Michal Příhoda, Developer in Prague, Czech Republic
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Michal Příhoda

Verified Expert  in Engineering

Software Developer

Prague, Czech Republic
Toptal Member Since
March 10, 2016

Michal is a programmer with more than a decade and a half of experience. Currently, his languages of choice are Scala and JavaScript. As a developer, he's worked on back-end services as well as the front-end, UI, and mobile projects. Michal also has many years of experience as a Unix/Linux administrator.


eIdentity a.s.
MySQL, Jakarta EE, JBoss, Java, Lift, Play Framework, Akka, Scala
e-Business Services a.s.
PL/SQL, MySQL, Oracle, Python, Java, PHP, Lift, Akka, Scala
React, JavaScript, Java




Preferred Environment

Git, IntelliJ IDEA, Unix

The most amazing...

...thing I've built has been a certificate authority for the Czech government issuing certificates to every small business in the country.

Work Experience

Lead Developer

2005 - PRESENT
eIdentity a.s.
  • Developed the core software for certificate which is the authorization, accredited in the Czech Republic.
  • Developed a high-performance time-stamping service, accredited in Czech Republic.
  • Created a web application covering the certificate issuing process.
  • Created a validation service for long-term signature validation.
  • Prepared the deployment and high-availability infrastructure for the services.
Technologies: MySQL, Jakarta EE, JBoss, Java, Lift, Play Framework, Akka, Scala

Lead Developer

2001 - PRESENT
e-Business Services a.s.
  • Developed an e-shop supporting the whole distribution chain, from the vendor through distributors, dealers to customers.
  • Developed an electronic auction system.
  • Developed a Telematic application to analyze traffic on Czech highways.
  • Created a service asynchronously integrating multiple systems for Czech Metrology Institute.
  • Created a continuous integration infrastructure for application development.
Technologies: PL/SQL, MySQL, Oracle, Python, Java, PHP, Lift, Akka, Scala


2012 - 2016
  • Implemented a single sign-on solution for a Java web application including the user interface.
  • Developed a rich configuration UI for a Java server application.
  • Implemented a permission system for user authorization in a modular Java server app.
  • Developed a custom web framework for a modularJjava server app.
  • Created a migration tool to migrate user data from OpenSSO to custom implementation.
Technologies: React, JavaScript, Java

Lead Developer

1999 - 2001
Globopolis s.r.o.
  • Led a small team of developers.
  • Ported a web portal from MySQL to Oracle.
  • Created a servlet for map image generation.
  • Integrated multiple input sources via XML.
  • Started rewriting the portal into Java.
Technologies: Oracle, MySQL, Apache, PHP, Apache Tomcat, Java

Unix Administrator

1996 - 1998
Spinet a.s.
  • Created an internet provider from scratch.
  • Administered email servers, web servers, and DNS servers.
  • Supported dial-up users.
Technologies: Python, Shell, Perl, Linux


Created the certificate authority for the Czech government, issuing certificates to small businesses; written in React (front-end) and Scala (back-end).

ACA EIdentity

A certificate authority accredited by the government in the Czech Republic.

Czech Metrology Institute

A public-facing portal of the Czech Metrology Institute, including the relevant back-end services. I also created the back-end services.


A Health Information Exchange service used internationally.

TSA EIdentity

A time-stamping authority accredited in the Czech Republic.

Aegon Modelace

An implementation of a mobile insurance calculator for Aegon specialists.


A web app to serve as an archive for digitally signed PDF documents, including the long-term digital signature.


Java, JavaScript, Scala, SQL, HTML, XML, Objective-C, HTML5, Perl, Markdown, Python, UML, R, Less, PHP, Bash, CSS, Domain-specific Languages (DSLs), Jython, Groovy, XSLT


Mustache, Immutable.js, React, jQuery, Underscore.js, RefluxJS, BouncyCastle, JAXB, Commons HttpClient, Guava, RequireJS, OpenCV, Node.js, Moment.js, OpenLDAP, iText, spray, JAX-RS, JAX-WS, Backbone.js, CocoaPods, Akka Streams


IntelliJ IDEA, Apache, OpenVPN, Shell, Git, Apache Maven, SBT, Vim Text Editor, NPM, Cucumber, Tmux, Sketch 3, Jira, ITerm, Terminal, IPython Notebook, Chrome Developer Tools, ScalaTest, Zsh, Ansible, VMware, SoapUI, NGINX, Babel, Apache Tomcat, FreeMarker, Mocha, Webpack, Vagrant, Subversion (SVN)


Unit Testing, Functional Programming, Agile Software Development, CQRS, Behavior-driven Development (BDD), Test-driven Development (TDD), Domain-driven Development, REST, Functional Reactive Programming, Reactive Programming


iOS, MacOS, Linux, Docker, Unix, Oracle, Jakarta EE, Xen, CoreOS, Debian Linux, Java EE, JBoss


Play, JUnit, Lift, Play Framework, Jakarta Server Pages (JSP), AFNetworking, Flux, Google Guava, Guice, Google Guice, Jasmine, Bootstrap 3, Akka, Akka 2, Tapestry, Rx, Spring, Hibernate, TestNG, Redux, Apache Velocity, ReactiveCocoa, OAuth 2


PL/SQL, CouchDB, MongoDB, MySQL


Data Structures, Algorithms, Domain-driven Design (DDD), GitFlow, Apache Commons, OAuth, POP3, IMAP, SMTP, HTTP, Gitolite, Specs, Semantic UI, LDAP, Gentoo, GNU, EJB 3, SOAP, Reactive Streams, FontAwesome, Enterprise Java Beans (EJB)