Rails Freelancers

Clear all filters

Sean O.

Sean O.

Ruby on Rails and JavaScript Web Developer

United States - Tests: 2 - Portfolio: 2

Hello, my name is Sean, I'm a full-stack Ruby on Rails and JavaScript web developer. I have over ten years of professional experience. My focus is on sustainable web application architecture with Ruby on Rails, Ember.js, Backbone.js, jQuery and responsive HTML/CSS. My skills include: Ruby, Ruby on Rails, Sinatra, RSpec JavaScript, jQuery, Ember.js, Backbone.js, Jasmine PHP, Wordpress SQL [MySQL, PostgreSQL, SQLite] HTML/5, CSS/3, Sass, Responsive Design Linux, Apache, nginx, Heroku, Vagrant Git, GitHub, Bitbucket

$83.33 /hr
156 hours

K. M. Rakibul Islam

K. M. Rakibul Islam Agency Contractor

Senior Ruby on Rails Developer

Canada - Tests: 5 - Portfolio: 3

I am a passionate Software Engineer and Web Developer, currently working at Quandl Inc, Toronto, Canada. Here we build intelligent search engine for numerical time series data. I work massively with Ruby at Quandl and Rails is the framework that I use here. Also, I use JavaScript, CoffeeScript and jQuery for front-end development. I love to write clean tested code. Prior to joining Quandl, I have worked as a Software Engineer (R&D) at KONA Software Lab which is a South Korean Software Lab. There, I worked on Smart Card Management System and implemented Secure Communication Protocol for smart cards using Java. I also researched on and worked with Web Services Security and Java Web Services. I gained my Bachelor Degree in Computer Science and Engineering with Distinction (Honors) from Bangladesh University of Engineering and Technology (BUET) which is the best engineering university of Bangladesh. Now, I am studying Masters in Computer Engineering at University of Toronto. I am a technology independent developer having solid understanding of Object Oriented Design, Database Systems Design, Algorithms and Data Structures. I can learn and adapt to any new technologies and systems very quickly. As well, I am very hard working in nature and always love to work hard to get things done. I am a friendly and positive team player too. Specialties: → Algorithms, Software Engineering, Software as a Service (SaaS), Test Driven Development (TDD), Web Development, Object-Oriented Analysis and Design, RDBMS, Genetic Algorithms, Evolutionary Algorithms. → Ruby, Ruby on Rails, Core Java, JavaScript, CoffeScript, jQuery, Ajax, Haml, Sass,Twitter Bootstrap, Github, Heroku, Objective C, C, C++, UNIX Shell Programming. → RSpec, Cucumber, Rails Web Services, RESTful Architecture, Apache CXF, SOAP, WSDL, WS-Security, Open GL, XML, XSD, SDMX, XPath, Nokogiri, XQuery, YQL, JSON, AWS Elastic Beanstalk. → SQL, SQLite, PostgreSQL, MySQL. → Open Source enthusiast.

Groups: SocialEngine

Associated with: BrainLinks Soft

$33.33 /hr
0 hours

Corey Woodcox

Corey Woodcox

Ruby and Rails Developer, API Designer

United States - Tests: 6

I create speedy JSON APIs for iOS, Android, and browser apps, as well as for other developers. I'm looking to work more on iOS applications, and build some experience writing Objective-C and Swift. I'm a native speaker of English, and currently considering any opportunity that presents itself. Please don't hesitate to contact me if you have a project that can utilize my skills!

$80.00 /hr
231 hours

Zack Dinerstein

Zack Dinerstein

Frontend Web Developer w/ Rails Experience

United States

I'm a frontend developer looking to help you build a beautiful site. I'm specifically focused on finding exciting work in the publishing and media world. I've worked on projects for GQ Magazine, Glamour Magazine, and HarperCollins Publishing. I have a experience working in Ruby on Rails, Backbone.js, D3.js, Bootstrap, LESS, & postgreSQL.

$50.00 /hr
150 hours

Harold R.

Harold R.

Web Application Developer

United States - Tests: 2 - Portfolio: 14

"Harold really cares about the projects he engages in and it shows through his passion and dedication. Harold is the type of person you wish you had permanently on your team." "Outstanding work again from Harold. He will be our go-to person for web programming for our Hubspot COS going forward." "Harold is fantastic to work with. He is a great developer, has great interpersonal skills, and is able to communicate difficult concepts into easy to understand terms." I'm Harold, and I develop web applications. The quotes above are directly from my Upwork feedback. Feedback like this is typical as I blow past project requirements. I'm pricier per hour than other contractors, but you'll find I end up saving you money in the long run. I get things done the right way, and I'm extremely good at realizing new features with maintainable code with a quick turnaround time. My native language is English. I'm also fluent in Spanish, Italian, Portuguese, and basic French. I live in Boston, MA. Drop me a line on Upwork; I'd love to provide free insight into what you're working on!

100% Job Success
$235.00 /hr
584 hours

Eric Eskildsen

Eric Eskildsen

Software Engineer Specializing in Web Technologies

United States - Tests: 2 - Portfolio: 3

Writing great software is my passion. My current toolkit includes: - C#, ASP.NET MVC, Web API, SQL Server - JavaScript, jQuery, AngularJS - PHP, Slim, Yii, Yii2, MySQL Experience as a developer as well as my current software analyst role with Kellogg Company has helped give me a big-picture perspective on software and systems. Along with practical experience, I have a Bachelor of Information Technology and Security from Baker College.

$79.80 /hr
108 hours

Tuan Ho

Tuan Ho

PhD - AI Algorithm - DSP - Neural - Fuzzy - Genetic - Machine Learning

United States - Tests: 1 - Portfolio: 8

Research, Engineering, and/or Consulting in Advanced Signal/Image Processing, Artificial Intelligence, Ontology Expert Systems, Pattern Recognition, Robotic/Computer Vision, Data Mining, Knowledge Discovery, Algorithms Development, Quantitative Financial Analytics Engineering, Machine Learning, Biometrics Security System Design, Quant Modeling, Adaptive Controls, RF Communications, Radars, Genetic Annealing Simplex Algorithms, Avionics, Predictive Analytics, Multi-Agent Complex Adaptive Systems, and Defense Systems Engineering.

87% Job Success
$150.00 /hr
1,347 hours

Matthew Davids

Matthew Davids

Software Architect

United States - Tests: 3

Self taught software architect, devops, automation, and infrastructure guy. Entry level to project lead/architect in 11 months. Wanted more challenge, variety, control, and flexibility, so I left to consult. Core skills lie in the DevOps domain: infrastructure design, resiliency and failover, scaling, monitoring and analysis, deployment automation, configuration management, service discovery, and system administration. Capable of full cloud implementations from project/problem analysis and planning to network layout to OS to stack to application to configuration, management, debug, instrumentation, and troubleshooting. Additional experience with JS build systems, Single Page Applications in JS/CS, 3D graphics and visualization; attempting to expand into algorithm design for both individual and distributed systems, monitoring and performance analysis/optimization for distributed systems, and additional work in application development. Communicates well, understands the value of documentation, and integrates well into any existing team. Available for consulting work on short term (less than 2 month) basis for the time being; normal availability resumes in December. Current toolset/skillset: - AWS Cloudformation - AWS EC2, S3, VPC, IAM, ELB, etc - Riemann, Clojure, Graphite - ELK stack - Packer, Vagrant - Airbnb SmartStack (Nerve, Synapse, Zookeeper) - Ruby, Rails (instrumentation, mostly) - Sidekiq - MongoDB - Ansible, Chef - Redis (standalone with sentinel or as part of Elasticache) - Memcached (Elasticache) - Papertrail, Cloudwatch - Sentry - NewRelic - rsyslog - Node.js - JavaScript, Coffeescript - Bash, sysadmin - Nginx, Tomcat Probably some other things as well... Assorted personal projects with: - D3.js, THREE.js - AWS - Lua / fold.it - Algorithm design and analysis

100% Job Success
$60.00 /hr
2,006 hours

Daniel Spyralatos

Daniel Spyralatos Agency Contractor

Social Media Marketer

United States - Tests: 48 - Portfolio: 4

Hello! My name is Daniel Spyralatos. I am currently studying overseas in Greece. My father is Greek-American so I am fluent in both Greek and English. I am studying Physical Therapy in Lamia. I also have degrees in music. I have been working on Social Media for a very long time, thus I am quite experienced. I am a hard working guy, with passion in Social Media Marketing and willing to get your job done with good results and on time. I am currently involved with the Social Media Marketing company "Greek Geeks". My objective is to fulfill your needs and your business expectations. I am looking forward to both hearing and working with you.

Associated with: GREEK GEEKS

96% Job Success
$35.56 /hr
695 hours