Ruby on Rails Developers para contratar
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Freelancers patrocinados
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Contratar AdeelAslam4
✪ ✪ ✪ IN TOP 1% Freelancers of Freelancer.com ✪ ✪ ✪ We’re a Pakistan-based software development team helping startups, SMBs, and enterprises build high-quality digital products — fast and efficiently. From mobile apps and custom websites to eCommerce platforms and AI-powered solutions, we turn your ideas into real,...✪ ✪ ✪ IN TOP 1% Freelancers of Freelancer.com ✪ ✪ ✪ We’re a Pakistan-based software development team helping startups, SMBs, and enterprises build high-quality digital products — fast and efficiently. From mobile apps and custom websites to eCommerce platforms and AI-powered solutions, we turn your ideas into real, scalable software. Our expertise now includes AI/ML development and Generative AI integration, helping clients automate workflows, build smart features, and stay ahead with the latest in AI technology. We use proven tools, agile processes, and a partner-first mindset — offering clear communication, reliable delivery, and long-term support. Our core skills: ✅ UX/UI Design ✅ iOS & Android Apps ✅ Web Development (ReactJS, Laravel, Ruby on Rails, PHP/MySQL, Python) ✅ WordPress & Shopify ✅ Custom eCommerce Solutions ✅ API Integrations ✅ AI/ML & Generative AI Development Let’s build something great — together. menos -
Contratar atesicfl
As an experienced Back-end and Front-end developer, I'm passionate and seasoned full stack web developer specializing in MERN stack-based, Ruby On Rails and ASP.NET web applications. I have over 12 years of experience as full stack web developer. My goal as a professional developer is to satisfy my clients'...As an experienced Back-end and Front-end developer, I'm passionate and seasoned full stack web developer specializing in MERN stack-based, Ruby On Rails and ASP.NET web applications. I have over 12 years of experience as full stack web developer. My goal as a professional developer is to satisfy my clients' suggestions perfectly. I am confident well-versed in agile methodologies and possess excellent problem-solving skills, allowing me to deliver projects on deadline and within budget perfectly. Technologies: Back-End: Node, Nest, PHP, Smarty template, Laravel(Filament, Livewire), Symfony, Rub On Rails, ASP.NET|ASP.NET MVC | Entity framework|ASP.NET Core|ASP.NET Web API. Front-End: JavaScript, jQuery, Bootstrap, React, Redux, Next, Typescript, Angular, Tailwind CSS Database: MySQL, MongoDB, PostgreSQL, SQL Server, GraphQL Others: AWS Cloud, Scrum, Agile methodology, TDD, Azure DevOps, Git, SCORM 1.2/2004 standards. I look forward to the opportunity to contribute my experience and skills for you. Thank you for reading my profile. menos -
Contratar AwaisChaudhry
ZAWN Tech is a trusted software company founded in 2014, delivering complete digital solutions for startups and enterprises worldwide. Our certified developers combine deep technical knowledge with real-world project experience to build fast, secure, and scalable systems. Core Expertise Blockchain: Metaverse, Web3,...ZAWN Tech is a trusted software company founded in 2014, delivering complete digital solutions for startups and enterprises worldwide. Our certified developers combine deep technical knowledge with real-world project experience to build fast, secure, and scalable systems. Core Expertise Blockchain: Metaverse, Web3, NFTs, NFT Games, Smart Contracts, Arbitrage & Sniper Bots, DEX / DApp Development (Ethereum, BSC, Polygon, Solana, WAX). Web & SaaS Development: Full-stack using React, Node.js, Laravel, Django, and Next.js. Integration with Odoo, Bubble.io, Zoho, and Webflow. eCommerce: Shopify, WooCommerce, Magento, and custom marketplace platforms with payment, shipping, and ERP integrations. Mobile Apps: Native and cross-platform (Flutter, React Native, Android, iOS). AI & Computer Vision: Chatbots, GPT integrations, TensorFlow, OpenCV, and OCR systems. Game Development: Unity 3D, Unreal, and WebGL with multiplayer, blockchain, and AR/VR support. Trading & Financial Automation: MT4/5, TradingView, Binance, Interactive Brokers, and algorithmic trading bots. Hardware & IOT: Electronics, Microcontroller, PLC & SCADA, Electrical Engineering, Embedded Systems, Automation, Arduino, Raspberry Pi, ESP32, MATLAB, embedded control, and automation projects. With 200+ recommendations and over a decade of experience, we turn complex ideas into reliable, production-ready solutions — delivered with clear communication and long-term support. menos -
Contratar ptiweb
At PTI WebTech, we specialize in building full-stack digital solutions, including web development, ecommerce, mobile app development, digital marketing, and now AI-powered automation & integrations. Our goal is to help businesses scale faster, operate smarter, and deliver exceptional digital experiences. Our core...At PTI WebTech, we specialize in building full-stack digital solutions, including web development, ecommerce, mobile app development, digital marketing, and now AI-powered automation & integrations. Our goal is to help businesses scale faster, operate smarter, and deliver exceptional digital experiences. Our core mission is to automate business operations, workflows, and decision-making using cutting-edge technologies. We help you leverage AI to achieve real business impact — whether you’re a startup developing an MVP or an enterprise optimizing existing systems. With deep technical expertise and a product-first approach, we build solutions that drive growth and efficiency. Website: https://www.ptiwebtech.com/ What We Build: ✅Web & Ecommerce Solutions – Custom websites, CMS solutions (WordPress, Drupal), high-converting ecommerce stores (Shopify, Magento, OpenCart, Bigcommerce), APIs & integrations ✅ Mobile App Development – Cross-platform apps (React Native, Flutter) focused on performance, UX, and scalability ✅ Digital Marketing Services – Data-driven SEO, SMO, and Performance Marketing to boost traffic, engagement, and conversions ✅ AI Automation Systems – Workflow automation, CRM/ERP automation, predictive analytics dashboards, task automation, process optimization ✅AI Assistants & Integrations – Intelligent virtual assistants, chatbot automation, LLM-powered agents for support, scheduling, knowledge retrieval (OpenAI, LangChain, Whisper, Deepgram) ✅ Custom Software & MVPs – Full-stack development of SaaS platforms, web & mobile apps with AI-first capabilities Who We Work With: ✅ Startups building AI-driven or digital-first products ✅ Ecommerce businesses seeking automation, performance, and scalability ✅ Agencies looking to automate operations, lead generation, or client delivery ✅ SMBs & Enterprises integrating AI automation into core workflows ✅ Founders & Product Teams needing full-stack development with AI expertise Why Clients Trust Us: 👉 Full-stack expertise across Web, Mobile, Ecommerce, Digital Marketing & AI 👉 Proven delivery of tailored solutions aligned with business goals 👉 Transparent communication & collaborative process throughout 👉 Agile delivery – PMP & SCRUM certified teams 👉 99% Job Success rate on Upwork 👉 Strict NDA & IP compliance for complete data security Company Introduction Video https://www.youtube.com/watch?v=wLsfY492Y2E menos -
Contratar BradyKoehler
Primarily a web developer, most experienced with Ruby on Rails on the back-end, and HTML, CSS, and JavaScript (including various popular libraries) for front-end. Hobby developer in Rust. I enjoy problem solving and performance tuning Rails applications and database queries.Primarily a web developer, most experienced with Ruby on Rails on the back-end, and HTML, CSS, and JavaScript (including various popular libraries) for front-end. Hobby developer in Rust. I enjoy problem solving and performance tuning Rails applications and database queries. menos -
Contratar technosystem
Hello, I’m Sushil — a highly skilled expert in graphic design, blockchain development, web platforms, and mobile apps, proudly serving clients on Freelancer.com since 2005. With over 475 successful projects, a 9.9/10 client satisfaction rating, and a 98% job completion rate, I am committed to delivering top-notch...Hello, I’m Sushil — a highly skilled expert in graphic design, blockchain development, web platforms, and mobile apps, proudly serving clients on Freelancer.com since 2005. With over 475 successful projects, a 9.9/10 client satisfaction rating, and a 98% job completion rate, I am committed to delivering top-notch solutions that drive business growth and innovation. What I Bring to Your Project: - Blockchain Mastery: Specialized in creating custom crypto solutions (ERC-20, Bitcoin Core, Polygon, Solana), smart contracts, DEX platforms, NFT marketplaces, and secure wallets. - Full-Stack Development Expertise: From concept to deployment, I craft high-performance web and mobile apps using modern technologies like React, React Native, Node.js, and Flutter — optimized for speed and scalability. - Eye-Catching Designs: Whether it’s a stunning logo, a visually engaging website, or a 3D character for games, I create designs that not only look great but also establish trust and engagement. menos -
Contratar saweratauqeer
At WeblyStudio, we are a dynamic team of skilled professionals specializing in a wide range of creative and technical disciplines. With our diverse expertise, we provide innovative design and content solutions tailored to our clients' specific needs. Our skill set includes: • React, Vue.js, Next.js, Nuxt.js for...At WeblyStudio, we are a dynamic team of skilled professionals specializing in a wide range of creative and technical disciplines. With our diverse expertise, we provide innovative design and content solutions tailored to our clients' specific needs. Our skill set includes: • React, Vue.js, Next.js, Nuxt.js for cutting-edge web development • Redux for state management • Firebase for seamless integration and real-time updates • Laravel and PHP for robust backend development • CSS3, HTML5, and JavaScript for captivating and interactive user experiences • Branding & Identity Design to create a compelling visual presence • Graphic Design for eye-catching marketing materials • Video Production & Animation to tell engaging stories • Content Creation & Copywriting for persuasive messaging • Marketing & Advertising Strategy for effective campaigns • User Experience (UX) & User Interface (UI) Design for intuitive and engaging interfaces Our unwavering commitment to excellence ensures that we deliver exceptional results. We prioritize close collaboration with our clients, listening attentively and adapting our approach to exceed expectations. As your reliable partner, we are invested in your success and dedicated to creating work that both you and we can take pride in. Choose WeblyStudio for your next project and unlock the potential of a committed and versatile creative powerhouse. Together, let's bring your brand's vision to life. menos -
Contratar ammonite
Modelado 3D, Desarrollo de Chatbots con IA, Desarrollo de IA, Desarrollo de Modelos de IA, Desarrollo de Aplicaciones para AndroidI have 2️⃣0️⃣🆙 years of development experiences including 5️⃣years for ✨Fujitsu✨ and 5️⃣years for ✨Prime Strategy Inc✨. I built GIS, Fintech, Sass, Data Analytics platforms, AI powered applications and Mobile 3D games etc. I focus on clean architecture, performance, and maintainable code. I can develop full-stack...I have 2️⃣0️⃣🆙 years of development experiences including 5️⃣years for ✨Fujitsu✨ and 5️⃣years for ✨Prime Strategy Inc✨. I built GIS, Fintech, Sass, Data Analytics platforms, AI powered applications and Mobile 3D games etc. I focus on clean architecture, performance, and maintainable code. I can develop full-stack systems, improve existing platforms, and deliver production-ready solutions. Here are my core skills : ✅React, Next.js, Vue.js, Angular.js, TypeScript, JavaScript (ES6+), HTML5, CSS3, TailwindCSS, Bootstrap, WebSockets, responsive UI, modern component architecture ✅Node.js, Python, Go, Java, C#, NET Core / ASP.NET, Express.js, FastAPI, Django, Spring Boot ✅Flutter, Dart, .NET MAUI, Xamarin, React Native, Android SDK, iOS ✅OpenAI API, LangChain, Hugging Face, PyTorch, TensorFlow, prompt engineering, AI automation tools, NLP systems ✅PostgreSQL, MySQL, SQL Server, MongoDB, Redis, Elasticsearch, BigQuery, data modeling, query optimization ✅AWS, Google Cloud Platform, Microsoft Azure, Docker, Kubernetes, Terraform, serverless architecture, cloud networking, CDN systems ✅Zoho Creator, Zoho CRM integrations, Zoho Deluge scripting, business workflow automation, enterprise API integrations, CRM automation, ERP integrations, low-code platforms, internal business tools Please feel free to reach out if you are looking for a reliable engineer to build scalable software, improve your existing system, or turn your idea into a production-ready product. Thank you. menos -
Contratar Lazarone1
I’m an AI Agent Engineer, Automation Specialist, and Full-Stack Developer with a deep passion for embedding intelligence into real-world web and mobile products and eliminating manual business workflows through automation. My core focus is designing, building, and deploying AI-driven systems—from LLM-powered agents...I’m an AI Agent Engineer, Automation Specialist, and Full-Stack Developer with a deep passion for embedding intelligence into real-world web and mobile products and eliminating manual business workflows through automation. My core focus is designing, building, and deploying AI-driven systems—from LLM-powered agents and voice assistants to data-aware automation pipelines that integrate seamlessly with production applications. I work extensively with large language models (LLMs), retrieval-augmented generation (RAG), vector databases, embeddings, tool-calling frameworks, and agent orchestration patterns to create systems that reason, act, and scale reliably. On the backend, I build high-performance APIs and services using FastAPI, Flask, Node.js, and Django, with strong experience in async architectures, background workers, and event-driven systems. I regularly work with PostgreSQL, MySQL, Redis, MongoDB, and Neo4j, and design robust data layers using SQLAlchemy, Prisma, and ORM/DAO patterns. For AI workloads, I integrate OpenAI, Anthropic, Ollama, ElevenLabs, and custom inference pipelines, alongside Qdrant, Pinecone, FAISS, and hybrid search setups. On the frontend, I build modern, scalable interfaces using React, Next.js, Vite, Tailwind CSS, and TypeScript, with a strong emphasis on UX for AI-powered tools (real-time streaming, agent state visualization, conversation flows, and admin dashboards). For mobile, I work with React Native and cross-platform architectures to bring AI features directly into user-facing apps. Automation is a major part of my work. I design end-to-end business automation systems using Make.com, n8n, webhooks, cron jobs, message queues, and direct API integrations. This includes automating CRM workflows, email systems, call routing, lead qualification, reporting, and data synchronization across platforms like Twilio, Slack, Google Sheets, Stripe, Shopify, and internal tools. I’m highly experienced in AI voice agents and real-time systems, integrating Twilio, speech-to-text (STT), text-to-speech (TTS), streaming APIs, and conversational state management to build production-ready voice and chat agents. I also work on computer-vision and multimodal pipelines, combining vision models, tracking, and sensor data for advanced use cases. From an infrastructure and MLOps perspective, I deploy and scale systems using Docker, Linux servers, cloud VPS, CI/CD pipelines, and GPU-accelerated environments. I care deeply about observability, logging, error handling, security, and cost optimization in AI systems. Above all, I love turning business problems into automated, intelligent systems—reducing operational friction, increasing efficiency, and building products where AI is not a feature, but a core capability. If you need AI agents, automation pipelines, or full-stack systems that actually work in production, that’s exactly what I build. menos -
Contratar matheussilva114
matheussilva114 matheussilva114
$30 USD / hora
FULL-STACK ENGINEER| DATA SCIENTIST| AI SPECIALISTBrazilAutomatización, Soluciones en la nube, Gestión de páginas web, Amazon Web Services, Integración de APIAs a Senior Full-stack developer, Data Scientist and AI/ML Engineer with over 6 years of experience, I specialize in designing, developing, and deploying Software Products with good machine learning solutions. My expertise spans across Machine Learning, Deep Learning, NLP, Computer Vision, and Generative AI,...As a Senior Full-stack developer, Data Scientist and AI/ML Engineer with over 6 years of experience, I specialize in designing, developing, and deploying Software Products with good machine learning solutions. My expertise spans across Machine Learning, Deep Learning, NLP, Computer Vision, and Generative AI, enabling businesses to harness the full potential of AI for automation, insights, and innovation. menos
