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I’m a Senior Software Engineer with 10+ years of experience building scalable full-stack, SaaS, and AI-powered applications. My core stack includes JavaScript/TypeScript, React, Node.js, Python, PostgreSQL, and AWS, with strong experience designing cloud-native and microservices-based systems. In recent years, I’ve focused heavily on AI-driven platforms and intelligent automation. I recently architected an enterprise AI copilot platform using Python (FastAPI), Node.js, LangChain, Weaviate, and multiple LLM providers. The platform supports conversational AI, RAG-based document retrieval, realtime streaming responses, and voice interaction using speech-to-text and text-to-speech services. I’ve also worked on AI-driven multimedia systems involving voice-enabled AI avatars, realtime conversational interfaces, media upload pipelines, and AI-assisted content workflows. My experience includes practical use of FFmpeg for media compression, streaming optimization, format conversion, and multimedia processing workflows, alongside integrations with OpenAI and ElevenLabs APIs for voice and conversational AI experiences. Previously, I developed AI assistants and automation tools including a LangChain-powered ecommerce support chatbot and a voice-enabled AI assistant using Flask, ChromaDB, and OpenAI. These systems combined LLM reasoning with contextual retrieval pipelines to deliver accurate, production-ready AI interactions. Beyond AI systems, I’ve built and scaled multiple production SaaS platforms across fintech, ecommerce, HR, e-voting, and enterprise operations. Notable projects include FlexiCoop (multi-tenant fintech SaaS), Fivage cloud storage platform, Scavenge ecommerce systems, and cross-platform offline-first POS applications built with Electron. On the infrastructure side, I regularly deploy and scale applications using AWS services including EC2, RDS, S3, CloudFront, Route53, IAM, and CI/CD pipelines through GitHub Actions and AWS Amplify. I also actively leverage AI-assisted development tools such as Cursor, GitHub Copilot, and ChatGPT to accelerate engineering workflows, refactor legacy systems, and rapidly prototype scalable features. Overall, I enjoy building AI-enabled products and scalable systems that bridge intelligent automation with real business workflows while delivering reliable, high-performance user experiences. Currently, I am actively building and scaling AI-powered SaaS systems, enterprise copilots, fintech platforms, and conversational AI workflows involving RAG pipelines, vector databases, voice interaction systems, and cloud-native infrastructure.
Hard-working, focused, fast learning graduated in Computer Science. Worked on the development of an Operational System and Linux kernel to be used on Vehicular Ad hoc Networks. Currently working with software development, with experience in web development. Good interpersonal skills, team worker, willing to help and listen. Fluent in English and Portuguese.
I am a **Senior** **Product Architect & Engineer** with 10+ years of experience bridging product strategy, system architecture, and full-stack execution. I specialize in taking products from zero to one and architecting scalable, cross-platform applications across Web, Mobile (Capacitor/Ionic), and Desktop (Tauri/Electron). I operate at the intersection of UX fidelity, clean system design, and business constraints—ensuring applications are fast, maintainable, and aligned with user needs. ### Core Offerings & Focus Areas: * **0-to-1 Product Architecture & Multi-Tenant Platforms:** Designing modular, cloud-native frontend and backend systems (Next.js, Node.js, Python, PostgreSQL/Supabase, AWS) with strict isolation, high performance, and rapid deployment cycles. * **AI-Native Applications & Interfaces:** Architecting user-facing AI workflows with OpenAI and Google Gemini APIs. Specialization in building transparent interfaces requiring source attribution, confidence metrics, and audit trails. * **Cross-Platform Product Strategy:** Unified codebases powering Web, Hybrid Mobile (Ionic/Capacitor), and native-feel Desktop apps (Tauri/Electron) to maximize feature velocity and reduce maintenance overhead. * **Design Systems & Frontend Infrastructure:** Establishing robust component libraries (Tailwind, Radix/Shadcn) and end-to-end testing pipelines (Playwright) to accelerate teams without sacrificing UI polish. **Core Stack:** TypeScript, React, Next.js, Node.js, Python, PostgreSQL, Supabase, Tauri, Ionic/Capacitor, React Native, AWS, Playwright.
Experienced (18+ years) developer and friendly Ruby on Rails and React/Next.js/Redux Developer/Mentor (with passion for helping others learn) | ★ 3,655+ 5 ★ sessions/jobs. 10+ years on top of the Codementor Ranking ★ https://www.codementor.io/ruby-on-rails-experts I am a Senior Software Engineer from Toronto, currently working as a Ruby on Rails and React/Redux Developer at theScore Inc. I am passionate about helping and mentoring people, especially those who are new to web development and the programming world. I am specialized in explaining the core concepts of Ruby and Rails, Javascript, React, APIs and everything else along with the best practices. I focus on the learning experience of my students and make sure they get exactly what they want. I have excellent academic track records (Bachelor of Science in Computer Science and Masters in Computer Engineering from the University of Toronto) along with strong development and industry experience in Software Development and Web Development (18+ years coding experience in total). I have helped more than 800 individuals here at CodeMentor (with 3,655+ 5 ★ sessions) with their projects implementation, bug fixes, architecture advices, performance improvements etc. I have worked with a bunch of CEOs and CTOs of YC start-ups and helped them with their projects. Made long term relationships with many of them which I help in a regular basis today. I have helped a LOT of bootcamp students here at CodeMentor and helped them build their web development career path and getting jobs after the completion of their bootcamp cohorts. Here at CodeMentor, I have helped people from all levels: From someone who is brand new to programming to 30+ years of experienced Senior Software Engineers, Product Managers and everyone in between. It's been an amazing journey here at CodeMentor for the last 8+ years! :-) I started programming and solving problems in 2006, at the age of 18. Since then, I wrote programs in a variety of programming languages such as C, C++, Java, PHP, Ruby, Python, Javascript, etc. These days, I use Ruby and Rails and React JS as my primary programming languages and frameworks. I can help with debugging your issues as well as refactoring your code according to the best practices and conventions out there. Helping people is my passion and motto in life. If you think I can help you in any way, please get in touch! Specialties: * Building scalable and performant backend APIs in Ruby on Rails (Active Model Serializer, GraphQL, Grape, Jbuilder, RABL, etc.) for android, iPhone or web applications. (For more than 12 million users). * Integration of backend APIs with Javascript frontend framework (ReactJS) using JSON Web Token (JWT). * Built highly scalable Push Notification System for theScore sports application (For ~10 million users). * Implemented instant player, team and news article search for the theScore and theScore eSports apps which have more than 6 million monthly active users using ElasticSearch and Rails. * Backend Ruby on Rails Development (With scaling, performance optimizations, database query optimizations, caching best practices, etc.). * Test Driven Development with clean code and best practices. * Web Scraping (Nokogiri, Mechanize) (Scrape data from anywhere on the internet!). * Reverse engineering complex APIs and web applications to write automated scripts to mimic and automate user behaviour and extract required data. * Explain concepts/solutions clearly and concisely according to the level of the client/student. (Helped over 800 people on CodeMentor with 3,655+ 5 ★ sessions) * Giving architecture advice for your application. Explain which tools/gems to use and why. * Setting up SSL certificates for Rails application (Nginx server) on AWS EC2 instance and securing your application. * Suggesting best practices and focusing on the best learning experience and long-term achievements. * Showing cool tips and tricks that I have learned over the past 18+ years (and still learning!) as a professional Ruby on Rails developer to be more productive and efficient at work. * Upgrading Ruby/Rails versions for your existing application. * Finding bottlenecks and Optimizing performance for your slow Rails applications. * I can help you to prepare for interviews for Ruby on Rails developer position, or any other Software Development position. I have successfully guided many developers who got their dream jobs after practicing coding interviews with me!
Self-taught full stack developer. Helped over thousands of clients to build their small to large scale websites. I love building high performance and scalable websites. Over the past few years, I have been heavily working on WordPress and Laravel. My top skills are: WordPress (oh, not to mention I used many popular plugins like: ACF, Gravity Forms, etc.), Laravel, MongoDB, MySQL, ElasticSearch, jQuery, Bootstrap, Redis, RETS integration, Plesk, WHM and many more! I occasionally do system admin tasks as I am managing plenty of servers running on CentOS. If you are lost in coding, need a hand or running out of ideas, feel free to reach out to me. I am not available for a full time hire but happy to help you with any kind of help you need with your projects.
AI Systems Architect, GTME, CSA, SRE, and Fractional CTO helping organizations leverage custom AI, autonomous agents, and cloud infrastructure to build products faster, automate operations, and scale efficiently. Expert in custom AI model development, fine-tuning, RAG implementations, multi-agent systems, AI-powered workflow automation, LLM integration, cloud architecture, cybersecurity, and high-availability SaaS operations. With decades of hands-on engineering experience and deep expertise in modern AI tooling, I bridge the gap between traditional software engineering and next-generation AI systems. I build production-ready AI solutions that deliver measurable business outcomes—not demos, prototypes, or hype. From custom AI platforms and autonomous agent ecosystems to cloud-native SaaS infrastructure and mission-critical production environments, I help organizations deploy secure, scalable systems that create immediate operational leverage. Extensive NDA obligations limit what I can publicly share, but my experience spans startups, growth-stage companies, enterprise organizations, and large-scale SaaS platforms operating under demanding uptime, privacy, and security requirements.
Berlin based senior developer. Developed iOS for 10 years, developed Swift since the inception. Has 3 of the top 10 free news apps in Turkey on App Store and Google Play Store.
Sean X. Luo is a highly proficient web developer with over 12 years in the field. He has experience developing from micro-sites and landing pages all the way to high volume web applications. He graduated from Sarah Lawrence College with a Bachelor of Liberal Arts in 2006 with a concentration in music and writing. Some of the companies he's worked for include Oscar winning VFX studio Rhythm & Hues, high-end retail tech startup AHALife, international tech consulting firm FTC in Beijing, digital ad agency Something Massive, and most recently Weber Shandwick in Los Angeles. Clients he's worked with include AAPD, Celgene, Choose Cherries, College Possible, Covered California, Electrolux, Excedrin, Genentech, GM, GoGo, Home Depot, Mattel, ResMed, Tracfone, Unilever, the United States Army, and VMWare, Regal Cinemas, Plum Organics, and film studios Sony, Paramount, and Fox. He specializes in PHP, MySQL, Wordpress, HTML, CSS, Javascript/jQuery/AJAX, 3rd Party API Integration, and Python/Django, among others.
I'm a Mobile Dev who writes apps for my indie startup and have published 9 apps to the App store to date with over 100K in downloads. I'm Passionate about code and understanding concepts - the why behind the what! Love helping new Developers learn the ropes - no question too small. Check out one of my apps here: https://apps.apple.com/ca/app/starcaster-night-sky-astronomy/id1121446331
A problem solver thru analytical observation and a creator. Frontend and Backend software architect for a ride sharing app, which scaled bandwidth towards 40,000 users. Knowledgable from basics of implementing and configuring APIs and SDKs, Frontend development plan on web,mobile and backend from basic functions to machine learning and algorithm implementation. An individual who is driven by innovation leveraging on technology and design . Hyu believes in executing projects beyond conservative means and devoted to problem solving with a different perspective.
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