8 OCT 2015
brainbot technologies Mainz, Germany

Blockchain and Ethereum Developer

brainbot technologies is working on cutting edge blockchain development.

We are a major contributor to Ethereum, a Blockchain 2.0 system which supports turing complete smart contracts and is a platform for rapid development of decentralized applications (DApps). The platform also comes with a secure messaging infrastructure (Whisper) and a DHT based storage (ipfs).

Our core product is HydraChain which is an extension to Ethereum for enterprises.

You’ll work on the client core and/or build applications based on the Ethereum and HydraChain platforms. Most of the work will be on open source software.

To get an idea about the tools we are using, please take a look at the code:

As we are relying on PyPy and gevent, we are currently using Python 2.7 but plan to move to Python 3 once PyPy is compatible with Python 3.3.

Note: We do not use Django. The architecture of decentralized applications which are build on top of Ethereum is: local ethereum-node <- jsonrpc -> HTML/JS
While building distributed applications on top of the Ethereum stack might be one of your tasks, the focus will be on core development.

Essential Skills & Experience

  • Strong Python skills
  • Experience in an open source community
  • Experience building and maintaining products with real-world usage
  • Experience in testing and continuous integration
  • Attention to detail – awareness that the applications here are mission critical  
  • Ability to own what you are building and see it through from end to end
  • Knowledge of git and git workflows
  • Fluent in English (oral and written).


  • Good C++ skills
  • Experience in profiling code
  • Experience with blockchain technology
  • Experience with cryptography
  • Experience with p2p and networking

How to apply

Send your updated CV to

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18 SEP 2014
m.i.r. media, Digital Agency Cologne, Germany

Python-Django Webdeveloper

Short description of job and company
m.i.r. media, Germany (Digital Agency) is searching for a Django-Developer to support our team of developers. The agency in total has 20 employees. You will be realizing web-applications and products for our national and international clients. m.i.r. media is specialised in Design, UX and programming of CMS based websites, mobile applications and community management of brands. Among our clients are Baileys, Guinness, Rimowa, Nikon, Kölner Philharmonie, Konzerthaus Berlin and many more. We love Django. Our clients love it too.

We build most application in Python and use Django as main web framework. Furthermore the job requires good skills and experience in Javascript and SQL. The applicant should speak and understand English (good) and German (basic) and he should have experiences in agile software development (SCRUM) and be familiar with GitLab and a team player.

What makes us special
We offer a pleasant working atmosphere with an international developer team. Low hierarchy and fast turnarounds help you to develop your projects. We offer free food by our agency cook, fruits and of course unlimited coffee and tea.

You can use our guest apartment for the first months for free. We support you with all required initial paperwork.

 Job requirements
- Skills and experience in Python/Django (required)
- Skills and experience in jQuery (required)
- Linux/webserver configuration an SQL proficiency to set up Django project (required)
- HTML5/CSS proficiency (nice to have)
- Familiar with agile software development (scrum) (nice to have)
- Git lover
- English language (Good), German language (basic)
- EU citicenship only

URL for more information (German version)

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