Juan Roldan

$35/hr
Ruby on Rails Developer
Reply rate:
-
Availability:
Full-time (40 hrs/wk)
Location:
San Miguel de Tucuman, Tucuman, Argentina
Experience:
7 years
​ ​ ​ ​ ​Juan​ ​Roldán Software​ ​Engineer​ ​▪​ ​Technical​ ​Delivery​ ​Manager Certified​ ​ScrumMaster​ ​(CSM) Date​ ​of​ ​birth:​ ​ ​ ​ ​ ​April​ ​30th​ ​-​ ​1989 Nationality:​ ​ ​ ​ ​ ​ ​ ​ ​Argentine Marital​ ​Status:​ ​ ​Single Mobile:​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​+54​ ​9​ ​381​ ​-- Engineer, Rails Developer, Technical Recruiter and Certified Scrum Master with +5 years of experience, in permanent​ ​research​ ​and​ ​progress​ ​with​ ​great​ ​experience​ ​on​ ​both​ ​technical​ ​and​ ​management​ ​sides. Results-oriented​ ​with​ ​a​ ​delivery​ ​focus​ ​and​ ​really​ ​skilled​ ​working​ ​on​ ​big​ ​and​ ​small​ ​groups. Always available to meet clients, analyze requirements, offer improvements and solutions, plan, schedule, organize projects, design, code, test application features, synchronize efforts, meet deadlines and communicate​ ​ideas​ ​effectively​ ​to​ ​technical​ ​and​ ​non-technical​ ​folks​ ​alike. Passionate​ ​for​ ​simple​ ​solutions​ ​to​ ​complex​ ​problems. Personal​ ​quote:​ ​"To​ ​get​ ​something​ ​you​ ​never​ ​had,​ ​you​ ​have​ ​to​ ​do​ ​something​ ​you​ ​never​ ​did". Professional​ ​Experience DriverReach​ ​-​ ​United​ ​States​ ​Startup www.driverreach.com Ruby​ ​on​ ​Rails​ ​Developer​ ​|​ ​Remote​ ​work Aug​ ​2016​ ​-​ ​Present ➢ His work here includes time and risks estimations, frontend/backend integration tasks, tests writing and backend refactors.​ ​Developments​ ​coordinated​ ​through​ ​Skype,​ ​GoogleHangout​ ​and​ ​Slack​ ​services. ➢ Analytics implementations from scratch through SegmentIO (Google Analytics & Intercom). Tracking 14 different events​ ​within​ ​the​ ​platform:​ ​registration​ ​steps,​ ​purchases,​ ​accepting​ ​driver​ ​applications,​ ​sending​ ​messages​ ​and​ ​more. ➢ Signup process improved by providing insights to Drivers before accessing the platform: # of matching companies based​ ​on​ ​location,​ ​license​ ​class,​ ​years​ ​of​ ​experience​ ​and​ ​job​ ​type​ ​preferences​ ​(part-time,​ ​full-time). ➢ SMS communication between recruiters and drivers improved: recruiters can directly contact drivers. Also the platform​ ​provides​ ​automatic​ ​responses​ ​to​ ​drivers​ ​sending​ ​SMS​ ​messages​ ​to​ ​companies. ➢ Drivers signup process improved by reducing the # of steps required, re-arranging questions, setting less but more efficient​ ​requirements​ ​leading​ ​to​ ​an​ ​increase​ ​on​ ​successful​ ​signups​ ​(UX​ ​&​ ​BE​ ​work​ ​provided). ➢ CRM developed for recruiters to improve communication with drivers, handle meetings and any missing requirements, ensuring each driver a successful application to trucking companies across United States. Recruiters can​ ​now​ ​keep​ ​track​ ​of​ ​each​ ​driver's​ ​progress​ ​on​ ​a​ ​daily​ ​basis. ➢ Technologies involved on this platform​: MySQL, Rspec/FactoryGirl/Capybara (TDD frameworks), Amazon S3 API (image storage), Omniauth (social integration), Devise (Signup/Login workflows), WickedPDF (PDF’s files generation for​ ​on-demand​ ​user’s​ ​queries​ ​and​ ​emails​ ​attachments)​ ​and​ ​Twilio​ ​API​ ​(SMS​ ​messages). OraHQ​ ​-​ ​New​ ​Zealand​ ​Startup www.orahq.com Ember​ ​JS​ ​/​ ​Ruby​ ​on​ ​Rails​ ​Developer​ ​|​ ​Onsite​ ​work Jan​ ​2016​ ​–​ ​Aug​ ​2016 ➢ His daily work included technical guidance, leadership on every step of maintenance/development of an online platform, analysis and troubleshooting of long time functionalities (2 years old and more), performing frontend/backend code refactoring, transforming ideas coming from Marketing/Product teams into new functionalities​ ​for​ ​the​ ​Ora​ ​App. ➢ Successfully in charge for 8 months of developing new functionalities related to the billing area of the Admin section, performing database performance improvements and testings, generating PDF orders via background jobs, re-balancing the work each background queue is taking care of and providing new interfaces for Admin users to generate​ ​weekly​ ​reports​ ​in​ ​a​ ​much​ ​faster​ ​and​ ​logical​ ​way. ➢ He managed to setup the first caching implementation within the platform that increased general performance, drastically​ ​reduced​ ​daily​ ​API​ ​calls​ ​to​ ​Google​ ​Analytics​ ​and​ ​led​ ​the​ ​way​ ​to​ ​future​ ​implementations​ ​in​ ​other​ ​sections. ➢ Performed​ ​lightning​ ​talks​ ​for​ ​colleagues​ ​regarding​ ​MVC​ ​Patterns,​ ​Agile​ ​Techniques​ ​and​ ​Caching​ ​implementations. ➢ Technologies involved on this platform​: MySQL, Rspec/FactoryGirl/Capybara (TDD frameworks), Amazon S3 API (image storage), Omniauth (social integration), Devise (Signup/Login workflows), I18n (internationalization features), Google Speed & Insights API, EmberJS (JS Framework) and WickedPDF (PDF’s files generation for on-demand user’s queries​ ​and​ ​emails​ ​attachments). AREA​ ​17​ ​-​ ​France www.area17.com Ruby​ ​on​ ​Rails​ ​Developer​ ​&​ ​Project​ ​Manager​ ​|​ ​Remote​ ​work May​ ​2014​ ​–​ ​Jan​ ​2016 ➢ His daily work on this company included analysis and troubleshooting of long-time functionalities (2 years old and more), performing frontend/backend code refactors, handling platform migration process (both Ruby and Rails) and achieving a considerable performance improvement, transitioning from Google Analytics into SegmentIO/Intercom third-party​ ​tools. ➢ He’s also led a 5 members team on project ​“Dering Hall”​, distributed around 3 countries: United States, Argentina and France, into a project’s full redesign (both frontend and backend sides), DB data migration, cleaning up code sessions, integrating new modules and pages, delivering an entire new site in a period of 8 months with successfully weekly​ ​deploys​ ​and​ ​live​ ​demos​ ​shared​ ​with​ ​the​ ​client.​ ​Site:​ ​www.deringhall.com -➢ He’s participated on project ​“Krrb”, ​a web application that allow users to buy and sell articles of their own. A fun, friendly​ ​and​ ​safe​ ​place​ ​to​ ​connect​ ​with​ ​neighbors​ ​for​ ​local​ ​and​ ​in-person​ ​commerce.​ ​Site:​ w ​ ww.krrb.com ➢ The work on this project was mainly analysis and troubleshooting of long-time functionalities, performing frontend/backend​ ​code​ ​refactors​ ​and​ ​supporting​ ​the​ ​team​ ​during​ ​launches​ ​and​ ​hot​ ​fixing. ➢ Always coordinating efforts with colleagues from France and United States through Hipchat and Google Hangout services,​ ​followed​ ​by​ ​successfully​ ​weekly​ ​production​ ​deploys. ➢ Technologies involved on this platform​: MySQL and MongoDB (databases), Sphinx/ElasticSearch (search engines), Errbit (app exceptions management), Rspec/FactoryGirl/Capybara (TDD frameworks), Amazon S3 API (image storage), Omniauth (social integration), Devise (Signup/Login workflows), Braintree (handling subscription and daily payments),​ ​I18n​ ​(internationalization​ ​features)​ ​and​ ​Geokit​ ​(geolocalization​ ​features). ➢ Work's​ ​acknowledgements:​ ​http://opticalcortex.com/improving-user-experience-without-design/ StarterTables​ ​-​ ​Belgium​ ​Startup www.startertables.com Ruby​ ​on​ ​Rails​ ​Developer​ ​&​ ​Technical​ ​Delivery​ ​Manager​ ​|​ ​Remote​ ​work Jan​ ​2014​ ​–​ ​Jun​ ​2015 ➢ A web application focused on providing entrepreneurs with tools and future colleagues to start their own company, all​ ​at​ ​an​ ​affordable​ ​cost.​ ​This​ ​project​ ​is​ ​still​ ​in​ ​"beta"​ ​phase,​ ​currently​ ​being​ ​tested​ ​with​ ​a​ ​private​ ​community​ ​of​ ​users. ➢ His daily activities included coordination of a 4 members team distributed around 3 countries: Argentina, Brazil and Belgium;​ ​weekly​ ​updates​ ​to​ ​Product​ ​Owner​ ​and​ ​production​ ​deploys. ➢ It​ ​was​ ​his​ ​responsibility​ ​to: ○ ○ ○ Evaluate​ ​each​ ​requirement/feature/backlog-item​ ​from​ ​Product​ ​Owner. Determine​ ​frontend/backend​ ​needs​ ​to​ ​be​ ​built. Validate​ ​decisions​ ​beforehand​ ​with​ ​client​ ​on​ ​weekly​ ​meetings. ➢ Application​ ​delivered​ ​after​ ​18​ ​months​ ​of​ ​work​ ​while​ ​entered​ ​in​ ​private​ ​"beta"​ ​phase. ➢ Technologies involved on this platform: PostgreSQL (databases), ElasticSearch (search engine), Airbrake (app exceptions management), Rspec/FactoryGirl/Capybara (TDD frameworks), Omniauth (social integration), Devise (Signup/Login workflows), Braintree (handling subscription payments), PayPal API (handling services payments inside the platform), WickedPDF (PDF’s files generation for on-demand user’s queries and emails attachments), rQRcode (QR​ ​codes​ ​generation​ ​of​ ​tickets​ ​for​ ​events​ ​created​ ​through​ ​the​ ​platform). Globant​ ​-​ ​Argentina http://www.globant.com/ Ruby​ ​on​ ​Rails​ ​Developer​ ​&​ ​Technical​ ​Delivery​ ​Manager​ ​|​ ​Onsite​ ​work Aug​ ​2013​ ​–​ ​Apr​ ​2014 ➢ He led the development on project “​Nobleza Obliga”​, an argentinian crowdfunding web application focused on humanity​ ​causes​ ​for​ ​all​ ​Latin-America:​ ​www.noblezaobliga.com ➢ The work on this project included payments internalization through MercadoPago, implementation of Paypal API, successful​ ​production​ ​deploys​ ​for​ ​5​ ​months​ ​and​ ​live​ ​demos​ ​shared​ ​with​ ​client. ➢ Technologies involved on this platform: PostgreSQL (database), Backbone (modular JS code and rendering views), Airbrake (app exceptions management), Rspec/FactoryGirl/Capybara (TDD frameworks), Amazon S3 API (image storage), Omniauth (social integration), Devise (Signup/Login workflows), MercadoPago and PayPal APIs (Payment Gateways),​ ​I18n​ ​(Internationalization​ ​features)​ ​and​ ​Geokit​ ​(geolocalization​ ​features). ➢ Work's​ ​acknowledgements: http://www.globant.com/press-release/globant-works-noblezaobliga-expanding-its-crowdfund ing-platform-latin-america-0 -➢ He led the development on project ​“Tirana”​: a web application that manages enrollment campaigns for several colleges​ ​of​ ​United​ ​States:​ ​www.tiaa-cref.org/public/index.html ➢ Application built for “TIAA-CREF”, Fortune 100 financial services organization which is the leading retirement provider for​ ​people​ ​who​ ​work​ ​in​ ​the​ ​academic,​ ​research,​ ​medical​ ​and​ ​cultural​ ​fields​ ​on​ ​the​ ​United​ ​States. ➢ The work on this project included developing key filters in the UI, providing an improved enrollment system for 2014 with new validations, new UI features, consultant and delivery management steps, successful production deploys for 5​ ​months​ ​and​ ​live​ ​demos​ ​shared​ ​with​ ​client.​ ​Team​ ​size:​ ​3​ ​members. ➢ Technologies involved on this platform​: PostgreSQL (database), Backbone (modular JS code and rendering views), Errbit (app exceptions management), Rspec/FactoryGirl/Capybara (TDD frameworks), Devise (Signup/Login workflows),​ ​PDFKit​ ​(PDF​ ​generation​ ​features). -➢ He worked on project ​“Apartments”​: A web application that manages most of the renting apartments activity in United​ ​States:​ ​ ​www.apartments.com ➢ His work on this project included frontend/backend integration tasks, tests writing, backend refactors, pair-programming, live demonstrations of the application with clients, collaborating and coordinating efforts with a 14 developers​ ​team,​ ​providing​ ​successfully​ ​frontend​ ​and​ ​backend​ ​solutions​ ​sprint​ ​by​ ​sprint​ ​for​ ​6​ ​months. ➢ Technologies involved on this platform​: PostgreSQL (database), Backbone (modular JS code and rendering views), Airbrake (app exceptions management), Rspec/FactoryGirl/Capybara (TDD frameworks), Amazon S3 API (image storage),​ ​Devise​ ​(Signup/Login​ ​workflows),​ ​I18n​ ​(internationalization​ ​features)​ ​and​ ​Geokit​ ​(geolocalization​ ​features). Insignia​ ​-​ ​Argentina http://insignia4u.com/ Ruby​ ​on​ ​Rails​ ​Developer​ ​&​ ​Project​ ​Manager​ ​|​ ​Onsite​ ​work Jan​ ​2012​ ​–​ ​Aug​ ​2013 ➢ He was part of a 4 members team developing a platform called ​“TableHopping NY”​, web application that manages restaurants and tables allowing users to arrange meetings and owners to promote their places around New York: www.tablehopping.nyc ➢ He also worked within a 3 members team developing a platform called ​“BurdaStyle”​, web application oriented to fashion designers to showcase their work and products to clients and designers around the world: www.burdastyle.com ➢ His work on these projects included: time and risks estimations, frontend/backend integration tasks, tests writing, code refactors, coordinating efforts with developers from France and United States, organizing meetings with project managers​ ​for​ ​live​ ​demonstrations​ ​and​ ​successfully​ ​weekly​ ​production​ ​deploys. ➢ Technologies involved on these projects​: MySQL, PostgreSQL and MongoDB (databases), Backbone (modular JS code and rendering views), Airbrake/Errbit (app exceptions management), Rspec/FactoryGirl/Capybara (TDD frameworks), Amazon S3 API (image storage), Devise (Signup/Login workflows), Omniauth (social integration), I18n (internationalization​ ​features)​ ​and​ ​Geokit​ ​(geolocalization​ ​features). Education​ ​and​ ​Training Education:- Tucuman​ ​National​ ​University​ ​-​ ​Argentina:​ ​“BS​ ​in​ ​Computer​ ​Science” Technical​ ​Courses​ ​Completed:- Scrum​ ​Alliance Cambridge​ ​University “Certified​ ​Scrum​ ​Master” “Business​ ​English​ ​Certificate​ ​-​ ​Level​ ​B1” Languages: ➢ Spanish​ ​-​ ​Fluency:​ ​Native​ ​speaker. ➢ English​ ​ ​ ​-​ ​Fluency:​ ​Full​ ​professional​ ​proficiency. ➢ Italian​ ​ ​ ​ ​ -​ ​ ​Fluency:​ ​Basic​ ​proficiency. Conference​ ​speaker: ➢ "Engineering​ ​Week"​ ​event​ ​with​ ​"WebRTC​ ​Basics".​ ​National​ ​Technological​ ​University. July​ ​2014.​ ​Link:​ ​http://juanroldan.com.ar/talks/web-rtc-introduction.pdf ➢ "Engineering​ ​Week"​ ​event​ ​with​ ​"Meteor​ ​Basics".​ ​National​ ​Technological​ ​University.​ ​June​ ​2013.​ ​Link: http://juanroldan.com.ar/talks/meteor-javascript-framework-for-the-future.pdf ➢ "Engineering​ ​Week"​ ​event​ ​with​ ​"Fast​ ​Mobile​ ​Prototyping".​ ​National​ ​Technological​ ​University.​ ​July​ ​2012.​ ​Link: http://juanroldan.com.ar/talks/fast-mobile-prototyping.pdf Other ➢ Italian​ ​Citizenship:​ ​Granted​ ​on​ ​September​ ​12th,​ ​2014. ➢ Fitness​ ​Enthusiast:​ ​Regularly​ ​attend​ ​the​ ​gym. ➢ Favorite​ ​sports​:​ ​Soccer,​ ​Paddle​ ​and​ ​Swimming. ➢ Big​ ​fan​ ​of​ ​barbecues​ ​and​ ​electronic​ ​music. ➢ Linkedin​ ​profile​:​ ​http://ar.linkedin.com/in/juanroldan89/ ➢ Stackshare​ ​profile:​ ​http://stackshare.io/juanroldan1989/my-stack ➢ Working​ ​examples​ ​mainly​ ​used​ ​to​ ​test​ ​and​ ​experiment​ ​different​ ​technologies​ ​during​ ​time: https://github.com/juanroldan1989/ionic-movie-quotes https://github.com/juanroldan1989/movie_quotes https://github.com/juanroldan1989/event_finda_ruby https://github.com/juanroldan1989/my-budget-app https://github.com/juanroldan1989/find-my-post https://github.com/juanroldan1989/foodie-blog-api https://github.com/juanroldan1989/foodie-blog
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