannot do without.
How soon it has to be in front of users
One codebase reaches two stores sooner than two do. Where the deadline is the binding constraint, that is the argument, and where it is not, it is a bad reason to give up native depth.
What it has to be able to do
A camera, background work, real time, offline, heavy data or a system integration decide the stack on their own, and they decide it before anybody has an opinion about frameworks.
What already exists on your side
A working codebase gets continued, not quoted for a rewrite. If your own people maintain it afterwards, what they know is a constraint on the choice rather than a detail of it.
What it costs to keep alive in a year
The first release is the cheap part. Servers, updates, the security patches nobody plans and the hiring market for the thing you chose all outlive it, and they are counted before the choice rather than after.
Price it yourself, right here
Five steps, and you can see the number without leaving a contact. The estimate accounts for the kind of work, what you already have and what it will need inside.