I'm a software engineer, entrepreneur, technical advisor and open source evangelist. I'm passionate about product and team development, building scalable web infrastructures, development processes and all things tech. I have spoken on tech conferences about scaling web infrastructures, mobile applications architecture, iterative product development. I'm also co-organizing and frequently speak to the Amazon Web Services user group in Greece. Specialties: Amazon Web Services (EC2, S3, RDS, CloudFront, Route53, SES, SNS, SQS, CloudSearch, DynamoDB), Python, Redis, RabbitMQ, Django, Postgres, MySQL, Nginx, Varnish, Linux, UNIX, PHP, ASP.NET, Apache, systems architecture, database administration, object oriented programming, startups, content management systems.

Head of Engineering @ Building startups as a service. From September 2014 to Present (1 year 4 months) London, United KingdomCTO & co-founder @ Product development, strategy, growth and all things tech. From September 2010 to Present (5 years 4 months) Founder @ Software development and consulting From 2005 to Present (10 years) Director of mobile applications @ Mobile applications manager, team leader, software engineering. From July 2010 to January 2012 (1 year 7 months) Senior Software Engineer @ Web architect, software engineer. In-residence CTO of sport.gr From June 2006 to June 2010 (4 years 1 month) CTO @ Web development, project management, team leader From June 2006 to August 2007 (1 year 3 months) Web Designer/Developer @ Web design/development, project management, linux administrator From January 2001 to June 2006 (5 years 6 months)

Leonidas Tsementzis is skilled in: Amazon Web Services (AWS), MySQL, PostgreSQL, Git, Software Development, Django, Linux, Nginx, Python, Mobile Applications, JavaScript, CSS, Web Development, JSON, SQLite