Struggling to scale your web application, integrate complex APIs, or build a reliable SaaS product? I help businesses build fast, scalable, and secure web applications using Ruby on Rails, React, and AWS. I'm a Full-Stack Web Developer with 7+ years of experience building production systems for startups and growing companies. I specialize in Ruby on Rails backend development, API integrations, SaaS platforms, and scalable cloud infrastructure. Over the years I have helped clients: ✔ Build and scale production SaaS platforms used by thousands of users ✔ Integrate 20+ third-party APIs including Stripe, PayPal, Twilio, Plaid, Google Maps, and many global payment systems ✔ Develop high-performance e-commerce and booking platforms ✔ Deploy reliable cloud infrastructure using AWS, Docker, and VPS environments ✔ Improve development speed and product quality using modern tooling and AI-assisted workflows What I Can Help You With Backend Development - Ruby on Rails (Rails 3.x – 8.x) - REST APIs & microservices - Authentication systems (Devise, Authlogic) - Supabase and Firebase - Scalable database design Frontend Development - React.js, Redux - Vue.js, jQuery - Responsive UI (Tailwind, Bootstrap, Semantic UI) API Integrations - Payment gateways: Stripe, PayPal, Klarna, Bread - Financial APIs: Plaid, Dwolla, CommerzBank - Messaging: Twilio - Maps & location: Google Maps, Leaflet - Automation tools: Zapier, Playwright - Many other custom APIs Infrastructure & DevOps - AWS (EC2, S3, RDS, SES, Lambda, Route53) - Docker containerization - Deployment with Capistrano & Mina - VPS environments (AWS, DigitalOcean, Vultr) - Hosting with Netlify & Vercel Performance & Search - Elasticsearch - Solr - Algolia Search Background Processing - Sidekiq - Resque - Redis - DelayedJob - ActiveJob Databases - PostgreSQL - MySQL - SQLite - MongoDB Technologies I Work With - Ruby • Ruby on Rails • React • Vue • Java • Python • Rust • Go • Haskell • PHP - PostgreSQL • MySQL • MongoDB • SQLite - Docker • AWS • Git - Tailwind CSS • Bootstrap • Webpack • Semantic UI I also actively use AI development tools like GitHub Copilot, Cursor, and Claude Code to improve development speed while maintaining high code quality. How I Work 1️⃣ Understand your product and business goals 2️⃣ Design scalable architecture 3️⃣ Deliver clean, tested, maintainable code 4️⃣ Communicate clearly throughout development Clients appreciate that I dig deep into problems and deliver reliable solutions rather than quick hacks. Why Clients Work With Me ✔ 7+ years of professional development experience ✔ 100% Job Success Score on Upwork ✔ Strong experience with complex API integrations ✔ Reliable communication and long-term collaboration mindset 📩 If you’re building or improving a SaaS product, web platform, or API-driven application, feel free to invite me to your job or send a message. I’d be happy to discuss your project.

I am a full-stack developer with over 5 years of experience, specializing in backend and server-side rendering. I have worked extensively with Express, NestJS, Ruby on Rails, React, and Next.js. I am passionate about building scalable Node.js applications, optimizing code, improving SQL performance, and exploring new technologies to deliver the best solutions to my clients. What I Can Do for You: • Develop full-stack web applications with robust backend logic and clean frontend interfaces • Integrate third-party services to retrieve and process data • Implement secure and scalable authentication methods • Design and manage role-based access control for web applications • Work with AWS, Docker, and deploy Node.js applications on VPS • Automate tasks like importing/exporting CSV files and sending transactional emails • Write unit tests to ensure code reliability • Apply AI solutions to optimize workflows Why Work with Me? • I deliver high-quality, maintainable code that is easy to extend • I help you save time and costs by efficiently completing tasks • I stay updated with the latest technologies to ensure your project is future-proof I am also adaptable to different project management methodologies, including Scrum, Waterfall, and Agile. Let’s discuss your project and find the best solution together!

I am an ambitious, self-motivated individual with a client-focused approach, looking for a workplace that nurtures creativity, has a great work culture, and passion for technology, and promotes growth with many learning opportunities. I look forward to leveraging my current knowledge with a background in software development to create innovative solutions which would enable me to make a positive impact on the organization and myself.

SaaS companies and startups hire me when they need a Rails developer who ships clean, reliable code and actually communicates. I'm a Full-Stack Developer specializing in Ruby on Rails + React/Vue, with 5+ years building and scaling SaaS products, API platforms, and internal tools. Whether you need a new feature shipped, a slow query fixed, or a legacy codebase modernized, I'll find the fastest, safest path and keep you in the loop the whole way. What I do best: Ruby on Rails: new features, refactors, version upgrades, background jobs (Sidekiq), multi-tenant architecture API integrations: REST APIs, webhooks, payment gateways (Stripe, Braintree), OAuth/auth flows Frontend: React, Vue, Stimulus, Tailwind CSS (clean UI, smooth UX — no half-finished interfaces) Performance: query optimization, Redis caching, N+1 fixes, profiling slow endpoints Testing & quality: RSpec, Capybara, TDD/BDD, maintainable architecture you won't dread inheriting Security: Brakeman audits, secure coding patterns, fixing common vulnerability classes Delivery: Docker, Heroku, AWS, DigitalOcean, GitHub Actions CI/CD Tech Stack: Rails · Node.js · React · Vue · PostgreSQL · Redis · Docker · AWS How I work: Clear scope → practical milestones → frequent updates → clean, documented code. No surprises. 📩 Tell me what you're building (or what's broken), and I'll tell you exactly how I'd approach it.

If you are creating an Internet server with many tables, such as a hundred tables in a database, you are building it wrong. I'm building a Facebook TAO database architecture API using Python, Ruby on Rails, MongoDB, and Redis on GitHub. Python, Ruby and Elixir will build a top-notch web service to defeat your competitors with excellent performance on a large scale. I was the CEO and founder, speaking English fluently. I think out of the box to help you build a perfect website architecture like Facebook, Twitter, and Linkedin from scratch by using TAO: Facebook’s distributed data store to get the excellent performance and user experience. 𝗪𝗵𝘆 𝘀𝗵𝗼𝘂𝗹𝗱 𝘆𝗼𝘂 𝗰𝗵𝗼𝗼𝘀𝗲 𝗺𝗲? - Founder for 7 years in my startup social eCommerce and software company to work for Americans using Ruby on Rails, built the demo, code, pitch deck, and business plan. - Research Facebook's design, technology, TAO Facebook graph database architecture - Worked for Japanese and Singaporean companies in Vietnam as a web engineer - Senior full-stack developer, leader, architect, engineering manager with 14 years of experience in website development - Bachelor's degree from Vietnam National University, fluent in English. - Define new Dualism in philosophy and Atomic International Pronunciation AIP in linguistics 𝗛𝗼𝘄 𝗶𝘁 𝘄𝗼𝗿𝗸𝘀 - Use the front end, back end, and microservices architectures to update the latest versions and new technologies easily and quickly, improve high-quality - Write all test scripts - Write clean, secure, efficient, maintainable code - Analysis design deployment maintenance - Confidentiality How can I help you take a step in the right direction? 𝐃𝐞𝐯𝐢𝐜𝐞 iMac M4, 24GB memory 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 - Python - Elixir - Phoenix Web Framework - Ruby, Rails API 7 years - Restful API - JRuby 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 - React, Recoil - Create React App - JavaScript - Tailwind CSS - Bootstrap 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲 - NoSQL MongoDB - SQL PostgreSQL MySQL - Elasticsearch - Redis 𝗧𝗲𝘀𝘁 - RSpec - Jest - Enzyme - Test-Driven Development TDD - Behavior Driven Development BDD 𝗕𝗶𝗴 𝗗𝗮𝘁𝗮 - Apache Hadoop 𝗧𝘆𝗽𝗲 𝗖𝗵𝗲𝗰𝗸𝗲𝗿 - TypeScript - Sorbet 𝗢𝗽𝗲𝗿𝗮𝘁𝗶𝗻𝗴 𝗦𝘆𝘀𝘁𝗲𝗺 - Ubuntu 𝗧𝗼𝗼𝗹 - Github - AWS - Heroku 𝗔𝗴𝗶𝗹𝗲 - Scrum 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 - Social networks - ECommerce - Live chat - Elearning - Travel - Real estate - Quality Assurance (QA) - Project Management - Fintech - Finance - Live video streaming - Healthcare - Game - Cryptography

𝙔𝙤𝙪𝙧 𝙫𝙞𝙨𝙞𝙤𝙣. 𝙈𝙮 𝙚𝙭𝙚𝙘𝙪𝙩𝙞𝙤𝙣. 𝙋𝙚𝙧𝙛𝙚𝙘𝙩 𝙧𝙚𝙨𝙪𝙡𝙩𝙨. Hi, I’m 𝐓𝐚𝐥𝐡𝐚, a Senior Full Stack Developer with over 6 years of experience building scalable, high-performance applications. I specialize in 𝐑𝐮𝐛𝐲 𝐨𝐧 𝐑𝐚𝐢𝐥𝐬, 𝐑𝐞𝐚𝐜𝐭.𝐣𝐬, 𝐚𝐧𝐝 𝐃𝐞𝐯𝐎𝐩𝐬 practices, helping businesses bring their ideas to life with clean, maintainable, and reliable code. 𝑪𝒐𝒓𝒆 𝑬𝒙𝒑𝒆𝒓𝒕𝒊𝒔𝒆 -Backend: Ruby on Rails (4.x/5.x/6.x/7.x), RESTful APIs, GraphQL -Frontend: React.js, JavaScript, jQuery, HTML5, CSS3, Bootstrap -Databases: PostgreSQL, MySQL, Redis -Automation & Testing: RSpec, Capybara, Cucumber, FactoryBot 𝑫𝒆𝒗𝑶𝒑𝒔: -CI/CD with GitHub Actions, GitLab CI, Jenkins -Infrastructure provisioning with Docker, Docker Compose, and Terraform -Deployment & server management using Heroku, AWS (EC2, S3, RDS, CloudWatch) -Monitoring & Logging: New Relic, Sentry, Loggly 𝑶𝒕𝒉𝒆𝒓 𝑺𝒌𝒊𝒍𝒍𝒔: -Test-Driven and Behavior-Driven Development (TDD/BDD) -API Integration (Stripe, Twilio, SendGrid, etc.) -Agile/Scrum methodology -Code optimization and performance tuning 𝑾𝒉𝒚 𝑾𝒐𝒓𝒌 𝑾𝒊𝒕𝒉 𝑴𝒆? ✔ Deep understanding of full software lifecycle ✔ Clean, maintainable, and well-documented code ✔ Transparent and proactive communication ✔ Proven ability to work independently or within a team ✔ Focus on long-term scalability and performance ✔ Strong DevOps knowledge for end-to-end delivery 𝑹𝒆𝒄𝒆𝒏𝒕 𝑷𝒓𝒐𝒋𝒆𝒄𝒕𝒔 -AudioSocket – Audio platform optimization with custom Rails plugins -Canopy Analytics – Scalable React + Rails analytics dashboard -LIMPAR – E-commerce platform with integrated DevOps pipelines for auto-deployments 𝑳𝒆𝒕’𝒔 𝑪𝒐𝒍𝒍𝒂𝒃𝒐𝒓𝒂𝒕𝒆 Whether you’re building an app from scratch, refactoring legacy code, or automating your deployment pipeline, I’m ready to help. Let’s build something fast, secure, and future-proof—together.

Hello and welcome to my profile! I'm a Ruby on Rails back-end software engineer with more than 13 years of experience and almost 14.000 hours of proven track record here on Upwork. I'm in love with Ruby programming language and I'm very passionate when working. 💡My key skills are💡: Backend: ✅ Ruby on Rails ✅ MySQL, PostgreSQL, MongoDB ✅ RESTful APIs ✅ JSON API serializer, Rswag ✅ Prawn Frontend: ✅ jQuery ✅ Underscore.js ✅ Stimulus.js ✅ turbo_frame ✅ AJAX ✅ CSS/ CSS3 ✅ HTML/HTML5 ✅ Bootstrap 5.3.0 ✅ Zurb Foundation I'm skilled in test writing: ✅ Rspec, Cucumber, Capybara I am familiar with: ✅ AWS deploy ✅ Heroku deploy ✅ Capistrano I have worked a lot with 3rd party API integration (social networks, Google maps, mailing services, payments, video hosting) If you have an idea and need to implement it, then feel free to contact me and we'll discuss. I can build any product you want, either small Ruby script or complex Web application.

🏅 Upwork Top Rated Backend Developer 🏆 Built High-Performance, Award-Winning Platforms ✔️ 100% Job Success Score ⭐️ Always 5-Star Feedback 👋 Responsive Communication & Agile Methodologies Senior Ruby on Rails engineer with 10+ years of experience building, scaling, and maintaining production systems. I specialize in long-term ownership, performance optimization, background processing, and AWS-based deployments. I work best with teams that need a reliable engineer to take responsibility for the backend. 🔰 𝗟𝗮𝗻𝗴𝘂𝗮𝗴𝗲𝘀, 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀, 𝗠𝗲𝘁𝗵𝗼𝗱𝗼𝗹𝗼𝗴𝗶𝗲𝘀, 𝗮𝗻𝗱 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 ----------------------------------------------------------------------------------- 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐂𝐥𝐨𝐮𝐝 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 Languages: Ruby, Elixir, JavaScript (ES6+), Python Frameworks: Ruby on Rails, Phoenix, Node.js (Express.js) Databases: PostgreSQL, MySQL, MongoDB Caching & Messaging: Redis, Sidekiq, RabbitMQ DevOps & Cloud: AWS (S3, EC2, Lambda, CloudFront), Docker, Kubernetes Architecture: Microservices, REST APIs, LiveViews Payment Systems: Stripe, PayPal CI/CD & Automation: GitHub Actions, Capistrano 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 & 𝐒𝐏𝐀 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 Frameworks: React.js, Redux, Angular Core Web: HTML5, CSS3, JavaScript (ES6+), Bootstrap, jQuery, AJAX UI Frameworks: Material UI, Responsive Design, WCAG Accessibility Performance: Code-splitting, Lazy Loading, Lighthouse Optimization Tooling: Webpack, Babel, ESLint 𝐓𝐨𝐨𝐥𝐬 & 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 Version Control: GitHub, Bitbucket Operating Systems: Ubuntu, Linux, macOS Agile & PM Tools: Jira, Trello, Asana Collaboration: Slack, Skype Documentation: Swagger/OpenAPI 🔰 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝘀: ------------------------------------ 𝐌𝐢𝐥𝐚𝐚𝐩 – Led the build of the world’s #1 crowdfunding platform using RoR, Postgre, Redis, and AWS. Implemented high availability clustering, database replication, and load balancing to handle millions of users without downtime. 𝐀𝐩𝐩𝐖𝐨𝐫𝐤𝐂𝐨 – Directed a 30+ engineer team to deliver a cloud native, microservices based SaaS using Elixir/Phoenix, React, RabbitMQ, and Docker on AWS. Built real time task orchestration, role based permissions, and multi tenant data isolation for property management. 𝐃𝐌𝐀𝐑𝐂 𝐑𝐞𝐩𝐨𝐫𝐭𝐢𝐧𝐠 𝐒𝐮𝐢𝐭𝐞 – Architected a multi-tenant compliance platform with Ruby on Rails, Sidekiq, PostgreSQL, and AWS Lambda. Automated DNS record parsing, large scale email authentication monitoring, and secure enterprise API integrations. 𝐒𝐤𝐞𝐜𝐡𝐞𝐫𝐬 𝐄-𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞 – Contributed to a global retail platform built with Node, React, and MySQL. Optimized product catalog queries, integrated Stripe and PayPal gateways, and improved checkout performance for international users. 𝐖𝐨𝐯𝐞𝐧 𝐇𝐞𝐚𝐥𝐭𝐡 𝐂𝐨𝐥𝐥𝐞𝐜𝐭𝐢𝐯𝐞 – Delivered a responsive, SEO optimized site using React, Material UI, and AWS S3 hosting. Created a modular CMS driven architecture for easy content management and fast load times. 📌 𝐏𝐢𝐧𝐠 𝐦𝐞 𝐧𝐨𝐰 𝐭𝐨 𝐞𝐥𝐞𝐯𝐚𝐭𝐞 𝐲𝐨𝐮𝐫 𝐛𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐭𝐨 𝐭𝐡𝐞 𝐧𝐞𝐱𝐭 𝐥𝐞𝐯𝐞𝐥!

I design and build backend systems, REST APIs, and Chrome extensions that are reliable, tested, and built to last. Over 7 years I've shipped production web applications across Python, Ruby on Rails, PHP/Laravel, and Vue.js — from database design to deployment. At Sage Group, I maintained consistently greater than 95% test coverage while building web automation features used by 4M+ entities. At HalSimplify, I designed inventory and coupon management modules from scratch, including a live zero-downtime migration between valuation methods. At MediaVak, I owned full delivery cycles solo — system design, Flask/Python backend, and a Vue.js/D3.js frontend. Backend & API work: * REST API design & backend architecture (Flask, Rails, Laravel) * Relational database modelling (PostgreSQL, MySQL) and clean data migrations * Strong automated testing discipline (RSpec, pytest) — I don't ship without coverage

I’m a Senior Full-Stack Developer with 9+ years of experience, specializing in Ruby on Rails and modern frontend frameworks like React, Next.js, Vue.js, and Nuxt.js. Over the years, I’ve helped startups and established businesses build scalable, high-performance web applications that drive real results. 🔹 Backend Expertise: Ruby on Rails, AWS Lambda, Python, PHP. NodeJs 🔹 Frontend Expertise: React, Next.js, Vue.js, Nuxt.js, HTML, CSS 🔹 Cloud & DevOps: AWS services, REST APIs, integrations, deployment pipelines What sets me apart: ✔️ 9+ years of professional software development experience. ✔️ Full-stack expertise (frontend + backend + cloud). ✔️ Clean, maintainable, and well-documented code. ✔️ Strong communication and reliable delivery. I’m the right fit if you need someone who can quickly understand requirements, suggest the best technical approach, and deliver reliable solutions—even in small, steady work windows. 💬 Let’s connect and discuss how I can help bring your project to life!