I build ERPs, SaaS platforms, and AI automations that replace manual work. My stack: Ruby on Rails, Next.js, Supabase, and n8n. Quotation systems, invoice parsing, AI email agents, ERP modules. All shipped in production. What I build: - Full stack web apps: Ruby on Rails, Next.js, React, PostgreSQL, Supabase, Sidekiq, Redis, Stripe. Clean code the next developer can read. - AI automation: n8n workflows, API integrations, LLM pipelines, RAG systems, CRM syncing. If your team does something manually every day, I can make it run itself. - ERP and SaaS systems: product configuration, quoting, order management, multi-tenant platforms for manufacturing and operations. Proof: - 20 years building web systems. 17 on Ruby on Rails. - Maintained a Rails + React ERP for a Canadian lighting manufacturer for 7 years. Quoting, orders, dashboards, used in production every day. - Built a donor platform that processed over $1B in transactions. - EzyOps.ai: restaurant operations platform running 100+ n8n agentic workflows. How I work: I respond fast, I communicate clearly, and I finish what I start. I work in your timezone. I use AI-first development workflows, so I ship faster than my rate suggests. Tell me what you need and I will tell you straight if I am the right fit.

TOP RATED ✅ | 100% Job Success ✅ With over 6 years of hands-on experience in Ruby on Rails(ROR), modern JavaScript frameworks like ReactJS, and cross-platform mobile development with React Native. My work has directly contributed to increasing end-user engagement by 30–40% and has helped clients grow their profits exponentially through performance-driven development and user-focused design. I've built and scaled a wide range of web and mobile applications; many for fast-growing, venture-backed startups. Whether building from scratch or optimizing existing platforms, I bring a product-oriented mindset and a proven track record of delivering high-impact results. In recent years, I've embraced an AI-first engineering approach, leveraging tools like OpenAI, Anthropic, and Gemini not just as integrations, but as force multipliers in the development process itself. I work daily with Claude Code, OpenAI Codex, Cursor, and Lovable to compress weeks of work into days; one recent example is a 6,000+ line architectural refactor I shipped in two days using Claude Code, without compromising on code quality or test coverage. This is what allows me to help clients validate ideas faster, ship features sooner, and ultimately land more business. I've practiced all the software engineering principles and technologies needed to create reliable and maintainable production-ready web and mobile applications from scratch. 🚀 You have an idea for your MVP web or mobile app? Let's talk and give me a trial to help you to build it. 🐛 Do you have a bug that needs to be fixed ASAP? Let me take care of it, and if I can't resolve it, there will be NO CHARGE. 🌟 You want to scrape a site for analysis and comparison? 📱 Want a cross-platform mobile app built with React Native that ships to both iOS and Android from a single codebase? 🤖 Want to build AI-powered features into your product? I've shipped production AI features for real clients and know how to do it fast. 🕹️ Need an extra main player in your team to add new features? I'm here to help you. Primary expertise is below: Programming language: Ruby, JavaScript, TypeScript, Python, C, C++, Shell script Ruby-Based frameworks: Ruby on Rails(v5, 6, 7, 8), Sinatra Ruby gems: ActiveAdmin/Avo, Resque, ruby-llm, solid-queue, RSpec, Kamal Database: PostgreSQL, MySQL, MongoDB, Redis. AI Tools & Integrations: OpenAI GPT-4o, Anthropic Claude, Google Gemini, AI-assisted development workflows (compound engineering) AI-Assisted Dev Tools: Claude Code, OpenAI Codex, Cursor, Cline, Lovable — used daily to ship faster without cutting corners on quality Mobile: React Native (iOS + Android), Expo Other Frameworks/Tools: ReactJS, Next.js, Django, Shopify, Elastic search, Beautiful Soup, JIRA, Heroku, AWS, Trello. I provide the following services: - Full Stack Web and Mobile app development, optimization, and third-party integrations - Cross-platform mobile app development using React Native and Expo for iOS and Android - Development of API clients, bots, various tools, and libraries - Rapid AI-assisted prototyping using compound engineering workflows with Claude Code, Codex, and Lovable to ship MVPs and new features 3–5x faster than traditional timelines - Create components consistent with every other application layer - Set up and deploy development (staging), QA, and production environments. - Able to resolve issues in the application of any layer, allowing a project to not seek or wait for another narrowly specialized developer. In other words, I can maximize overall project development performance by having enough horizon and insight to think of it systematically. - Web Scraping for gathering, analyzing, and utilizing data to gain a competitive advantage I'm ready for any demo or evaluation work based on our next steps. 🚀 Let's collaborate and create something truly transformative! ✨

Expert Ruby on Rails and ReactJd developer with Heroku. Over 11+ years experience in developing web applications in different domains. My core competency is to be able to jump into any phase of the project lifecycle with full efficiency. Worked well on projects with a team of 1-12 members as well as single-handedly built projects from scratch to the production/maintenance stage. Full stack developer with backend, frontend, and server management skills. Skills:- - Ruby on Rails, Ruby - Heroku - JavaScript, jQuery, React.js,node.js, backbone.js, d3.js - Mysql, PostgreSQL, neo4j, MongoDB - HTML5, CSS3, HAML, SASS - RSpec, Cucumber, Selenium, Capybara - Amazon Web Services, Heroku - Github, SVN Trello, Asana, Pivotal - Tracker Adobe Photoshop, Adobe Illustrator - API Integration (Facebook, Twitter, Instagram, Salesforce, Google Services, and any third party service) - SDK development, API development - Any work Related for Full-Stack Ruby on Rails & JS Related Framework(React-Angular) Feel free to contact me! I am very happy Helped and work with you. Best Regards, Mohan

I’m a software developer with 5+ years of experience working for several kinds of industries. I currently work with Ruby on Rails Stack and related technologies building business web applications or products.

I am a Ruby on Rails developer with a Bachelor of Computer Application from Gujarat University and have 9+ years of web application development experience.

Name: Hien Nguyen Sex: Male Nationality: Vietnamese Years of Experience: - 7+ years of experience in programming with Ruby on Rails, Rspec, sidekiq, redis, AWS - 10 years of experience in programming with C#, ASP .NET languages. - Familiar with AWS, Google, Azure clouds, stripe, paypal payment platform.

🚀 Ruby on Rails Expert with 8+ Years of Experience Are you looking for a seasoned Ruby on Rails developer to bring your web application to life? Look no further! With over 8 years of hands-on experience in the Ruby on Rails ecosystem, I'm ready to help you turn your ideas into scalable, robust, and efficient web applications. 🚀 You have an idea for your MVP app ? Let's talk and give me trial for help you to build it. 🐛 Do you a bug and need to fixed ASAP ? Let me take care of it, and if I can't resolve it, there will be NO CHARGE. 🕹️ Need extra main player in your team to adding new features ? I'm here to help you. Front End : - Stimulus JS - JQuery - HTML / HAML - CSS, - Twitter Bootstrap - Hotwire - Webpacker - Importmap Back End : Ruby on Rails (Version 3 to 7) Ruby on Rails API (Version 3 to 7) Database : PostgreSQL, MongoDB, MySQL, Firebase

👋 Hello! I am a highly experienced Ruby / Ruby on Rails developer with a strong focus on writing clean and efficient code. I bring a wealth of expertise to the table. If you are searching for an employee who perfectly matches my skill set, look no further. I am here to provide comprehensive solutions tailored to your specific workflow needs and help you integrate them with the latest technologies to boost your business productivity. I primarily work with the following technologies: ✅ Ruby / Ruby on Rails ✅ TDD with RSpec, Minitest ✅ SQL (PostgreSQL, MySQL) ✅ JavaScript / React, Stimulus, jQuery ✅ HTML / CSS / Bootstrap ✅ REST, GraphQL APIs ✅ Git ✅ Linux ✅ Docker, Kubernetes ✅ Flutter I strive to think of the bigger picture when starting with a project or developing new features, and I improve my knowledge of new technologies, languages and frameworks all the time. I am always happy to discuss your project and provide high quality of work.

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. 📩🤝

Are you looking for a highly skilled Ruby on Rails developer who can build, scale, and optimize your web applications? I help businesses turn their ideas into powerful, secure, and high-performance software solutions — on time and within budget. 💡 What I Do Best ✅ Full-Stack Development — Ruby on Rails, RESTful APIs ✅ Frontend Expertise — Reactjs, Vuejs, Nextjs, CoffeeScript, Hotwire Stimulus ✅ Database & Storage — PostgreSQL, MySQL, MongoDB, SQLite, Redis ✅ Automated Testing — RSpec, Cucumber, Capybara ✅ Search Optimization — ElasticSearch Integration ✅ Payment Systems — Stripe, PayPal, Square ✅ Cloud & Deployment — AWS (S3, EC2, RDS), Docker, Heroku, DigitalOcean ✅ API Development & Integration — RESTful API, Third-Party Services 🔹 Why Clients Hire Me 8+ years of experience building high-quality Ruby on Rails applications Proven track record of delivering scalable, optimized solutions Excellent at problem-solving and debugging complex systems Strong communication, transparency, and on-time delivery 📌 Tools & Platforms I Work With Project Management: Jira, Trello, Monday, Pivotal Tracker Cloud & DevOps: AWS, Docker, DigitalOcean, Heroku Analytics & Tracking: Google Analytics Let's dive into a discussion,reach out and let's make I.T happen!"