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32 /Title(Jan Kratochvil Resume)
33 /Author(Jan Kratochvil)
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50 \begin{tabular*}{0.57\textwidth}{|@{\extracolsep{\fill}}c@{\extracolsep{\fill}}l@{\extracolsep{\fill}}l@{\extracolsep{\fill}}|}
53 {} & name & Jan Kratochvil \\
54 {} & English & fluent\ \ \ \\
56 {} & e-mail & \href{mailto:job@jankratochvil.net}{job@jankratochvil.net} \\
57 {} & projects before 2005\ \ & \href{https://www.jankratochvil.net/project/}{https://www.jankratochvil.net/project/}\ \ \\
58 {} & resume & \href{https://www.jankratochvil.net/resume/}{https://www.jankratochvil.net/resume/} \\
59 {} & OpenPGP & \href{https://www.jankratochvil.net/pgp-JanKratochvil.txt}{1E3AD15E} \\
66 \caption{Fulltime Jobs}
67 \begin{tabular*}{\textwidth}{|lp{1.2in}@{\extracolsep{\fill}}p{4.35in}|}
69 Date & Company & Description \\
72 2022-\dots & \href{https://www.azul.com/}{Azyl Systems} &
73 Development of OpenJDK in C++/C/assembler.
77 2022 & \href{https://www.barclays.co.uk/}{Barclays} &
78 Software development in C++.
82 2006-2021 & \href{https://www.redhat.com/}{Red Hat} &
83 \href{https://en.wikipedia.org/wiki/LLDB_(debugger)}{LLDB} debugger developer and
84 formerly \href{https://en.wikipedia.org/wiki/GNU_Debugger}{GDB} debugger developer.
86 \href{https://en.wikipedia.org/wiki/GNU_Debugger}{GDB} developed primarily 2007-2013, 1231 commits:
87 \href{https://github.com/bminor/binutils-gdb/commits?author=jankratochvil}{log}.
89 I was GDB maintainer for \href{https://en.wikipedia.org/wiki/Fedora_(operating_system)}{Fedora}\&\href{https://en.wikipedia.org/wiki/Red_Hat_Enterprise_Linux}{RHEL}.
90 Larger features I have implemented: \href{https://en.wikipedia.org/wiki/Position-independent_executable}{PIE} support,
91 DWARF-5 entry values \& tail calls, Fortran modules, DWARF-5 excl. DWO incl.
92 .debug\_names index producer \& consumer excl. namespaces. Implemented in
93 Fedora but never upstreamed: C\&Fortran \href{https://en.wikipedia.org/wiki/Variable-length_array}{VLA}, build-id.
95 \href{https://en.wikipedia.org/wiki/LLDB_(debugger)}{LLDB} developed 2017-2021, 159 commits:
96 \href{https://github.com/llvm/llvm-project/commits?author=jankratochvil}{log},
97 \href{https://reviews.llvm.org/p/jankratochvil/}{reviews}.
99 Developed \href{https://sourceware.org/systemtap/wiki/utrace/tests}{Linux kernel ptrace testsuite} (most of the testcases are mine).
101 My presentations about \href{https://en.wikipedia.org/wiki/GNU_Debugger}{GDB}:
102 \href{https://www.jankratochvil.net/resume/DeveloperConference2011-debug.pdf}{2011}
103 \href{https://www.jankratochvil.net/resume/gdb2012.pdf}{2012}
104 \href{https://www.jankratochvil.net/resume/devconf2017.pdf}{2017}
106 My presentation about \href{https://en.wikipedia.org/wiki/LLDB_(debugger)}{LLDB}:
107 \href{https://www.jankratochvil.net/resume/devconf2019.pdf}{2019}
109 My article about \href{https://en.wikipedia.org/wiki/LLVM}{LLVM}/\href{https://en.wikipedia.org/wiki/AddressSanitizer}{Sanitizers}:
110 \href{https://developers.redhat.com/blog/2021/05/05/memory-error-checking-in-c-and-c-comparing-sanitizers-and-valgrind#}{2021}
112 My \href{https://en.wikipedia.org/wiki/DWARF}{DWARF} standard
114 \href{http://www.dwarfstd.org/ShowIssue.php?issue=100416.1}{1}
115 \href{http://www.dwarfstd.org/ShowIssue.php?issue=090321.1}{2}
116 \href{http://www.dwarfstd.org/ShowIssue.php?issue=161215.3}{3}
117 \href{http://www.dwarfstd.org/ShowIssue.php?issue=161113.1}{4}
118 \href{http://www.dwarfstd.org/ShowIssue.php?issue=110926.1}{5}
119 \href{http://www.dwarfstd.org/ShowIssue.php?issue=100923.1}{6},
121 \href{http://www.dwarfstd.org/ShowIssue.php?issue=161102.1}{1},
122 \href{http://www.dwarfstd.org/ShowIssue.php?issue=170527.1}{2},
124 \href{http://www.dwarfstd.org/ShowIssue.php?issue=161027.1}{1}.
126 My \href{https://lab.llvm.org/staging/#/builders/16}{LLDB buildbot}, its \href{https://github.com/llvm/llvm-zorg/commits?author=jankratochvil}{implementation}.
128 Completed \href{https://en.wikipedia.org/wiki/Red_Hat_Certified_Engineer}{RHCE} certificate \href{https://rhtapps.redhat.com/verify?certId=110-518-099}{110-518-099}.
130 Wrote many bugfixes and bugreports for various components of \href{https://en.wikipedia.org/wiki/Fedora_(operating_system)}{Fedora}
131 \href{https://en.wikipedia.org/wiki/Free_software}{Free} operating system.
135 2005 & \href{https://www.valinux.co.jp/}{VA Linux Systems\hfil\newline Japan} &
136 \href{https://www.kernel.org/}{Linux kernel} -- first ever Linux kernel relocatability
137 for~\href{https://en.wikipedia.org/wiki/Kdump_(Linux)}{kdump}-alike,\linebreak
138 \href{https://en.wikipedia.org/wiki/Network_File_System}{NFS (Network File System)} server caching
142 2004 & \href{https://en.wikipedia.org/wiki/Sun_Microsystems}{Sun Microsystems} &
143 \href{https://en.wikipedia.org/wiki/Sun_Java_System}{Sun Java Enterprise System} Quality Assurance (JES~QA), technical lead
150 \vskip\intertableskip
154 \caption{Freelance Projects}
155 \begin{tabular*}{\textwidth}{|l@{\extracolsep{\fill}}p{5.7in}|}
157 Date & Description \\
160 \hypertarget{captive}{2002-2003} & \href{https://www.jankratochvil.net/project/captive/}{Captive}: The first free NTFS read/write filesystem for Linux OS
162 Featured \href{https://tech.slashdot.org/story/03/12/02/1536227/using-the-real-ntfssys-driver-under-linux}{on slashdot}.
164 Reverse engineered i386 MS-Windows XP kernel and ntfs.sys for the first
165 binary compatible reimplementation of the undocumented parts of MS-Windows
168 Userland part of the project provides \href{https://en.wikipedia.org/wiki/GnomeVFS}{GnomeVFS} interface to the MS-Windows kernel
169 based MS-Windows filesystem isolated by the
170 \href{https://en.wikipedia.org/wiki/Common_Object_Request_Broker_Architecture}{CORBA}/\href{https://en.wikipedia.org/wiki/ORBit}{ORBit}
173 For development purposes I implemented also \href{https://www.jankratochvil.net/project/TraceFS/}{TraceFS}:
174 MS-Windows Kernel API Tracer as a~native MS-Windows kernel driver for
175 tracing of the NT Cache Manager.
179 \hypertarget{mms2}{2005-2006} & \href{https://www.jankratochvil.net/product/mms2/}{MMS2}: Alternative center for cheaper mobile phones multimedia messages (MMS)
183 2004 & \href{https://www.jankratochvil.net/product/hotelgate/}{HotelGate}: Internet gateway for hotel guests
190 \vskip\intertableskip
194 \caption{Contractor Jobs}
195 \begin{tabular*}{\textwidth}{|lp{0.7in}@{\extracolsep{\fill}}p{4.95in}|}
197 Date & Client & Description \\
200 2001-2002 & \href{https://www.atspraha.cz/en/}{Advanced\newline Telecom\newline Services} &
201 Early cell phone technologies:
202 \href{https://en.wikipedia.org/wiki/Multimedia_Messaging_Service}{MMS} framework development incl. \href{https://www.jankratochvil.net/etmms/}{MMS Center debugging}
203 (written using \href{https://en.wikipedia.org/wiki/Perl}{Perl}, \href{https://en.wikipedia.org/wiki/XML}{XML}, \href{https://en.wikipedia.org/wiki/SOAP}{SOAP}),
204 Multimedia EMS support (my~\href{https://www.jankratochvil.net/project/gsmperl/}{GSM::SMS patch}),
205 BIP (Nokia CIMD2 alike) protocol client by extending (\href{https://www.gnokii.org/}{gnokii}).
209 1999-2000 & \href{https://www.suse.com/}{SuSE} &
210 \href{https://www.jankratochvil.net/project/surprise/}{Partition Surprise}: superseded by \href{https://en.wikipedia.org/wiki/GParted}{GParted}
212 It was implemented by multiple people of our team. For development purposes I~implemented
213 \href{https://www.jankratochvil.net/project/int13sniff/}{Int13Sniff} for bootability troubleshooting.
217 2001-2002 & \href{https://www.readynote.com/}{ReadyNote} &
218 Early cell phone technologies: debugged \href{https://www.gnokii.org/}{gnokii} GSM software modem, ported \href{https://www.gnokii.org/}{gnokii} and my
219 \href{https://www.jankratochvil.net/project/mdsms/}{mdsms} to embedded \href{https://en.wikipedia.org/wiki/UClibc}{uClibc}.
223 1999-2003 & \href{https://jklabs.cz/}{JKLabs} &
224 Support of company systems, hotel installations,
225 technical challenges like an i386 IRQ redirector,
226 \href{https://www.jankratochvil.net/project/middleman/}{Middleman port} (HTTP modifying proxy) or
227 \href{https://www.jankratochvil.net/project/ssht/}{ssht} (SSH tunnel).
231 2001 & \href{https://www.gts.cz/cz-en}{GTS} &
232 \href{https://www.jankratochvil.net/project/tac_plus/}{tac\_plus auth}: Cisco TACACS+ NAS host based authorization
236 1998-1999 & \href{https://www.geoinvest.cz/}{Geoinvest} &
237 Early cell phone technologies -- Siemens M1 GSM modem daemon for GPS,
238 embedded devices -- \href{https://www.jankratochvil.net/project/332/}{332}:
239 \href{https://en.wikipedia.org/wiki/AmigaOS}{AmigaOS} kernel port to embedded \href{https://en.wikipedia.org/wiki/Freescale_683XX}{Motorola 68332}.
243 1999 & \href{https://www.tencom.cz/}{TENcom\newline Trade} &
244 Early cell phone technologies -- \href{https://www.jankratochvil.net/project/mdsms/}{mdsms}:
245 \href{https://en.wikipedia.org/wiki/SMS}{SMS} software for \href{https://en.wikipedia.org/wiki/Digital_UNIX}{Digital UNIX}.
250 \href{https://www.jankratochvil.net/project/step/}{STEP}:
251 A~web database application. Fixed Free Software
252 \href{https://www.jankratochvil.net/project/phphash/}{PHP} and
253 \href{https://www.jankratochvil.net/project/pgsqlsubstr/}{PostgreSQL}.
257 1993-1996 & Profes J\&K &
258 PC assembly and customer service
262 1993 & \href{http://www.japhila.cz/}{Japhila} &
263 StampMan: Database application (MS-DOS: Pascal, plainTeX)
275 \begin{tabular*}{\textwidth}{|l@{\extracolsep{\fill}}p{6.15in}|}
277 1997 & Bronze medal (not 3rd) in International Olympiad in Informatics, South Africa -- Cape Town \\
278 1997 & 2nd in MO-P national contest -- mathematics Olympiad, the programming category \\
279 1997 & 1st in International Competition in Programming \\
280 1996 & 4th in International Competition in Programming \\
281 1995 & 7th in Central European Olympiad in Informatics \\
286 \vskip\intertableskip
290 \caption{Technologies (mostly obsolete in 2021)}
291 \begin{tabular*}{\textwidth}{|l@{\extracolsep{\fill}}p{5.10in}|}
293 % Major Areas & mobile technologies, filesystems, embedded devices \\
294 Platforms & Linux OS/i386/FreeBSD, MS-Windows i386 kernel, Amiga/680x0, MS-DOS,
295 ZX Spectrum, PC-E500S \\
296 Languages & C++14, C, Perl, Python, bash/awk/sed...,
297 Java$\le$1.0, Pascal, Basic, REXX, S-Lang, Foxplus, Prolog \\
298 Tools & GIT, cmake, SVN, autoconf, automake, libtool, m4, CVS, gettext, bison, flex, ld~script \\
299 Assemblers & i386/x86\_64, briefly aarch64/arm7/s390x/ppc64, Motorola 680x0, Zilog~Z80, Intel 8051, MIPS R2/3000 \\
300 WWW & HTML$\le$4.0, CSS, PHP, SQL (PostgreSQL, MySQL), JavaScript, CGI \\
301 Documentation & plainTeX, LaTeX, DocBook, DocBook Lite, XML/NS/Schema,
302 gtk-doc, nroff, pod \\
303 Libraries & Gnome/GTK+/GLib, POSIX/BSD/SysV/threads/sockets, X11, OpenGL, NCurses,
304 S-Lang, GnomeVFS, libxml, libneon, SVGALib, NIS, Qt,
306 CORBA/ORBit, SOAP, WSDL, Sun~RPC \\
307 Protocols/Formats & GSM SMS/PDU/Nokia~Smart~Messaging/EMS/WAP/WTP/WSP/MMSE/SMIL,\hfill\newline
308 WML/AMR/WSP/AMR, GSM ETSI/3GPP stds, IPv4, HTTP, SMTP\hfill\newline
309 RFC822/MIME, FTP, SSH, DHCP, POP3, IMAP4, NFS~v2/v3, PPP/LCP/IPCP,
311 ext2, FAT, AmigaFFS, ISO-9660 \\