9 Caire Terrace
San Francisco, CA 94107
Seeking challenging technical position as an architect in software development, operating system programming or systems administration, preferably on FreeBSD based UNIX systems.
Highly adaptive and experienced kernel programmer and UNIX system administrator with management experience. Experienced in distributed computation, low level programming, assembly language, optimization and device driver programming.
Expertise programming with C, C++ and python in the UNIX environment.
C (Unix and PC environment 9 years) (expert), UNIX shell programming (sh/zsh) (9 years) (expert), php (6 years) (expert), C++ (OOP/STL) (5 years) (expert), Python (highly skilled), Pascal (highly skilled), Perl (highly skilled), SQL (highly skilled), 80x86 Assembly (on MS-DOS) (highly skilled), Java, LISP/Scheme, APL, FORTRAN, COBOL, PROLOG, HTML, Basic, tcl/tk, PA-RISC 2.0, PPC, Sparc v9 assembler, VAX Assembly.
make (Berkeley and GNU) (expert), lex/flex (expert), yacc/bison (expert), CVS (highly skilled), grof (highly skilled), GDB (highly skilled), Valgrind, Purify, Perforce, ddd.
FreeBSD (expert), OS X (highly skilled), NetBSD, OpenBSD, Redhat Linux, SGI IRIX 6.x, Sun Solaris (sparc/x86: 2.6), Sun-OS 4.1.1, Redhat Linux, HPUX.
FreeBSD (expert), NetBSD, OpenBSD, Redhat Linux, SGI IRIX 6.x, Sun Solaris (sparc/x86: 2.6), Sun-OS 4.1.1, Redhat Linux.
TCP/IP (expert), UDP (expert), NFS (expert), RPC (expert), HTTP, FTP, SMTP, NNTP, Disk IO subsystems (SCSI/FC), Ethernet Drivers.
Humor Rainbow Inc, OkCupid.com
July 2005-August 2006
Chief technical officer. Responsible for all technical aspects of Okcupid's direction. Duties included managing the software team, recruiting, data center management and deployment, office deployment, release engineering, source control, UNIX administration and developing code. Responsible for software development, website uptime.
Created an linearly scalable system to replace a failure prone and non-scalable solution. Using two servers (but scalable to the hundreds) I fit a large subset of the users into physical ram using a custom R-star tree to locate users that are adjacent. Additionally a distributed cache (modeled after the memcached project) was modified to allow for distributed computation of match results.
This system replaced a mysql backed system and was able to perform a better job using half the hardware of the old system at a fraction of the complexity and maintenance of the old system.
Additionally this system allowed for "fast path" access for several important data points for users.
Our image servers were located at a separate hosting facility. Reliability problems at the hosting facility prompted me to move the machines to our local co-location facility. To maximize reliability, once the servers were made local, they were put behind a load balancer and made 100% redundant. Prior to this work, if an image server went down we lost images on the site until a manual switch over was done.
Authorized to add/change code in the FreeBSD operating system.
April 2004-April 2005
Senior technical Yahoo. Responsible for search operations and optimization.
Apple Computer Inc.
November 2002-March 2004
Tasked with enhancing and fixing Apple Computer's OS X operating system implementation of NFS.
Tasked with creating the AutoFS filesystem for Apple Computer.
Clickarray (now known as Array Networks)
June 2001-October 2001
Unix kernel developer (FreeBSD).
Developed TCP-splicing implementation. ftp://ftp.monarch.cs.cmu.edu/pub/dmaltz/msocks-infocom98.ps.gz ftp://ftp.monarch.cs.cmu.edu/pub/dmaltz/splice-perf-tr.ps
March 1999-March 2001
Senior Architect, Programmer, Systems administrator, on call 24/7.
Hot Jobs Inc.
May 1998-March 1999
Unix C programmer projects included; spell checking engine to improve data entry, NNTP (news) posting module, text search engine. Reslex(tm) engine to extract information from unformatted resumes. HTML upload module. All work used for back end to CGI systems. Various database conversion projects. Platforms worked on; SGI Irix 6.2, Sun Solaris 2.6, FreeBSD 3.0
(part time contracting)
December 1998-March 1999
Administration of large web servers running the FreeBSD 3.0 system for SMP configurations. Management of virtual mail and web service redirection. Current Project involves reorganizing topology for more efficient throughput and ease of management. Scripting for statistics retrieval at regular intervals.
SUNY Tech Telecommunications Department
March 1998-July 1998
Installation and maintenance of SUNY tech tele-com dept. legacy UNIX server (Sun-OS 4.1.1), installation, securing and maintenance. Enabled telecommunications department to run legacy software for training.
September 1997-July 1998
Contacted by VESID (New York State Educational Dept. Office of Vocational and Educational Services for Individuals with Disabilities) to tutor student.
Provided tutoring for individuals facing challenges in academia. Tutored programming in the UNIX environment. C, C++, CGI, familiarizing students with the school BSD/HP-UX heterogenous environment.
SUNY Tech Learning Center
March 1997-July 1997
Tutoring students to assist in programming, and UNIX system administration at the SUNY Tech Learning Center. Comparable to my experience with VESID (above). Brought many "C", "D", and "F" students to "B" and "C" grades.
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Last modified July 2006.
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