𝐀𝐈 𝐒𝐚𝐚𝐒 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 | 𝐑𝐞𝐚𝐜𝐭, 𝐍𝐞𝐱𝐭.𝐣𝐬, 𝐍𝐨𝐝𝐞.𝐣𝐬 & 𝐑𝐚𝐢𝐥𝐬 | 𝐒𝐭𝐚𝐛𝐢𝐥𝐢𝐳𝐞 & 𝐒𝐜𝐚𝐥𝐞 With 12+ years of experience building, scaling, and optimizing SaaS products, I help startups and growing companies transform ideas into high-performance, revenue-generating applications. From MVP development to enterprise-scale platforms, I bring a product-focused engineering approach that prioritizes performance, reliability, maintainability, and business outcomes. 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 ✓ AI-Powered SaaS Applications & LLM Integrations ✓ React.js, Next.js, TypeScript & Modern JavaScript ✓ Node.js, Express.js & Backend Architecture ✓ Ruby on Rails Development & Modernization ✓ REST APIs, GraphQL & Third-Party Integrations ✓ PostgreSQL, MySQL, MongoDB & Database Optimization ✓ SaaS Architecture, Multi-Tenant Systems & Subscription Platforms ✓ Authentication, Authorization & Security Best Practices ✓ Performance Optimization, Debugging & System Stabilization ✓ Cloud Infrastructure, CI/CD & DevOps Workflows ✓ Technical Leadership, Code Reviews & Team Mentorship ✓ Product Development from Concept to Production 𝐖𝐡𝐚𝐭 𝐈 𝐃𝐞𝐥𝐢𝐯𝐞𝐫 • Scalable SaaS platforms built for long-term growth • Clean, maintainable, and production-ready codebases • High-performance web applications with exceptional user experiences • Robust backend systems capable of handling increasing traffic and demand • AI-driven features that create measurable business value • Reliable deployment pipelines and streamlined development workflows • Technical solutions aligned with product and business objectives 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 & 𝐏𝐫𝐨𝐝𝐮𝐜𝐭𝐬 • AI & Automation Platforms • B2B and B2C SaaS Products • Marketplaces & Subscription-Based Applications • FinTech & Business Operations Tools • CRM, ERP & Internal Business Platforms • Analytics & Data-Driven Applications • Startup MVPs & Enterprise Software Solutions 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞 • 12+ years of professional software engineering experience • Strong full-stack expertise across frontend, backend, and cloud infrastructure • Proven ability to stabilize underperforming applications and scale growing products • Deep understanding of SaaS business models and product development lifecycles • Clear communication, ownership mindset, and results-driven execution Whether you need to launch a new SaaS product, modernize an existing platform, integrate AI capabilities, or resolve critical performance and scalability challenges, I bring the technical expertise and strategic thinking required to move your product forward with confidence. 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬: AI SaaS, SaaS Development, SaaS Engineer, Full Stack Developer, Full Stack Engineer, React.js, Next.js, Node.js, Ruby on Rails, Rails, TypeScript, JavaScript, MERN Stack, Web Development, Frontend Development, Backend Development, API Development, REST API, GraphQL, PostgreSQL, MySQL, MongoDB, Database Design, Database Optimization, Cloud Computing, AWS, Vercel, Docker, CI/CD, DevOps, Microservices, System Architecture, Software Architecture, Enterprise Applications, SaaS Architecture, Multi Tenant SaaS, AI Integration, OpenAI, Claude AI, Anthropic, LLM Integration, AI Automation, Generative AI, Chatbot Development, Workflow Automation, Performance Optimization, Application Scaling, Scalability, System Stabilization, Bug Fixing, Code Refactoring, Technical Leadership, Team Lead, Product Engineering, MVP Development, Startup Development, Agile Development, Software Engineering, Web Applications, Platform Engineering, Digital Transformation

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.

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!

I'm an experienced Ruby on Rails Developer with over 8 years of expertise in building scalable web applications. My background spans across back-end, front-end, DevOps, and blockchain projects. I have a strong passion for solving complex problems and delivering high-quality, maintainable code. Throughout my career, I've contributed to various industries including HRTech, FinTech, Blockchain, and SaaS. My expertise lies in optimizing application performance, upgrading legacy systems, and implementing best practices to improve security, scalability, and user experience. Core Skills & Tech Stack: ✅ Back-end: Ruby on Rails, Node.js, PHP ✅ Front-end: ReactJS, NextJS, AngularJS, TypeScript, JavaScript ✅ Database: PostgreSQL, MySQL, MongoDB ✅ Infrastructure & DevOps: AWS, Docker, Heroku, Sidekiq, Redis, CronJob ✅ Testing & Security: RSpec, Capybara, Cucumber, VCR, Devise, Pundit, JWT ✅ Other Tools & Technologies: Firebase, Grape API, Hotwire (Turbo + Stimulus), Web3, Twilio What I Can Do for You: 🚀 Develop and optimize full-stack web applications 🚀 Upgrade legacy systems and improve code quality 🚀 Implement best security practices for web applications 🚀 Develop and maintain blockchain-based applications 🚀 Optimize database queries and improve system performance 🚀 Provide technical consultation and team mentorship Work Experience Highlights: 🔹 Renec Foundation (2023 - 2025): Developed and maintained a decentralized exchange (NemoSwap) and built a centralized exchange (Wukong Exchange) with enhanced security features. 🔹 MotionsCloud (2021 - 2023): Participate the development of video call features, refactored legacy code, and improved system reliability. 🔹 JobReady (2018 - 2021): Upgraded Rails 3 to Rails 5, optimized database performance, and increased test coverage to 98%. 🔹 Steinsvik & BizzOn (2015 - 2018): Built internal tools, CMS platforms, and interactive web applications using multiple frameworks. Why Work with Me? ✅ I bring a problem-solving mindset to every project ✅ I ensure high code quality and best practices ✅ I communicate proactively and work well in teams ✅ I deliver projects on time and within budget Let's Build Something Great Together! Ready to discuss your project? Feel free to invite me for an interview! 🚀

I’ve been building Ruby on Rails websites and web apps for over 5 years, focusing on delivering high-quality results and finding the best solutions for each project. I love bringing ideas to life and have experience successfully launching products. 💡 I’m looking for exciting challenges and long-term collaborations where I can contribute and grow. ⤵️ Here are the skills I feel confident with: Backend: Ruby, Ruby on Rails Frontend: JavaScript, Vue.js, Vuetify, jQuery, HTML, CSS, SASS, Bootstrap Testing tools: RSpec Databases: MySQL, SQLite, PostgreSQL Cloud & DevOps: AWS APIs: REST API, Facebook API, Stripe, TurboSMS API, Fondi API Collaboration tools: Jira, Trello, Asana, Slack, MS Teams, Git (GitHub, GitLab, Bitbucket) I’m comfortable working with these gems: Devise, Active Admin, Kaminari, CarrierWave, Nokogiri, Redis, Resque, Whenever, MiniMagick, aws-sdk, Bugsnag, Skylight, dotenv-rails, etc. I always strive to meet my clients’ needs and deliver the best possible solutions. 💬 Tell me about your project – let’s build something great together! 🚀

Are you looking for a highly skilled Full Stack Engineer to build, scale, and optimize your web applications? You've come to the right place! 👨‍💻💡 With 6+ years of experience, I specialize in the MERN stack and Next.js, building high performance, scalable, and user friendly applications with React, Node.js, Express, and MongoDB. My focus is on writing clean, efficient code while actually understanding your needs, so you get a solution that fits the problem and not just the brief. 🌟 Throughout my career I've led and contributed to a wide range of projects, building scalable web apps from the ground up. I've designed and built complex system architectures with Node.js, Express, and Next.js, with React on the frontend and MongoDB or Postgres on the data layer. My experience includes integrating third party APIs like Stripe for payments, Twilio for messaging, and AWS services (EC2, S3, RDS) for cloud setups. 🌐 I've optimized database queries, improved app performance, and deployed efficiently with Docker and Nginx. 🚀 Working with both startups and established businesses, I've helped develop, maintain, and scale applications that meet real business needs, improve engagement, and drive revenue. Whether it's building MVPs, fixing up legacy systems, or scaling for high traffic, I deliver work that's solid, maintainable, and efficient. What I Can Do for You: MERN & Next.js Development ⚛️ Deep experience building full stack apps with React, Next.js, Node.js, and Express. From server side rendering and API routes to MongoDB and Postgres data layers, I handle the whole JavaScript stack end to end. Full Stack Development 🔄 End to end expertise building applications from scratch, frontend to backend to deployment. AI Integration 🤖 I build GPT-4o, vision, and LLM features into real products, not demos. I also use AI tooling like Claude Code and Cursor in my daily workflow, which means I ship faster without cutting corners on quality. Backend & API Development 🔌 Solid Node.js and Express APIs, clean architecture, and third party integrations that add real functionality and improve the user experience. Commitment to Code Excellence ✅ I care about quality, so I lean on thorough code reviews and solid automated testing. I also enjoy mentoring junior developers and helping their work strengthen the whole project. Optimizing Application Performance ⚡ I make apps faster by hunting down bottlenecks, adding caching where it counts, and tuning database queries for speed. Prioritizing Security 🔒 Security comes first. I follow best practices for data protection, authentication, and authorization, and I keep up with new threats so every app I build stays safe. Seamless CI/CD Implementation 🔄 Plenty of experience setting up and running CI/CD pipelines that streamline testing and deployment, so releases stay fast, reliable, and consistent. Why Partner With Me? Focused on Your Success 🎯 I take the time to understand your goals so what I deliver actually lines up with your vision. On time and on budget aren't negotiable for me. Passionate About Growth 📈 I keep learning and stay on top of new tools and trends so I can bring fresh, practical ideas to your projects. Collaborative Mindset 🤝 I work like an extension of your team and keep communication open the whole way through. Your feedback shapes the final result. Let's turn your next big idea into a successful web application. I'm ready to put my skills to work and help you get real results. 🚀

Hey, I’m Ali If I can’t deliver what we agreed, I’ll fix it or 𝘆𝗼𝘂 𝗱𝗼𝗻’𝘁 𝗽𝗮𝘆. I build and improve SaaS products, MVPs, and web applications that need to work reliably in production or help build them from the ground up. I work across the full stack from frontend UI to backend APIs, database design, SEO/content, and deployment. ▶ 𝐅𝐫𝐨𝐧𝐭-𝐞𝐧𝐝 𝐬𝐤𝐢𝐥𝐥𝐬: ➢ Next.js (App Router, SSR, SSG), React 18/19 ➢ TypeScript (strict mode), JavaScript ➢ Tailwind CSS, shadcn/ui ➢ React Hook Form, Single Page Applications ➢ Next.js Server Components ➢ SEO & Core Web Vitals optimization ▶ 𝐁𝐚𝐜𝐤-𝐞𝐧𝐝 𝐬𝐤𝐢𝐥𝐥𝐬: ➢ Node.js (NestJS, Express.js) ➢ PostgreSQL, Supabase (Auth, RLS, Edge Functions, Storage) ➢ Prisma ORM ➢ REST API & API development, third-party API integrations ➢ Authentication (NextAuth/Auth.js, Clerk, OAuth — Google, Microsoft, LinkedIn) ➢ Multi-tenant SaaS architecture ▶ 𝐃𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭 / 𝐈𝐧𝐟𝐫𝐚: ➢ Vercel, AWS (Lambda, Fargate) ➢ Docker (containerized environments) ➢ CI/CD (GitHub Actions, GitLab CI) ➢ Stripe (subscriptions, billing, webhooks) ▶ 𝐀𝐈 / 𝐋𝐋𝐌 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: ➢ OpenAI (GPT-4o), Anthropic Claude API ➢ AI agents & agentic workflows ➢ LLM integration into production apps (not just prototypes) ➢ MCP (Model Context Protocol) ➢ AI-augmented development (Cursor, Claude Code, Copilot, Windsurf) I use AI as a multiplier to ship faster, not to replace thinking or skip engineering decisions. Here’s how I usually help clients: ➢ Build SaaS platforms and MVPs from scratch ➢ Develop multi-tenant applications ➢ Take end-to-end ownership (API → database → UI → deployment) ➢ Integrate AI features into real products (not just prompt demos) ➢ Build secure authentication and user systems ➢ Design backend systems and APIs ➢ Optimize performance (Core Web Vitals, SSR/SSG, assets optimizations, database queries) ➢ Build full-stack apps and single-page applications ➢ Deploy, monitor, and maintain production systems I’m comfortable working in async, fast-paced environments and collaborating with teams where requirements evolve over time. If you need someone who can own features end-to-end and ship using an AI-augmented workflow? I’m happy to help. 𝘿𝙧𝙤𝙥 𝙢𝙚 𝙖 𝙢𝙚𝙨𝙨𝙖𝙜𝙚 — 𝙄 𝙧𝙚𝙥𝙡𝙮 𝙛𝙖𝙨𝙩. ~ 𝗔𝗹𝗶

As a Full-Stack Developer with 4+ years of experience, I build scalable web applications, internal platforms, and AI-powered solutions. I have led development teams and delivered business-critical systems across energy, logistics, and CRM domains. My expertise spans Ruby on Rails, Python, and modern web frameworks. Whether you need a full-stack platform, AI chatbot, or internal business system, I deliver production-ready solutions that scale with your business. Programming & AI: ✔ Ruby on Rails ✔ Python, Django, Flask, FastAPI ✔ RESTful API design ✔ AI Chatbots & AI Agents ✔ LLM Integration (OpenAI, Claude, Llama3) ✔ RAG Systems ✔ Background jobs, webhooks ✔ Authentication, authorization, multi-tenant systems Frontend Expertise: ✔ React.js, Next.js, Vue.js ✔ JavaScript, TypeScript ✔ HTML5, CSS3 ✔ Bootstrap, Tailwind CSS, Material-UI ✔ Dashboards, portals, modern UI development Backend Expertise: ✔ Ruby on Rails ✔ Python (Django, Flask, FastAPI) ✔ PHP, Laravel ✔ Node.js, Express.js Databases: ✔ PostgreSQL, MySQL ✔ MongoDB (NoSQL) ✔ Data modeling, optimization, reporting, analytics Mobile Apps: ✔ React Native Cloud & DevOps: ✔ AWS (EC2, S3, RDS, IAM, CloudWatch) ✔ Google Cloud Platform ✔ Ubuntu/Linux server deployment and management ✔ Docker ✔ CI/CD basics My Services: ✔ Custom AI Chatbot Development ✔ AI Agent Development ✔ Full-Stack Web Development (Ruby on Rails, Python, React) ✔ API Development & Integration ✔ CRM & Internal Platform Development ✔ Database Design & Optimization ✔ Team Leadership & System Architecture Industry Experience: ✔ Energy & Utilities ✔ Logistics & Transportation ✔ Healthcare ✔ Fintech ✔ E-commerce ✔ Enterprise Solutions ✔ Education Why Work With Me: • Clear communication with regular updates • On-time delivery with realistic timelines • Problem-solver focused on business outcomes • Clean, maintainable, scalable code • Experience leading teams and owning end-to-end projects Let's discuss your project. I'm available for a call to understand your requirements.

🏆 𝐓𝐨𝐩 𝟑% 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤 ⭐⭐⭐⭐⭐ I've been making custom software for more than ten years now. I'm really good at using Ruby on Rails, NodeJS, and ReactJS. On Upwork, I'm in the top 3% of developers! I love making software that's super good, works for a lot of people, and is easy to keep up-to-date. So, if you have an idea for a software, I'm your person! I've finished 42 projects so far and spent over 11,000 hours doing it. Every time, I make sure to solve tough problems in smart ways. Whether you want to make a new website, fix up an old one, or add cool new stuff, I can help. I believe in talking a lot with you to understand exactly what you need and helping you through the whole process. One of my recent wins was helping a client sell their business for $2.25 Million! Looking for someone with lots of experience, who you can trust, and who's really good at what they do? Let's make your ideas real!