• leading IT development, product strategy and business intelligence for a travel startup from incarnation to 120 employees and ?70m yearly revenue
• building a team of 20 international on-site and remote engineers, product managers and designers
• building, maintaining and extending the in-house platform, connecting external bed banks, channel managers and integrating with international partners such as Live Nation / Ticketmaster, Stage Entertainment and Mehr BB Entertainment (Harry Potter)
• defining and executing the product strategy, monitoring competitors and market developments
• establishing an a/b test driven product development culture

• building up and leading an international team of 10 developers
• maintenance, stabilisation and performance optimization of the mobile apps, the backend as well as the web frontend
• plan and establish development processes, code reviews, branching- and deployment strategies
• strategic and technical planning of a new product platform
• supervision of the requirement gathering process for new product features
• implementation of RESTful (RMM level 3) web services with the focus on usability for several clients and partners
• evaluation of payment and location service providers as well as accounting systems
• development of a B2B portal for the implementation of business customers like KPMG, BMW and Volkswagen

• evaluation, strategic planning and development of a business case for a BigData infrastructure
• prototyping a Hadoop cluster including Hive, HBase and other tools for archiving and processing of 1.5 TB daily product specific data
• creating data pipelines, definition of event formats for generic transport and storage of data

• building up and leading a team of 14 people - including developers, quality and project managers in an agile development environment using scrum and kanban
• independently setting goals, development of roadmaps and reports for the CEO, CTO and the board
• managing a 7-figure budget, staff and cost planning for projects, software, hardware and infrastructure
• technical strategy and negotiations with international B2B partners for implementations of white label solutions and platform integrations
• responsible for the central user account system, shared libraries and tools used throughout the company
• scaling the user account system from 60 million to over 300 million users. optimization of registration and authentication processes for all products by a factor of 10 as well as SSL security
• planning and implementation of automatic mechanisms for blocking and monitoring several attack methods (including brute force) as well as handling peak loads
• responsible for company wide web developer recruiting
• planning and implementation of release planning, change management and deployment processes, staging environments and test driven development
• integration of partners, development and extension of a single sign-on solution
• consulting and technical support for in-house product-, marketing- and business development teams. evaluation of new products, features and ideas
• essential contributions to a successful restructuring for the whole IT development division (workflow and process definition, assigning areas of responsibility, documentation and presentation as well as coaching)

• technical responsibility for all web developers
• screening of applications, interviewing the candidates and hiring them
• consulting for assigning new hires to project teams, during the timeframe 60 web developers were hired
• development of company wide standards, TDD, versioning, peer programming
• implementation of technical meetings workshops and trainings

• development of the web-based browser game Deepolis
• technical responsibility for frontend as well as backend development

Development of online guides for ViperMedia GbR

• conception, development/planning and maintenance of several online guides and websites (e.g. FödermittelCheck -known from TV commercials from RWE).
  
• Administration of customers? web servers as well as further development of the guide frameworks.

Development of online guides for SEnerCon GmbH (Sigma Energy Consult GmbH)

• conception and development of the online guide Energiesparkonto.
• Server administration (Linux, Apache, mySQL) and consulting for software development, conception and server hardware.

• Several smaller projects for Flaskamp AG.
• Development of animations with Actionscript 3.

• During Semester breaks, working for the German Aerospace Center (DLR) for the BEST project.
• Conception and development of a software for remote controlling a telescope and other components stationed in France over the internet.
• Encrypted transfer of observation data and automation of the observation process.

• Maintenance of the homepage of ,,vision. Medienagentur.
• Development of customer websites.
• Areas of responsibility: Design and development of several web pages, customer acquisition.