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@omederos
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Oscar Mederos

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---------------------------- Areas of Expertise ---------------------------- * Microsoft Windows (2000, XP, Vista, 7, and previous versions) * Linux (Debian, Ubuntu, Gentoo, RedHat, Fedora,...) * Mac OS * ---------------------------- Developing Skills ---------------------------- * Years of experience working in .NET (C#, VB, F#) * WPF and Silverlight * Non-graphical applications in Python * Experience developing Win32 native applications (subclassing, hooks, everything), and using Win32 API from other languages like C# * Developing skills in C/C++ (both UNIX and Windows systems) * Developing skills in Python, Java, Ruby, Perl, Awk,... * Developing skills scripting in shell (Awk, Sed, egrep, Ruby, Perl, Python,...) * MATLAB * Object Oriented programming (OOP) * Ranking reports for a list of keywords & search engines (including the application) * Automatization Softwares (softwares which do 'clicks' for you, specially on websites) * Software to create multiple accounts on websites * Submit information to several websites * ...any task you want to automate on Internet... * Geocoding programatically - Working with ZIP codes - Latitudes & Longitudes - Representing addresses/cities in maps - ... * Data Entry - Excel - Website frameworks (submitting products to shops, etc.) - CSV - Databases - Web pages * Finding Places/Business all around the world * Modeling databases: - ORMs - Entity Framework - LINQ to SQL - NHibernate - MS SQL Server (Express, Compact Edition,...) - MySQL - SQLite - PostgreSQL - MS Access - ... * Regular expressions * Multithreaded applications * Version control systems (Git, Mercurial, SVN) ---------------------------- Scrapers/Crawlers ---------------------------- * Crawling/Scraping/Parsing info from websites which: - Don't provide APIs - Requires decaptching, using online decaptching services like: * ($2 per 1000 recognized captchas) * (Even cheaper) * (A little more expensive) - Are classical HTML websits that can be accessed directly and see the code without problems> - Requires using other methods (POST,..) instead of GET to retrieve the information - Show the data dynamically using JavaScript, AJAX,... - Requires signing in before navigating & managing cookies Some of those sites are: - Google Products () - - - - (Amazon Products Price Tracking) - (Sports Betting -> Horse racing, Football, Boxing,...) - - - <font color="#404040" size="1"></font> - - - - Australia restaurants: * * * ... - Real Estate websites: * * * * - - - - - - - - ...see my ratings & finished projects and you'll see many others... ---------------------------- Web development Frameworks & CMS ---------------------------- * Django * Drupal (v6 & v7) * Symfony * ---------------------------- APIs ---------------------------- * Decaptcher * BypassCaptcha * DeathByCaptcha * Yahoo * Bing * Google * Flickr * Twitter * Oodle * Facebook * LinkedIn * Any other website that provides an API ---------------------------- Good practices in software engineering, team programming and software development in general ---------------------------- * Design patterns knowledge * SOLID Principle * Designing applications (both architecture & software design), mainly using an Agile strategy * Writing good source code (modular, orthogonal,...), taking in count the principles: * DRY: Don't Repeat Yourself * DIE: Duplication Is Evil * YAGNI: You Ain't Gonna Need It * Test Driven Development (TTD) experience * Deliver almost all my applications with the corresponding unit tests * Follower of the Agile (XP, Scrum,...) principles (fast delivers,...) ---------------------------- Data Structures ---------------------------- * Binary search trees * AVL Tree (Balanced binary search tree) * Red-Black Tree (Balanced binary search tree) * B-Tree * B+Tree * Disjoint Sets * Graphs * Directed/Undirected graphs * Multigraphs * Supergraphs * Classical data structures (LinkedList, Stacks, Queues,...) implemented from scratch ---------------------------- Efficient Algorithms ---------------------------- * String matching (Knuth-Morris-Pratt) * Main graphs algorithms: - Prim - Kruskal - Floyd-Warshald - Dijkstra - Bellman-Ford - Dag-Shortest-Path * Finding paths - Minimum - Cheaper - ... * Searching algorithms * Sorting * Divide & Conquer strategy algorithms * Greedy algorithms * Dynamical algorithms * NP algorithms * Transformation between problems * Backtrack algorithms * Any kind of algorithms in general to solve an specific computer problem ---------------------------- Theory ---------------------------- * NP-Completness * Discretes mathematics * Number theory * Group Theory * Combinatory * Primitive Recursive functions * Turing machines * Graphs theory (which demonstrates that **lots** of algorithms work) * Proving correctness and complexity of algorithms * Proving lower bounds of algorithms * Automatas Theory & Languages (for compilers): - Attributed grammars - Grammars - Regulars, Context free, etc. - LL(k), SLR, LR, LALR, ... - Regular expressions - Code generation - Automatas * Finites (Deterministic/Non-Deterministic) * Stack ---------------------------- Some of real/academic problems I've solved/developed are: ---------------------------- * Implementation of a shell using C from scratch (input and output redirections, pipes, ...) * Implementation (with FUSE) of an Ext2 filesystem, using both C and Python under GNU/Linux. * Scripts for solving particular problems, using Awk, Sed, Perl and Bash. |
$10 USD/hr
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5.1
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Software Developer

Dec 2010

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