Resume in:

1. GitHub

   I am a member of the GitHub Developer Program and an active user of GitHub with 64K contributions in the last year across 158 repositories.

   

2. Perl.

   Please see my Perl module Data::Table::Text which I wrote to spread work across multiple instances running on Amazon Web Services EC2 while converting all 1719 of Hewlett Packard Enterprise 's manuals describing their operations from DocBook Xml to Dita Xml as noted in this email:

   

   A Perl one line program to transpose a two dimensional square array $a:

   {($$a[$$_[1]][$$_[0]], $$a[$$_[0]][$$_[1]]) = ($$a[$$_[0]][$$_[1]], $$a[$$_[1]][$$_[0]]) for grep {$$_[1] > $$_[0]} map {[$_ / @$a, $_ % @$a]} 0..@$a**2-1}
   

3. Python.

   I have published this Python module: Vectors In Two Dimensions. I mentor new programmers in Python programming on Codementor using my gigabit Internet connection. One of my mentees recently won a university scholarship as a result of our Python pair programming procedure.

4. Postgres.

   I created this github repository to demonstrate various ways of connecting to pgdb . I have written lots of SQL for pgdb, DB2 and MySql.

5. Back-end applications programming.

   I have programmed in Java, Python, Perl, JavaScript on Amazon Web Services since 2010: As an example: this document contains Buttons to reverse the order of its sections and the experience sections can be dragged into a different order.

6. Highly available product systems

   I worked as a database administrator at Transamerica managing their online payment and accounting system systems running on IBM System 390 for 5 years.

7. Automated testing (unit, functional etc.)

   I have published 57 Perl modules on CPAN each of which makes extensive use of automated testing. These modules are also present on GitHub where they are tested using a GitHub Action.

8. Knowledge of Linux/Unix

   I use Kubuntu on my local systems and Ubuntu when on Amazon Web Services - the ability to move work to and from identical local and remote server operating systems is conducive to getting work done with dispatch.

9. Parsing text.

   I wrote Data::Edit::Xml to parse the Xml in all of the 1719 manuals written by Hewlett Packard Enterprise describing their operations so that I could convert them from DocBook Xml to Dita Xml as noted above.

10. Payment gateways API implementation

    I recently set up a payment gateway which connects to the New Jersey Department of Agriculture to allow vets to pay bills via credit cards.

11. Geometry: The construction of the pentagon

    Created this Perl program available on cpan to construct the pentagon in green:

    

    Created Math::Algebra::Symbols and used it to produce confirm the proof of various theorems in Conic Sections and to compute a formula for the area of a triangle from the length of its sides:

     1/2*$C * sqrt(1/2*$A**2 + 1/2*$A**2*$B**2/$C**2 + 1/2*$B**2 - 1/4*$C**2 - 1/4*$A**4/$C**2 - 1/4*$B**4/$C**2);
    
     is_deeply area(3,4,5),      6 ; # ok 1
     is_deeply area(2,2,2), sqrt(3); # ok 2
    

    using propositions derived from this sketch as shown in this Perl program.

    G. H. Hardy said: Beauty is the first test: There is no permanent place in this world for ugly mathematics. But as the above example clearly shows: a formula produced by a computer can be useful but ugly, or, as Enzo Ferrari said to Lee Ioacocca: Torna a la sub fabrica bruta a fare le sue automobile brute.

    Finally proved the derivation of the vector dot and cross products in two dimensions:

    

    A cross B is B dot C where C is obtained by rotating A by a 1/4 turn.

    

    The above theorems are based on The Theorem of Pythagoras .