Custom Web App Development
SaaS products, customer portals, dashboards and internal tools built with React, Next.js and Node.js.
- TypeScript
- React
- Next.js
- Node.js
Software development studio
We build web apps, mobile apps and AI features that ship
Hades Studio is a small engineering team for startups and growing companies. We take your product from idea to production in weekly increments, and you own the code from day one.
What we build
One team covering the full product, from the interface to the infrastructure.
Mobile App Development
Cross-platform and native apps for iOS and Android, including the backend and the store submission.
- React Native
- Expo
- Flutter
- Kotlin
AI and LLM App Development
RAG systems, AI agents and LLM-powered features integrated into the product you already have.
- Claude API
- OpenAI API
- Python
- TypeScript
How we work
Step 1
Project brief
You send us a description of the problem, the users and the constraints. We reply in writing with questions within one working day.
Step 2
Written estimate
Within a few working days you receive a scope, a timeline and a price broken down by feature.
Step 3
Weekly increments
We build in one-week cycles. Each ends with a recorded demo and a version you can open and test yourself.
Step 4
Launch and handover
We deploy to your accounts, document the system and either stay on for maintenance or hand over to your team.
What to expect from us
You work with the engineers
You communicate directly with the people writing your code. Questions get answered by someone who knows the system.
Working software every week
Each week ends with a recorded demo and a build you can open yourself, so progress is something you can check.
You own everything
Code, repositories, cloud accounts and documentation are yours from the first commit.
Estimates in writing
Scope and price are broken down by feature before work starts, and changes are agreed before they are built.
Selected work
All case studies →Our own website
This website: a fast, search-ready studio site on Cloudflare Workers
How we built hadesstudio.dev with Next.js on Cloudflare Workers: prerendered pages, structured data on every page and a contact form with no third-party email service.
- Next.js
- Cloudflare Workers
- SEO
Concept prototype
MatchCV: an interactive prototype for an AI resume tailoring tool
A concept prototype built in React and TypeScript to test a complete product flow, from upload to export, before any backend or AI integration was written.
- React
- TypeScript
- Prototype
In-house product, in development
TransSub: a cross-platform media player with AI subtitles
An in-house product in development: a Flutter media player for six platforms that generates subtitles with AI and keeps long-running jobs alive across screens and restarts.
- Flutter
- Node.js
- AI subtitles
From the blog
All articles →September 29, 2026
How Much Does It Cost to Build a Custom Web App?
A practical way to estimate the cost of a custom web app: what drives the price, how to read a quote, and how to cut scope without hurting the product.
- Web development
- Pricing
September 29, 2026
Fixed Price vs Hourly: How to Pay for Software Development
Fixed price and hourly contracts move risk in different directions. Here is how each one works, where each fits, and a middle option that suits most projects.
- Pricing
- Working with developers
September 29, 2026
How Much Does It Cost to Build a Mobile App?
What drives the cost of a mobile app, how platform choice changes the budget, the costs people forget, and how to lower the price without hurting the product.
- Mobile development
- Pricing
Have a project in mind?
Tell us what you are building. We reply within one working day with next steps.