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Svyatoslav M.
$41/hr
100% Job Success
$700K+ earned
Available now
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Hi! I'm a Senior Generative AI & Full-Stack Engineer with 15+ years of experience specializing in building production-ready AI applications, Custom Chatbots, and Multi-Agent systems. Are you looking to bridge the gap between advanced Artificial Intelligence and a robust, production-ready web architecture? I deliver scalable, secure, and smart technical solutions that turn complex business ideas into high-performing digital products. I combine deep expertise in foundational backend/frontend stacks with cutting-edge Generative AI engineering. Whether you need an autonomous AI Agent framework, a high-accuracy RAG pipeline, or a complex enterprise web application, I handle everything from core architecture to seamless UI deployment. Please look at my portfolio below to see my "ML-Based Price Recommendation System", "AI-Powered HR Application Full Stack Development", "Full-Stack Developer For Custom ERP", and many others. Core AI & Machine Learning Expertise: - Large Language Models (LLMs): Custom integration, API optimization, and fine-tuning with OpenAI, LLaMA, Claude, etc. - Advanced RAG Systems: Building intelligent Retrieval-Augmented Generation architectures to connect LLMs with private corporate data sources, minimizing hallucinations. - AI Agents & Conversational Systems: Development of autonomous multi-agent workflows, AI chatbots, smart routing systems, and NLP tools (LangChain, LlamaIndex). Robust Full-Stack Stack: - Backend: Node.js, Express.js, PHP (Laravel, Yii), Python, API Integration, and high-load architecture. - Frontend: React.js, Next.js, and modern JavaScript for intuitive, interactive AI user interfaces. - Databases & Cloud: Vector databases (Pinecone, Chroma), PostgreSQL, MySQL, and secure cloud deployment via Amazon Web Services (AWS Partner & Certified Cloud Practitioner) and GCP. Why Work With Me: - 100% Job Success & Top Rated Plus: A proven track record of delivering clean code, meeting strict deadlines, and maintaining clear communication. - Business-Centric Approach: I don't just write code; I design systems that optimize internal workflows, improve user retention, and cut operational costs. - Agile Integration: backed by the engineering strength of the Greenice team, allowing for rapid scaling if your project requires additional resources. Let’s turn your vision into a production-ready application. Click the "Invite to Job" button, and let’s discuss the technical architecture of your project!
Greenice
Associated with
Greenice
$4M+
earned
$20/hr
96% Job Success
$100K+ earned
Available now
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I help startups and businesses build scalable web applications, real-time communication platforms, SaaS products, AI-powered solutions, and online marketplaces from idea to production. With expertise in the MERN stack and modern cloud technologies, I develop high-performance applications that are secure, scalable, and designed for growth. 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐇𝐞𝐥𝐩 𝐘𝐨𝐮 𝐁𝐮𝐢𝐥𝐝 ✅ 𝐒𝐚𝐚𝐒 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 Multi-tenant SaaS platforms Subscription and billing systems Admin dashboards and analytics User authentication and role management ✅ 𝐑𝐞𝐚𝐥-𝐓𝐢𝐦𝐞 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 WebRTC-based video/audio calling Live streaming platforms Agora integration Real-time chat and messaging Screen sharing and conferencing solutions ✅ 𝐀𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 OpenAI and LLM integrations AI chatbots and assistants AI workflow automation RAG systems and knowledge bases Custom AI features for web applications ✅ 𝐌𝐚𝐫𝐤𝐞𝐭𝐩𝐥𝐚𝐜𝐞 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 Multi-vendor marketplaces Service marketplaces Booking and scheduling systems Payment gateway integrations Order and inventory management 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 Frontend: React.js, Next.js, TypeScript, JavaScript, Redux, Tailwind CSS Backend: Node.js, Express.js, NestJS Database: MongoDB, PostgreSQL, MySQL Real-Time & Streaming: WebRTC, Agora, Socket. IO, Live Streaming AI: OpenAI, Claude, Gemini, LangChain, Vector Databases Cloud & DevOps: AWS, Docker, CI/CD, Vercel, DigitalOcean 𝐖𝐡𝐲 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞? Clean, scalable, and maintainable code Strong communication and transparent updates Startup and product development experience Focus on performance, security, and user experience Long-term support and collaboration Whether you need a SaaS platform, a marketplace, a real-time communication system, or an AI-powered application, I can help turn your idea into a production-ready product. Let's discuss your project and build something great together. 🚀
Vikrant T. has worked .
Richest soft
Associated with
Richest soft
$1M+
earned
Muhammad Jawad A.
$30/hr
100% Job Success
$200K+ earned
Offers consultations
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Full-stack developer specializing in React and Node.js with 15+ years building production SaaS applications for startups and enterprises. Proven track record delivering scalable solutions including complex multi-tenant applications, API-first architectures, and high-performance frontend systems. Recent focus includes AI integration using LLM APIs and RAG pipelines for production systems. Core expertise: - React and Next.js frontend development (TypeScript, responsive design, performance optimization) - Node.js backend systems (RESTful APIs, database architecture, scaling) - Full-stack SaaS platforms (multi-tenant architecture, subscription systems, complex features) - AI integration (LLM APIs, RAG systems, production AI workflows) - Enterprise-scale applications (complex codebases, performance optimization, system architecture) Technical stack: React, Next.js, TypeScript, Node.js, PostgreSQL, Python, AWS Experience: Delivered 30+ SaaS products and complex applications. Senior roles at Roadmunk and Barnes & Noble. Built systems serving millions of users across 40+ countries. Extensive experience with large codebases (300K+ lines), performance optimization, and enterprise architecture. Client testimonials: "Jawad is an excellent engineer who's taken important roles for Aura's engineering team." — Steve Lee, CEO at Aura Health "He was able to familiarize himself with a 300K+ line TypeScript codebase very quickly and started contributing almost immediately." — Zenon "His experience is broad, handling AWS servers, to identifying issues causing CPU surges. Our application is running smoothly and can handle heavier usage due solely on his skills, knowledge and dedication." — Kethleen I., Co-founder
Muhammad Jawad A. has worked .
Zohaib K.
$35/hr
100% Job Success
$200K+ earned
Available now
Offers consultations
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I've spent 5+ years as the lead full-stack behind Vonza, a SaaS platform now generating $75K+ MRR, competing directly with Kajabi and Teachable. I build systems that scale with your business because I care about two things: the quality of code and the outcome it produces. I am Zohaib, a Full Stack Developer with 10+ years of experience, specializing in React, Node.js, Next.js, TypeScript and AI integration. I run a small senior team at Innovation Insight and take full ownership end to end. No hand-offs, no disappearing after onboarding. 𝗧𝗿𝗮𝗰𝗸 𝗥𝗲𝗰𝗼𝗿𝗱 100+ projects delivered on Upwork 20 production SaaS platforms with live users and real revenue 5+ year partnership with Vonza generating $75K+ MRR 30+ interconnected apps shipped for PaintNite/Yaymaker on multi-cluster Kubernetes Production AI systems in live products: RAG pipelines, chatbots, AI agents Full ownership from database schema through CI/CD to production monitoring 𝗪𝗵𝗮𝘁 𝗜 𝗛𝗮𝘃𝗲 𝗕𝘂𝗶𝗹𝘁 Vonza | $75K+ MRR. Five-plus year engineering partnership building an all-in-one online business platform competing with Kajabi and Teachable. As lead Full Stack Developer I architected the complete system: React/Next.js frontend, Node.js/NestJS backend, MongoDB, Stripe Connect billing, OpenAI-powered features and 16+ integrated tools covering courses, communities, funnels and CRM. PaintNite | 30+ apps on multi-cluster Kubernetes. Led full modernization from React 16 to Next.js 15, React 19 and TypeScript across 30+ interconnected applications. Multi-tenant architecture at enterprise scale. The project I point to when clients ask if I can handle real complexity. GovDoc.ai | AI contract intelligence. RAG pipelines using AWS Bedrock and Cohere embeddings that transform federal contracting PDFs into 50+ extracted data points. Multi-tenant, semantic search, deep document analysis. My strongest proof that I ship real AI systems, not demos. Patrol6 | Enterprise IoT security SaaS. AI-powered video incident analysis with Google Vertex AI, real-time GPS tracking and AWS IoT Core device management. I built the complete backend, API architecture and security operations console. Every one of these is live, serving real users, handling real money. 𝗪𝗵𝗮𝘁 𝗜 𝗛𝗲𝗹𝗽 𝗬𝗼𝘂 𝗕𝘂𝗶𝗹𝗱 AI Integration & AI-Powered Products. Production-grade AI inside real products: RAG pipelines trained on your own data, AI chatbots and sales agents that capture leads, document intelligence, OpenAI / AWS Bedrock integration. Not prototypes, AI features running in revenue-generating platforms today. SaaS Platforms and MVPs. I help you define MVP scope, plan the architecture and build a scalable SaaS platform ready for real users: database schema, API design, React frontend, AWS deployment, Stripe subscription billing, multi-tenant architecture, onboarding flows and CRM. React and Next.js Web Applications. Modern frontends for SaaS dashboards, admin portals and multi-tenant platforms. TypeScript throughout. Component libraries that scale across white-label products. Recent work: influencer marketplace design system, B2B dashboard for a 3D configurator, enterprise security console. Backend Systems and APIs. Node.js and NestJS systems handling business logic, auth, integrations and databases. REST and GraphQL APIs built to scale. Integrated in production: Stripe, PayPal, Twilio, OpenAI, AWS Bedrock, Mapbox, HubSpot, SendGrid and more. React Native Mobile Apps. Three production apps live on App Store and Google Play with real users, in-app purchases, push notifications and offline-first architecture. I handle both the mobile frontend and the backend APIs powering it. 𝗠𝘆 𝗦𝘁𝗮𝗰𝗸 Frontend: React, Next.js, TypeScript, Tailwind, Redux, Zustand Backend: Node.js, NestJS, Express, Python, FastAPI AI: OpenAI API, AWS Bedrock, RAG pipelines, Cohere embeddings, AI agents, chatbots, Vertex AI, all in production. Workflow accelerated with Claude Code. APIs: GraphQL, REST, tRPC Databases: PostgreSQL, MongoDB, MySQL, DynamoDB, Redis Cloud: AWS Lambda, S3, ECS, Cognito, Bedrock, Azure, Google Cloud DevOps: Docker, Kubernetes, CI/CD Mobile: React Native 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸 I respond within hours during business days. I send proactive status updates. I flag risks early instead of at the deadline. If something in your spec will cost you money down the line, I tell you before we start, not after. Message me with your project details. I'll come back within one business day with a real estimate, a suggested approach and 2–3 relevant examples from my portfolio.
Zohaib K. has worked .
Innovation Insight
Associated with
Innovation Insight
$100K+
earned
$15/hr
100% Job Success
$300K+ earned
Available now
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I excel in establishing robust foundations for product development with a high-caliber development team, specializing in both on-premise and cloud-based solutions. My expertise spans AI Agents and AI Solutions, Video Editing and Streaming Solutions, Blockchain, SaaS, AI, and IoT applications, driving digital transformation with a strategic approach to technology. Technical Proficiencies: 1. Languages: Java, Node.js, Python, TypeScript, JavaScript, Apache Groovy 2. Frameworks: Spring Boot, Spring, Express.js, NestJS, Django 3. Databases: MySQL, PostgreSQL, MongoDB, ElasticSearch, Redis, Neo4j 4. Architecture: Microservices, Serverless, Monolithic 5. Cloud Expertise: AWS, GCP, Azure 6. AI : OpenAI, Tensorflow, Deepseek, Langchain, Pinecone, ChromaDB Full Stack Development: With around 12 years of experience, I leverage a broad spectrum of technologies to meet diverse business needs. My toolkit includes Angular, Node.js, Express.js, Django, Lucene, Jenkins, and Spring Boot, enabling me to deliver complex projects effectively. My proficiency in high-level languages ensures comprehensive, high-quality solutions. AI Agent, AI Chatbot, and AI Application Development: I build Generative AI-powered Agents, Chatbots, and AI apps for automation and human-like interactions. With expertise in LLMs, NLP, deep learning, and real-time AI, I develop scalable solutions using OpenAI, LangChain, TensorFlow, and PyTorch. My work spans AI-driven automation, SaaS integrations, and conversational AI for support, analytics, and enterprise workflow Security Compliance: My focus on security ensures robust protection and adherence to industry standards: 1. SOC2: Implementing SOC2 compliance measures to secure data and provide assurance on security, availability, processing integrity, confidentiality, and privacy. 2. OKTa: Utilizing OKTa for secure single sign-on (SSO) and user authentication to enhance security and streamline access management. 3. Encryption: Applying encryption protocols to safeguard sensitive information in transit and at rest. 4. Nginx Security: Configuring Nginx for enhanced web server security with rate limiting, IP whitelisting, and SSL/TLS configuration. 5. Continuous Improvement: Exploring and integrating advanced security practices and tools to stay ahead of emerging threats. Microservice Architecture: I design and implement microservice architectures to build scalable, resilient, and flexible systems: 1. Modern Architecture: Breaking applications into modular services to support independent development, deployment, and scaling, enhancing agility. 2. Scalability: Facilitating granular scaling and efficient resource management to handle varying loads effectively. 3. Deployment: Utilizing cloud environments (AWS, GCP) with Kubernetes, serverless computing, and auto-scaling, as well as robust service discovery, load balancing, and inter-service communication for on-premise setups. 4. Resilience and Fault Tolerance: Ensuring operational continuity with redundancy, automated failover, and circuit breakers. 5. CI/CD: Implementing CI/CD pipelines to accelerate build, test, and deployment processes for rapid and reliable updates. 6. Monitoring and Observability: Integrating tools for distributed tracing, metrics collection, and log aggregation to monitor performance and address issues proactively. 7. Security: Applying rigorous security measures for inter-service communication, including encryption, authentication, and authorization. Video Solutions and Video Editing Applications Development: I specialize in developing end-to-end video solutions using technologies like FFmpeg, OpenGL, Fabric.js, and WebAssembly (WASM). My expertise includes: 1. Video Streaming: Creating live and on-demand platforms with low-latency, high-quality streaming, supporting HLS and DASH for adaptive bitrate. 2. Video Editing: Building custom editors using Fabric.js, HTML5 Canvas, OpenGL, and FFmpeg for video processing and video animations. Users can trim, crop, apply effects, and overlay elements with high flexibility, while OpenGL enhances performance for complex graphics, and FFmpeg enables efficient export of edited videos. 3. WASM & FFmpeg.js Integration: Leveraging WASM for browser-based video processing at near-native speeds, enabling complex tasks like encoding, transcoding, and editing without heavy server reliance. 4. Encoding & Compression: Optimizing video quality and performance using codecs such as H.264, VP9, and AV1, ensuring cross-device compatibility. 5. AI Video Processing: Incorporating AI features like automatic tagging, object detection, and summarization to streamline workflows. 6. Video Transcoding Pipelines: Designing scalable transcoding systems for efficient cloud or on-premise video conversion. 7. Security & Compliance: Implementing DRM, watermarking, and encryption to safeguard content while meeting industry standards. My focus is on delivering performant, scalable, and interactive video experiences.
Abhimanyu A. has worked .
Microcosmworks LLP
Associated with
Microcosmworks LLP
Anders T N.
$56/hr
100% Job Success
$20K+ earned
Available now
Offers consultations
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🟠 𝐓𝐨𝐩𝐑𝐚𝐭𝐞𝐝 🟠 𝟓 ⭐️ 𝐑𝐞𝐯𝐢𝐞𝐰𝐬 🟠 𝟏𝟎𝟎+ 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬 🟠 𝐅𝐨𝐫 𝟏7+ 𝐘𝐞𝐚𝐫𝐬, 𝐈 𝐇𝐚𝐯𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐝 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐓𝐡𝐚𝐭 𝐃𝐫𝐢𝐯𝐞 𝐑𝐞𝐚𝐥 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐑𝐞𝐬𝐮𝐥𝐭𝐬 👉 𝐂𝐡𝐞𝐜𝐤 My 𝐏𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨, you won't be disappointed ;) 🟢 𝐇𝐞𝐫𝐞’𝐬 𝐭𝐡𝐞 𝐝𝐞𝐚𝐥: If you’re looking for just another full stack developer, I’m not your guy. But if you want a senior full stack developer with 17+ years of experience who understands business goals, AI integration, scalability, & long-term ROI, then you’re in the right place 📈 𝐌𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐒𝐞𝐞 𝐑𝐞𝐚𝐥 Business 𝐈𝐦𝐩𝐚𝐜𝐭 → 𝐀𝐥𝐞𝐚 𝐂𝐨𝐧𝐬𝐮𝐥𝐭 𝐆𝐦bH “20% increased efficiency & €900,000 expanded client capacity” → 𝐊𝐥𝐮𝐛𝐚𝐫𝐨: “Quick wins & long-term improvements, delivered fast” → 𝐀𝐜𝐜𝐒𝐞𝐥𝐥𝐞𝐫𝐚𝐭𝐞 𝐒𝐧𝐝 𝐁𝐡𝐝: “Clear milestones, strong architecture, & reliable delivery” 💭 𝐃𝐨𝐞𝐬 𝐓𝐡𝐢𝐬 𝐒𝐨𝐮𝐧𝐝 𝐋𝐢𝐤𝐞 𝐘𝐨𝐮? 🔹“I need a full stack developer who understands business” 🔹“I need someone who knows how to do AI integration in my business” 🔹“I want a React developer who can scale my product” 🔹“I need a WordPress developer who won’t limit growth” 🔹“I need a mobile app developer who thinks end-to-end” 🔹“I need a Node.js or Python developer who builds for the long term” 🤝 𝐖𝐡𝐚𝐭 𝐘𝐨𝐮 𝐆𝐞𝐭 𝐖𝐡𝐞𝐧 𝐘𝐨𝐮 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞 ✅ Clear, proactive communication ✅ Ownership mindset ✅ Scalable architecture decisions & AI integration ✅ Clean, maintainable code ✅ Business-driven technical choices ✅ Agile & Scrum delivery 𝐖𝐡𝐲 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞 𝐚𝐬 𝐘𝐨𝐮𝐫 Full Stack Developer 🔸 Full stack developer with business focus: As a senior full stack developer, I design & deliver full stack development across frontend, backend, infrastructure, & AI API integrations. Clients choose me because I don’t just develop features; I develop systems that generate revenue, reduce operational cost and know how to build AI integration 🔸 React developer, Full stack developer & Web developer all in one I’ve spent 8+ years building high-performance interfaces as a React developer, delivering modern web platforms as a full stack developer using React , Vue , & Angular when the business case demands it. 🔸 WordPress developer ( full stack developer ) Unlike typical WordPress developer 's, I architect secure, scalable WordPress solutions that integrate with API s, CRMs, & custom backends. My experience as a WordPress developer allows businesses to grow without hitting technical ceilings 🔸 Mobile app developer with a full stack developer & AI integration mindset As a mobile app developer, I build mobile applications that integrate seamlessly with backend systems, ensuring performance, security, & long-term maintainability, not isolated apps that break at scale 🔸 React Developer 𝐖𝐡𝐨 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐬 𝐑𝐞𝐬𝐮𝐥𝐭𝐬 and Ai Machine Learning I’m a React developer who has built complex dashboards, SaaS platforms, & high-traffic web applications used by thousands of users daily. My experience as a React developer ensures fast load times, clean architecture. I’ve delivered production-grade solutions using React alongside WordPress backend s, Vue-based micro-frontends, & Angular enterprise modules, always choosing the framework that best fits the business model Clients prefer me as their React developer because I think in systems, not components. ⚙️ Node.js Backend Expert As a backend-focused full stack developer, I deliver as a full stack development only event-driven architectures for production systems. My Node.js experience includes: → High-performance API s → Real-time systems → Secure authentication flows → SaaS platforms integrated with React, Vue, & PHP based systems & AI integration Clients choose me for Node.js development because I design backend s that don’t need to be rewritten when your user base grows. 🧠 Python Developer 𝐟𝐨𝐫 𝐒𝐜𝐚𝐥𝐞 & 𝐈𝐧𝐭𝐞𝐥𝐥𝐢𝐠𝐞𝐧𝐜𝐞 I’m a Python developer with deep experience building data-driven platforms, AI automation systems, & scalable API s. As a Python developer, I’ve worked across industries where performance, reliability, & security are mission-critical. My Python work often integrates with React frontends & JavaScript ecosystems, & I’ve delivered solutions involving Java based systems & machine learning pipelines when data intelligence is required. Clients trust me as a Python developer because I write production code that scales. ⚡ 𝐖𝐡𝐚𝐭 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐒𝐚𝐲 🦸 “As a full stack developer, Anders delivers exceptional quality.” - Soundus Mohamed, Graphic designer at Value Tree. ⭐⭐⭐⭐⭐ 📣 “Enterprise-level development & communication.” Namit Jindal, CEO of Deliverability Ninja. ⭐⭐⭐⭐⭐ ⏱️ “Fast, precise, & reliable.” Justin Weiland, senior finance consultant at Alea Consult GmbH ⭐⭐⭐⭐⭐ Got a full stack development project or AI machine learning ideas? Get in touch & let’s build something that actually moves your business forward. 🤝
Anders T N. has worked .
Smicolon
Associated with
Smicolon
$30K+
earned
Hasnain T.
$30/hr
100% Job Success
$70K+ earned
Offers consultations
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🌟 Top-Rated AI Engineer | Software Engineer | LLM | n8n | React, Next.js, Shopify & WordPress Specialist I help founders and startups turn ideas into fast, scalable, and production-ready MVPs and SaaS applications using modern JavaScript technologies. I specialize in building full-stack web applications with React, Next.js, and NestJS, focusing on clean architecture, performance, and rapid development cycles. My goal is to help you go from idea to a working product quickly—without sacrificing scalability or code quality. I have experience working on production-level applications, including customer-facing platforms and complex frontend systems. I focus on building reusable components, efficient APIs, and smooth user experiences that are ready to scale as your product grows. Whether you're building a new SaaS product, an MVP for investors, or improving an existing system, I can help you design and develop a solid technical foundation. What I can build for you: SaaS platforms (multi-tenant or single-tenant) MVP development for startups Dashboard & admin panels REST / API-driven applications Frontend architecture with React / Next.js Backend services with NestJS / Node.js I care about writing maintainable code, shipping fast, and helping you validate your product idea as efficiently as possible.
Hasnain T. has worked .
Exhodius
Associated with
Exhodius
$10K+
earned
Ketan J.
$24.99/hr
100% Job Success
Available now
Offers consultations
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Building software that solves business problems and supports long-term growth. With 14+ years of experience, I help startups, founders, and businesses build scalable SaaS platforms, AI-powered applications, automation systems, mobile apps, and custom business solutions. What I Can Help You Build • AI-Powered Applications & Chatbots • SaaS Platforms & MVP Development • Custom CRM & ERP Systems • Web Applications & Internal Business Tools • Mobile Apps (iOS & Android) • Workflow Automation & Process Optimization • API Development & Third-Party Integrations • Cloud-Based Scalable Solutions Core Technologies - Frontend: React.js, Next.js, Angular, Vue.js - Backend: Node.js, NestJS, Express.js, Java, Spring Boot, Microservices - Database: PostgreSQL, MySQL, MongoDB, Firebase - Cloud & DevOps: AWS, GCP, Docker, Jenkins, CI/CD - AI & Automation: OpenAI, LangChain, RAG, Pinecone, n8n, Make How I Work • Product-first approach focused on business outcomes • Scalable architecture designed for future growth • Clean, maintainable, production-ready code • Clear communication and transparent delivery process • Strong focus on performance, security, and reliability Why Clients Work With Me Over the years, I have helped businesses launch SaaS products, automate operations, integrate AI capabilities, and build systems that improve efficiency and support growth. Whether you're validating an MVP, scaling an existing platform, implementing AI features, or modernizing internal operations, I can help turn ideas into reliable, scalable solutions. If you're looking for an experienced partner to build a SaaS platform, AI solution, automation system, or custom web/mobile application, let's discuss your project requirements and goals.
Ketan J. has worked .
Valentyn S.
$48/hr
100% Job Success
$200K+ earned
Available now
Offers consultations
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I help startups and B2B SaaS companies build, ship, and scale complete web applications powered by production-grade AI. Instead of hiring separate frontend, backend, and AI infrastructure engineers, I handle the entire product lifecycle — bridging the gap between robust, scalable full-stack architecture (NextJS, NodeJS, Python, AWS) and cutting-edge GenAI implementations (RAG pipelines, autonomous agents, and LLM orchestration). With 10+ years in full-stack development, $200K+ earned on Upwork, and a 100% Job Success Score (Top Rated Plus), I build with an ownership mindset to ensure your MVP hits the market fast and scales smoothly. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🌐 FULL-STACK & AI CAPABILITIES — WHAT I BUILD ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ → Full-Stack SaaS Platforms: Complete web applications with responsive UIs, secure multi-tenant auth, and complex business logic (React, NextJS, TypeScript). → AI Agents & Agentic Workflows: Multi-agent systems capable of autonomous execution, tool usage, and function calling (OpenAI, Claude, Gemini). → Production RAG Pipelines: Enterprise semantic search utilizing vector databases (Pinecone, pgvector, Qdrant) for accurate, private data querying. → Robust Backends & APIs: Highly performant, clean-code REST/GraphQL APIs and microservices (NodeJS, NestJS, Python, Express). → Automated Business Workflows: Intelligent document processing, automated lead scoring, and custom CRM/ERP AI integrations. INDUSTRIES I SERVE WITH AI + WEB SOLUTIONS: - Multifamily Real Estate — Custom web software layered over Yardi, AppFolio, Entrata, ResMan, RealPage, Apartments com - Hospitality / Hotels / Restaurants — AI booking flows, guest communication platforms, and review automation dashboards - MarTech / AdTech — Complete web analytics suites integrated with AdTech and MarTech API, and others like Meta, Google, TikTok, Yelp, and UberEats APIs ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🏆 RESULTS FROM RECENT PROJECTS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✔ AI Voice Agent SaaS Platform — Complete frontend UI/UX redesign + Supabase backend refactor, delivered in 90 days ($7,000 fixed price, 5.0 ★) ✔ Senior NodeJS SaaS Integration — 816 hours of self-driven backend delivery on schedule across 6 months ($32,633, 5.0 ★) ✔ AI-Powered Real Estate Onboarding — Built the web frontend and AI backend workflow that reduced onboarding drop-off and boosted conversions. ✔ Enterprise Software — Systems built by my team are used daily by Cushman & Wakefield (Fortune 500 real estate firm). ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚙️ TECH STACK ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ AI / LLM Integration: OpenAI API, Claude API, Gemini, LangChain, RAG, Vector Databases, Prompt Engineering, Function Calling, Structured Outputs Backend Development: Nodejs, NestJS, Python, Expressjs, Nextjs (Server Components) Frontend Development: React, TypeScript, Redux, Nextjs, Material UI, Tailwind CSS Mobile App Development: Flutter (Cross-platform, CI/CD with Codemagic) Cloud & DevOps: AWS (SQS, SNS, Lambda, RDS, ECS, ECR, CloudWatch, EventBridge, VPC, Route53, EC2), Terraform (IaC), Docker, Docker Swarm, Nginx Databases & Caching: PostgreSQL, MongoDB, MySQL, Redis, Pinecone, Qdrant, pgvector API & Enterprise Integrations (50+ types): REST / GraphQL / SOAP · OAuth2 / OIDC · Webhooks · ETL Pipelines · Payload Encryption ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🏢 ENTERPRISE & THIRD-PARTY INTEGRATIONS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Property Management Systems (PMS): Yardi Voyager · AppFolio · Entrata · ResMan · RealPage · Apartments com Marketing & Social Platforms: Meta (FB/IG) · Google Suite · Twitter/X · TikTok · Yelp · UberEats Past Enterprise Client Impact: STIHL · Liebherr · Cushman & Wakefield ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🤝 HOW WE WORK TOGETHER ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ → Discovery call → System architecture proposal → Milestone-based delivery → MVP in 6–12 weeks, production-ready scaling in 18–32 weeks → Available 30+ hrs/week, response time within 4–8 hours → Backed by a distributed team across 🇺🇦 🇵🇱 🇮🇹 🇷🇴 🇨🇦 if you need to scale resources rapidly I prioritize long-term, high-trust partnerships over quick fixes — 29 completed projects with an average engagement of 12-24 months. Let's jump on a call and map out what you're building.
Valentyn S. has worked .
InterСode 🏆 B2B SaaS software development agency in Advertising & Marketing, Multifamily real estate, Hospitality, Hotels, Restaurants
Associated with
InterСode 🏆 B2B SaaS software development agency in Advertising & Marketing, Multifamily real estate, Hospitality, Hotels, Restaurants
$200K+
earned
Agniva R.
$25/hr
100% Job Success
$100K+ earned
Available now
Offers consultations
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I help founders ship faster. AI-powered mobile apps, MVPs, and SaaS platforms — built right, delivered on time, and ready to scale from day one. Over the last 10 years, I've shipped 150+ products across mobile (Flutter, native iOS & Android), web (Next.js, React), and backend (Node.js, Firebase, AWS). My clients include early-stage startups launching their first MVP and established businesses scaling to hundreds of thousands of users. Where I add the most value: — MVP development & rapid product launches: I help founders go from idea to a fully functional, market-ready MVP in weeks — not months. Lean architecture, fast iterations, and real user feedback from day one. — AI-powered mobile applications: intelligent automation, recommendation engines, conversational AI, and GPT/Gemini integrations built natively into your product — Full-stack SaaS platforms: end-to-end architecture from database design and API development to admin dashboards, payment systems, and deployment — Complex multi-sided platforms: marketplaces, on-demand delivery systems, and subscription-based apps with real-time features, notifications, and role-based access I've also been a founder myself (running a development firm since 2021), so I understand product timelines, budget trade-offs, and what it takes to ship something that actually works in the real world — not just a demo. My process is milestone-driven: we define scope together, I share progress builds at every stage, and nothing ships without thorough testing. You'll always know where things stand. If you're building an MVP, scaling an existing product, or need an AI-powered app that works at scale — send me a message with your project details, and I'll share an honest assessment and a clear roadmap.
Agniva R. has worked .
Aprodence Technologies LLP - Full-Stack Development, Design & Digital Marketing Agency
Associated with
Aprodence Technologies LLP - Full-Stack Development, Design & Digital Marketing Agency
$80K+
earned