VASTOR HOLDING UG (haftungsbeschränkt) // APP DEVELOPMENT & AI ENGINEERING HAMBURG, DE · HRB 20355B171109
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FIG. 1: BUILD PIPELINE — SCOPE → PROTOTYPE → RELEASE MOTIF: RIPPLE ·

WE BUILD AND SHIP THE APP YOUR ROADMAP PROMISED.

Thorgas is the AI-first software studio of VASTOR HOLDING UG in Hamburg. We design, build, and release cross-platform products, the Google Cloud infrastructure behind them, and the AI code systems teams use to move faster — from first spec to production release and the maintenance after it. We also run AI workshops for engineering teams that want to work this way themselves.

BASED: HAMBURG, DE WE SPEAK: ENGLISH AND GERMAN CONTRACTS: WERKVERTRAG / DIENSTVERTRAG DELIVERY: AI-FIRST, HUMAN-REVIEWED CLIENT INFRA: EU REGIONS AVAILABLE

01  SERVICES

FOUR WAYS WE ENGAGE
S.01

Cross-platform products

One product, every surface. Mobile plus web from a shared codebase, built for release and maintained after it.

  • React Native / React / TypeScript
  • Offline-first data and sync
  • API and backend design
S.02

Cloud & infrastructure

Google Cloud environments that stay predictable: provisioned as code, observable, and hosted in EU regions where the data protection story has to hold up.

  • Firebase, Google Cloud Run, BigQuery
  • Infrastructure as code, CI/CD
  • Monitoring, backups, cost control
S.03

AI code systems

LLM features that survive production: measured, bounded, and cheap enough to run. We build the harness, not just the prompt.

  • Agent and tool-calling workflows
  • Retrieval and evaluation harnesses
  • Latency and token cost tuning
S.04

Consulting & audits

A second pair of hands on an existing codebase: architecture review, delivery unblocking, and a plan your team can execute.

  • Codebase and architecture review
  • CI/CD and release automation
  • AI adoption for engineering teams

02  AI-FIRST DELIVERY

HOW THE WORK GETS DONE

We build AI-first. Coding agents, model-assisted review, and generated test coverage are part of the daily workflow here — not an experiment running beside the real work. It is a large part of why a studio this size can take on the scope it does, and why the first running build tends to arrive weeks earlier than it used to.

We keep the toolchain current on purpose. In this field a two-year-old default is already the slow option, so we re-evaluate what we build with every six weeks and carry the good parts into the next project.

What does not change: a human reviews and owns every line that reaches your repository. Models draft, refactor, and catch things people miss — they do not decide what correct means, and nothing merges on a model's say-so.

We are also happy to work the other way. If your compliance position rules out AI tooling on your codebase, say so at the first call and we will scope it without.

EARLIER PROTOTYPES

Agent-assisted scaffolding puts a running build in your hands early, while changing your mind is still cheap.

REVIEW ON EVERY CHANGE

Automated review runs on each pull request alongside the human one, so coverage does not depend on who was paying attention that day.

NO LOCK-IN

You get a normal codebase in your own repository, readable and maintainable by any team — with or without the tools we used to write it.

ALSO AVAILABLE

AI workshops for engineering teams

Half-day and full-day sessions, remote or on site in Hamburg, in English or German. We work in your repository rather than on slides, so the team leaves having actually shipped something with the tools.

The written output is a set of conventions your team agreed to: where these tools are used, where they are not, and how the review process changes.

TYPICAL TOPICS
  • Coding agents in a real, existing codebase
  • Context and prompt engineering for code
  • Review, testing, and safety guardrails
  • Choosing models for cost, latency, and privacy
  • What to keep in-house and what not to automate

03  PROCESS

HOW A PROJECT ACTUALLY RUNS
01

FIRST CALL

A free intro call. You describe the idea and where it stands; we say what we would need to look at, and whether we are the right studio for it at all.

02

CONCEPT PHASE

A short, separately contracted phase: requirements, user flows, technical architecture, and an effort estimate with its assumptions written down. The result is yours to keep.

03

DESIGN & PROTOTYPE

Interface design and a clickable prototype, so the important decisions get made before they are expensive to change.

04

DEVELOPMENT

Two-week cycles with a running build at the end of each. You see progress as something you can install, and priorities can move between cycles.

05

RELEASE

Store submission and review handling, or production rollout for web. Monitoring, error reporting, and the handover documentation your team needs.

06

OPERATION

What happens after launch: OS and dependency updates, bug fixes, and further development under an agreed support arrangement.

04  ENGAGEMENTS

HOW WE CONTRACT

CONCEPT PHASE

SEPARATELY CONTRACTED · FIRST STEP

Most projects start here. A bounded piece of work that turns an idea into specified requirements and a grounded estimate. You own the output and are free to build it with anyone — including someone else.

WERKVERTRAG

DEFINED SCOPE · AFTER THE CONCEPT PHASE

Once requirements are actually specified, we can commit to a scope and a price for it. We do not quote a fixed price off a first conversation: at that stage it is a guess, and the risk buffer ends up on your invoice.

DIENSTVERTRAG

BY EFFORT · MONTHLY

Reserved capacity billed against tracked effort, at an agreed rate with a monthly ceiling. Suited to products whose scope keeps moving, and to maintenance once you are live.

05  STACK

TOOLS WE USE IN PRODUCTION
TypeScript React Native React Node.js Python PostgreSQL Supabase Firebase Google Cloud BigQuery Cloudflare Docker Terraform GitHub Actions
AI TOOLING WE BUILD WITH AND ON
ChatGPT OpenAI API Claude Code Claude API Cerebras Model Context Protocol Cursor GitHub Copilot Vector search / RAG Evaluation harnesses

06  COMPANY

Thorgas is operated by VASTOR HOLDING UG (haftungsbeschränkt), a company registered in Hamburg, Germany. Work is led by founder and managing director Tim Horgas, who handles architecture and delivery directly on every engagement, with a small network of specialists for design, QA, and infrastructure.

We work with founders and product teams in the EU and US who need software actually released — signed, submitted, reviewed, and maintained.

Start with a conversation.

Send a short description of what you want to build and where it currently stands — an idea, a spec, or an existing codebase. We will arrange a call to work out whether the project is a fit and what a sensible first step looks like. No pitch deck, no obligation.

Bernstorffstr. 104, 22767 Hamburg, Germany Mon–Fri, 09:00–18:00 CET