Ondrej Vlach
Web backend developer & DevOps engineer
About me
I am a backend web developer and DevOps engineer with extensive experience. I have been working in the field since 2004, starting my career as a PHP developer and gradually growing into a DevOps role. During my career, I took a two-year break to work in the non-profit sector. I have hands-on experience with technologies such as Jenkins, GitLab CI/CD, Docker, Kubernetes, PHP, Rust, and others. In the past, I worked for companies such as Uložto and ČTK, where I focused on developing applications for the general public as well as high-traffic systems. Most recently, I worked at Balíkobot, where I contributed to the development of an API “bridge” connecting e-commerce platforms with logistics providers and carriers. My goal is not only to address current development needs but also to introduce new technologies and efficient engineering practices. Outside of work, I am deeply involved in 3D printing and programming. I am currently developing my own smart home solution, including touch-screen control panels and a custom automation server. I also run my own Kubernetes cluster, experiment with new technologies, and continuously expand my skills. My other interests include science fiction, reading, and hiking with my dog.
Professional Skills
PHP
SQL
Rust
Go (Golang)
C++
C
Bash
Python
Groovy
JavaScript/ECMAScript
Kotlin
Java
HTML
CSS
Elasticsearch
Containerization (OCI ecosystem: Docker, Podman)
Kubernetes
OpenStack
Jenkins
Gitlab CI/CD
Gitea actions
Helm
Kustomize
Puppet
Ansible
ArgoCD
Prometheus
Grafana
Loki
Tempo
Memcache
Redis
LDAP
Frameworks and databases
Rocket (rocket-rs)
Nette
Symfony
CodeIgniter
React
Vue.js
Goyave
ESP-IDF
MySQL
PostgreSQL
Tools:
Claude,
Codex,
Git,
docker,
docker compose,
helm,
iptables,
ufw,
kanidm,
promtail,
json-rpc,
rest,
nginx-ingress,
nginx,
calico,
IPv6,
make,
sentry,
heat,
debuild,
pip,
cargo,
pyscaffold,
platformio,
esp-idf,
OpenTelemetry,
operating systems:
Linux (any) - Expert,
Kairos (Linux) - Master,
NixOS (Linux) - Master,
Windows - Beginer
Languages:
Czech - Native language
,
English - Passive technical
Work experience
Senior PHP Developer at Balíkobot, s.r.o.
[PHP, HTML, Bash, MySQL, CodeIgniter, Gitlab CI/CD, MySQL]
02/2025 - 2026
Senior PHP Developer at SupportBox s.r.o.
[PHP, Bash, JavaScript, Vue.js, AWS S3, MySQL, Symfony, Doctrine, Redis, Gitlab CI/CD, Elastic Search]
2024 - 2025
Development of a customer care tool (Symfony, Percona, AWS S3, Doctrine, Redis, Vue.js), implementation of support tools (Sentry), and improvement of containerization on the lab environment.
DevOps Engineer at Nubium Development SE
[PHP, Python, Bash, Puppet, Ansible, Groovy, Java, Docker, Kubernetes, OpenStack, Jenkins, Gitlab CI/CD, Grafana, Kibana, Sphinx, Docker, Elastic Search, MySQL, PostgreSQL, make, Redis, Memcache, Docker compose, Kustomize, Debian packages, PIP packages, CEPH, Heat]
2019 - 2024
Development of tools for deployment and management of development environments for the Uložto application (the largest Czech data storage),
design and management of supporting production technologies (self-hosted Sentry, Jenkins, GitLab CI), development of tools
for automatic creation of development environments (36 "full" development environments - web, CDN app (no files), databases (full obfuscated db/minimalistic db mode),
support tools (Sentry, mailing, etc.)) on a "click."
Writings tool for CD. Writing roles in Puppet, designing dashboards in Grafana, supporting development regarding infrastructure.
Writing pipelines in GitLab and Jenkins related to environment creation, testing, packaging, creating Docker containers, etc.
Working with OpenStack, Heat, Ceph. Gradual Kubernetes implementation.
PHP Developer at Nubium Development SE
[PHP, Ruby, Python, Bash, vagrant, Jenkins, Gitlab, Ansible, Memcache, Redis, Make, MySQL, PostgreSQL, Sphinx]
2013 - 2019
Development of the Uložto application, development of payment systems (credit card payments, SMS payment), development of developer tools (packaging, git-bpf),
deployment pipelines, vagrant boxes...
Local director at non-profit organization at O.S. POMASZ
[PHP, SOAP, CSS, HTML]
2010 - 2012
Ensuring the smooth operation of the branch,
recruiting temporary workers, collecting financials from temporary
workers and managing them, building relationships and negotiating with partners
of the POMASZ Nonprofit Organization, handling administrative tasks,
and participating in management. Simultaneously, developing the
intranet and overall IT within the POMASZ non-profit Organization
(computer management, designing technical solutions, etc.).
PHP Developer a Zend Framework specialist at Internet Projekt a.s.
[PHP, SOAP, CSS, HTML]
2009
Implementation of the core components for intranets and publicly
accessible web apps for a large Czech energy company (RWE).
PHP Developer and PostgreSQL specialist at ILIKETHIS! s.r.o
[PHP, Perl, XML, SOAP, CSS, HTML]
2007 - 2008
Database design and system development for storing photos and metadata for
a press agency (approximately 1,000,000 photos), development of a search engine,
and implementation of synchronization between the internal client system and the
new web system (SOAP). Development of procedures and consultations in PostgreSQL,
data model design.
Developer at ASW Systems s.r.o.
[PHP, JavaScript, Java, XML, CSS, HTML, Linux]
2006 - 2007
Developing internal information system. Internal "webcore" framework (based on MVC) development. External web apps development.
Developer at Radiokomunikace a.s.
[PHP, JavaScript, Java, XML, CSS, HTML, Linux]
2005 - 2006
Developing internal information system (T–PIS)
Junior Developer at Lundegaard s.r.o.
[PHP, CSS, JavaScript, HTML, Linux]
2004
Web apps developer
Freelance jobs
Freelance Developer & Consultant at myself
2012 - 2023
External web developer consultant
External consultant and developer at YAGAR s.r.o.
[PHP, JavaScript, XSLT, XSL-FO, HTML, CSS, MySQL]
2007
Consultation in the design of applications, development of an application for processing payments and servicing an e-shop
External consultant and developer at PragueDesign - Pavel Moravec
[Python, Perl, PHP, JavaScript, XML, HTML, CSS, PostgreSQL]
2006
Optimization of the web application RSSMAD – Optimization of data structure,
performance code optimization (in PHP), design and implementation of a component for
downloading a large number of files in XML format (exports in RSS and Atom) from
various web applications, followed by parsing and storage in a database