octabits

Founder

Daniel Hartmann.

Daniel has worked as a software architect and developer for twenty-five years. He designs systems and writes the code to implement them.

Daniel Hartmann

Daniel began in 2001 with an ERP system, working on the database schema, device interfaces and reports. Since then he has worked with C#, Java, TypeScript, Kotlin, Go and Rust, and with frontend frameworks from jQuery and Ember to Angular, Vue and React. His focus is on how a system is structured and how its parts work together.

Over the past decade, Daniel has designed systems for client projects at n-fuse and built a SaaS platform as CTO of his own company, Hoovi. At LMZ Baden-Württemberg, he worked on MUSES, a DigitalPakt platform used by three German states to manage school IT.

Daniel founded the company in 2021 and is its managing director. He designed Reynt and built it largely with AI coding agents, taking it from an empty repository to production in eleven months. The booking platform has thirteen packages covering payments, tenant isolation and tax requirements. Its reusable libraries are now published by octabits. Approval, the company’s second product, uses the same process for reviewing AI proposals and recording human decisions.

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Experience

Experience

  1. since 12/2021

    Managing Director, Software Architect & Developer

    Octabits — DK2 Ventures UG

    Architecture and full-stack development of Reynt as sole developer, alongside customer projects in his own company. AI coding agents support architecture work, implementation and reviews.

  2. 07/2024 – 06/2026

    Software Architect & Team Coordinator

    LMZ Baden-Württemberg

    Architecture and development of MUSES, a cross-state DigitalPakt project for managing and configuring school IT infrastructure across three German states, with technical coordination of a development team of three to five.

  3. 05/2021 – 06/2024

    CTO, Lead Architect & Developer

    Hoovi GmbH — own company

    Technical responsibility for a SaaS platform in his own company, including architecture, technology selection and product development. Built and led a team of four developers.

  4. 07/2016 – 02/2021

    Lead Software Architect

    n-fuse GmbH

    Full-stack architecture and development for client projects, with responsibility for frontend tooling, component libraries and the technology stack.

  5. 05/2012 – 06/2016

    Senior Developer

    n-fuse GmbH

    Single-page applications, shared libraries and internal tools across a range of client projects.

  6. 09/2001 – 12/2012

    Developer

    CiS GmbH and others

    An ERP system including database architecture, device interfaces and report generation; business web applications; an RFID time-tracking system; and a web-based live customer support system on JavaEE and XMPP.

Daniel has run octabits since 2021 alongside his other roles. This accounts for the overlapping dates.

Skills

Skills

Languages

  • TypeScript
  • C#
  • Kotlin
  • JavaScript
  • Java
  • Python
  • Rust
  • Go
  • Dart
  • Solidity
  • PHP

AI / LLM

  • Claude Code
  • Claude API
  • Agent orchestration
  • Vercel AI SDK
  • MCP
  • RAG / embeddings

Frontend

  • Vue / Nuxt
  • React / Next.js
  • Astro
  • Angular
  • Svelte
  • rxjs
  • ngrx
  • Flutter
  • Tailwind CSS

Backend

  • Bun (Hono, Elysia)
  • Node.js (express, koa, nest)
  • Kotlin/Java (KTOR, Spring)
  • ASP.NET Core
  • GraphQL
  • REST

Testing

  • Vitest
  • Playwright
  • Cypress
  • JUnit
  • Testcontainers

Data

  • PostgreSQL
  • Redis
  • MongoDB
  • Elasticsearch
  • MySQL / MariaDB
  • MS SQL Server

Platform

  • Docker
  • Kubernetes
  • Terraform
  • FluxCD
  • Helm
  • GitHub Actions
  • Azure Pipelines

Languages

  • GermanNative
  • EnglishFluent (business)
  • SwedishBasic