David Kudera

HyperMedia is the first company where I worked on code which was not written by me or my team. Part of my job was to maintain as well as improve legacy applications. What I'm most proud of is starting the development of new systems (mainly microservices), tools, containerization of legacy applications and moving into Google Cloud.

One of my biggest tasks was, for example, to migrate user photos from HyperInzerce. All of them were stored on ordinary spinning hard drives, now all 7TB is in Google Cloud Storage.

I also created the base for all microservices, Docker containers, deployments into Kubernetes (in Google Cloud), Cloud Run, Cloud Functions, logging, internal tools, and a few other things.

In HyperMedia I learned:

• Maintaining legacy applications
• Containerization of legacy applications
• Electron
• Vue.js
• Google Cloud Run
• Google Cloud Functions (node.js + golang)
• Google Cloud Stackdriver (Debugger, Trace, Error Reporting, Monitoring, Logging)
• Moving 7TB of production data to Google Cloud Storage

and I used these languages/tools/...:

• GitLab with CI & CD
• Git
• PHP7 (main language)
• PHP RoadRunner (used in all microservices)
• PHP Slim (used in all microservices)
• Google Cloud Storage, Vision, Kubernetes, Stackdriver, Functions, Run, SQL, ...
• Golang for internal tools and in Google Cloud Functions
• Node.js for internal tools
• Electron for internal tools

This is the company where I fully embraced the cloud motion for the first time. To be more specific I switched from using VPS's to Google Cloud and Kubernetes.

In WebACAD we were building a new education portal and I worked here as a full stack developer.

I developed the frontend in Angular and backend in PHP Slim.

In WebACAD I learned:

• Migrating dockerized application into Kubernetes
• Migrating application from VPS into Google Cloud
• Better logging (a side effect of moving to cloud)
• Kubernetes
• Google Cloud (Functions, Logging, PubSub, Storage, ...)
• Microservices
• Golang (using in Google Cloud Functions)

and I used these languages/tools/...:

• Google Cloud
• Kubernetes
• Angular 7
• PHP 7.3
• Slim framework
• Doctrine with PostgreSQL
• Golang
• Git
• GitLab with CI & CD

I remember working for this company the most. This is because I made many friends here, learned a lot of new cool things, the environment was nice and, of course, because I spend almost 5 years here.

My main work consisted of developing a new job portal.

Main features were:

• Publishing vacancies
• Publishing resumes
• Creating a company presentation page
• Communication between companies and applicants
• Notifications

At the same time, I was the only backend developer here so my job was also to find some new colleagues. The situation in the Czech Republic was not ideal, so we looked into other countries and hired people from many different parts of the globe.

When we grew some more we needed for own servers. We decided to use this opportunity to "fix" our local network too. I build our rack with two custom build servers, new gigabit switch, new router and UPS (it was work of art :-)). The servers were based on Intel Xeon CPUs and Supermicro motherboards. I installed the awesome OpenStack system on these servers. We were able to easily host our GitLab, mail server and many other things in OpenStack.

Just before I left I started working on a new simpler job portal workmarket.eu. Also two years after docker was published (2015) I switched everything into docker and started using it everywhere.

In Europa Workintense I learned:

• Leading team of developers
• English
• Doing job interviews (locally and remotely via Skype)
• Code reviews
• Nginx
• Angular.js
• Node.js
• Hosting GitLab on own servers
• Docker with docker-compose
• OpenStack
• CI+CD
• to love automation

and I used these languages/tools/...:

• PHP with OOP
• Nette 2
• Angular.js
• Doctrine with PostgreSQL
• Git
• GitLab with CI and own docker registry

My first job was the development of intranet applications for Osram company.

The first application was for monitoring all the company's computers. It used reports from WinAudit CSV files which were processed and saved into the database.

Main features were:

• See the current state of computers
• See user information
• See the history of computers' changes (HW and SW)
• See the history of computers which each user used
• Email notifications for harddisks running out of space
• Find port in Cisco switch where the computers are connected
• Start remote desktop connection (I forgot the name of the software we used)
• Wake on LAN for any PC
• List all installed applications - useful for licensing purposes

The second application should have been importing software for wages from one system into SAP. Unfortunately, this was not finished.

These applications were integrated into the existing intranet website and used LDAP.

In Osram I learned:

• Doctrine ORM
• Backbone.js
• LDAP + AD
• Nette 2 beta

and I used these languges/tools/...:

• PHP 5.3 with OOP
• Nette 2 beta
• Doctrine + NotORM
• MySQL
• MSSQL
• Backbone.js