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$20/hr
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🚀 Senior Java Developer | 12+ Years | Enterprise & BFSI Specialist I am a Senior Java Developer with 12+ years of experience delivering secure, scalable, enterprise-grade applications for BFSI and large organizations. I take full ownership of the entire SDLC — from requirements analysis and solution architecture to development, cloud deployment, and long-term production support. 💻 Core Expertise: Java / J2EE, Spring Boot, Spring MVC Microservices Architecture & REST/OpenAPI AWS & Azure (including Azure AI & Amazon Bedrock) High-Availability & Cloud-Native Systems CI/CD, DevOps, Monitoring & Observability 📊 Data & Integration Strength: ELK Stack (Elasticsearch, Logstash, Kibana, Beats) — SIEM, index tuning, dashboards, custom auth plugins Kafka, Hibernate (4/5), JDBC Enterprise Integration Patterns & Reliable Data Processing 🎨 Frontend Capabilities: React.js, AngularJS, ExtJS HTML, CSS, JavaScript (Enabling strong full-stack delivery when required) I am known for being detail-oriented, documentation-driven, and quality-focused, producing architecture designs and technical documentation aligned with enterprise and ISO standards. With strong communication skills and an ownership mindset, I collaborate closely with stakeholders to deliver secure, compliant, production-ready systems that scale and perform under pressure. Java Developer, Senior Java Developer, Scala Developer, Backend Developer, Backend Engineer, Full Stack Developer, Software Engineer, Enterprise Application Developer, Microservices Developer, Spring Developer, Spring Boot Developer, Play Framework Developer, Akka Developer, Actor Model, Distributed Systems, High Concurrency Systems, REST API Developer, GraphQL API, API Development, Backend Architecture, System Design, Application Scalability, Performance Optimization, Multithreading, Big Data Developer, Apache Spark Developer, Apache Camel, OSGi, JBoss Fuse, Event Driven Architecture, Banking Software Developer, FinTech Developer, E-Commerce Backend, Retail Systems, Security Systems, Python Developer, JavaScript Developer, SQL Developer, NoSQL Developer, PostgreSQL, MySQL, Cassandra, DSE Graph, Gremlin, Data Engineering, Cloud Ready Applications, Enterprise Integration, Legacy System Modernization, Code Optimization, Bug Fixing, Production Support, Immediate Availability.
Saurabh S. has worked .
$22.5/hr
100% Job Success
$20K+ earned
Available now
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🏆 React Developer for SaaS MVPs, dashboards, admin panels, customer portals, and API-connected web apps. ✅ 100% Job Success ✅ $20K+ earned on Upwork ✅ 1,024+ Upwork hours ✅ 8+ years building production web applications ✅ 1M+ user product experience through an AI-powered EdTech SaaS platform I build production-ready SaaS products by combining senior full-stack engineering with AI-accelerated development workflows. this helps founders and product teams launch MVPs faster, iterate quickly, and scale confidently without compromising code quality, security, & long-term maintainability. Whether you're validating a new idea, modernizing an existing platform, or scaling a growing SaaS product, I help turn complex requirements into clean, maintainable, and production-ready software. 🔥 WHAT YOU CAN HIRE ME FOR ✔️ SaaS MVP development with React, Next.js, Node.js, TypeScript, and APIs ✔️ Admin dashboards, SaaS dashboards, customer portals, and internal tools ✔️ Full-Stack React development with frontend, backend API workflows, and database logic ✔️ API Integration using REST API, GraphQL, Stripe, Supabase, PostgreSQL, webhooks, and third-party tools ✔️ Existing SaaS platform improvement, bug fixing, refactoring, performance optimization, and feature expansion ✔️ Long-term product support for SaaS apps, MVPs, dashboards, and API-connected web applications Recent wins • Smodin — AI-powered EdTech SaaS used by 1M+ learners • Beambox — analytics dashboard powering marketing for 500+ hospitality venues • Upcall — campaign platform handling 30 000+ outbound calls per day • EasyLlama — HR-compliance SaaS rolled out across 2000+ enterprise teams PRODUCT AREAS I UNDERSTAND ✅ SaaS platforms ✅EdTech products ✅Sales and CRM systems ✅FinTech Dashboards ✅HR Compliance Tools ✅Product intelligence platforms ✅Marketplaces ✅Booking systems & internal business tools CORE STACK ✅Frontend: React, Next.js, TypeScript, JavaScript, HTML5, CSS3 ✅Backend/API: Node.js, REST API, GraphQL, authentication, webhooks ✅Database: PostgreSQL, MySQL, MongoDB, Supabase ✅SaaS Systems: Stripe, subscriptions, dashboards, customer portals, role-based access ✅Cloud Delivery: AWS, CI workflows, deployment support, performance optimization How I work ✔️ Understand goals, users & risks up front ✔️ Split scope into clear milestones ✔️ Design tidy React / Next.js architecture ✔️ Wire up APIs, data, auth & Stripe correctly ✔️ Ship small, testable releases for fast feedback ✔️ Improve existing code via fixes & optimization ✔️ Communicate with concise, actionable updates If you are building a SaaS MVP, dashboard, customer portal, internal tool, or API-connected React / Next.js web application, send me a message and I’ll help you map the best technical approach. Keywords to find me on Upwork: React Developer, Next.js Developer, SaaS Developer, MVP Developer, Full-Stack React Developer, Frontend React Developer, SaaS Dashboard Developer, Dashboard Developer, Admin Dashboard, Customer Portal, Internal Tools, API Integration Developer, REST API, GraphQL, Stripe Integration, Supabase Developer, PostgreSQL, TypeScript, Node.js, AWS, SaaS MVP, Web Application Development, Existing SaaS Platform, Product Scaling, Performance Optimization, Product Rescue
$120/hr
Available now
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Hello. I’m a Y Combinator-backed Senior AI Engineer with 15+ years of experience designing and building scalable software products. Over the last several years, my focus has shifted toward building production-ready AI applications that combine modern LLMs with robust backend engineering, cloud infrastructure, and intuitive user experiences. Whether you’re building an AI startup, launching an MVP, or integrating AI into an existing platform, I can help you architect, develop, and deploy a solution that’s reliable, scalable, and ready for real users. What I Build AI Agents & Multi-Agent Systems Retrieval-Augmented Generation (RAG) AI Copilots Enterprise Knowledge Bases AI Workflow Automation AI Customer Support Assistants AI Sales & CRM Automation AI Document Processing AI Voice Assistants AI SaaS Platforms Internal AI Productivity Tools Custom AI APIs & Integrations AI Technologies LLMs OpenAI (GPT-4.1, GPT-4o) Anthropic Claude Google Gemini Open-Source Models (Llama, Mistral) AI Frameworks LangChain LangGraph LlamaIndex CrewAI AutoGen Model Context Protocol (MCP) Vector Databases Pinecone Weaviate Qdrant pgvector ChromaDB Backend Python FastAPI Django Flask Node.js NestJS Frontend React Next.js TypeScript Cloud & DevOps AWS Azure Google Cloud Docker Kubernetes Terraform GitHub Actions Databases PostgreSQL MongoDB Redis Elasticsearch Industries I’ve worked with startups and enterprise organizations across: Healthcare FinTech SaaS HR Tech E-commerce Logistics Enterprise Software How I Work I don’t simply connect an AI model to your application. I focus on understanding your business, choosing the right architecture, designing scalable systems, and building AI products that people actually use. From discovery and architecture to deployment and long-term support, I work as a technical partner—not just a developer. Clear communication, thoughtful engineering, and delivering business value are what I prioritize on every project. If you’re looking for someone who can own the technical side of your AI product and help you build it the right way, I’d be happy to discuss your project.
CodingCops
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CodingCops
$30/hr
100% Job Success
$3K+ earned
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🌐 Java / Spring Boot microservices architecture 🧩 Distributed systems: idempotency, retries, eventual consistency, fault tolerance 📨 Kafka event-driven systems and high-throughput messaging 🗄️ MySQL, Redis, Elasticsearch for performance, caching, and search 🛡️ System reliability: observability, graceful degradation, resilience patterns 💳 Payment systems: Stripe, PayPal, Shopify integrations, reconciliation, and failure recovery 🔐 Security & IAM: Keycloak, OAuth2, OpenID Connect, RBAC, multi-tenant design 🤖 AI Agent development: LLM-powered agents, RAG systems, workflow automation, tool integration, evaluation, and guardrails 🎙️ Communication & real-time systems: Twilio,Telnyx, WebRTC, LiveKit, messaging, voice, notifications, and low-latency audio/video platforms
Anton  V.
$40/hr
$2K+ earned
Offers consultations
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𝗣𝗿𝗼𝘃𝗲𝗻 𝟭𝟱+ 𝗬𝗲𝗮𝗿 𝗧𝗿𝗮𝗰𝗸 𝗥𝗲𝗰𝗼𝗿𝗱 𝗶𝗻 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝗶𝗻𝗴 𝗥𝗼𝗯𝘂𝘀𝘁 𝗪𝗲𝗯 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 I'm a seasoned Full Stack / Mobile Developer with a passion for crafting exceptional digital experiences. My extensive skill set allows me to seamlessly navigate both frontend and backend development as well as Android / iOS development, ensuring optimal performance and user satisfaction. 𝗖𝗼𝗿𝗲 𝗖𝗼𝗺𝗽𝗲𝘁𝗲𝗻𝗰𝗶𝗲𝘀: • 𝗙𝗿𝗼𝗻𝘁-𝗘𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: HTML5, CSS3 (including preprocessors like SASS), JavaScript (frameworks like React.js, Vue.js, Angular), Bootstrap, Chart.js, jQuery • 𝗕𝗮𝗰𝗸-𝗘𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: PHP (frameworks like Laravel, CodeIgniter, Symfony), Python (Django, Flask), Node.js (Express) • 𝗔𝗻𝗱𝗿𝗼𝗶𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Proficient in Java, Kotlin, Android Studio, and the Android SDK. • 𝗶𝗢𝗦 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Adept in Swift, Objective-C, Xcode, and the iOS SDK. • 𝗖𝗿𝗼𝘀𝘀-𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Well-versed in React Native, Flutter, and Xamarin. • 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀: WordPress, Yii2 • 𝗣𝗮𝗰𝗸𝗮𝗴𝗲 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁: NPM, Composer • 𝗔𝗣𝗜𝘀 & 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: REST API, Figma, Materialize • 𝗖𝗹𝗼𝘂𝗱 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀: AWS Lambda, Azure SQL Database • 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀: MongoDB, Redis, Microsoft SQL Server, PostgreSQL, MariaDB, MySQL, SQLite • 𝗗𝗲𝘃𝗢𝗽𝘀 & 𝗗𝗲𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁: Docker, Vagrant, RabbitMQ, AWS SQS, AWS SNS, Heroku, OpenShift • 𝗦𝗰𝗮𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆 & 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲: Elasticsearch, Database Profiling, Code Profiling, Microservices • 𝗩𝗲𝗿𝘀𝗶𝗼𝗻 𝗖𝗼𝗻𝘁𝗿𝗼𝗹 & 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: Git, SVN, Jenkins • 𝗧𝗲𝘀𝘁𝗶𝗻𝗴 & 𝗠𝗼𝗻𝗶𝘁𝗼𝗿𝗶𝗻𝗴: Selenium, ESLint, Sonar • 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗧𝗼𝗼𝗹𝘀: Vim, webpack, IntelliJ IDEA, Postman, Fiddler • 𝗖𝗼𝗺𝗺𝗮𝗻𝗱 𝗟𝗶𝗻𝗲: Zsh, Bash, csh, PowerShell • 𝗔𝗱𝗱𝗶𝘁𝗶𝗼𝗻𝗮𝗹 𝗦𝗸𝗶𝗹𝗹𝘀: Lodash, Ionic, Vuex, Redux, GraphQL, OAuth, Agile Methodologies (Scrum, Kanban), Page Object Pattern, E2E Testing, AWS (S3, EC2, LogWatch, MediaConvert, Step functions, Lambda functions, AWS CLI) 𝗟𝗲𝘁'𝘀 𝗕𝘂𝗶𝗹𝗱 𝗦𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝗚𝗿𝗲𝗮𝘁 𝗧𝗼𝗴𝗲𝘁𝗵𝗲𝗿! I thrive in collaborative environments and am eager to tackle challenging projects. My focus is on delivering high-quality, efficient, and scalable solutions. 𝗥𝗲𝗮𝗱𝘆 𝘁𝗼 𝗱𝗶𝘀𝗰𝘂𝘀𝘀 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗻𝗲𝗲𝗱𝘀? 𝗟𝗲𝘁'𝘀 𝗯𝗿𝗶𝗻𝗴 𝘆𝗼𝘂𝗿 𝘄𝗲𝗯 𝘃𝗶𝘀𝗶𝗼𝗻 𝘁𝗼 𝗹𝗶𝗳𝗲!
Dmitriy M.
$60/hr
100% Job Success
$400K+ earned
Available now
Offers consultations
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Every hour of downtime costs your enterprise an average of $540,000. That's not a DevOps metric - that's a board-level problem. I design and operate infrastructure that stays up. My specialty is the full observability and reliability stack: detecting failures before users do, recovering in minutes, not hours, and building the self-healing systems that let your engineering team sleep at night. With $400K+ earned on Upwork, 100% Job Success Score, and 10+ years in DevOps and Site Reliability Engineering, I bring the broadest monitoring stack you'll find in one engineer: Prometheus · Grafana · Datadog · ELK Stack · Zabbix · Sumo Logic - combined with deep Kubernetes and cloud expertise. Typical Problems I Solve → Production incidents are frequent, and MTTR is too high → No observability - issues discovered by users, not monitoring → Need DevOps engineer for high availability infrastructure setup → Kubernetes clusters experiencing performance or reliability issues → Disaster recovery plan missing or untested → AI workloads need reliable, observable infrastructure Proven Client Results ▪️ iLost Platform (Netherlands) → Challenge: EKS performance degrading, CI/CD unstable across Dev/Staging/Production, and OpenSearch causing timeouts. → Solution: EKS rightsizing, CI/CD pipeline optimization, IAM hardening, OpenSearch performance tuning. → Business Impact: Reduced bottlenecks, improved release predictability, and optimized infrastructure costs. ▪️ Qopla Infrastructure → Challenge: Long-term SRE engagement - ongoing reliability, monitoring, and performance needs. → Solution: Continuous SRE operations, incident management, and infrastructure optimization. → Business Impact: 657-hour engagement demonstrating sustained impact. Rate progressed $40/hr → $52/hr based on results. ▪️ GetChecked (Blockchain / Multi-cloud) → Challenge: Multi-cloud infrastructure (AWS + DigitalOcean + bare-metal) with Hyperledger Fabric in a regulated environment. → Solution: Upgraded Hyperledger Fabric, implemented monitoring, backup, DR/BCP, optimized CI/CD pipelines. → Business Impact: Increased system reliability and security in a strict regulatory context. Core SRE Capabilities → DORA metrics: Deployment Frequency, Lead Time, MTTR, Change Failure Rate - measured and improved → Incident Management & On-Call: Runbooks, escalation paths, post-mortems → Disaster Recovery & Business Continuity planning and testing → Zero Trust Security: IAM, RBAC, SELinux, network hardening → High Availability: Multi-AZ, failover, load balancing, autoscaling → AI workload reliability: observability for ML pipelines and LLM infrastructure Stack: AWS · GCP · Kubernetes · Terraform · Ansible · Prometheus · Grafana · ELK Stack · Datadog · Zabbix · Docker · Linux · GitHub Actions · GitLab CI · Incident Response Plan · Disaster Recovery Available during US business hours (EST/PST overlap). Downtime is a solved problem - if you have the right observability. Send an invite and let's audit your reliability posture.
Spaceport
Associated with
Spaceport
$1M+
earned
Denis Y.
$45/hr
100% Job Success
$200K+ earned
Available now
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Hey! I am a CEO, Full Stack Developer, and React Developer with over 12 years of commercial experience. My journey began with deep back-end engineering, but over time it naturally evolved into full-cycle product creation - from architecture planning to deployment and long-term support. The common thread across every project is the perspective of a React Developer who treats every interface as a product decision, not just a visual layer. What I do My work as a React Developer covers the full stack - from crafting fast, clean React interfaces to designing AWS infrastructure and API orchestration behind the scenes. With 5,800+ hours logged on Upwork and 100+ projects delivered, I take full ownership of every product I touch. That is what the role of a React Developer means to me: accountability for the entire user-facing layer, not just the components. Thinking like a React Developer means making deliberate decisions at every layer - from component architecture to state management and API design. My technical stack React Developer experience means mastering the entire frontend layer. I build with React.js, Next.js, TypeScript, Tailwind CSS, Astro, Angular, and Vue 3. For mobile, my background as a React Native Developer means I apply the same component-driven discipline across platforms — working with React Native (Expo), Flutter, Swift, and Kotlin. Every stack decision is guided by performance, maintainability, and long-term scalability - values I bring to every project as a React Developer. On the back end, I match the same depth: Node.js, Python (FastAPI, Django), Ruby on Rails, Go, and Java. My cloud infrastructure expertise spans AWS Lambda, S3, and CDK/SST - the kind of foundation a serious React Developer build demands. Bridging frontend precision with back-end reliability is what separates a strong React Developer from someone who only knows one side of the stack. That balance is something every experienced React Developer has to earn and I have. What I build Having worked as a React Developer across Fintech, HealthTech (including HIPAA-compliant data handling, audit logging, and role-based access control), SaaS, AI and Automation, Real Estate, and Event Management, I understand what it takes to build products that scale under real pressure. The range of what I have delivered as a React Developer includes AI-driven MVPs, C2C marketplaces, PropTech platforms, and complex enterprise systems with high concurrency requirements. Each engagement starts with the business problem, not the ticket. I think system-wide, design for scale, and stay involved from the first architectural decision to final deployment. Clean logic, performance optimization, and secure data handling are the standards every React Developer should hold and I do throughout every build. React Developer instincts, built over 12 years, mean I can spot performance bottlenecks and architecture risks before they become expensive problems. Why clients hire me Clients return to me as their React Developer because I bring more than technical skill - I bring the mindset of a CEO who has built and shipped real products. Hiring a React Developer with that perspective means you get someone who understands what it costs when a system breaks, what it takes to scale under pressure, and what users actually need from a frontend. My React Developer background spans over a decade of production systems built for real users at real scale, not side projects. Finding the right React Developer for a complex product matters. I have helped businesses modernize legacy systems, migrate to AWS, and launch products from zero to production. Whether the challenge is a greenfield SaaS build or a rescue engagement, I bring structure, reliability, and full-stack depth as a React Developer. That combination is what defines this React Developer practice and the reason clients come back. The strongest React Developer is not just someone who writes clean code - it is someone who stays involved until the product ships and performs. If you are looking for a React Developer who thinks beyond the ticket, I would be glad to connect. Let's build something great.
Faster Than Light
Associated with
Faster Than Light
$20K+
earned
$70/hr
100% Job Success
$900K+ earned
Available now
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I work with engineering leaders and CTOs who are scaling fast but fighting the same battles: deployments that take hours, environments that drift, DevOps bottlenecks that block every release, and infrastructure that isn't ready for AI workloads. I eliminate those bottlenecks - permanently. With 90+ completed projects, $900K+ earned on Upwork, and a 100% Job Success Score, I've led infrastructure transformations across Fintech, Healthcare, E-commerce, and SaaS - delivering measurable outcomes that show up on the P&L, not just in a CI/CD dashboard. Typical Problems I Solve → Deployments take hours instead of minutes → Infrastructure costs keep growing without visibility → DevOps bottlenecks block engineering teams → Kubernetes environments become difficult to maintain → AI initiatives are delayed because infrastructure isn't ready → Need a DevOps engineer for cloud migration or infrastructure audit Proven Client Results ▪️ HRM Platform → Challenge: Deployments took 3 hours, causing constant developer delays and release anxiety. → Solution: Docker parity environments + fully automated CI/CD pipeline across all environments. → Business Impact: Deployment time cut from 3 hours to 2 minutes - 98% improvement in release speed. ▪️ Connectivity Platform → Challenge: Provisioning a new environment took 1.5 weeks, blocking team velocity. → Solution: Infrastructure automation with Terraform + CI/CD pipeline standardization. → Business Impact: Provisioning time cut to 1 hour. 200-300 monthly automated deployments. Team efficiency +30-35%. ▪️ Zmyle (German E-commerce, 17+ multi-tenant sites) → Challenge: Legacy infrastructure couldn't handle Christmas peak traffic across 17 sites. → Solution: Full migration to Kubernetes with CI/CD, monitoring stack (Prometheus/Grafana/ELK), and VPN. → Business Impact: Zero downtime during peak season. Scalable multi-tenant architecture now handles 10x traffic spikes. What Working With Me Looks Like → DORA metrics-driven delivery - Deployment Frequency, Lead Time, MTTR, Change Failure Rate measured and improved → Zero-Drift Infrastructure - no more 'works on my machine' incidents → FinOps awareness built into every pipeline - cost visibility is not an afterthought → AI-ready infrastructure - prepared for LLM workloads, GPU orchestration, and vector databases → Full observability stack: Prometheus, Grafana, ELK, Datadog - you see everything I lead a team of Senior DevOps Engineers and Cloud Architects. Whether you need a one-time infrastructure audit or a long-term engineering partner - I structure engagements around your business outcomes, not billable hours. Industries: Fintech · Healthcare · E-commerce · SaaS · Blockchain Stack: AWS · GCP · Azure · Kubernetes · Terraform · GitOps · ArgoCD · Prometheus · Grafana · GitHub Actions · GitLab CI · Docker · Ansible · AI workloads Available during US business hours (EST/PST overlap). Ready to cut your deployment time and infrastructure costs? Send an invite - the first conversation is about your goals, not my resume.
IT Svit
Associated with
IT Svit
$800K+
earned
Serhii K.
$34.99/hr
100% Job Success
$400K+ earned
Available now
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🟢 AVAILABLE TO CHAT Have a complex product idea? I launch high-performing web applications and scalable SaaS platforms without missing deadlines. I am an expert full stack developer building production-grade AI SaaS products now. As an AI developer, I design high-load node.js developer backend infrastructure solutions. With over 12 years of hands-on engineering experience, I focus on moving fast. I have helped clients launch scalable digital web platforms that generated over $10M. My development process follows strict engineering standards. This ensures your software infrastructure scales easily without needing costly architectural rewrites. My engineering stack is deeply focused on robust, production-ready modern web technologies. I act as a nestjs developer to architect scalable modular monoliths and systems. As a next.js developer, I deliver secure frontend applications and TypeScript logic. I am a react developer building responsive user interfaces with strict auth layers. I manage heavy data loads using PostgreSQL, MySQL, AWS cloud, and Redis caching layers. Every application is built with strict client-side and server-side traffic security boundaries. Artificial Intelligence integration is a core part of my current development stack. I am a langchain developer building autonomous agents and context-aware AI applications. As an openai developer, I deploy production-ready rag pipeline developer solutions for clients. My experience covers deep API flows with OpenAI models and Anthropic Claude assistants. I connect complex frontend flows to backend processing via a clean state layer. I handle real-time frame analysis, video pipelines, and voice integrations with Twilio. I operate as a saas developer to resolve heavy backend business logic problems. I implement secure multi-provider payment orchestration, Stripe subscriptions, and tokenized billing flows. My code reliably handles multi-provider routing, external decline codes mapping, and idempotent retries. I ensure stable webhook handling and real-time frontend synchronization under heavy production traffic. You get direct developer-to-client communication without slow, unnecessary project management layers. Why should you hire me as a Full Stack Developer? * I offer 12+ years of expertise as a senior full stack developer. * Shipped a custom ai saas react application from scratch in 6 weeks. * Built 10+ secure next.js developer interfaces tied to robust nestjs backend architectures. * Handled 500K+ enterprise documents inside an optimized pgvector and langchain RAG pipeline. * Reduced onboarding time by 70% while improving infrastructure system performance metrics. * Decreased backend API infrastructure costs by 40% using smart model routing layers. * Completed a 100% seamless payment migration for active customer subscription processing flows. * Managed a technical engineering team of 6 developers during a complex architecture refactoring. * Deployed 20+ production modules including checkout systems and real-time data sync tools. * Successfully delivered 25+ completed software development contracts with a 100% JSS rating. * Created 10+ scalable web application architectures generating maximum business growth for clients. * My technical portfolio contains deep api integration examples. Let's build your scalable MVP or perform a thorough security and performance pass. Send a message or hit Invite to schedule a quick introduction chat.
Rezet
Associated with
Rezet
$400K+
earned
$40/hr
100% Job Success
$30K+ earned
Available now
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I scaled a Pan India job platform from 0 to 2 million users in 1 year — sole architect, sole engineer, full AWS infrastructure. That's not a team effort I'm describing. That's what I do when a founder trusts me with their product. With 15+ years in software development and 9+ years building production SaaS on the MERN stack, I specialize in one thing: taking an early-stage product from whiteboard to live, scalable system without the founder needing to manage me. I've built and shipped multi-tenant SaaS platforms with RBAC, Stripe billing, real-time features, and third-party integrations at scale. I set up AWS infrastructure from scratch, EC2, RDS, S3, CI/CD pipelines, and hand it over documented and production-ready. My engagement style is iterative: you see working software every week, not a big reveal at the end. What I build for early-stage SaaS founders: ✅ Multi-tenant architecture with role-based access control from day one ✅ Subscription billing via Stripe: plans, trials, webhooks, invoicing ✅ REST and GraphQL APIs built to scale, not just to work ✅ Next.js frontends that are fast, clean, and maintainable ✅ Real-time features: notifications, live dashboards, WebSockets ✅ AWS infrastructure built right, not duct-taped together ✅ Third-party integrations done properly with error handling and retry logic ✅ Weekly demos so you always know exactly where your product stands Tech I work with daily: Backend: NodeJs, ExpressJs, TypeScript, GraphQL, REST APIs, SocketIO Frontend: NextJS, ReactJS, Tailwind CSS, TypeScript Databases: PostgreSQL, MongoDB, MySQL, Redis, Elasticsearch Cloud: AWS (EC2, S3, RDS, Lambda, SES, SNS, CloudWatch, Route53, Fargate) DevOps: Docker, Kubernetes, GitHub Actions, CICD, Terraform, NGINX Payments: Stripe Auth: JWT, OAuth 2, AWS Cognito How I work: I consult on architecture before writing a single line of code. I ask uncomfortable questions early so there are no surprises late. I write code that the next engineer can read. I deliver on the timeline I quote — a recent client got their full deployment done in 1 day against a 3-day estimate. That's not luck, that's how I work. If you are a founder who needs one engineer to own the product end-to-end and ship without hand-holding, that's exactly the engagement I'm built for. Let's talk about what you're building.