Available for one new project

App developer from Germany. I build apps for enterprises.

Contact hallo@kiliankellermann.de

Portrait of Kilian Kellermann
Role
App developer
Based in
Germany
Languages
German · English
Focus
iOS · Flutter · Backend

What I do.

Short and honestly rated.
01
iOS · Swift, SwiftUI Native apps through App Store release.
daily since 2021
02
Architecture & quality Clean code that survives version 2.
tests · ADRs · docs
03
AI-assisted development Faster — responsibility stays with me.
review stays with me
04
Flutter · iOS & Android One codebase, two platforms.
own app in progress
05
Backend · Node.js, PostgreSQL Login, data, payments, push.
GDPR-compliant

References.

JUNG HOME app: home screen with scenes, areas and devices next to the slogan “Jung Home. Just smart.”
iOS app · employedsince 2020

JUNG HOME app

Since 2020 I have owned the architecture and evolution of the SwiftUI-based iOS app for JUNG HOME — a smart-home system that connects switches, buttons and sockets locally via Bluetooth Mesh. Alongside: CI/CD with Fastlane for several apps, migrating the existing iOS apps and establishing AI-assisted development in the team.

SwiftUI · Bluetooth Mesh · Fastlane · IoT ecosystem of apps, gateway and embedded— Albrecht JUNG GmbH & Co. KG, Schalksmühle, Germany

In progress · own project

Project name

An app I'm building myself — idea to store. Watch how I work, live.

W38Onboarding done, TestFlight live
W36Sync backend up
W33Architecture & first screens
W30Idea, sketches, scope
Progress to v1.060%

How I work.

  1. Listen

    One conversation, in German or English. I want to understand your goal.

  2. Plan

    Scope, stages, price — in writing, clearly.

  3. Build

    A new version on your device every week. Questions answered the same day.

  4. Hand over

    Release, docs, source code. All yours.

What you can expect

Onepointofcontact.GermanorEnglish.Yourtimezone.ContractandprivacyunderGermanlaw.Oneprojectatatime.Plainwords,notjargon.Andcodethatbelongstoyou.

Companies
Pilot app, feature or second opinion. Contract-ready and documented.
Startups
From prototype to a first version that holds.
Individuals
An idea but no tech team? I explain, plan and build.

Say
hello.

hallo@kiliankellermann.de
I am

  • Reply within 24 h
  • German · English
  • Remote or on-site