RxJS Specialists For Hire
Showing 11 results
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Hire David198493
Senior Full-Stack Engineer with 13+ years of experience designing and scaling high-performance financial and data-driven platforms. Specialized in building secure, distributed backend systems using C#, .NET Core, and Node.js, with modern frontend development in Angular, React, and TypeScript. Proven expertise in...Senior Full-Stack Engineer with 13+ years of experience designing and scaling high-performance financial and data-driven platforms. Specialized in building secure, distributed backend systems using C#, .NET Core, and Node.js, with modern frontend development in Angular, React, and TypeScript. Proven expertise in microservices architecture, high-volume transaction processing, cloud-native infrastructure (AWS), and automated CI/CD pipelines. Strong focus on clean architecture, performance optimization, system reliability, and technical leadership within remote and cross-functional teams. less -
Hire senbhavin
Founders come to me when they need one engineer who owns the entire product: React, Next.js, Node.js, Python, AI integration, mobile app, and deployment. I build AI-powered SaaS products, MVPs, and full-stack web and mobile applications from architecture to production deployment. In 10+ years, I have shipped...Founders come to me when they need one engineer who owns the entire product: React, Next.js, Node.js, Python, AI integration, mobile app, and deployment. I build AI-powered SaaS products, MVPs, and full-stack web and mobile applications from architecture to production deployment. In 10+ years, I have shipped products used by real businesses: → Built multi-tenant SaaS platforms with schema-based data isolation, role-based access control, Stripe subscription billing, and full admin dashboards deployed and running in production. → Integrated OpenAI, Claude, Azure OpenAI, and LangChain into real products, building AI agents, RAG pipelines, and speech-to-text workflows. → Engineered custom NLP engines with 93.3% entity accuracy, sub‑20ms responses, and scalable processing across 500+ products in a 5‑step state machine. → Developed React Native and Flutter apps with real-time features, third-party payment, and map integrations, delivered simultaneously on iOS and Android. → Engineered real-time architectures using WebSockets, SignalR, and Socket IO for platforms handling 10,000+ concurrent users without performance degradation. → Built and integrated complex third-party systems, DocuSign contract workflows, IMAP email ingestion, government compliance APIs, G2A catalog sync, and multi-system automation pipelines. → Worked across SaaS, healthtech, logistics, e-commerce, sports, fintech, and real estate, adapting quickly to domain requirements without hand-holding. → Maintained Preferred Freelancer badge with Top Rated Freelancer, across 150+ completed projects with long-term client relationships and on-time delivery. My stack covers the full product: → AI & LLM Integrations • OpenAI, Claude, Gemini API Integration • LangChain, Pinecone, Weaviate, FAISS • Custom AI Agents, Intelligent Workflows, RAG Architecture → Frontend Development • React, Next.js (App & Pages Router), Vue.js, Angular • Tailwind CSS, Material UI, Chakra UI, Framer Motion • Redux, Context API, React Query → Backend Development • Node.js, Express.js, Nest.js • Python, Django, FastAPI, Flask • Supabase, Firebase, REST APIs, GraphQL • WebSockets, Socket IO, JWT/OAuth Authentication → Mobile Development • React Native (Expo & CLI), Flutter • Real-time chat & video (Twilio, Agora, WebRTC) • Third-party integrations (Stripe, Maps, Push Notifications) → Database & Cloud • PostgreSQL, MySQL, MongoDB, Redis • AWS (S3, EC2, Amplify), Google Cloud I work best with founders and technical leads who need one reliable engineer to own the build end-to-end. I communicate clearly, flag blockers early, and treat your deadline as mine. Send me a message with your requirements, and we can outline your technical roadmap on a quick call. Bhavin Sen less -
Hire mhhasibuzzaman
mhhasibuzzaman mhhasibuzzaman
$40 USD / hour
Full Stack Engineer Specializing in AI-Powered WebCanadaOver the years, I’ve worked across a range of stacks—React, Next.js, Angular, Python (Flask, Django), ASP.NET, Node.js, and Vue—often blending them with cloud platforms like AWS, Azure, and Firebase to deploy robust solutions. Whether it’s building sleek front-end interfaces or architecting back-end systems that...Over the years, I’ve worked across a range of stacks—React, Next.js, Angular, Python (Flask, Django), ASP.NET, Node.js, and Vue—often blending them with cloud platforms like AWS, Azure, and Firebase to deploy robust solutions. Whether it’s building sleek front-end interfaces or architecting back-end systems that handle thousands of requests per second, I take pride in making products that don’t just function—they perform. By 2022, I was leading full-stack projects using the MERN and MEAN stacks, helping startups launch MVPs in as little as 6 weeks. But I didn’t stop there. As demand grew for smarter, more adaptive systems, I began integrating AI into the products I built. I started with OpenAI’s GPT API, using it to power dynamic customer service bots. Then came automations: workflow engines built using tools like n8n, Make.com, and Zapier that helped businesses cut hours of manual work each week. One project I’m particularly proud of involved building an AI-powered concierge for a travel platform. The bot not only understood user intent from messy input but also remembered returning users, supported multilingual interactions (English + Mandarin), and triggered real-time booking workflows via a custom Node.js backend. What once required human agents was now fully automated—saving the client over 40 hours of support time each week. I’ve also containerized complex systems using Docker and orchestrated multi-service deployments, ensuring they remain stable under load. From crafting admin dashboards with React + Tailwind to deploying .NET APIs on Azure for enterprise clients, I’ve worn many hats—and enjoyed the variety. But beyond the tech, what drives me is problem-solving. Whether it's debugging an edge case at 2 a.m. or streamlining an onboarding flow to reduce churn, I thrive at the intersection of logic and creativity. I don’t just build for today—I build with an eye on what’s next. If you're looking for a developer who can combine engineering precision with creative insight to deliver solutions that are both smart and scalable, I’d love to connect Let’s build what’s next—together My Skills Frontend Development: React, Next.js, Angular, Vue.js, Tailwind CSS, HTML5, CSS3, JavaScript (ES6+), TypeScript Backend Development: Node.js, Express.js, Python (Flask, Django), ASP.NET Core, PHP Full-Stack Frameworks: MERN Stack, MEAN Stack Cloud Platforms & Deployment: AWS (EC2, S3, Lambda), Microsoft Azure, Firebase API Development & Integration: REST, GraphQL, third-party API integrations AI & Automation: OpenAI GPT API, n8n, Make.com, Zapier, custom workflow automation Databases: MySQL, PostgreSQL, MongoDB, Firebase Firestore DevOps & CI/CD: Docker, Docker Compose, container orchestration, GitHub Actions, Azure DevOps less -
Hire sai0671
I'm a Senior Full-Stack & AI Automation Engineer with 6+ years of experience helping startups, agencies, and businesses turn ideas into reliable, scalable digital products. Throughout my career, I've worked on projects ranging from SaaS platforms and e-commerce systems to AI-powered applications and complex business...I'm a Senior Full-Stack & AI Automation Engineer with 6+ years of experience helping startups, agencies, and businesses turn ideas into reliable, scalable digital products. Throughout my career, I've worked on projects ranging from SaaS platforms and e-commerce systems to AI-powered applications and complex business automation workflows. One thing I've consistently found is that successful software isn't just about writing code—it's about understanding the problem behind the project and building solutions that make a real impact. I've helped founders launch products from scratch, modernized legacy systems that were slowing down business growth, and developed automation solutions that saved teams countless hours of repetitive work every week. Whether it's streamlining operations, improving customer experiences, or integrating AI into existing workflows, I enjoy finding practical ways to use technology to solve real business challenges. My approach is simple: understand the business goals first, then build solutions that are scalable, maintainable, and designed for long-term success. Clients often appreciate that I communicate clearly, take ownership of my work, and remain focused on delivering results rather than just completing tasks. On the technical side, I specialize in modern full-stack development using React, Next.js, Node.js, TypeScript, and Python. I also work extensively with AI technologies, including LLM integrations, AI agents, workflow automation, chatbots, and API-driven solutions that help businesses operate more efficiently. Core Expertise • Full-Stack Web Development • React, Next.js, Node.js & TypeScript • Python Development & Automation • AI Agents & AI-Powered Applications • OpenAI, Claude & LLM Integrations • Workflow Automation & Process Optimization • REST & GraphQL APIs • SaaS Platform Development • Shopify & E-commerce Solutions • Stripe & Payment Gateway Integration • PostgreSQL, MySQL & MongoDB • AWS, Docker & Cloud Deployment I take pride in building software that not only works well today but continues to support business growth for years to come. Whether you need a new product built from the ground up, an AI automation solution, or an experienced engineer to strengthen your development team, I'm ready to help. Let's build something that delivers real value to your business. 🚀 less -
Hire dreamerherry
✨ Welcome to Empiric Infotech: AI-Powered Mobile, Web & Full-Stack Development ✨ Most AI and software projects don’t fail because of ideas, they fail because of slow execution, weak architecture, and systems that don’t scale. With 12+ years of experience, a 5.0 rating across 67 client reviews, and a consistent...✨ Welcome to Empiric Infotech: AI-Powered Mobile, Web & Full-Stack Development ✨ Most AI and software projects don’t fail because of ideas, they fail because of slow execution, weak architecture, and systems that don’t scale. With 12+ years of experience, a 5.0 rating across 67 client reviews, and a consistent record of 100% on-time and 100% on-budget delivery, Empiric Infotech helps startups and enterprises turn ideas into reliable, scalable, production-grade AI and software products. We are a full-service AI, SaaS, and product engineering agency trusted across the US, UK, and Europe. As an Official FlutterFlow Expert Agency Partner, we also accelerate MVP and mobile product delivery, helping founders launch faster, validate sooner, and scale confidently. Our core competencies include: ✅ AI Development & Machine Learning: LLM-powered applications, AI agents, RAG pipelines, AI chatbots, and intelligent systems using OpenAI, Claude, Gemini, GPT-4, LangChain & LangGraph, enabling automation, decision intelligence, and conversational AI solutions. ✅ MVP & SaaS Development: Rapid MVP development and scalable SaaS platforms with multi-tenant architecture, subscription systems, and production-ready deployment using modern engineering practices. ✅ Full-Stack Web Development: High-performance web applications built with React, Next.js, Node.js, FastAPI, and scalable backend architectures integrated with PostgreSQL, Firebase, and AWS. ✅ Mobile App Development: Native-quality iOS and Android applications using Flutter & FlutterFlow, optimized for performance, UX, and rapid go-to-market product launches. ✅ API Integration & System Engineering: Seamless third-party and custom API integrations including Stripe payments, CRM systems, ERP platforms, WebRTC, and enterprise-grade services, ensuring smooth system interoperability. ✅ AI Workflow Automation: Intelligent business automation pipelines using n8n, Make, and Python, streamlining operations across marketing, sales, support, and internal workflows. ✅ Cloud & DevOps Infrastructure: Scalable deployments and cloud-native systems using AWS, Firebase, Docker, and CI/CD pipelines, ensuring reliability, security, and performance at scale. ✨Specialties: From a simple landing page to a complex AI-powered enterprise SaaS, we deliver scalable, production-grade systems with clean code and seamless handoff. 🏆Recent Work: • AI health diagnostics platform (HIPAA-compliant, multi-tenant) • Multi-channel AI conversation web app • PDF automation saving legal teams 20+ hrs/week • B2B e-commerce platform with AI-assisted procurement 📩 Have an AI, SaaS, or app idea? Share it with us and we’ll respond with a clear technical plan, realistic scope, and transparent pricing. less -
Hire smitk9999
With 7+ years of experience as a Senior Software Engineer, I help businesses build scalable, reliable, and modern digital products across web, mobile, desktop, cloud, and AI-driven platforms. My background covers full-stack development, backend architecture, cloud infrastructure, API integrations, automation, and...With 7+ years of experience as a Senior Software Engineer, I help businesses build scalable, reliable, and modern digital products across web, mobile, desktop, cloud, and AI-driven platforms. My background covers full-stack development, backend architecture, cloud infrastructure, API integrations, automation, and AI-powered solutions. I’ve worked with startups, agencies, and growing companies to develop production-ready systems that are fast, maintainable, and built for long-term growth. My core expertise includes: • C#, .NET / .NET Core, ASP.NET MVC, Web API • Angular, React.js, Next.js, Vue.js, TypeScript, JavaScript • SQL Server, PostgreSQL, MySQL, MongoDB, SQLite • AWS, Azure, Docker, CI/CD, Linux, Nginx, IIS • REST APIs, GraphQL, Microservices, Payment Integrations • WordPress, Magento, CMS Development • Mobile Development with React Native and Flutter • AI & Automation using OpenAI, ChatGPT, Gemini, MCP, n8n, Make.com • Blockchain & Web3 technologies including Solidity, Ethereum, Solana, Smart Contracts, DApps • Data Scraping, Automation, Dashboards, Power BI, Airtable, Google APIs I also have strong experience leading projects and collaborating with teams — from planning architecture and reviewing code to mentoring developers and delivering high-quality software on time. Recently, I’ve been working with AI agents, LLM integrations, and MCP-based workflows, helping businesses connect AI systems with real-world tools, APIs, databases, and business logic in practical and scalable ways. I focus on writing clean, maintainable code and building solutions that solve real business problems — whether it’s a SaaS platform, automation system, AI application, eCommerce platform, internal dashboard, or enterprise backend. I value clear communication, dependable delivery, and long-term professional relationships. Let’s build something great together. less -
Hire juanjosec63
Hello! I'm Juan Jose C, a full-stack developer experience in building modern web app, game and integrating AI features. I specialize in creating dynamic, scalable solutions with a focus on AI-driven functionality, using technologies like C#, .Net, Core, WebGL, Three.js, Angular, React, Next.js, Node.js, Vue.js and...Hello! I'm Juan Jose C, a full-stack developer experience in building modern web app, game and integrating AI features. I specialize in creating dynamic, scalable solutions with a focus on AI-driven functionality, using technologies like C#, .Net, Core, WebGL, Three.js, Angular, React, Next.js, Node.js, Vue.js and Tailwind CSS. I also leverage the latest and most popular AI code tools to write fast, efficient, and scalable code, ensuring top-tier performance and innovation in every project. My Main Skills: Frontend: React, Next.js, Vue.js, TailwindCSS, Shadcn Backend: Node.js, Express, Laravel, Python, Django, REST APIs, FastAPI, GraphQL, WebSocket, Socket.io AI & LLMs: OpenAI (GPT-4, ChatGPT), Chatbot, LangChain, Cohere, Pinecone Cloud & Deployment: Vercel, AWS, Firebase Database: MySQL, MongoDB, PostgreSQL, Supabase, Adrant, ChromeDB Tools: Cursor, Lovable, Bolt.new, V0.dev, Zed, Warp, Figma less -
Hire deepaksonidz
Having more than 8 years plus experience in IT/Software Development & SEO/SMO. I am individual with a team of designers and developers who are Expert in Web Designing & Development, Graphics Design, Animation & Multimedia, Android App, & SEO/SMO to meet your every requirement. We are experts working from past 7 years...Having more than 8 years plus experience in IT/Software Development & SEO/SMO. I am individual with a team of designers and developers who are Expert in Web Designing & Development, Graphics Design, Animation & Multimedia, Android App, & SEO/SMO to meet your every requirement. We are experts working from past 7 years and now willing to grow in freelancer industry. We are willing to work with you please consider us and give revert on our bid. Feel free to get in touch with me if you need: Graphics Design (Flyer, Banner, Web Layout, Logo, ID Card, Visiting Card) Animation Design Approval Website Design Website Development Mobile Apps Development E-Commerce Website Software Solution Full SEO package SMO (Social Media Marketing) less -
Hire shrec
Hi, I want to start by saying thank you for taking the time to read through my profile. I am an IT and Computer Science Specialist with over 15 years of experience in the industry. I have a genuine passion for my work, and love being able to use that passion to create original, creative projects for my clients. I...Hi, I want to start by saying thank you for taking the time to read through my profile. I am an IT and Computer Science Specialist with over 15 years of experience in the industry. I have a genuine passion for my work, and love being able to use that passion to create original, creative projects for my clients. I can work with a large list of different software and coding languages, including: • HTML • CSS • Javascript • Jquery • Front-End Frameworks (Bootstrap, Google's Material Design) • Javascript Frameworks (Angular, React, Vue) • Preprocessors (Less, Sass) • Building Tools (Gulp, Webpack, Grunt) In terms of Mobile Development, I can create projects using the following: • Java • Kotlin • Swift • Object-C • Android/iOS • Ionic Framework • React Native • Dart/Flutter I’ll happily sit down and work with you to build the best possible plan of attack to create and perfect your vision! less -
Hire scriptersZ
We are Codesigma Technology Services, a full-stack development agency based in India with 10+ years of delivering complex, production-ready applications. Our founder and top developers have experience working with Inc. 5000 companies and professional teams across the world, bringing a strong understanding of diverse,...We are Codesigma Technology Services, a full-stack development agency based in India with 10+ years of delivering complex, production-ready applications. Our founder and top developers have experience working with Inc. 5000 companies and professional teams across the world, bringing a strong understanding of diverse, multicultural work environments to every project. We are a tight team of experienced developers - small enough to move fast, experienced enough to build right. You always work with the most senior person, not a project manager who delegates to juniors. What we've built: -> Cross-platform POS system - React, Firebase, Flutter, Electron - running on Web, Android, iOS, macOS, and Windows with full offline-first functionality and real-time sync -> Multi-channel e-commerce aggregator - unified management of Amazon, Flipkart, Shopify, Meesho, Nykaa orders, inventory, warehouse, and payment reconciliation -> Real-time audio/video interpretation SaaS - Twilio Voice/Video, Task Router, BoostLingo integration, serving a global user base -> Booking systems, media streaming platforms, headless CMS websites, Shopify applications, and WordPress plugins across industries Our technical stack: Frontend: React, Next.js, Angular, JavaScript, TypeScript Backend: Node.js, PHP (Laravel, CodeIgniter), Python Mobile & desktop: Flutter, React Native, Electron.js Real-time: Twilio, Firebase, WebSockets Data: MySQL, MongoDB, PostgreSQL, Firestore Integrations: Stripe, PayPal, Razorpay, Shopify API, Amazon SP-API, GraphQL Infrastructure: AWS, Linux server management, deployment We are the right fit if you need: - A long-term development partner, not a one-off freelancer - End-to-end ownership from architecture to deployment - Cross-platform delivery (web + mobile + desktop from one team) - Complex integrations with third-party APIs and platforms - Clean, documented, maintainable code that your team can take over We work on fixed-price and hourly engagements. For ongoing projects, we offer monthly retainer arrangements. Let's discuss your project. less
