Hire the Best Ruby Developers & Programmers

👋 Hello, I’m Sanjeev. With 13+ years of experience, I help startups and established companies build reliable, fast, and user-friendly CRMs, enterprise solutions, and e-commerce platforms. 💻 Front-End Expertise Angular, React, Vue & Ember.js → portals, dashboards, and CRMs ⚙️ Back-End Systems Laravel, Node.js, Ruby on Rails, PHP 🏢 CRM Solutions Workflow automation, Client portals, Custom CRMs 🛒 E-Commerce Solutions Custom builds for WordPress, Shopify, and Magento 🤖 Automation & Integrations Third-party integrations, Chatbots, Reporting systems ✨ Why Clients Choose Me ✅ 165+ successfully completed projects ✅ 13,500+ Upwork hours ✅ 100% Job Success ✅ Top Rated Plus Long-term trust, reliable updates, and transparent communication 💬 What Clients Say “Provided a good solution ahead of schedule.” “One of the best independent contractors I’ve ever dealt with—a superb communicator and coder.” “Knowledgeable Ember.js developer, consistently delivers.” 👉 Please get in touch with me or schedule a meeting to talk about your project if you're searching for a trustworthy developer to realize your ideas. #FullStackDeveloper #Angular #EmberJS #Laravel #NodeJS #RubyOnRails #CRMDevelopment #EcommerceDevelopment #Shopify #Magento #WordPress #AIAssistedDevelopment #WebDevelopment #EnterpriseSolutions #APIIntegration #Automation - Ember.js Developers & Programmers - CRM Developers - E-commerce Developers - Drupal Developers - Adobe Commerce (Magento) Developers - Drupal Developers

Hi, I’m Zlata. I’m basically a typical American software developer... just living in Ukraine now. And I always work in the EST timezone. I’ll write everything in any tech stack you have 😄 I’m a Software Engineer with 8+ years of experience as a Ruby on Rails developer, React developer, Node.js developer, Python developer, and .NET developer. I work with Ruby on Rails, React, Node.js, Python, .NET, PostgreSQL, Docker, AWS, JavaScript, TypeScript, API development, API integration, and SaaS software development. I help companies build and improve SaaS platforms, ERP systems, CRM tools, dashboards, marketplaces, internal systems, API products, and complex web applications using Ruby on Rails, React, Node.js, Python, and .NET. My focus is clean product logic, stable delivery, scalable architecture, and software that stays easy to maintain as the business grows. 📊 My Achievements in Numbers: 🔶 Ruby on Rails Developer for a Construction Application Platform ▪ Helped build a Ruby on Rails + React platform for managing construction applications, reviews, documents, and stakeholder workflows. ▪ Reduced application review time by 42%. ▪ Supported 18,500+ construction applications processed in the first year. ▪ Helped the product reach $1.4M ARR within 14 months. ▪ Worked with Ruby on Rails, React, PostgreSQL, Docker, AWS, S3, and API integration. 🔶 React Developer for a Construction Materials ERP SaaS ▪ Helped improve a complex ERP SaaS platform for concrete, aggregates, and asphalt producers. ▪ Improved sales, pricing, and operational workflows through better product logic and scalable software architecture. ▪ 98% of demo users became clients after product improvements. ▪ 91% of users rated the interface as clear and intuitive. ▪ The product later raised $3.4M. ▪ Focused on React, Ruby on Rails, SaaS workflows, API development, and complex web application structure. 🔶 Node.js Developer for an Aviation Maintenance SaaS ▪ Helped improve a complex aviation maintenance SaaS product used by field teams. ▪ 96% of demo users became clients after the product improvements. ▪ 97% of field users adopted the product after the first try. ▪ Reduced user errors by 41% and made onboarding 62% faster. ▪ Supported product logic, API integration, dashboards, and connected SaaS workflows using Node.js, React, Ruby on Rails, and API development. 🔶 Python Developer for an AI Healthcare SaaS ▪ Supported an AI-powered healthcare platform that grew from a chatbot into multiple AI agents for clinics and hospitals. ▪ The product raised $20M+. ▪ Helped support workflows that increased patient visits by 31%. ▪ Helped reduce call abandonment by 98%. ▪ Worked with Python, API integration, automation workflows, AI-related product logic, and scalable SaaS architecture. 🔶 .NET Developer for a Utility Billing Platform ▪ Helped improve utility billing workflows for a SaaS platform processing complex customer, billing, and reporting data. ▪ Helped process $14M+ in utility bills within 6 months. ▪ Reduced billing cycle time from 9 days to 1.5 days. ▪ Supported 96% client retention through better product stability and workflow clarity. ▪ Worked with .NET, React, API development, reporting logic, SaaS architecture, and reliable software delivery. Why should you hire me as a Software Engineer? ▪ 8+ years of experience with Ruby on Rails, React, Node.js, Python, .NET, JavaScript, TypeScript, PostgreSQL, API development, API integration, and SaaS software development. ▪ 120+ successful projects delivered across B2B SaaS, ERP, CRM, healthcare, construction, logistics, fintech, aviation, and internal business platforms. ▪ Strong experience with Ruby on Rails, React, Node.js, Python, and .NET for SaaS products, dashboards, admin panels, API-first platforms, integrations, automation, AI features, and enterprise systems. ▪ I use Claude, Cursor, GitHub Copilot, and ChatGPT to speed up research, debugging, refactoring, and delivery. ▪ I work well with founders, CTOs, product managers, and teams that need clear communication across Ruby on Rails, React, Node.js, Python, and .NET products. What I can help you with: ✔️ Build or improve Ruby on Rails SaaS products ✔️ Create React dashboards, portals, admin panels, and SaaS interfaces ✔️ Build Node.js services and API integrations ✔️ Support Python automation, data workflows, and product logic ✔️ Work with .NET systems and connected software platforms ✔️ Build API-first products with Ruby on Rails, React, Node.js, Python, .NET, PostgreSQL, Docker, and AWS ✔️ Improve performance, stability, and maintainability of existing Ruby on Rails, React, Node.js, Python, and .NET applications ✔️ Support SaaS, ERP, CRM, fintech, healthcare, logistics, construction, and internal tools Need help with Ruby on Rails, React, Node.js, Python, .NET, API development, or SaaS development? Message me and let’s discuss your product. 📩🤝

Hello. I'm an AI engineer, full-stack iOS/Android/PHP/JavaScript/TypeScript/React/React Native developer and problem solver with more than 17 years of experience iOS/Android/PHP/JavaScript/TypeScript/React/React Native developer and problem solver with more than 17 years of experience. Specializing in MERN and LAMP stacks, artificial intelligence (AI). I embrace modern AI-powered development workflows using tools like 🤖 Claude Code, 🧠 Cursor and 🏄 Windsurf IDEs. What I do: 📱 Mobile apps, 🖥️ Desktop apps, 🌐 Websites, ⚙️ Web services, 👨🏻‍💻 Admin Backends, 🧩 API for them, 🤖 ChatGPT integrations. I embrace modern AI-powered development workflows using tools like 🧠 Cursor IDE and 🤖 Claude Code. Kinds of software I've created: 🛍️ Shopping & online stores, 🏃 Sports, 🎮 Games, 🧘 Medicine & well-being, ✈️ Travel, 💰 Bank systems, 📣 Ad networks, 🛡️ Insurance, 🛬 Landing pages. I have strong skills in the following programming languages: 📜 TypeScript, ☕ JavaScript, 🦅 Swift, 🎯 Objective-C, 🐘 PHP, 🐱 Kotlin, ☕ Java. Frameworks and technologies: 🦕 Deno & Node, ⚛️ React, ⚛️ React Native, 🤖 ChatGPT API, 🔮 Anthropic AI API, 🐻 Zustand, ⚛️ Electron, 🆁 Redux, 🆁 Redux Toolkit, 🐆 Nest js, 🅽 Next js, 🆅 Vue, 🐆 Fastify, 🥤 Fresh, 🅰 Apollo GraphQL Client and Server, 🔌 Relay, 🅼 MobX, 🌳 Koa, 🅴 Express js, 📈 GraphQL, 😎 Swagger, 💨 Tailwind, 🦅 SwiftUI, 🎥 Lottie Files, 🥤 Cocoa Touch, 🥥 Cocos2D, 🅻 Laravel, 🎵 Symfony, 🆈 YII and YII2, 🔥 CodeIgnitor, 🆉 Zend Framework, 📍 CoreLocation, 🎥 CoreAnimation, 🏠 Apple HomeKit, ❤️ Apple HealthKit, 💰 Superwall. Databases: 🍃 Mongo, 🐬 MySQL, 🪶 SQLite, 🍉 Watermelon DB, ⚡️ Supabase, 🔥 Firebase, 🐘 Postgres, 📄 TypeORM, ➡️ Doctrine, ⚪ DynamoDB/PartiQL, 🔴 Oracle, 🅲 CoreData, 🟣 Realm. Cloud Computing: 🐳 Docker, ☸️ Kubernetes, ☸️ Google Kubernetes Engine, 🌊 DigitalOcean Cloud, 🅷 Heroku, 🆁 Render, ☀️ Netlify, 🅰 Microsoft Azure, 🔺 AWS Lambda. I have developed over 20 iOS apps, 15 React Native apps, several Android apps, APIs for some of them, over 20 websites. I'm proficient in problem-solving and have solid track record of success in solving complex problems for teams that have struggled to do so on their own. I like to explore modern technologies, build amazing user interfaces, develop software of any complexity. I always strive to create apps and sites according to the best practices, thoroughly test them and provide the best user experience. It's important to me to write clean and readable source code which is easy to understand and maintain for any other developer.

Is your Ruby on Rails app slow, buggy, or stuck on a version you're afraid to upgrade? That's exactly what I fix. I'm a Senior Ruby on Rails Developer with 15 years of experience, $100K+ earned on Upwork, a 100% Job Success Score, and Top Rated status. I rescue, modernize, and scale Ruby on Rails applications — without breaking what already works. What I deliver for clients: - Rails version upgrades (Rails 4/5 to 6/7/8) with zero downtime and full test coverage — including legacy migrations like Paperclip to ActiveStorage - Performance optimization — up to 40% speed gains on production systems through query tuning, caching, and background jobs - Legacy & undocumented codebases stabilized by a senior hand, with RSpec/Capybara coverage so you can ship with confidence - SaaS backends from MVP to production-grade (Ruby on Rails, PostgreSQL, Sidekiq, Redis, Heroku, Docker) - Rails APIs integrated with React / Next.js frontends and third-party services (Stripe, PagerDuty, StatusPage, OpenAI) Proof it works: - Rebuilt StatusGator's Rails platform over 2 years — became their most prolific contributor (2,000+ hours, $60K+). "He ended up becoming the most prolific contributor to our project." — Colin B., StatusGator - Upgraded a client's app from Rails 4 + Paperclip to a modern stack — "Raza was great!" (5.0 stars) - 21+ completed jobs, the majority rated 5.0 stars, with repeat clients spanning 1,000+ hour engagements I work full-stack across Node.js, Next.js, and React when a project needs it — with the same clean architecture and testing discipline I bring to Rails. I communicate daily, write clean tested code, and treat your product like my own. Message me with your stack and what's broken — I'll tell you within 24 hours if I can help.

Are you looking for a highly experienced Ruby on Rails Developer to build robust, scalable, and high-performance web applications or enhance your existing systems? With 8+ years of dedicated experience in the Ruby on Rails ecosystem, I specialize in transforming complex ideas into elegant, efficient, and user-friendly digital products. My expertise lies in crafting clean, maintainable code that drives business value. I'm passionate about developing secure, test-driven applications, optimizing performance, and seamlessly integrating with third-party services. Whether you need a brand-new application from scratch, a major feature implementation, API development, or performance tuning for your existing RoR project, I bring a proactive, results-oriented approach. What I bring to your project: - Full-Stack RoR Development: From database design and backend logic (Ruby, Rails) to frontend integration (JavaScript frameworks, HTML, CSS/Sass). - Scalability & Performance Optimization: Identifying bottlenecks, refactoring code, and implementing caching strategies to ensure your application performs under heavy load. - API Development & Integration: Building secure and efficient RESTful APIs for mobile apps or external services, and integrating third-party APIs (payment gateways, CRMs, analytics). - Database Management: Proficient in PostgreSQL and MySQL, with strong skills in schema design, query optimization, and data migration. - Code Quality & Maintainability: Adhering to best practices, TDD/BDD (RSpec), and continuous integration to deliver reliable and easy-to-maintain codebases. - Problem-Solving & Debugging: A knack for quickly diagnosing and resolving complex technical challenges. My Toolkit Includes: Languages: Ruby, JavaScript (ES6+), HTML5, CSS3 Frameworks: Ruby on Rails, React.js / Vue.js / Stimulus.js (for frontend integration) Databases: PostgreSQL, MySQL, Redis Testing: RSpec, Capybara, FactoryBot Tools & Platforms: Git, GitHub/GitLab, Heroku, AWS (basics), Docker, Sidekiq, Webpacker I pride myself on clear communication, meeting deadlines, and delivering exceptional work that exceeds client expectations. Let's discuss your project and see how my Ruby on Rails expertise can help you achieve your goals. Ready to build something great together? Feel free to invite me to your job or schedule a call.

I'm a Full Stack Developer React Node, Full Stack SaaS Developer, and Node.js Developer with 15 years of experience in SaaS platforms, CRM systems, and scalable Web Application development from MVP to production launch. 100% Job Success | 125+ projects delivered | 50+ SaaS Platforms | 10K+ users | 300K+ API/month As a Full Stack Developer React Node, Full Stack node.js react developer, and Full Stack SaaS Developer, I can support you with: ✔️ SaaS MVP development in 4–6 weeks ✔️ AI-powered SaaS Development ✔️ Multi-tenant SaaS platforms, Booking platforms, B2B / B2C Marketplaces, Management platforms, AI automation, and mobile apps ✔️ Software Development and Full-Stack Development of admin panels, admin dashboard development, and analytics dashboards ✔️ Web Development with real-time features on a MERN Stack as a MERN Stack developer ✔️ Full Stack Web Developer delivery for SaaS products, Web Application projects, billing, subscription logic, and payment flows ✔️ Full Stack SaaS developer, SaaS Platform Developer, and Full Stack developer SaaS delivery 🤖 AI-powered SaaS and AI Automation: ✔️ AI workflows for SaaS and business platforms with 10K+ user requests and thousands of automated interactions ✔️ AI Chatbot, AI Agent Development, AI Model Integration, LLM, LangChain, RAG, and Python ✔️ Artificial Intelligence, AI Development, and AI App Development across 35+ AI-powered projects ✔️ Full Stack Developer React Node, Full Stack AI Engineer, and AI Developer delivery with response time reduced from minutes to seconds ✔️ AI-first approach using Cursor, Claude Code, Codex, and Lovable for up to 30% faster development as a Full Stack SaaS Developer ⚛️ As a Frontend React developer and Front End developer React, I built 70+ frontend projects with React, Next.js, JavaScript, HTML, HTML5, CSS, CSS 3, Tailwind CSS, Shadcn/ui, Redux, App Router, Bootstrap, jQuery, Front-End Development Framework, Vue.js, and Angular. Where as a React developer, Next.js Developer, and javascript developer experience helped improve page load speed by 35–55%. 🧩 Backend development as Node.js Developer and Node.js backend developer for 80+ backend systems: APIs, database logic, and backend architecture with Node.js, TypeScript, ExpressJS, NestJS Development, NodeJS Framework, Supabase, Prisma, RLS, node.js graphql, and Back-End Development Framework. Backend developer and NestJS developer experience across 120+ API endpoints, 500K+ records, and 3–5x faster database/API response. 🔌 As a senior Full Stack Developer React Node, I handle API Integration and API Development for 300K+ API/month workloads with RESTful API, third-party REST API, webhooks, OpenAI API, Stripe API, Twilio API, Claude API, ChatGPT API, WhatsApp business API, and various Google APIs. ☁️ As a Full Stack Developer React Node and Node.js Developer, I design production database architecture with Database Architecture, Database Design, Data Security, scalable architecture, MySQL, PostgreSQL, MongoDB, SQL, Firebase Auth, and Firestore to support production systems with 99.9% uptime. I handle cloud deployment, CI/CD, and production deployment with Git, GitHub, Docker, Vercel, Railway, Amazon Web Services, AWS S3, AWS Lambda, Google Cloud Platform, Microsoft Azure, DigitalOcean, and Kubernetes to make releases 30–40% faster and reduce deployment failures by 30–40%. 💪 As CTO at Malevich Studio, I can also help you cover: ✔️ Code audit, Software Architecture & Design, production delivery, debugging, and production bug fixing. ✔️ Mobile App Development: 25+ mobile apps from mobile app design to iOS and Android App Development, built on React Native with push notifications. Can cover React Native developer, Mobile App developer, and flutter developer positions. ✔️ UX & UI / Web Design: UX Designer support with Figma, Responsive Design, Adaptive Web Design, Software Design, Graphic Design, and Adobe Photoshop for 25–40% conversion improvement ✔️ CMS and WordPress support: WordPress developer, cms developer, PHP, for mobile friendly website support ✔️ Legacy Web Development: Java, Python developer, Ruby on rails, and Full Stack developer Laravel Vue ✔️ Product infrastructure and access workflows: User Authentication, user management systems, communications workflows, and business operations workflows for 10K+ users. 🏢 Industry and niche experience: Hospitality, Travel, Healthcare (HIPAA compliance), E-commerce, FinTech, Logistics, Finance, Education, E-learning, Retail, HR, Business Services, Fashion, Beauty, Media & Entertainment, AI, SaaS marketing, Real Estate platform, etc. 🚀 Click “Invite” if you need a Full Stack Developer React Node, Full Stack SaaS Developer, or Node.js Developer.