Preslav Rachev

Bis 2022, Golang Instructor, ScaleFocus

Munich, Germany


Spring Framework
Play Framework
Apache Solr
Apache Maven
Apache Flex
Software Development
Elixir (programming language)


Professional experience for Preslav Rachev

  • Current 10 months, since Jul 2023

    Senior Software Engineer

    Comsysto Reply GmbH
  • Current 3 years and 1 month, since Apr 2021

    Founder. Independent Software Engineer and Consultant

    Freelance, self-employed

  • Current

    Independent Software Developer

    Exploring challenging opportunities

    Brainstorming ideas, researching, and developing software solutions for challenging problems. Assessing the potential of particular technologies. Assessing the business potential of particular ideas. Collaborating with potential clients and co-workers.

  • 4 months, Feb 2022 - May 2022

    Golang Instructor


    Prepared and delivered a comprehensive 3-month Go training program to a group of ambitious future programmers. The 3-month training touched on a variety of subjects, starting from the fundamentals of the language, its core advantages in today's cloud world, and many advanced practical topics, such as data persistence, building web apps and microservices with Go, testing, network protocols and inter-process-communication, etc.

  • 2 years and 5 months, Nov 2018 - Mar 2021

    Senior Software Engineer

    KI labs GmbH

    Building reliable, scalable, and maintainable data-intensive systems.

  • 3 years and 3 months, Sep 2015 - Nov 2018

    Full Stack Java Developer

    CHECK24 Vergleichsportal
  • 4 years and 6 months, Mar 2011 - Aug 2015

    Software Developer

    IN2 Search Interfaces Development Ltd

    My job at IN2 involves architecting and developing solutions for our portfolio of online services. This includes overseeing a project during all phases of its lifetime - from the original idea through development, to maintenance and scaling. At IN2, we strive for picking the right tools for the right problem. Over the last few years, we have developed expertise in working with technologies like: Play Framework, Hibernate, Google Guice, PostgreSQL/PostGIS, Redis, Apache Solr/Lucene etc.

  • 4 months, Jun 2010 - Sep 2010

    Apache (formerly Adobe) Flex/Flash Developer

    Obecto Ltd.

    Developing immersible socially-focused 3D games and environments for the Web. Particularly, participating in the development of reusable Flex components, and integrating them into the overall architecture of the entire application. Emphasizing on keeping the principles of good design by creating scalable and maintainable architectures.

  • 4 months, Jun 2009 - Sep 2009


    Gugga Ltd

    Took part in the development of the server-side layer of a multi-tier CMS, based on .NET and Adobe Flex

  • 8 months, May 2008 - Dec 2008

    Market Research Analyst

    Balkans Investment Consulting Agency (BICA)

    The position involves gathering large amounts of qualitative and quantitative data, their analysis, and the preparation of a report addressing a particular marketing case.

  • 3 months, Jul 2007 - Sep 2007

    PHP Developer

    Ideal Standard Bulgaria

    Building an internal company product to automate the approval and registration of new products. Extensive use of PHP and SQL. The product is tested and used on a worldwide corporate level.

Educational background for Preslav Rachev

  • 1 year and 10 months, Oct 2010 - Jul 2012

    Digital Media

    Bremen University

    Game-based learning, Web Interaction with Embodiment, Game Design, Interface Design

  • 6 months, Mar 2009 - Aug 2009

    Computer Science

    Otto von Guericke University

    User Interface Engineering, Advanced Database Modeling, Intelligent Data Analysis, Multimedia and Security, Rapid Prototyping in Game Development

  • 3 years and 9 months, Sep 2006 - May 2010

    Computer Science / Business Administration

    American University in Bulgaria

    Data Mining, Data Structures, Database Design and Architecture, Software Engineering, Corporate Finance, Accounting, Marketing, Marketing Research


  • English


  • German


  • Bulgarian Native



social networking
data vizualization
data analysis
ui architecture
Entity Framework
Game Design
web development
idea engineering
graphic design
Network Programming
Network Security
functional programming

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