2 English: technical: fluent, general: communicable
5 Licenses: motorcycle, car
6 eMail: job@jankratochvil.net
7 Projects: http://www.jankratochvil.net/project/
8 Resume: http://www.jankratochvil.net/resume/
12 Contractor - software engineer. Technical achievements highlights:
14 * Captive NTFS - The first free read/write NTFS for free OS.
15 Project included MS-Windows NT kernel reverse engineering.
17 * MMS2 - MMS Center / billing - Independent startup business attempt.
23 2005/04-11: VA Linux Systems Japan
24 Linux kernel based development
26 2004/01-11: Sun Microsystems
27 Java Enterprise System Quality Assurance (JES QA), technical lead
28 JES components compatibility analysis, automation of QA tasks, JES testing,
29 QA frameworks pilot deployments, architecture and lead of the team projects,
30 team programming guidelines
33 Freelance Commercial Projects
34 -----------------------------
36 2005: MMS2: Alternative center for cheaper mobile phones multimedia messages (MMS)
37 Web interface was outsourced.
38 Commercial service management held together by company JK-Invent.
39 * Designed to coexist with existing GSM networks service servers
40 * MMSE/WAP-Push/web/mail convergency featuring smart transformations
41 * Credits charging by ISDN IVR + automatic bank transaction acceptance
42 * Completed mobile phones firmware bugs analysis and workarounds
43 * Free gatewaying program to avoid targetted GSM operators firewalling
45 2004: HotelGate: Internet Public Access Gateway
46 Plug&Play TCP/IP for clients, selectively ticketed and/or free access,
47 simplified interface for reception desks, easy and unified management.
48 European facility installations provided by JK Labs.
50 2002-2003: Captive: The first free NTFS read/write filesystem for GNU/Linux
52 Analysis of portions of 80MB+ i386 disassembly dumps of MS-Windows XP kernel
53 and ntfs.sys for the first binary compatible reimplementation of the
54 undocumented XP kernel subsystems.
55 Written TraceFS: Microsoft Windows Kernel API Tracer: MS-Windows Kernel API
56 Tracer as native W32 kernel hooking driver for run-time analysis of the NT
57 Cache Manager XP kernel subsystem.
58 UNIX userland of Captive provides GnomeVFS interface to the MS-Windows kernel
59 based MS-Windows filesystem isolated by the CORBA/ORBit interface.
65 2001-2002: Advanced Telecom Services
67 * MMS framework client via EuroTel GSM operator
68 by technologies GSM MMS, Perl, XML, SOAP
69 Project included pilot MMS Center debugging with Ethereal,
71 * Multimedia EMS support implemented by GSM::SMS patch
72 * Implementation of protocol BIP (based on Nokia CIMD2 protocol) for GSM SMS
73 Center direct communication by extending gnokii for EuroTel GSM operator
76 Partition Surprise: GPLed Partition Magic clone
77 Project was completed as a team work. The code is based on Gnome
78 technologies. As one of the subtasks to keep system bootability I implemented
79 Int13Sniff to ease Microsoft boot loaders disassembly across partition
83 Mobile technologies for embedded devices
84 * Completed debugging of gnokii GSM software modem for Nokia 5190
85 * Port of gnokii and my mdsms (Mobile Device SMS Tool) to embedded uClinux
88 System administration of GNU/Linux and FreeBSD,
89 techsupport: GuestNET, Eclipse, GlobaLoop, Fresco
90 Ad hoc technical support challenges such as i386 IRQ redirector, Middleman
91 port (HTTP proxy ported to FreeBSD) or ssht (Unattended intranet host
92 accessibility by SSH tunnel).
95 tac_plus auth: Cisco TACACS+ NAS host based authorization
98 Technical translations from English
101 Mobile technologies, embedded devices
102 * 332: AmigaOS kernel port to embedded Motorola 68332
103 * Siemens M1 GSM modem daemon for GPS, client/server setup,
108 * MobilDock SMS Tool: SMS communication software for Digital UNIX
110 1998: European Law Students' Association
111 STEP: Custom web database application incl. fixes of PHP and PostgreSQL
113 1993-1996: Profes J&K
114 PC assembly and customer service
117 StampMan: Database application (MS-DOS: Pascal, plainTeX)
120 For referees e-mails please see: http://www.jankratochvil.net/resume/
126 1997: Bronze medal in the International Olympiad in Informatics, Cape Town
127 1997: 2nd in an MO-P national contest - mathematics Olympiad, the programming
128 1997: 1st in the International Competition in Programming
129 1996: 4th in the International Competition in Programming
130 1995: 7th in the Central European Olympiad in Informatics
137 mobile technologies, filesystems, embedded devices
139 GNU/Linux/i386/UNIX/FreeBSD, W32 kernel, Amiga/680x0, MS-DOS, ZX Spectrum,
142 C (Gnome/GCC), Perl, bash/awk/sed..., Java, C++, Pascal, Basic, REXX, S-Lang,
145 autoconf, automake, libtool, m4, CVS, gettext, bison, flex, ld script,
148 i386/x86_64, Motorola 680x0, Zilog Z80, Intel 8051, MIPS R2/3000,
151 HTML/XHTML, CSS, PHP, SQL (PostgreSQL, MySQL), JavaScript, CGI
153 plainTeX, LaTeX, DocBook, DocBook Lite, XML/NS/Schema, gtk-doc, nroff, pod
155 Gnome/GTK+/GLib, POSIX/BSD/SysV/threads/sockets, X11, OpenGL, NCurses,
156 S-Lang, GnomeVFS, libxml, libneon, SVGALib, NIS, Qt,...
158 CORBA/ORBit, SOAP, WSDL, Sun RPC
160 GSM SMS/PDU/Nokia Smart Messaging/EMS/WAP/WTP/WSP/MMSE/SMIL/WML/AMR/ETSI
161 stds/3GPP stds, IPv4, HTTP, SMTP/RFC822/MIME, FTP, SSH, DHCP, POP3, IMAP4,
162 NFS v2/v3, PPP/LCP/IPCP,...
164 ext2, FAT, AmigaFFS, ISO-9660