App Developer (C#, Flutter) – Remote (Germany) (m/f/d)

Synaptikon GmbH

Source: PersonioLocation: GermanyPublished: Feb 03, 2026Confirmed active: Oct 24, 2026
Full-timeFreelance / ContractTechnology

Key points from the posting

Tech stack
FlutterC#Xamarin.AndroidXamarin.iOSUnityISO 13485MDR
Seniority:
Mid-level
Benefits
  • Flexible working hours (core hours: 9:30–16:30 CET)
  • BVG ticket
  • Urban Sports Club membership

Automatically extracted

Our assessment

  • Our reading of the full posting text confirms it: fully remote.
  • 6 more open roles from this employer in our index. 1 of them fully remote.

Automated assessment by nomado24, not an employer statement.

Job description

Your mission

As an App Developer (Flutter & C#) at NeuroNation, you will play a central role in our mobile technology transition. You’ll help shape the future of our platform by building new features with Flutter, maintaining existing systems in C#, and contributing to an engaging, smooth user experience for millions of users worldwide. This is a chance to combine technical expertise with purpose-driven work that improves lives.

Key Responsibilities

  • Build and maintain mobile app features using Flutter and C#
  • Drive our mobile technology transition with your Flutter expertise
  • Collaborate with product, design, and engineering teams to deliver seamless solutions
  • Monitor app health and performance to ensure reliability and user satisfaction
  • Contribute ideas and improvements that reach millions of users

Your profile

Must-have Skills

  • Proven experience in Flutter mobile development
  • Strong knowledge of C# and object-oriented programming
  • Experience developing games with complex logic (e.g., state machines, deep rule sets, dynamic gameplay mechanics)
  • 3+ years of professional experience in software development
  • Degree in Computer Science or related field
  • Located in Germany (remote within Germany or hybrid in Berlin)

Nice-to-Have Skills

  • Familiarity with Xamarin.Android or Xamarin.iOS
  • Background in Unity or game development
  • Experience with quality management systems (e.g., ISO 13485, MDR)

Why us?

  • Work on something that truly creates value for people
  • Make a significant impact on a platform used by millions worldwide
  • Take on meaningful, exciting projects instead of routine corporate or agency work
  • Help revolutionize health and education systems through technology and innovation
  • Enjoy flexible working hours (core hours: 9:30–16:30 CET)
  • Receive a BVG ticket to support sustainable and convenient commuting
  • Access an Urban Sports Club membership for your well-being and work-life balance
  • Be part of an open, supportive culture that values learning, growth, and collaboration
Product DevelopmentFixed term contract (with challenge)fixed term

This role is provided by an external source. Applications are handled on the source website.

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