Pavel Valach
Student, programmer, network engineer
About
I have considerable experience with software development, network administration and user support. I believe that I am patient and understanding, with a sense of detail. Currently studying at FIT, CTU in Prague, study branch Computer Security and Information Technology.
Experience
Integration of Ubuntu in a Windows-only network of ~25 computers in a classroom.
- Active Directory integration into Ubuntu using Samba, automatically mounted network shares with help of Kerberos
- Automatic updates, backups, optimizations for 16Mbit/s internet connection (APT proxy)
- Puppet used for centralised management
- Talked about it at LinuxDays 2013
grouptime GmbH
Engineered the WinRT port of Teamwire, a business instant messaging solution.
- Port of iOS and Android version to WinRT (Windows Phone 8 and Windows 10 Mobile)
- Integration of OpenSSL for encryption features and SQLCipher for encrypted internal storage
- Backend: Implemented APNS2 message sending and several other features
Maintaining computer network for 450 people and >600 devices. Collaborating with Silicon Hill.
- User support, including online
- Administering servers running Gentoo/Debian/Ubuntu
- Management of network comprised of Cisco, 3Com, Juniper, Ruckus devices
- 802.1X, RADIUS deployment with existing user database in PostgreSQL
- Converting network hosts and services to containers (LXC) and VMs
- Organization and performing of fiber optics core network construction in 2018
- Organization and performing of Cisco->Juniper switch in 2018
GoodVision s.r.o.
System and developer operations of our Prague office, making sure that systems and research run smoothly and securely.
- Managing AWS services used by the company
- Deployed identity management using multi-master FreeIPA
- Ubuntu and CentOS server management using Ansible
CESNET, z. s. p. o.
System administration. Involved in the Honeypot-as-a-Service project.
Education
CTU in Prague, Faculty of Electrical Engineering
CTU in Prague, Faculty of Information Technology
Volunteer
CTU Student Union
Coordinating technical and network efforts across CTU SU clubs. Maintaining healthy relationship with CTU and partners.
Skills
- Windows Forms
- Windows Runtime
- C#, C++
- WPF, XAML
- C, C++
- Python
- Kernel configuration and patching
- Bash scripting
- Debian/Gentoo configuration
Languages
Interests
- Windows Mobile (6 -> 7 -> 8 -> 10)
- Android 8
- IPv6
- Mobile and cellular networks
- Network traffic analysis
- Playing piano