Javascript Programmers and Developers

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Igor K.

Igor K.

Web Developer (PHP, MySQL, HTML, JavaScript)

Macedonia - Tests: 10

I am a professional web developer working on web applications of all kinds of PHP, MySQL, Javascript, Apache, HTML and CSS in agile manner. Quick-learner, talented, enthusiastic about exploring innovations, new technologies, scientific methods, best-practices and high performance scalable systems. I am always seeking opportunities to expand my knowledge and challenge myself. I am comfortable working with other developers and designers and have a proven history of successful bug fixing and trouble shooting tasks. I have a profound ability to work in a fast-paced environment and enjoy the adrenalin. Skills I bring to the table: - PHP/MySQL, - HTML/CSS, - JavaScript, Apache, SVN, jQuery, JSON, XML, - CMS, Wordpress, Joomla.

$15.00 /hr
104 hours

Yury Pliashkou

Yury Pliashkou Agency Contractor

CTO, Lead Web Engineer (PHP, Node, Ruby, JavaScript)

Belarus - Tests: 7 - Portfolio: 3

Hello, My name is Yury, I'm available online 16 hrs a day. Location: Belarus (Eastern Europe) GMT +3 Technologies: PHP stack : Symfony 2, Silex, Sylius, Bolt CMS, Symfony CMF, Zend Framework 1-2, Joomla 2-3 Javascript stack: jQuery, Angular, Bacon, jQuery mobile, Backbone, Underscore; DB: Doctrine ORM, MySQL, MongoDB, Memcached, PostgreSQL, SQLite Services: REST, SOAP, JSON APIs: Facebook, VK, Google, Tumblr, Twitter, SMS gates Search: Sphinx, ElasticSearch Caching: HTTP, file, Varnish Etc.: Highload optimization Spoken English, Polish, Russian, Belarusian

Associated with: IdeaSoft

100% Job Success
$45.00 /hr
2,649 hours

Evgenii P.

Evgenii P.

FullStack Ruby on Rails / Ruby and React.JS Senior Developer

Russia - Tests: 5 - Portfolio: 6

I'm the one of the TOP 10% Upwork Ruby, Ruby on Rails and JavaScript developers. My programming experience is more than 6 years. 4 years of Ruby/ Ruby on Rails / JS development and 2 years of React.JS development. I'm the one of a few developers who can jump in to any phase of project life cycle with full efficiency. I can work with big team or be independent developer. I can grant you that your project will be successfully finished to production stage without unexpectable situations. I can develop wide range of applications, modules, services and web applications in Ruby on Rails / Ruby / React.JS. My code is always clean, high-quality and easy-to-support. I use TDD to be sure that my apps stable and can be refactored or extended. So, my apps are dependable and pretty easy to extend with any new and unexpected functionality. My strong points are my Dependable, Creativeness and Punctuality. My #1 goal will always be to meet your needs and deadline. When I'm working on a new project, I like to speak with the client, so, that I can have a clear understanding of his/her needs and vision of the project. I'm honest and fair. Thank you in advance for your time and consideration. I look forward to working with you soon. Please take a look on my professional skill above and on my portfolio. Technologies - Ruby (1.9.x / 2.x), ruby ​​on rails (3.x / 4.x), Sinatra - Javascript / CoffeeScript / ES6 (jQuery, Lodash, React + Flux, BackboneJS, MarionetteJS, a bit of AngularJS) - Tests: RSpec, Minitest, jest - SQL (PostgreSQL, MySQL, SQLite) - Twitter Bootstrap, MaterialUI - preferably Git (+GitFlow), also CVS, SVN. Knowledge/Skills - OOP, MVC, SOLID, GRASP - High performance, quick learner - When writing code, I use Agile methodology, TDD, BDD, DDD. - scope of work estimation and timing, delivering the work on time without further reminders - refactoring and clean code writing Software stack - Linux (Ubuntu/Debian), packages installation/configuration - Remote work on servers via SSH connect - for developement I use Vagrant with Linux-based system as close to real production server as possible - Unix shell (ZSH/Bash, Vim, Tmux) to work with Ruby and JS, Git - Bundler, Rake for development on Rails - Npm, Grunt, Bower, Yoman, Gulp, WebPack for JS development Experience - Creating, modifying and integrating API (REST JSON) - Micro Service Architecture - embedding full-text search with ElasticSearch and Sphinx - websites parsing, Mechanize + Nokogiri - writing from scratch - improving gems - Sideckiq, Redis for background data processing - Unicorn/Puma/Rainbows for Rails server - pub/sub messaging with Faye and - environment deployment and DevOps using Ansible - Nginx customization - deploying with Capistrano - Travis-CI / Jenkins-CI for continuous integration - catching errors with Airbrake and automatic sending to Errbit - Redmine, Trello for project management

100% Job Success
$38.89 /hr
673 hours

Daniel Z.

Daniel Z.

Highly skilled API integrator, PHP (ZF) Coder and Project Manager

Poland - Tests: 7 - Portfolio: 6

Goal: Project and develop high quality apps for your success. Profile: OOPHP & Zend coding, IT consulting and business analyst, project coordinator and manager, Other skills: Apache, Bind, SSH, bashscripting, Memcached, Github, Solaris, Oracle, MySQL, Radius, AD, expert knowlegde of many *ux and windows systems Advantage: Project and implementation of many web apps. Most of it projected and developed by myself using Zend Framework, Google API (youtube, gdata), social API (twitter, facebook). Some of it integrated with operating systems or AAA software (radius, ldap). Usually Design Patterns were used (like Template Method, Version of Control, DAO, Dependency Injection, Decorator and so on). Some application built upon a structure of web services (XML, REST, JSON), some using jQuery and AJAX. Tools and technologies: Apache, radius, bind, ldap, Zend Framework, XML, SOAP, Linux, Linux daemons, Memcached, Sockets, REST, JSON, Oracle, MSSQL, MySQL, Design patterns, MVC, SVN, BASH, PHPUnit, Xdebug, Unit testing, Google Youtube API, Google Gdata API, Google Maps API, Facebook API, PayU API

100% Job Success
$35.00 /hr
1,935 hours

Petr Brazdil

Petr Brazdil

Lead Software Engineer

Czech Republic - Tests: 6 - Portfolio: 3

My purpose: INNOVATE. Deliver QUALITY. Build long-term TRUST. Email: p.brazdil[at] I am looking for long-term relationships ONLY. Don't contact me for short term jobs. If you looking for a strong professional with creative mind who could build high load, scalable systems, based on modern technologies, then I'm perfect candidate for you. I also do consulting for small to medium companies and startups about IT, Project Management, Leadership, and even Business related stuff. My skill set: 1) JavaScript (especially TypeScript), Go, Ruby, Java, HTML5, C / C++ / C# (Mono), SQL, PHP, Bash, Haskell, Objective-C 2) NoSQL databases like MongoDB, Redis, CouchDB, Cassandra 3) SQL databases: MySQL, MariaDB, PostgreSQL 4) Software Architecture and design - Class diagrams, Use-cases, Activity diagrams, ERD diagrams, knowledge of object oriented design patterns (GoF and others) 5) Project manager - experience with advanced planning techniques so as with leadership 6) Experienced with developing complex web applications (backend—especially REST or BaaS, frontend—even JavaScript-heavy - Flux / ReactJS), real-time applications, desktop applications (Spring and MSVC C#) and even mobile game. 7) Open-minded, great leadership skills, highly organized, ability to realistically suggest deadlines, result-oriented 8) Mentoring, code reviews and consulting 9) Cloud based development and deployment (OpenShift Origin and Enterprise, Heroku, CloudFoundry, Amazon Cloud) 10) Experience with many frameworks, including: Express, Ruby on Rails, Sinatra, Beego, AngularJS, UnderscoreJS, BackboneJS, MarionetteJS, Node.js, Beego, Martini, Spring, Xamarin, Marmalade and many more... For me - good architecture and total high quality and efficiency is MUST. My code will SAVE YOUR MONEY during future maintenance. I finished more than 15 projects from start to end, including maintenance phase. I really know how to make software successful and what is that mean: getting things done. How to breath life in software. One of my recommendation on Linkedin which describes me perfectly: "Peter is a experienced IT professional, technically sound with the ability to liaise and negotiate with managers at all levels. Excellent interpersonal skills, performing well under pressure. Organized and flexible with productive time management. I've been working with Peter for more than 1 year and he is the best professional I've ever met, his ideas surprise me every day. Best thing on Peter is that I can truly rely on him in every situation."

100% Job Success
$80.00 /hr
1,749 hours

Pavlov P.

Pavlov P.

Senior Mobile Developer

Russia - Tests: 9 - Portfolio: 18

Hello Client want your GREAT App. I am a talented mobile Expert can work full time for you. I have a strong background in the areas of iPhone and Android having worked with them for many years for many clients and companies around the world. I have expertise in both native languages and hybrid apps. I am experienced in building complex GPS based apps, OpenGL applications, image processing and client server applications. I am ready to start work on your jobs today. - My Skill ★★★ iOS Software Engineer working with iOS 7 SDK, Objective-C, SWIFT, Cocoa Touch, UIKit, Back end, PhoneGap, Xcode, Interface Builder, Instruments, and Git on a daily basis. ★★★ GPS based apps, OpenGL applications, image processing and client server applications. ★★★ iBeacon, Bitcoin and new ios SDKS i have master. ★★★ Cocos2D, Corona and Unity 3D is my tools for development mobile Games. ★★★ 5+ years of proven success in exceeding client expectations as a full-time independent contractor. 3+ years experience focusing exclusively on native iOS development. ★★★ At Android and Blackberry programming have rich experiment and great skill. ★★★ Continuously focused on providing an excellent user experience via clean, maintainable, performance code. ★★★ Professional, personable, and flexible while working to achieve objectives. ✔ Technical specifications Mobile: Objective C, Cocoa 2D, Sprite Kit, Unity 2D, Unity 3D, Java SDK, Phonegap Back-end Web Development: PHP, .Net Front-end Web Development: Ajax, javascript, jQuery, HTML5, CSS3 Databases: MySQL, SQLite, MS SQL Operating Systems: Windows, Linux, Unix, Mac OS Administration/Hosting Platforms: Apache, Tomcat, IIS My mission is to maintain long-term relationship with a customer, not only leading it from primary contacts to final delivery and product support, but also providing a fundamental base for continuous cooperation. My strategy is based on the notions of return of investment (R.O.I) policy which has demonstrated its huge potential. I will achieve ultimately the best expected result for the most demanding start-ups and businesses around the world. Good Luck!

100% Job Success
$49.00 /hr
2,027 hours

Konstantinos Paraskevopoulos

Konstantinos Paraskevopoulos Agency Contractor

vTiger CRM ERP Expert

Greece - Tests: 1

I am an Internet Technologies and Software engineer, specializing in Vtiger CRM / ERP planning, development and implementation. My 8 years experience in Internet Technologies and 5 years focusing on vtiger allows me to implement any vtiger customization. I have implemented various integration projects of vtiger with 3rd party applications using WebServices, such as Joomla, Jomres, Wordpress, Virtuemart, OsCommerce and more. The strong background on business process re-engineering and business process integration allows me to easily understand the business needs on their CRM / ERP application to ensure the customization success. In the past 5 years i have worked with various companies in different industries around the world to help the design and the implementation of their CRM / ERP systems. Integrating their individual business processes to the vtiger platfrom, i have developed many modules for vtiger in order to "digitilize" companies specific processes and workflows to Vtiger platform. My philosophy for CRM / ERP systems is summarized in the following principle: "You cannot manage something that is not measurable". Towards this principle i assist my clients develop a system where they can track down all the information flow produced by their business processes and also the tools to streamline them, providing all the necessary information (BI) to the right department / user. I enjoy helping companies create their own tailor-made software that reflects their real needs, allowing the business to effectively utilize their resources and automate trivial processes thus saving time and money, that they can invest in growth (that is after all what software can provide time / money).

Associated with: Target Integration Ltd. Agency

95% Job Success
$100.00 /hr
284 hours

Jarek Zmudzinski

Jarek Zmudzinski Agency Contractor

Full stack web developer, Team leader

Poland - Tests: 8 - Portfolio: 13

Currently Software Development Manager in Allegro Group focusing on the subject of Big Data. I am a full stack web developer capable of delivering whole web applications from engine to layout, with over 12 years of experience in writing web applications and websites. During this time I've worked remotely full time for companies in New York (2 years) and in France (6 months).I tend to see myself as Software Engineer choosing technology appropriate to task at hand. I code primarily in Ruby and Ruby on Rails, and more recently I've jumped on a band wagon of Meteor.js popularity. These technologies allow me to deliver whole applications in no time. Since I've heard about genetic algorithms almost 20 years ago, I tried to focus on some machine learning problems, lately testing my skills on Kaggle platform and completing part of Data Science track on Coursera. I am perpetually trying to use these skills in my current job, proposing data science solutions that could transform some of our products and procedures, from Financial Accounting, through Managerial Accounting, down to the core of our IT products. Some of my proudest accomplishments are: - Single handedly writing fully functional Groupon clone -, from layout, through Ruby on Rails engine, up to scalable deployment in the cloud. The whole app had been completed within 3 weeks. - I have developed a Ruby on Rails CMS, as my pet project, which serves all webpages I have created for various customers throughout years - Over 20 minimalistic webpages, served by above mentioned CMS, beautifully designed by MINIMA agency. - Coauthored huge Ruby on Rails CRM application, working remotely for New York based company Direct Interactive - Ruby on Rails engine of Trzymajtempo social sport site ( - Played major role in a few more RoR applications. Fluent English speaker, proven by Certificate of Proficiency in English. Specialties: Ruby, Ruby on Rails, Meteor, Cloud, SOA, HTML, CSS, JavaScript, usability, team management, agile methodologies, scrum, Mac OS, Linux

Associated with: Toro Negro

$50.00 /hr
50 hours

Gregory Funtusov

Gregory Funtusov

Passionate Ember.js developer and Machine Learning architect

Russia - Tests: 7 - Portfolio: 3

I love building smart computer systems that solve people problems. I have a background in developing machine learning solutions to real problems and creating complex front end applications with ember.js. This is my strength: seeing the whole picture, never saying "that's impossible!", knowing how to perform magic deep down the back end and display the results to a user in an easy and accessible way.

Groups: Engine Yard Ruby on Rails Professionals Network, MailChimp Experts Group...

100% Job Success
$60.00 /hr
6,301 hours