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Rating is 4.8 out of 5.
4.8/5
based on 758 client reviews
  2. Development & IT Talent
  3. Full Stack Developers
  4. (Current) Heroku Specialists
  • US$85 hourly

    • 4.9/5
    • (134 jobs)
    I'm mostly focused on efficiently making small web applications for personal, rapid prototyping, internal-use only, MVP or proof of concept purposes. Some of my past apps have been converting "spreadsheet apps" into web apps, and web apps that import/export spreadsheets. I build my apps with a strong emphasis on function over form, as I'm more of a backend developer. This means that the apps have a simple appearance, but they get done quickly enough. Some of the features I've implemented for my own and client's apps have been: - Play different sounds depending on response from server - Import data from Zoho Docs (via API) - Import data from Google Docs - Import data from an Excel file - File downloads (for the user or for data import to server) - Geo-caching via Ruby Geocoder gem and Geocod.io, find the nearest address in the database to a user - Background Job Scheduling. Useful for complex calculations or things that can wait, so the user doesn't have to. - Send emails via MailGun - Created a Ruby Gem - Data import automation via Zapier - Data searching/filtering/sorting via AJAX (no page reload) - Search, Sort and Paginate via Ransack and Kaminari gems - Automated testing and specs with Rspec and Capybara. Background: I learned Java and C++ while getting my associate's degree. I then learned Python through Udacity's online courses, and used that for a couple years while researching algorithms, data structures and the hard problems in computer science. In the last couple years, I've been putting my programming skills to work towards becoming a full stack web developer. While I'm familiar with front-end work (CSS/HTML/JavaScript) and use them often, my previous programming experience makes me stronger toward back-end work.
    vsuc_fltilesrefresh_TrophyIcon Heroku
    AppSheet
    Airtable
    SaaS Development
    Web Development Consultation
    Database Integration
    Web Development
    Database Development
    Microsoft Excel
    Google Sheets
    GitHub
    Zapier
    Git
    JavaScript
    CSS
    Ruby on Rails
  • US$120 hourly

    • 5.0/5
    • (16 jobs)
    Full-stack developer with +22 years of experience, helping US clients full-time since 2005. Refactoring & code simplicity master. Mentor on Codementor. Sun Certified Java Developer, Sun Certified Web Component Developer, Zend Certified Engineer PHP5 Expertise: vanilla javascript, React.js, Vue.js, React Native, Ruby, Ruby on Rails, Python, Flask, Django, Odoo, C++ (generics, metaprogramming), C, Java, PHP, Scala, Obj-C, Core Data, TDD. Can rapidly prototype ideas and maintain complex legacy apps. Completed more than 100 projects since 2005. Featured in Washington Post in March 2013 Client Recommendations (LinkedIn & Upwork): "Marek has been our primary programmer for over 10 years. His work is superb. He has an amazing combination of skills and qualities that make him highly successful and effective. He is very smart and reads extensively to continue developing his skills. He is a hard worker and is willing to work long hours if needed to make deadlines. He is an excellent, organized communicator and is available every day, regardless of time zones. He is a renaissance coder, meaning he has a huge breadth of knowledge in many many languages and platforms. He has a keen business sense and will approach all coding with a great understanding of flexibility and scalability for future business needs. Most of all, Marek's code is clean and well-structured. This is critical if you expect your software to last through future revisions and iterations. He does not take shortcuts. He develops a solid foundation, adheres strictly to MVC structure, and produces code that is clean, professional, reliable, and extensible." "Marek and I worked together on a very large PostgreSQL-based database application. At first, I had the ideas and Marek had all of the execution. But as we worked more together, Marek was increasingly coming up with new ideas to do things better and faster than I had considered" "It's a pleasure to work with Marek. He has top programing skills and will deliver top quality job. He is very professional and customer oriented. He understand quickly and precisely the needs and will advise you or make propositions if necessary. He know the importance of deadlines and be on time and on budget. He is always available and can work under tight deadline if necessary. I strongly recommend him." "Mark is #1 on my list of coders. He is a tenacious in his ability to get things done and his solutions are excellent. He is also excellent at trouble shooting problems and super responsive. He communicates effectively and keeps me well informed. My only regret is not having enough work to employ him full time" "Marek worked with us in late 2009 to completely rewrite our website using a new platform (Ruby on Rails) according to specific requirements. He did a fantastic job of pulling everything together, was communicative throughout the entire contract, and was very willing to work with us after the job completion to ensure that we were entirely satisfied with his work. It was a pleasure working with him and I would eagerly do so again in the future." "I met Marek in my home town, Mountain View, California a few years back when he was visiting the US. Over the years, we have also developed a very cordial and fruitful professional relation. He is not only a highly competent software developer with vast expertise covering many areas of software technologies, but also a pleasure to do business with. His technical competence is beyond doubt, and his pleasant personality, intelligence, prompt responses and attention to his clients, and high quality work are what make working and doing business with him always an enjoyable experience. My startup's user facing Web project has won quite a few praises so far from many parties. Marek's contribution and participation in said project are definitely important. I enjoy knowing him both as a person and as a honorable fellow professional, and will recommend him to anyone seeking his consulting services without reservations" "Marek built major pieces of our enterprise transportation product. He's smart, motivated, deeply knowledgeable across the entire web stack, and a consummate professional about his work. Great decision-making skills with a strong sense of practical tradeoffs. Highly recommended as a developer, project lead, or entrepreneur." "Marek did great work for us on BetterPPC - he delivers on time and on budget."
    vsuc_fltilesrefresh_TrophyIcon Heroku
    Web Application
    MySQL Programming
    Ruby on Rails
    Golang
    Objective-C
    C++
    Java
    WordPress
    API
    Ruby
    PHP
    JavaScript
    Perl
  • US$35 hourly

    • 5.0/5
    • (12 jobs)
    With a proven track record of successful achievements, I am pleased to present my self as a Software Engineer. Having strong educational background featuring a degree in BS Software Engineering, I strongly believe I can make a significant contribution to Web Developers. My web developing expertise includes: Building and maintaining dynamic websites. Strong database knowledge specifically MySQL. JavaScript,jQuery CSS and (X) HTML,Ruby on Rails, C, Python,JAVA, Heroku ,AWS Ec2, S3 Storage, Scrapy ,Selenium , Beautiful Soap . I possess excellent communication skills and can liaise effectively with clients.
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    Twitter/X Bootstrap
    Amazon EC2
    Selenium
    Bootstrap
    Web Application
    Ruby
    JavaScript
    React
    Scrapy
    Ruby on Rails
    Python
  • US$45 hourly

    • 5.0/5
    • (24 jobs)
    Primary expertise includes: — Ruby on Rails development — Frontend: VueJs — jQuery/Javascript, CoffeeScript — HAML, CSS3 — Git — Search Libraries: Elastic Search, Sphinx — DB: Postgres, MYSQL, MongoDB — API development: RESTful APIs — Testing: RSpec & Capybara and have done TDD (Test Driven Development)/BDD (Behaviour Driven Development) on several projects. — Cloud hosting: Comfortable handling server setups & deployments and have experience working with dedicated servers, Amazon EC2, Heroku. — Methodology: Agile & Scrum/Kanban methodologies and great communication skills. I would love to help you build a state of the art web application just as much as I would enjoy working on existing or legacy projects (developing new features, updating technologies, or bringing best practices and testing into unstable or poorly structured code). If you have a project where you feel I can help out, please don't hesitate to get in touch!
    vsuc_fltilesrefresh_TrophyIcon Heroku
    API
    DigitalOcean
    Amazon ECS
    PostgreSQL Programming
    Docker
    RESTful API
    Git
    Ruby
    MongoDB
    MySQL
    Ruby on Rails
    Vue.js
    JavaScript
    GraphQL
    jQuery
  • US$60 hourly

    • 5.0/5
    • (3 jobs)
    A Full-Stack Developer with several enterprise projects under my belt, with experience in all the tools needed to get your idea up and running. I like to work closely with my clients and encourage a lot of communication, as this is your dream, I'm just building it. I am experienced working with other developers, both as a team and as independents, although I can just as comfortably work alone and run your projects from start-up to sell-off. Poly lingual, feature focused, and highly communicative, I'm happy to talk about any project that'll offer a challenge. I have been working mostly in React and Node for the past year, specifically with the Sharetribe Flex Marketplace Platform, developing customized components and features, integrating them with the platform. My most recent projects include; -Multiple marketplaces developed with Sharetribe Flex - Fully customized marketplaces with video uploads, multiple currencies, custom transaction processes and more. -A multi-stop route optimization app utilizing the Google API and several home sprung algorithms to save businesses hundreds of hours of work in planning trips. Written in Ruby on Rails and Javascript, using PostGre SQL as a back end, I leverage data analytics to comb through customer data and provide -React.Js -Node.Js -Next and Gatsby -Ruby on Rails -Database Design and Administration -MySql, PostGres, MongoDB -GitHub, Heroku, Trello, Amazon, Digital Ocean, Linux -UI and UX Development
    vsuc_fltilesrefresh_TrophyIcon Heroku
    UX & UI
    API Integration
    API
    GraphQL
    PostgreSQL
    Sharetribe
    JavaScript
    Java
    Linux System Administration
    MySQL Programming
    PostgreSQL Programming
    Ruby on Rails
    React
    GitHub
  • US$35 hourly

    • 4.6/5
    • (76 jobs)
    Expertise in Ruby on Rails & advanced JavaScript development Proficient in REST API creation and social media integrations Experience ReactJS frameworks Agile in fast-paced environments, focusing on delivery and quality Committed to building robust, user-centric web solutions
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    Apollo.io
    React Native
    Front-End Development
    React
    TypeScript
    Ruby on Rails
    jQuery
    GraphQL
    Web Application
    Python
    Node.js
    HTML5
    JavaScript
  • US$20 hourly

    • 5.0/5
    • (21 jobs)
    I am a professional web developer with over 8 years of experience. My current main framework for web development is Ruby on Rails. I started using this framework in 2013 and eventually fell in love with it. Rails has now become a part of my life. Using Ruby on Rails and other technologies, I can realize innovative ideas and turn them into products that add great value to users. I always look for new challenges and never stop improving myself in order to become an expert in the field of web development. My main areas of expertise: + Ruby on Rails + Ruby gems: Devise, Carrierwave, Paperclip, HAML, Capistrano, Resque, Sidekiq, Mongoid and more + TDD and Unit Testing with Cucumber, Rspec, Cabybara + Front-end technologies: AJAX, CSS3, HTML5, jQuery, ReactJS, React-Redux + Mobile-first responsive design: Bootstrap, Zurb Foundation + Relational and NoSQL databases: MySQL, PostgreSQL, MongoDB, Redis + Payment service integration: Paypal, Stripe, Checkout, Inpendium + Deployment platforms: Heroku, AWS, DigitalOcean, VPS + Amazon Web Services: CloudFront, Elastic Load Balancer, OpsWorks, ElasticCache, ElasticBeanstalk, etc + Social network and third-party integration: Google Maps, Google API, Facebook, Twitter + Multilingual web applications + Git workflow + Management tools: Trello, Pivotal Tracker, Redmine, JIRA.
    vsuc_fltilesrefresh_TrophyIcon Heroku
    API
    RSpec
    Amazon EC2
    jQuery
    AngularJS
    Ruby on Rails
    React
    Node.js
    SQL
    Amazon Web Services
    PostgreSQL
    Ruby
    ExpressJS
  • US$80 hourly

    • 4.9/5
    • (41 jobs)
    I'm a Senior Full-Stack Engineer with 10+ years of experience who has worked in diverse industries, I am a good team player who loves to work on interesting missions to bring his expertise to provide value to customers. My unique flexibility allows me to always give all of me regardless of the project, it's even one of the things that fuel my life: the ability to handle different things and learn at the same time. I'm very professional whenever needed and at other times a good joker, soccer player, and writer. Taking initiatives that will advance the team and/or the project is what defines me the most while working collaboratively. My skills are in Solutions Architecture, DevOps, Cloud, programming, and Salesforce.
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    Salesforce
    Solution Architecture
    QuickBooks Online API
    API Development
    WordPress
    Microservice
    Angular
    MongoDB
    JavaScript
    Java
    Node.js
    React
    Amazon Web Services
    Spring Boot
  • US$15 hourly

    • 4.6/5
    • (5 jobs)
    I have all my experience with Ruby On Rails and have hands-on experience with rails enterprise-level web application, application design, database design, performance-oriented systems with the best of my skills. I have two years of experience in building rails applications and APIs engines with the most used and efficient gems which are commonly required in many applications. Thank you for your time and consideration. I look forward to speaking with you about this opportunity.
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    Ruby on Rails Stack
    UX & UI
    Tailwind CSS
    HTML
    React
    MySQL
    Web Development
    PostgreSQL
    Bootstrap
    jQuery
    Ruby
    JavaScript
    CSS
    Ruby on Rails
  • US$15 hourly

    • 5.0/5
    • (31 jobs)
    Do you have a task that you need automated? A Telegram bot idea you want to be brought to life? Or even better, a telegram bot to automate your tasks? Or a Telegram webapp for cryptocurrency mining? Basically anything Telegram or anything bots?! Then I'm your guy! I specialize in: -Python Programming Language -Telegram bot development -Telegram WebApp development -Telegram mass messaging -Web scraping -Web automation I automate anything I possibly can!
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    Telegram API
    Web Scraping
    Machine Learning
    Web Crawling
    Chatbot Development
    Bot Development
    Automation
    Data Scraping
    Data Science
    Chatbot
    Selenium
    Telegram
    Python
  • US$28 hourly

    • 5.0/5
    • (23 jobs)
    🥇 𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗣𝗟𝗨𝗦 | ⏳ 𝟰+ 𝗬𝗲𝗮𝗿𝘀 𝗼𝗳 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 | ⭐ 𝟰.𝟵 𝘀𝘁𝗮𝗿𝘀 𝗿𝗮𝘁𝗲𝗱 | 𝟭𝟬𝟬% 𝗖𝗹𝗶𝗲𝗻𝘁 𝗥𝗲𝗰𝗼𝗺𝗺𝗲𝗻𝗱𝗲𝗱. ✮✮✮✮✮ Go from zero to MVP. Then MVP to full scale. ✮✮✮✮✮ ✅ 4000+ Hours logged on UpWork. ✅ 5 Star Reviews. ✅ 4+ Years of experience in Web app development 𝗣𝗿𝗶𝗺𝗮𝗿𝘆 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝗲𝘀: ✔ Ruby on Rails development ✔ Frontend: React Js, jQuery/Javascript, CoffeeScript ✔ Front-End Development | HTML5/CSS3, TailwindCSS, Bootstrap5 - JavaScript Frameworks | jQuery, React ✔ HAML, CSS3 ✔ Git ✔ Databases: Postgres, MongoDB, MYSQL ✔ API development: RESTful APIs ✔ Testing: RSpec & Capybara and have done TDD /BDD ✔ DevOps: Comfortable handling server setups & deployments and have experience working with dedicated servers, Amazon EC2, Heroku. ✔ Methodology: Agile & Scrum/Kanban methodologies and great communication skills. ✔ Task Management: Trello,Asana,Jira,Basecamp 🔰 I am a passionate and Top Rated web developer who loves to develop new ideas. To utilize my capabilities and technical skills to bring out the best of me and to be active and flexible in the ever-changing technological environment. If you choose to work with me, I can guarantee you that I will provide: ➜ Quick on-time delivery. ➜ Good communication and Regular updates on the project status. ➜ Clean and optimized code. ➜ Unlimited revisions till you are satisfied. 💻 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗦𝗸𝗶𝗹𝗹𝘀: 👉 I have more than 3 years of Hands on experience in Ruby on Rails, jQuery, HTML5, CSS3, HAML, SASS, MySQL, PostgreSQL, and Redis. 👉 I have worked on many enterprise applications and successfully handled their front end using HTML, Angular, CSS, jQuery, Bootstrap and back end using Rails, MySql, Postgres based on TDD/BDD development techniques.
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    Ecommerce Website Development
    Web Development
    Capybara
    Web Application
    Amazon S3
    Xero
    Shopify
    React
    Stripe API
    Airtable
    API Development
    Amazon Web Services
    Ruby on Rails
    PostgreSQL
  • US$27 hourly

    • 4.8/5
    • (13 jobs)
    Hello! I'm a seasoned full stack developer with 11+ years of experience in building scalable and robust applications. I have successfully worked on a variety of projects, both large and small, and am passionate about delivering high-quality solutions. Skills & Expertise: - Comprehensive Frontend and Backend Experience: Proficient in both frontend and backend development, ensuring seamless integration and functionality. - Ruby on Rails Specialist: Extensive experience with Ruby on Rails (3.x, 4.x, 5.x, 6.x, 7.x), crafting efficient and scalable backend solutions. - Modern Frontend Frameworks: Skilled in React.js, AngularJS, Vue.js, and Bootstrap, creating dynamic and responsive user interfaces. - Database Management: Proficient with PostgreSQL, ensuring data integrity and performance. - Deployment & Version Control: Experienced with Heroku and Git for smooth deployment and version control. - Leadership Experience: Proven track record as a lead developer, guiding teams and projects to successful completion. - Task Management: Dedicated to keeping tasks on track and meeting deadlines. - Quality Assurance: Strong background in writing tests to ensure robust and reliable applications. - Startup Experience: Adept at working with startup teams, contributing to fast-paced and innovative environments. - Simplicity & Usability: Focused on creating simple, user-friendly frontend experiences. - Continuous Integration & Deployment: Experienced with CI/CD practices, streamlining the development process. If you're looking for a dedicated, experienced, and versatile full stack developer to bring your project to life, let's connect and discuss how I can help achieve your goals.
    vsuc_fltilesrefresh_TrophyIcon Heroku
    .NET Core
    PostgreSQL Programming
    MySQL Programming
    CSS
    HTML
    JavaScript
    GitHub
    Amazon EC2
    Amazon Web Services
    Ruby
    React
    Ruby on Rails
    jQuery
    Docker
  • US$30 hourly

    • 3.9/5
    • (16 jobs)
    11 years of web development experience. Professional, a self-motivated and goal-driven software engineer who brings nothing but "BEST" to the table. I am proficient in backend development using Ruby on Rails and also well versed with Artificial Intelligence, Data Science and other web development technologies like React and Node. I have also worked with Hadoop in different Big Data related projects. I like to take challenges so can do almost a bit of everything and always keen to learn something new. - Worked on projects of almost every scale, from startups to multi-million-dollar businesses and worked closely with the professional teams and also individually. - Fluent English speaking skills. - Backend development using Ruby on Rails, Node.js. - Experienced integrating and developing complex APIs with front-end in AngularJS/ReactJS/JavaScript/HTMLS5/CSS3/REDUX/Vue.js. - Well versed with writing tests in Capybara, RSpec & Cucumber. - Databases like, MongoDB, PostgreSQL, MySQL. - Server management and deployments using Circle CI, Docker & Jenkins on platforms like Amazon AWS, Heroku and Rackspace.
    vsuc_fltilesrefresh_TrophyIcon Heroku
    Redux Thunk
    React Native
    Database Design
    App Development
    Fortune 500 Company
    Redux Saga
    Amazon Web Services
    Ruby on Rails
    React
    CSS 3
    HTML5
    Node.js
    JavaScript
    AngularJS
    Bootstrap
  • US$25 hourly

    • 4.9/5
    • (116 jobs)
    🏆 TOP RATED PLUS | 8000+ Upwork hours work | $200K+ earnings 🏆 100+ Web/Mobile App Development Projects from Scratch (Front End & Back End) Empowering businesses to thrive in the digital realm through expertly crafted web and mobile applications. Do you want someone who is an expert in React, Material UI, UI/UX, Tailwind CSS, Next.js, Node.js, Python, AWS services, and a Contentful expert for your next big project? ✅ 𝐁𝐄𝐍𝐄𝐅𝐈𝐓𝐒 𝐓𝐎 𝐇𝐈𝐑𝐄 𝐌𝐄: ➤ Eye-catching Websites and Web & Mobile Applications ➤ Clean & High quality best Structure Code ➤ 100% CLIENT RECOMMENDATION ➤ FAST EXECUTION and get accurate results ➤ Meeting deadlines ➤ Daily Updates ➤ Your satisfaction is my number one priority. ➤ Fluent and transparent communication. ➤ Always use an Agile Methodology. ( Notion, Github, Git, Jirra, Clickup, BitBucket and many more tools) 👩‍💻 𝐓𝐄𝐂𝐇𝐍𝐈𝐂𝐀𝐋 𝐄𝐗𝐏𝐄𝐑𝐓𝐈𝐒𝐄: 📌 Frontend Skills: ✓ React.js / React Native / Micro frontend - Module Federation ✓ Next.js / Nuxt.js / Sanity CMS / Locofy.ai / Contentful / Builder.io ✓ Material UI / Antd / Bootstrap / Tailwind CSS ✓ Single-spa, mono repo, Nx.dev, Microfrontend, Webpack 5 module federation ✓ Angular 2+ All latest versions ✓ Vue JS ✓ Bootstrap ✓ HTML, CSS, ✓ GraphQl ✓ GatsBy 📌 Back End Skills: - Go, Golang, Nodejs, Python, Django, Flashk, PHP, Laravel 📌 Database: - MySQL (Relational Database) - PostGre, SQLite (Relational Database) - Mongo (Non-relational Database) -Elasticsearch -Algolia - Airtable & Contentful & Strapi & Directus & Gatsby 📌 AWS Services - AWS Cognito, Lambda, S3, IAM User, SES, SNS, DynamoDB, API Gateway, and many more Technical skills + Agile approach + Spoken English = Your success! Related technologies: ⭐️Redux, Redux-saga, Redux-Thunk, Airbnb style guide, react PWA, storybook ⭐️Expo, RN CLI ⭐️Flow, ESLint, Webpack ⭐️Progressive Web apps ⭐️Node.js ⭐️WebRTC, WebSockets, video conferencing app, live streaming, e-teaching I am currently helping businesses to transform into the fast-growing digital economy as a full-stack developer having 12+ years of commercial experience. I have consulted for many clients, providing guidance on Web-based Applications, database engineering, and API Development as well as design and user experience & Application Deployment. I can get you off to a good start, and make sure you're flying high. Dedicated to exceeding your expectations with the highest-quality software, delivered on time ⏳ and to your precise needs. Together, let's create a great product. Invite me OR 📩 message me if you want me to help you provide 💡 suggestions or services that can help you achieve your business 🎯 goals. Waiting to hear you! Cheers 🍻. 😀 Mitul Kanani
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    Flutter
    Front-End Development
    Firebase
    React Native
    Redux
    Amazon Web Services
    Laravel
    Python
    Web Application
    GraphQL
    TypeScript
    Next.js
    JavaScript
    Node.js
    React
  • US$25 hourly

    • 5.0/5
    • (1 job)
    Hello, I'm Jobayer Ahmed, a seasoned Full Stack Developer with over 4 years of experience in a US-based software company remotely. I specialize in creating robust and scalable web applications using cutting-edge technologies. My expertise spans across various frameworks and languages, making me well-versed in delivering end-to-end solutions. Key Skills: Node.js, Nest.js, Express.js: Leveraging the power of Node.js for efficient server-side development. Angular, TypeScript, RxJS: Crafting dynamic and responsive front-end applications with Angular and TypeScript. HTML5, CSS3: Designing elegant and modern user interfaces for a seamless user experience. Ag-Grid: Implementing advanced data grids to handle and display large sets of data. PostgreSQL: Proficient in database design and management, ensuring optimal performance and reliability. Why Choose Me: Proven Track Record: I bring 4+ years of hands-on experience in a US-based software company, showcasing a track record of successful projects and satisfied clients. Full Stack Expertise: My skill set covers both front-end and back-end technologies, allowing me to provide comprehensive solutions tailored to your needs. Passionate Problem Solver: I thrive on overcoming challenges and finding innovative solutions to complex problems. Effective Communication: I believe in transparent and effective communication, ensuring that you are always informed about the progress of your project. Let's Collaborate: If you're looking for a dedicated and skilled Full Stack Developer to bring your ideas to life, let's connect. I am committed to delivering high-quality solutions that exceed your expectations. Feel free to reach out, and let's discuss how we can make your project a success.
    vsuc_fltilesrefresh_TrophyIcon Heroku
    RabbitMQ
    Redis
    NestJS
    RESTful API
    HTML
    Docker
    Kubernetes
    Angular
    TypeScript
    ExpressJS
    JavaScript
    PostgreSQL
    MySQL
    React
    Node.js
  • US$30 hourly

    • 4.6/5
    • (290 jobs)
    ✅ #1 Ruby on Rails Developer ( Top 1%) 🌎, ✅ Certified Ruby Programmer. ( Upwork Top 1%) ✅ Upwork Certified Ruby on Rails Developer. ✅ Award-winning open source platforms customization Expert e.g. Spree, Sharetribe. ✅ 200+ Ruby on Rails Projects Completed ✅ 280+ Upwork Jobs Completed ✅ 40+ React projects completed. I am a qualified senior full-stack Ruby on Rails developer having good experience in all the tools required to develop large, sophisticated, and highly scalable software. I'm able to pull any technically possible job in the Ruby on Rails tech stack. I have experience with working on well-funded growing startups from around the world to build their product individually and with collaboration on their team. Clients and investors continuously validate Ruby on Rails products and the projects I have worked on in the past. I have extensive expertise in Front-end, Back-end, Web services, and API development. I have vast experience in building a highly responsive, web-based user interface using React, Bootstrap, HTML, CSS, Javascript, Jquery, and other tools. I have good experience in Spree Ecommerce web apps with different admin flows. I have customized Spree Ecommerce web apps for multi-vendor and multi-tenancy. I have vast experience with the Sharetribe framework and have worked on more than 150+ Sharetribe projects so far from the ground up. I have done a lot of customization in already migrated Sharetribe projects. I have good experience with Sharetribe Flex and Sharetribe Go open-source - I started working on Rails 2.3 and working on the latest version of rails (7x). I also have extensive experience working on legacy architectures. - I have more than eight years of experience with web development, including 7+ years of rails. - I have worked on the rails apps from scratch and provided maintenance on existing rails apps. - I have good experience with Erlang and I have worked on the Mongoose IM server, and have built several chat applications in Erlang from the ground up. - I am an avid user of Github, Heroku, Bitbucket, Amazon AWS, ElasticBeanstalk, Amazon S3, Digital Ocean server, Linode server, and Project Management Tools like Trello, Asana, Pivotal Tracker. - I have very good experience and capability with PostgreSQL, MySql, Neo4j databases. Are you looking for a Ruby on Rails Developer? Are you looking for a Sharetribe developer? Or Are you looking for a Sharetribe Customization Expert? I am the answer to all above questions😊
    vsuc_fltilesrefresh_TrophyIcon Heroku
    Custom Ecommerce Platform Development
    API Integration
    Ruby on Rails
    Erlang
    ExpressJS
    Sharetribe
    API
    Amazon Web Services
    Spree
    React Native
    React
    Node.js
    Ruby
    PostgreSQL Programming
  • US$30 hourly

    • 4.8/5
    • (38 jobs)
    I am a Senior Full-Stack developer with more than 7 years of experience with Ruby, Ruby on Rails, React.js, Javascript, Git, Mysql/Postgresql/ AWS, Heroku, and all other development tools. I'm having extensive experience in both front-end and back-end development. My skills: - Ruby/Ruby on Rails - React.js, Redux, Typescript, Graphql - SQL DB's: PostgreSQL, MySQL, Oracle - NoSQL, in-memory, key-value stores: MongoDB, Redis - HAML, SASS, jQuery, Twitter Bootstrap - JS MVC: React.js Backbone.js, - TDD/BDD: RSpec, Capybara, Cucumber, Selenium - API: Facebook, Twitter, Amazon, Google Maps etc. - Git, Svn - Github, Gitlab, Bitbucket - various gems and libraries Please provide me a chance to serve you with my skills.
    vsuc_fltilesrefresh_TrophyIcon Heroku
    Sharetribe
    React Native
    Spree
    GitHub
    API Development
    Backbone.js
    Shopify
    React
    JavaScript
    Ruby
    Amazon Web Services
    Ruby on Rails
  • US$20 hourly

    • 5.0/5
    • (14 jobs)
    Hello! I’m Nauman Khan, a seasoned Senior Ruby on Rails Developer and Full-Stack Engineer with over 5 years of in-depth experience in building scalable web applications. I specialize in Ruby on Rails, React.js, and DevOps, leveraging my expertise to deliver high-quality, maintainable code across various sectors, including healthcare, fintech, and e-commerce. With a robust background in back-end development, I excel in creating efficient and secure applications using Ruby, Python, and JavaScript. My proficiency in full-stack development ensures seamless integration of front-end and back-end technologies, providing a superior user experience. 🛠️ Skills & Expertise: ✅ Backend Development: Languages: Ruby, Python, JavaScript (ES6+) Frameworks: Ruby on Rails, NodeJS, Databases: PostgreSQL, MySQL, MongoDB, Oracle API Development: RESTful APIs, GraphQL Background Job Handling: Memcache, Redis, RSpec, Sidekiq ✅ Frontend Development: Languages: React.js, Next.js, JavaScript, jQuery, CoffeeScript, Stimulus.js, HTML5, CSS3, SCSS Frameworks/Libraries: ReactJS, Next.js, Angular, jQuery, Bootstrap, Tailwind CSS Tools: Webpack, Gulp ✅ DevOps & Deployment: Cloud Platforms: Heroku, Google Cloud, DigitalOcean, Azure Containerization: Docker, Kubernetes CI/CD: GitHub Actions, GitLab CI, Jenkins Configuration Management: Ansible, Terraform ✅ Integration: APIs: Google Maps, Bitgo, Skyscanner, Google Finance, LinkedIn, DocuSign, YouTube, Facebook, Twitter, and more! Payment Gateways: Stripe, Square, Xero, PayPal, Google Pay, Apple Pay ✅ Version Control: Systems: Git, GitHub, BitBucket, GitLab, Azure Devops Ready to take your web project to the next level? Let’s collaborate and transform your vision into reality with precision and excellence!
    vsuc_fltilesrefresh_TrophyIcon Heroku
    SaaS Development
    Test-Driven Development
    Web Application
    JavaScript
    Web Development
    React
    Git
    API Development
    API Integration
    Ruby
    Web Service
    Ruby on Rails
    RESTful API
  • US$220 hourly

    • 4.9/5
    • (47 jobs)
    𝐄𝐱𝐩𝐞𝐫𝐭-𝐕𝐞𝐭𝐭𝐞𝐝: 𝐓𝐨𝐩 𝟏% 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤 Want to drive growth with AI? Need a custom ML solution, or to integrate chatGPT into your team's workflows? Let's talk. I specialize in AI, deep learning and large language models (LLMs). Additionally, I have years of experience as a backend developer - I can ensure your application meets production quality scalability and security standards. I excel at problem-solving, and can deliver solutions that will provide deep value for your business. Reviews from past clients: 𝐌𝐚𝐫𝐜 𝐃𝐞𝐮𝐬𝐭𝐞𝐫, 𝐅𝐨𝐮𝐧𝐝𝐞𝐫 & 𝐂𝐄𝐎 𝐨𝐟 𝐖𝐲𝐝𝐞𝐧 𝐂𝐚𝐩𝐢𝐭𝐚𝐥: "Ruairí took our trading algorithm to the next level. He was punctual, reliable, and a nice guy to work with. Looking forward to do so again in future." 𝐄𝐥𝐚𝐢𝐧𝐞 𝐊𝐞𝐥𝐥𝐲, 𝐂𝐨-𝐅𝐨𝐮𝐧𝐝𝐞𝐫 𝐨𝐟 𝐊𝐥𝐢𝐫 𝐖𝐚𝐭𝐞𝐫: "Ruairí's LLM application added significant value to our software stack. He took our business requirements, met with stakeholders, and delivered his AI solution on time and to specification. We'd highly recommend him and hope to work with him again in future." 𝐓𝐢𝐦 𝐒𝐭𝐮𝐫𝐠𝐢𝐬𝐬, 𝐅𝐨𝐮𝐧𝐝𝐞𝐫 𝐨𝐟 𝐇𝐮𝐠𝐥𝐨 𝐄𝐧𝐞𝐫𝐠𝐲: "Ruairi is a great freelancer and he helped solve many problems in our backend. He is very committed to the task and will troubleshoot issues to get to the project objectives. Ruairi's communication is first class and I can recommend him to any business" 𝐒𝐤𝐢𝐥𝐥𝐬: • LLMs • High-Throughput AI Engineering • Pytorch • FastAI • Python • Node & Typescript • Rust • Databases (SQL, Document, KV) • Cloud Computing/Devops/Infrastructure (AWS, Azure, GCP) 𝐇𝐨𝐰 𝐓𝐨 𝐆𝐞𝐭 𝐒𝐭𝐚𝐫𝐭𝐞𝐝: I offer 15 minute consultations to discuss your business needs. Expert advice, tailored to your use case. By the end of the call, you'll have a greater understanding of what your project involves. Shoot me a message and let's talk. I freelance full time and respond to all queries within 24 hours. Let's get to work!
    vsuc_fltilesrefresh_TrophyIcon Heroku
    Deep Learning
    Gemini
    LLaMA
    GPT Chatbot
    TensorFlow
    PyTorch
    GPT-4
    ChatGPT
    AI Consulting
    Generative AI
    Python
    AI Chatbot
    Artificial Intelligence
    Machine Learning
    Natural Language Processing
  • US$95 hourly

    • 4.9/5
    • (218 jobs)
    Upwork "Top-Rated Plus" for Hubspot Development with a 5 Star feedback rating w/extensive project volume history. Multi-year Hubspot Champion User - (top 1000 users/developers worldwide) I speak fluent/native US English as I am from the Midwest US and reside in Tennessee. I work mainly in Hubspot and related technologies where Hubspot is the central marketing platform or CRM. I started with an early Hubspot Partner and I have been at this for a good while. Hubspot and I grew-up together, you might say. Hubspot CMS/CMS, CRM, API integrations and extensions are what I work in daily. I can support your Hubspot CMS and Wordpress/Hubspot hybrid template production needs, as well as Hubspot CRM and its integration endpoints via Zapier or hardcoded in PHP, NodeJS, or Python on AWS, Heroku or Google Cloud Platform (GCP). I do many custom and undocumented API custom integrations with Hubspot. I also offer Inbound and Hubspot CRM consulting services and coaching. Google Tools integrations and advanced Google Maps for Hubspot are one specialty. I deliver the following projects on a routine and daily basis and well as consult and architect solutions related to Hubspot. Hubspot CMS, CRM & API setups, consulting, web design, development and integrations. Solutions Architect Figma Advanced Workflows (third-party systems) Data Enrichment Project Rescue Hubspot Extensions API (CRM "card" integrations w/ 3rd party apps and platforms) JSON, REST API, NodeJS, Python, SOAP, Javascript, Next.js, JQuery, AJAX, XML, Google Scripts, service account programming Google Maps, Google Platform Tools, GCP, Google Apps Scripts & Redis/MongoDB, Postgres Zapier / Make.com / Airtable Aircall Shopify Zenoti Custom one-of-a-kind applications / ad hoc Hubspot Marketplace purchased theme customization & site revamps Call Center integrations like AirCall, Five9, Spitfire, Yodel/Slack into Hubspot CRM. Mojo Dialer Tracers API If you are looking to integrate Hubspot with ANYTHING ON EARTH, I have vast experience in this type of work via REST API development and integrations. I may be able to help you maximize your investment in Hubspot in a myriad of ways. I am fluent in many technologies in general and efficient in customizing responsive Hubspot Marketplace templates to accommodate your branding needs. Competitive pricing, Zoom consultations and no language barrier to USA English!
    vsuc_fltilesrefresh_TrophyIcon Heroku
    RESTful API
    Website Redesign
    Templates
    Google APIs
    Inbound Marketing
    API
    API Integration
    API Development
    Shopify
    Zapier
  • US$55 hourly

    • 5.0/5
    • (191 jobs)
    As a developer, my priority is to see my code deployed and in use by users. I take ownership of any problem that we are trying to solve and attempt to come up with practical, sustainable, and direct solutions that deliver the maximum impact to users. Over the years, I have worked with a wide range of technologies, including mobile app development (Android, iOS, React Native), web app development (React, Angular, Vue.js), backend API development (Node.js, Java, Python), and DevOps (CDK, Jenkins, Fastlane) across various cloud platforms (AWS, GCP, Azure). I have also been building and leading teams since 2019, and have been fortunate to work with a number of awesome clients and teammates over the years. As they say, teamwork makes the dream work! In my free time, I love to swim and hike.
    vsuc_fltilesrefresh_TrophyIcon Heroku
    Firebase
    Kotlin
    Swift
    Android
    iOS
    Java
    CI/CD
    ExpressJS
    MySQL
    React
    Node.js
    Mobile App Development
    JavaScript
    Python
    React Native
  • US$70 hourly

    • 4.9/5
    • (78 jobs)
    I am an expert freelancer and my 10+ year multi-sector background prepares me for nearly any type of SaaS, Fintech, Ecommerce, CMS, Web3 based solution. I fully integrate into my client's teams including on-premise, remote, or hybrid scenarios, and I collaborate effectively in agile/scrum style project management styles. My preferred project architectures include but are not limited to Ruby on Rails/Node backends and React/Angular/Vue frontends, deployed on both cloud (AWS, Heroku, google cloud, and Azule) and on-premise infrastructures. With these particular configurations, I produce superior and sustained results. This pattern predicates my success due to my immense organization skills, my full accommodation of my client's needs, and my clear goal staking to determining and establishing exact solution requirements and value-added engineering required to build their successful solutions. I am willing to work on jobs of any size, I have worked on one-off jobs solving specific problems requiring an expert, and I have also consistently had clients who retain me for over a year in some cases, allowing me to develop their solutions to maximum maturity and growth. I have solved nearly every type of use case imaginable in Rails-based architecture and can advise and collaborate with architects to ensure that the right decisions and implementations are taken into account. I am consistent, competent, communicative, and complete in my pattern of work. This is why I am one of the most experienced freelancers on Upwork in this space, logging almost 10k hours on Upwork. You cannot go wrong with hiring me, I provide the highest tier results available on all of Upwork.
    vsuc_fltilesrefresh_TrophyIcon Heroku
    Ruby
    Elasticsearch
    Unit Testing
    Spree
    React
    RESTful API
    RSpec
    Ruby on Rails
    Node.js
    Data Visualization
  • US$70 hourly

    • 4.7/5
    • (107 jobs)
    Qualified Full Stack Web Developer with 10 years of experience. I can help you with: - websites (custom-crafted and built on CMS); - apps; - SaaS platforms. Back-End ✔ MEAN (MongoDB, Express.js, Angular, and Node.js), MERN (MongoDB, Express.js, React, and Node.js); ✔ Python (Django, Flask, Tornado), Data Transferring; ✔ Restful API (Google APIs, Payment Processing, etc.); ✔ MySQL, PostgreSQL, MongoDB, etc.; ✔ Payment Gateways: PayPal, Stripe, Braintree, Wirecard, etc.; ✔ Server setup. Front-End ✔ HTML5/CSS3(W3C standard); ✔ Javascript (Angular, Ember.js, React JS/React Native, Node.js, Ajax, jQuery); ✔ Mobile-friendly layout coding; ✔ Front-end frameworks (Bootstrap, Tachyons, etc.) ✔ Cross-browser compatibility. Have any questions? Send me a message :)
    vsuc_fltilesrefresh_TrophyIcon Heroku
    FastAPI
    NoSQL Database
    NodeJS Framework
    AWS Lambda
    Flask
    Vue.js
    SaaS
    Web Development
    Node.js
    React
    Amazon Web Services
    Python
    SQL
    Django
    JavaScript
  • US$40 hourly

    • 4.7/5
    • (57 jobs)
    Hi, I am Isha Taneja, highly skilled in Data Analytics, Engineering & Cloud Computing from Mohali, India. I am an expert in creating an ETL data flow in Talend Studio, Databricks & Python using best design patterns and practices to integrate data from multiple data sources.  I have worked on multiple projects which require Data migration Data Warehousing development and API Integration. Expertise: 1. Migration - Platform Migration - Legacy ETL to Modern Data Pipeline / Talend / ERP Migration / CRM Migration - Data Migration - Salesforce migration / Hubspot Migration / Cloud Migration / ERP Migration 2. Data Analytics - Data Lake Consulting - Data Warehouse Consulting - Data Modelling / Data Integration / Data Governance / ETL - Data Strategy - Data Compliance / Data Deduplication / Data Reconciliation / Customized Data - Processing Framework / Data Streaming / API implementation / Data Ops - Business Intelligence - Digital marketing Analysis / E-commerce Analytics / ERP Reporting Capabilities - Big Data - Lakehouse Implementation 3. Software QA & Testing 4. Custom Application Development - UI/UX - Frontend Development - Backend Development 5. Cloud - Cloud-native Services/ AWS Consulting / Cloud Migration /Azure Consulting / Databricks /Salesforce 6. Business process automation - Bi-directional sync between applications / RPA A Data Professional and a ETL Developer with 10+ years of experience working with enterprises/clients globally to define their implementation approach with the right Data platform strategy, Data Analytics, and business intelligence solutions. My domain expertise lies in E-Commerce, Healthcare, HR Related, Media & Advertising, Digital Marketing You have the data? Great !! I can help you analyze it using Python. It involves performing exploratory data analysis, hypothesis testing, and data visualization. You have Big Data? Even Better !! I can help you clean, transform, store and analyze it using big data technologies and production it using cloud services like AWS and Azure Cloud. You want to track business KPIs and metrics? No Problem !! I can even help you develop reports using Tableau and PowerBI; this will always keep you ahead in your business. Specialities: Databases: Snowflakes, Postgres, Dynamo DB, Graph DB - Neo4j, Mongo DB, Data Warehouse concepts, MSSQL ETL-Tools: Talend Data Integration Suite, Matillion, Informatica, Databricks API Integration - Salesforce / Google Adwords / Google Analytics / Marketo / Amazon MWS - Seller Central / Shopify / Hubspot / FreshDesk / Xero Programming: Java, SQL, HTML, Unix, Python, Node JS, React JS Reporting Tools: Yellowfin BI, Tableau, Power BI, SAP BO, Sisense, Google Data Studio AWS Platform: S3, AWS Lambda, AWS Batch, ECS, EC2, Athena, AWS Glue, AWS Step Functions Azure Cloud Platform. Other Tools: Airflow Expect Integrity, Excellent communication in English, technical proficiency, and long-term support.
    vsuc_fltilesrefresh_TrophyIcon Heroku
    Databricks MLflow
    Databricks Platform
    Tableau
    Microsoft Power BI
    Data Extraction
    Talend Data Integration
    Data Analysis
    Microsoft Azure
    Continuous Integration
    AWS Lambda
    API
    Database
    Python
    SQL
    ETL
  • US$75 hourly

    • 4.9/5
    • (72 jobs)
    I’m an experienced Ruby/Rails developer with over a decade of experience. I’ve been on Upwork for 8 years, helping clients bootstrap their MVPs and maintain their web apps. I look forward to contributing to your project. Ruby/ Ruby on Rails v3 - v7.1 HTML, CSS, SASS, JS, jQuery, React JS DB: PostgreSQL, MySQL, MongoDB Devops: AWS, DO, Heroku, Azure, GCP - Web server, LB, Proxy Payment Gateway: Stripe, Paypal, Sagepay, Dintero Tools: Slack, Jira, Github, Bitbucket, Monday.com, Trello, Sentry, Honeybadger, New Relic, Rollbar APIs: Gmail, Google Map, Youtube, Cloudflare, IG, FB, Stripe, Shopify Others: Redis, email service integration, Linux/MacOS, Bootstrap, Event Store, Websocket, Elasticsearch, Sidekiq, Spree, email-warmup Github /tvcam
    vsuc_fltilesrefresh_TrophyIcon Heroku
    API Integration
    Ruby on Rails
    JavaScript
    PostgreSQL
    React
    MongoDB
    Redis
    MySQL
    Ruby
    Search Engine Optimization
    RSpec
    DevOps
  • US$25 hourly

    • 5.0/5
    • (5 jobs)
    Top-rated freelancer with 8+ years of building applications with Javascript (Typescript), Rails framework to deliver the business needs of end users, A big fan of Front-end technologies and a nerdy mind to work on Back-end frameworks and cutting-edge technologies. Languages & Frameworks: MERN/PERN Stack React, Angular Node.js, Ruby on Rails Solidity Android (Kotlin) DevOps Heroku, Azure, AWS EC2, EBS, RDS, CompassDB, MongoDB, PostgreSQL Strengths: Builds Long-term relationships Good and timely communication. Decorated Development Experience Have a team of developer so you can scale instantly Ready to build a test project for clients. Willing to work as an honest and positively determined developer, especially for long term projects.
    vsuc_fltilesrefresh_TrophyIcon Heroku
    Ruby on Rails
    DevOps
    API Development
    Front-End Development
    Blockchain, NFT & Cryptocurrency
    Serverless Computing
    RESTful API
    API Integration
    AWS Amplify
    AngularJS
    Deployment Automation
    React
    Mobile App Development
    JavaScript
    Angular
  • US$40 hourly

    • 4.8/5
    • (78 jobs)
    With over 13 years of comprehensive experience as a full-stack web developer, I specialize in utilizing a range of technologies including Ruby on Rails, PHP, Python, and Node.js for backend development. Worked with notable clients including worldwide renowned organizations like: - Tesco - Morrisons - Mamas & Papas - Sofology - JD - jet2 - UNICEF - Standford University Proficient in modern JavaScript frameworks such as ReactJS and AngularJS, I also have expertise in CSS frameworks like Bootstrap and Tailwind. I have a proven track record of collaborating with startups, SMEs, and Enterprises, successfully delivering 26 startups to date. My skill set extends to Agile and Scrum methodologies, complemented by excellent communication abilities. Having spent more than 8 years working with AWS, I am well-versed in various services including EC2, Elastic Beanstalk, S3 file serve, and Lambda. My project portfolio spans diverse domains, including ERP systems, IoT projects, financial applications, SaaS solutions, and e-commerce platforms. Thank you for considering my profile.
    vsuc_fltilesrefresh_TrophyIcon Heroku
    Ruby on Rails Stack
    Mockup
    Angular
    JavaScript
    React
    MERN Stack
    GitHub
    Ruby
    Laravel
    Python
    RESTful API
    Ruby on Rails
    MySQL
    PostgreSQL
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