𝗔𝗿𝗲 𝘆𝗼𝘂 𝗹𝗼𝗼𝗸𝗶𝗻𝗴 𝗳𝗼𝗿 𝗮 𝗳𝘂𝗹𝗹-𝘀𝘁𝗮𝗰𝗸 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝘄𝗵𝗼 𝘀𝗵𝗶𝗽𝘀 𝗔𝗜-𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝘀 𝗳𝗮𝘀𝘁, 𝘄𝗿𝗶𝘁𝗲𝘀 𝗰𝗹𝗲𝗮𝗻 𝗰𝗼𝗱𝗲, 𝗮𝗻𝗱 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝗰𝗮𝗿𝗲𝘀 𝗮𝗯𝗼𝘂𝘁 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗱𝘂𝗰𝘁'𝘀 𝘀𝘂𝗰𝗰𝗲𝘀𝘀? That's what I've done for 22+ clients across B2B SaaS, e-commerce, marketplaces, and AI-powered platforms building full-stack applications from greenfield MVP to production-grade systems handling real users and real revenue. ✔ $30K+ earned on Upwork — 100% Job Success Score across all contracts ✔ Top Rated Plus — awarded to the top 3% of freelancers on Upwork ✔ AI integrations delivered — OpenAI API, LLM pipelines, and AI features inside production apps ✔ 30+ products shipped — MVPs, multi-tenant platforms, API-first systems ✔ Engineering team lead experience — ChannelDispatch, UnitedWay, and more ✔ 1,940+ hours billed — long-term clients hire me back because I deliver value, not just hours ━━━ 𝗪𝗛𝗔𝗧 𝗜 𝗕𝗨𝗜𝗟𝗗 𝗙𝗢𝗥 𝗬𝗢𝗨 ━━━ → AI-powered features — OpenAI API integration, custom LLM workflows, and AI assistants embedded in your existing product. The right model with the right architecture. → Full-stack web applications — Rails backend, React frontend, Stripe billing, multi-tenancy, role-based auth, REST & GraphQL APIs. Production-ready from day one. → Performance & scalability — database optimization, background jobs (Sidekiq), Redis caching, query profiling. I fix the slow, the broken, and the brittle. → MVP to market — fast — clear scope, weekly milestones, daily async updates. You'll always know where we are and what's next. No surprises. ━━━ 𝗧𝗘𝗖𝗛 𝗦𝗧𝗔𝗖𝗞 ━━━ Ruby on Rails · React.js · PostgreSQL · Node.js · OpenAI API · Sidekiq · Redis · Docker · TailwindCSS · GraphQL · Stripe · AWS / Heroku ━━━ 𝗟𝗘𝗧'𝗦 𝗕𝗨𝗜𝗟𝗗 ━━━ Send me a message — I respond within an hour, and we'll scope your project for free. If you're serious about shipping, I'm the developer for you.

I'm a Ruby on Rails developer and full stack developer focused on SaaS and FinTech products. Day to day that's Ruby on Rails and React.js (Next.js, TypeScript) on PostgreSQL, deployed on AWS with Docker when the app needs it. 6+ years building production web applications — Top Rated Plus, 100% Job Success, 6,100+ Upwork hours, 85+ jobs. Most contracts run 1–4 years on one codebase. Available 30+ hours a week. Two years at SmartZip on their Rails + React lead-gen SaaS. Since then: B2B SaaS features, Stripe billing, GraphQL and REST APIs, Elasticsearch for search, Heroku-to-AWS migrations, Rails version upgrades. Frontend is React and Next.js; backend is Rails, Sidekiq, RSpec, and PostgreSQL done properly. I've also been adding AI features to live products — LLM API integration, chat interfaces and workflow automation. A long-term client, Olivier: "30+ eLearning apps, nearly 4 million plays — proactive, doesn't need hand-holding." Hiring a Ruby on Rails developer for ongoing SaaS work, full stack Rails + React, FinTech/Stripe, or a legacy app that needs a Rails upgrade or cloud migration? Send your repo or roadmap, I'll reply with an honest take on fit.

✅ Senior Ruby on Rails Developer ✅ Backend, APIs, PostgreSQL, Docker, AWS ✅ Experience building and improving production web applications ✅ Strong focus on clean architecture, performance, and maintainability I help startups and businesses build, improve, and maintain Ruby on Rails applications that are reliable, scalable, and ready for real-world use. My main focus is backend development with Ruby on Rails, including REST APIs, database design, background jobs, third-party integrations, bug fixing, refactoring, and performance optimization. I work on both new features and existing systems, always aiming for clean, maintainable solutions that support business growth. I’ve worked on production systems with high operational demands, including platforms that require solid backend workflows, job processing, monitoring, integrations, and stable deployments. What I can help you with: • Ruby on Rails backend development • REST API development and integrations • PostgreSQL design and query optimization • Background jobs with Sidekiq and async workflows • Refactoring legacy Rails applications • Performance optimization and bug fixing • Docker-based development and deployment environments • AWS and production support • RSpec testing and code quality improvements Tech stack: Ruby on Rails, Ruby, PostgreSQL, Sidekiq, Docker, Git, CI/CD, Linux, Amazon ECS, REST APIs, JavaScript I care about writing clean code, communicating clearly, and delivering work that is practical, stable, and useful for real business needs. Whether you need help building new backend features, improving an existing Rails app, integrating external services, or solving complex issues in production, I’m ready to help.

I am Ruby on Rails developer oriented to write pure and nice back-end code (i have over 9 years of experience). I like refactor existing code and writing tests. (I have experience with Capybara, RSpec) Also I have front-end skills in ReactJS, ReactNative, Javascript, JQuery, HTML, HAML, Twitter Bootstrap and CSS. In front-end offcourse my favourite part is programming in js.

I help startups and growing businesses build, improve, and scale modern SaaS and AI-powered applications from idea to production. With 10+ years of experience in full-stack development, I have built and maintained SaaS platforms, web applications, APIs, AI-powered solutions, and cloud infrastructure for startups across multiple industries. I work with clients who need a developer who can: • Build and launch SaaS products quickly • Develop scalable backend systems and modern frontends • Integrate APIs, payment systems, and AI services • Handle development, deployment, and cloud infrastructure end-to-end • Improve and scale existing applications without managing multiple freelancers ━━━━━━━━━━━━━━━━━━ WHAT I DO ━━━━━━━━━━━━━━━━━━ ✅ Full-Stack Development • Ruby on Rails, Node.js, React • JavaScript & TypeScript • Responsive web applications and dashboards • Frontend and backend architecture • Performance optimization and scalability ✅ SaaS Development • Multi-tenant SaaS applications • Subscription and Stripe billing systems • Admin panels and user management • API-first architecture • Production-ready application development ✅ AI & Automation • OpenAI and AI integrations • AI agents and intelligent assistants • Workflow automation and business process automation • Data processing pipelines and AI-powered features ✅ API Development & Integrations • REST APIs and third-party integrations • Payment gateway integrations • CRM integrations • External services and automation platforms • Secure and scalable API development ✅ Cloud & DevOps • AWS deployments and infrastructure • Docker and CI/CD pipelines • Production monitoring and debugging • Server optimization and scaling • PostgreSQL and MongoDB database management ━━━━━━━━━━━━━━━━━━ RECENT PROJECTS ━━━━━━━━━━━━━━━━━━ ✔ Built and scaled an EdTech SaaS platform serving thousands of active users ✔ Developed high-traffic API systems with reliable uptime and performance ✔ Built AI-powered workflows and automation solutions for business operations ✔ Implemented Docker and CI/CD pipelines to streamline deployments ✔ Developed backend systems and integrations for drone-related software platforms ━━━━━━━━━━━━━━━━━━ WHY CLIENTS WORK WITH ME ━━━━━━━━━━━━━━━━━━ ✔ Strong communication and regular updates ✔ Product-focused mindset and business understanding ✔ Clean, maintainable, and scalable code ✔ Ability to work independently and take ownership ✔ Long-term collaboration and reliable delivery I’m available for 5–8 hours per day, Monday to Thursday. If you're looking for a Full-Stack Developer who can combine Ruby on Rails, React, Node.js, AWS, and AI to build scalable products, feel free to send me a message or invite.

💼 Seasoned Full-Stack Developer | 🚀 Ruby on Rails Expert | 🤖 AI Developer & Automation | 🌟 Solution Architect With over 𝟓 𝐲𝐞𝐚𝐫𝐬 of experience in full-stack development, I specialize in transforming ideas into reality by developing high-quality web solutions. ✅ I have developed products used by leading companies such as 𝐀𝐩𝐩𝐥𝐞, 𝐀𝐦𝐚𝐳𝐨𝐧, 𝐌𝐢𝐜𝐫𝐨𝐬𝐨𝐟𝐭, 𝐔𝐛𝐞𝐫, 𝐏𝐞𝐩𝐬𝐢𝐜𝐨, 𝐍𝐞𝐭𝐟𝐥𝐢𝐱, 𝐇𝐚𝐫𝐯𝐚𝐫𝐝, 𝐒𝐭𝐚𝐧𝐟𝐨𝐫𝐝, 𝐍𝐁𝐂, 𝐁𝐁𝐂, 𝐂𝐍𝐍, 𝐃𝐞𝐥𝐨𝐢𝐭𝐭𝐞, and more. ✅ I possess strong experience in B2B SaaS, B2C SaaS, Gen AI, Fintech, Edtech, DTC/eCommerce, and marketing. 𝐄𝐧𝐡𝐚𝐧𝐜𝐞𝐝 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤: 🔧 Frameworks & Libraries – Ruby on Rails, React, Vue.js, Express.js, Bootstrap, Tailwind CSS 💻 Programming Languages – Ruby, JavaScript, TypeScript, SQL, HTML5, CSS3 ☁️ Tools & Platforms – Node.js, Shopify, AWS, Heroku, Docker, Git, GitHub, JIRA, Redis, GraphQL, Webpack 🗄️ Databases – PostgreSQL, MongoDB, MySQL, SQLite 🔍 Testing – RSpec, Capybara, Selenium, Jest, Mocha 🚀 DevOps & CI/CD – Jenkins, Kubernetes, Ansible, Terraform 𝐂𝐨𝐫𝐞 𝐂𝐨𝐦𝐩𝐞𝐭𝐞𝐧𝐜𝐢𝐞𝐬: 💻 Full-Stack Development – Expertise in both front-end and back-end, ensuring seamless integration and optimal performance. 🚀 Ruby on Rails – Extensive experience in building scalable and efficient web applications. 🛠️ Backend Technologies – Proficient in Node.js and Ruby, with expertise in designing RESTful APIs, managing databases, and optimizing performance. 🎨 Frontend Frameworks – Skilled in React, Vue.js, Angular, and Tailwind CSS to create intuitive and responsive UIs. ☁️ Cloud & DevOps – Strong knowledge of AWS, Heroku, Docker, and CI/CD pipelines for seamless deployment. 🗄️ Database Management – Experienced with PostgreSQL, MongoDB, and SQL for efficient data handling and storage. 🔌 API Integrations – Solid background in integrating third-party APIs to extend functionality. ✅ Automated Testing – Proficient in RSpec and Capybara to ensure the reliability and robustness of software. 𝐕𝐚𝐥𝐮𝐞 𝐏𝐫𝐨𝐩𝐨𝐬𝐢𝐭𝐢𝐨𝐧: I understand both technical and business needs, ensuring applications meet expectations. Here’s what I bring: 💡 Leveraging the latest technologies to build effective applications. 📈 Ensuring scalability, reliability, and seamless performance. 🖥️ Creating simple, user-friendly interfaces. 🤝 Collaborating effectively with teams, stakeholders, and clients to meet deadlines and budgets. 📚 Continuously learning to stay updated with industry trends. Let’s work together to turn your vision into reality and create something exceptional!

I am a professional web developer with over 10 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.

Welcome to my Upwork profile! With over 3 years of experience as a Full Stack Software Engineer, I'm passionate about crafting high-quality, scalable, and performance-driven web applications. My proficiency spans a wide range of technologies and services, making me your one-stop solution for your software development needs. My Expertise Includes: - Front-end Development: Responsive and Dynamic UI | JavaScript | React | Next.js | jQuery | Bootstrap | Tailwind | Material UI - Back-end Development: Ruby on Rails | Ruby | PHP | Laravel | server-side logic | REST APIs | 3rd party APIs integration - Database Mastery: SQL (MySQL, Postgres), NoSQL (MongoDB) | ORMs Eloquent, ActiveRecord, Mongoose - Server Deployment: AWS | ECS | Heroku | Cloudways - Content Management Systems: WordPress | Webflow Why Choose Me? Attention to Detail: I believe in delivering clean, maintainable code and thorough testing to guarantee your application's reliability. Problem-Solving: I enjoy tackling complex challenges, finding efficient solutions, and continually optimizing your application for better performance. Communication: Clear communication is key to a successful project. I'm responsive, proactive, and committed to keeping you informed at every stage. Ready to turn your ideas into a reality or optimize your existing project? Let's discuss your project requirements, and I'll tailor a solution that perfectly suits your needs. Feel free to reach out, and let's get started on your next software development journey.

TOP-RATED Ruby on Rails Developer | 7+ Years in Full-Stack RoR Development MAIN SKILLS: ✓ Expert web development with Ruby on Rails ✓ Experience in client-side scripting such as HTML, JavaScript, JQuery, CSS, Twitter-bootstrap ✓ Experience single page application with ReactJS, VueJS ✓ Experience in Relational DBMS such as Postgresql, MySQL ✓ Experience with e-commerce solutions (Shopify) ✓ Experience in OAuth Authentication (Facebook, Google, Twitter, LinkedIn) ✓ Strong knowledge of popular gems such as Devise, Cancancan, Rolify, Paperclip, etc ✓ Familiar with hosting services such as AWS, Heroku, EngineYard ✓ Experience in deployment scripts such as Capistrano, Mina ✓ In-depth git knowledge ✓ Experience in unit tests with Rspec If you're seeking a Ruby on Rails developer who is passionate about pushing boundaries and delivering excellence, let's connect. I am available for interviews, test projects, and demonstrations to showcase my proficiency in Ruby on Rails development. Your satisfaction is my utmost priority, and I am committed to exceeding your expectations.

I am a seasoned Ruby on Rails developer with a proven track record of crafting robust, scalable, and high-performance web applications. My expertise lies in leveraging the power of Ruby on Rails to build innovative solutions tailored to meet the unique needs of businesses. With a deep understanding of the Ruby on Rails framework, I excel in: ✅ Full-stack development: From database design to front-end development, I deliver comprehensive solutions ✅ Legacy system modernization: I breathe new life into outdated applications by upgrading to the latest Ruby and Rails versions ✅ API development: Building efficient and secure RESTful APIs for seamless integration ✅ Test-driven development (TDD): Writing clean, maintainable, and reliable code through rigorous testing ✅ Performance optimization: Identifying and eliminating bottlenecks to enhance application speed and responsiveness. 💡I am proficient in a wide range of Ruby on Rails tools and technologies, including RSpec, Capybara, PostgreSQL, Redis, Heroku, AWS, and Docker. My ability to quickly adapt to new technologies and challenges ensures that I deliver exceptional results on every project. 🟢Whether you need a new Ruby on Rails application from scratch or require expert maintenance and upgrades for an existing platform, I am your ideal partner. Let's collaborate to bring your vision to life! Keywords: Ruby on Rails, Ruby on Rails developer, Rails developer, Ruby developer, full-stack developer, web application development, API development, TDD, performance optimization, PostgreSQL, Redis, Heroku, AWS, Docker.