I am currently looking for a full-time job in Canada.
Work Experience
Senior Software Engineer/System Architect
@MATERNA Communications, Hradec Kralove, Czech Republic
Jan 2008 - present
- Meeting with customers in early phases of a project; turning their needs to the system, network, data model, use case, performance and sizing analysis.
- Led the team that introduced country-unique MVNE platform; for ~30 MVNO's in Czech Republic and Germany (2013/14).
- Performed successful on-site consultancy for setting up MVNE at Middle East (2016).
- Telecommunications projects (MVNE, BSS) – architecture, analysis, consultancy.
- Creating specifications in very deep detail; self-programming proof-of-concept prototypes where applicable; offering Test Procedures for Test Driven Development.
Operations Team Leader
@MATERNA Communications, Hradec Kralove, Czech Republic
Aug 2007 - Jan 2008
- Introduced network monitoring (Nagios), hardware and service documentation, and production change process.
- Controlled Operations Team with 4 members, schedule duties, set responsibilities and due dates of particular jobs
- Managed project plans and providing status updates to management.
- Hired new personnel, negotiated salaries, conducted monthly 1-by-1 interviews and trained newcomers.
Software Engineer
@MATERNA Communications, Hradec Kralove, Czech Republic
Dec 2004 - Aug 2007
- Built the IVR “Software as a Service” in 2 weeks; it led to acquire key customer.
- Enhanced company's flagship application (message router - MMR) that saved approx. $1,500 equivalent monthly (5% of costs per message).
- Developed a lot of tiny, simple and powerful 24x7 web-based services the agile way.
Linux System Engineer
@MATERNA Communications, Hradec Kralove, Czech Republic
Oct 2003 - Dec 2004
- Proactively supported critical telco infrastructure systems, monitored performance of the systems, reviewed error logs regularly.
- Installed, configured & trouble-shooted Linux-based servers (Gentoo, Red Hat) – WWW, WAP, VoIP services.
- Trouble-shooted through all ISO/OSI layers including down-to-bit analysis
- Performed out-of-workhours standby duties (nights, weekends).
Full-stack Software Developer (PHP/LAMP)
@RYCHLY DRAT, s.r.o., Prague, Czech Republic
2012 - present (part time)
- Analyzed various billing-related bussines processes
- Introduced the plan to overtake billing functions from paid services to own open-source based solution to save ~ $2,000 monthly.
- Developed and deployed many change requests on Linux/Apache/MySQL/PHP/smarty stack
- Setting up data exchange interfaces with Core Network
Volunteer
@HKFREE.ORG community wireless network, Hradec Kralove, Czech Republic
2003 - present
- WAN Area Administrator: planning, building, upgrading and supporting wireless network in rural area, climbing ladders
- Building and troubleshooting SOHO networks
- technologies: WiFi 802.11a/b/g/n/ac (2.4 Ghz, 5.5GHz), microwave links (10, 11, 17 GHz), Linux, OSPF/BGP, mikrotik, RouterOS, Ubiquiti Networks
Education
Internship @Alcatel-Lucent, Dortmund, Germany
Dec 2006 - Jan 2007Tariff Plan Design Workshop: (IN platform for GSM pre-paid customers), hands-on training.
Master of Sciences (Engineer) @Czech Technical University, Prague, Czech Republic
1997 - 2003Electrical Engineering and Informatics, Telecommunication technology
High School Diploma @Electronics Technical College, Pardubice, Czech Republic
1993 - 1997Electronic Computers
Skills - Software Engineering
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Perl |
Excellent. Primary language. |
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PHP |
Excellent. Using MVC template frameworks: Smarty, Nette. |
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Python |
Medium knowledge. |
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Linux |
Excellent. Linux-only user. Debian, Red Hat, Slackware, Fedora, Gentoo, Ubuntu. Scripting with awk, bash, cut, grep, tr, uniq, sort. Active. |
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SQL |
MySQL (excellent), PostgreSQL (good); data modelling, procedures/functions, performance tuning, replication. |
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NoSQL |
CouchDB (good), redis (medium) |
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Node.js |
Basic knowledge. WebSockets and Express.js. |
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C, C++ |
Good knowledge. Past projects in Unix environment incl. networking. |
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HTML, CSS, Javascript |
General knowledge: AJAX, jQuery, Google Closure (basic); Responsive design with Materialize. Angular JS (beginner). |
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Versioning |
Very good. User/administrator of GIT and SVN in team environment. |
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Testing/QA |
Unit testing. Acceptance testing. Selenium. SoapUI. IOT, E2E. Test Driven development. |
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Java |
Basic. J2SE – basic knowledge. Apache/Tomcat, JBoss – operations, troubleshooting. |
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Android |
Android SDK (basic). |
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API/protocols |
Excellent: SOAP, WSDL/XSD; RESTful. Concepting, implementing new server and client sides (various languages), documenting, troubleshooting existing, quick-understanding WSDLs as Telco Consultant. |
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Queue mgmt |
ZeroMQ (good). |
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Virtualization, HA |
Made HA clusters using XEN , DRBD, LVM cluster, Corosync, Pacemaker. |
Skills – Telecommunications & Networking
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MVNE, MVNO |
Very good in understanding Mobile Virtual Network Enabler/Operator concept. Very good analytical experience, combined business, technical, and subscriber view. |
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GSM/UMTS |
Excellent knowledge of SMS and USSD in PLMN (mobile networks). Experience in MAP/TCAP/SCCP/SCTP/MTP stack hacking (SS7, SIGTRAN) with Wireshark. |
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Networking |
Very detailed knowledge, wired and wireless networks, backbone networks, advanced routing (OSPF, BGP) and firewalling (iptables). Common networking platforms: Linux (excellent), Mikrotik (excellent), UBNT (excellent), Cisco (basic). Operating local wireless WAN as a free-time activity. Active. |
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Messaging |
SMS releated infrasctrucure (very detailed knowledge); SMPP, UCP/EMI, MAP. Have done analysis, development, troubleshooting, integration, documentation and training for Materna SMSC. |
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Wireless |
Radio relay microwave links (10, 11, 17 GHz – Alcoma, Summit, Orcave, SVM). WiFi 802.11a/b/g/n/ac (2.4 Ghz, 5.5GHz - Mikrotik, Ubiquiti Networks). Fiberless optics. Calculation of RF links (theory), building (working at heights), maintaining (outdoor work in any weather). |
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TCP/IP |
Very detailed knowledge, design, building & administration of networks and servers. Specification of new protocols. Deep analysis with Wireshark. (Fast)CGI, SSH & tunelling, remote administration of servers, SSL and certificates, OpenVPN/IPSEC. |
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VoIP |
Very good knowledge of Asterisk configuration, SIP and IAX2. |
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IVR |
Excellent in setting up both technology and content of IVRs, tailored differently project by project. Using text-to-speech, native speakers or both. |
Languages
| English | Advanced. Fluent communication both in spoken and written form. | |
| Czech | Native speaker. | |
| German | Elementary. | |
| Russian | Elementary. |
Top Projects
The Message Router - MMR
Cost- and quality-driven realtime SMS routing. Stable company's cash-cow since 2005.
Multi-threaded design (~300 processes in “ps” output)
Advanced routing: semaphores, continuous e2e auto testing, 4-level routing table, number portability, per-message capabilities.
Utilizes: Perl, Linux, ext4, MySQL, https, IPSEC, OpenVPN, gammu.
Typical customer: Bank, e-shop, public transport.
Enterprise SMS Gateway – AWEG
Sending mass SMS via REST, Web App, or Windows App.
Core – webservice – SMPP – PHP web client - linux client – windows client.
Multi-threaded design (~40 processes in “ps” output).
public web frontend
Utilizes: Perl, Linux, ext4, MySQL, https, PHP, Python, C#, Windows, HTML, CSS.
Typical customer: medium to small retail store.
Premium Services Portal - PSP
Consumer contest for retail product marketing.
Consumer contest for retail product marketing: SMS or WEB based. Software as a service.
Multi-threaded design (~40 processes in “ps” output).
http://psp.maternacz.com/pspmaterna/
Utilizes: Perl, Linux, MySQL, https, PHP, SOAP, HTML, CSS.
Typical customer: marketing agency, food brand (Nestle)
MVNE platform
Run your own brand for mobile communications. Add own SIM card into your product portfolio. Prepaid or postpaid. Virtual Cellular Network as a Service.
Asynchronous Perl workflow engine – SOAP partner interface – REST enduser interface – IVR – customer care – mediation – rating – billing – invoicing – provisioning – ring-in® authentication.
MVNO Brands: example #1 - example #2 - example #3 - example #4
Utilizes: Linux, Perl, shell, syslog-ng, SOAP/WSDL, REST, callbacks, Java, OpenVPN, MySQL, PostgreSQL, Javascript, Google Closure, Plovr, HTML, CSS.
Typical customer: Internet Service Provicer, Cable TV Provider.
Vending Cashless Payment
Customers of public vending machines are no longer anonymous
Customers gain coinless payment and discounts. Vending machine provider gain less cash manipulation and more data of customers.
Vending brands: example #1 example #2
Utilizes: Linux, Perl, shell, syslog-ng, REST, callbacks, MySQL, Javascript, Android, iOS, QR, GSM/UMTS, HTML, CSS.
Mobile Quiz Games
multi-language, multi-tenant platform for mobile games
Single quiz, duel quiz, tournament. Target group: football and hockey fans. Software as a Service.
Message-based WebSocket TCP/IP communication protocol – powerfull server-side – simple iOS/Android clients – comprehensive CMS
Demo application: google play
Utilizes: Linux, Node.js, ZeroMQ, CouchDB, MySQL, WebSockets, AWS S3 CDN, Android, iOS, HTML, CSS.
HKfree.org
No broadband ISP in our area? No problem, let's build our own.
Started in 2003 by us group of IT enthusiasts, now carrier-grade MAN still based on volunteering.
community web – cloud map – webcams
Utilizes: Free Bands (2,4 – 5,5 GHz – 11 GHz), Licensed Bands (17 GHz), IPv4, IPv6, OSPF, Linux, Quagga, Mikrotik/RouterOS, copper, optics, UPC, iptables, tc, bolts, ladders, towers.
