Senior Full-Stack SaaS Developer | Node.js, Supabase, AI Integrations & Scalable APIs 𝐈'𝐦 𝐏𝐫𝐚𝐦𝐞𝐞𝐭, a Full-Stack Developer with 6+ years of experience building SaaS platforms, AI-powered applications, scalable APIs, and cloud-native systems for startups and growing businesses. I help founders and teams launch, scale, and optimize products using modern technologies like Node.js, Supabase, React, Next.js, PostgreSQL, AWS, OpenAI, Claude, and Stripe. What I Can Help You Build ✅ SaaS Applications & Multi-Tenant Platforms ✅ AI Applications (OpenAI, Claude, Gemini, RAG, AI Agents) ✅ Custom APIs & Third-Party Integrations ✅ Supabase Applications (Auth, RLS, Realtime, Edge Functions) ✅ Stripe Subscriptions & Marketplace Payments ✅ Admin Dashboards & Internal Tools ✅ Automation Workflows & Business Process Automation ✅ Cloud Infrastructure & Production Deployments Core Expertise ============= Backend Development --------------------------- #Node.js, Express.js, NestJS #REST APIs, GraphQL, Microservices #Authentication & Authorization #Queue Systems & Background Jobs AI & Automation ------------------- #OpenAI, Claude, Gemini #RAG Pipelines #Vector Databases #AI Agents & Workflow Automation #Prompt Engineering Frontend Development --------------------------- #React.js #Next.js #TypeScript #Tailwind CSS Database & Cloud ---------------------- #Supabase #PostgreSQL #MongoDB #AWS #Docker #CI/CD Pipelines ((Why Clients Hire Me)) ==================== ✔ Product-minded developer, not just a coder ✔ Experience taking products from MVP to production ✔ Strong focus on scalability, security, and maintainability ✔ Fast communication and proactive problem-solving ✔ Comfortable working independently or with existing teams Whether you're building an AI startup, SaaS platform, marketplace, automation tool, or scaling an existing product, I can help turn ideas into reliable, production-ready applications. Let's discuss your project and build something exceptional

Experienced in delivering seamless integrations across a diverse ecosystem of platforms: - Marketplaces: Amazon, Zalando, Bol, Winkelstraat.nl, Miinto, Spartoo, GlovoApp, UberEats, DoorDash, Kleertjes, Worten, Grubhub, Deliverect - eCommerce Platforms: WooCommerce, PrestaShop, Shopify, Lightspeed, Magento - CRM & Marketing Automation: Salesforce, Go High Level - ERP & EDI Systems: Odoo, SAP Business One, Microsoft Dynamics, Oracle Cloud ERP Technical Skills - Programming & Frameworks: Node.js, Angular, Next.js, React, Python, Go (GoLang) - Databases: MySQL, MongoDB, DynamoDB, Elasticsearch - Cloud & DevOps: AWS Lambda, Docker - APIs & Data: REST, GraphQL, MCP, A2A Artificial Intelligence & Automation - LLM Providers: OpenAI (GPT-4o, o1), Anthropic (Claude), local models (Ollama, LLaMA, Mistral, Qwen) - Agentic Frameworks: MCP (Model Context Protocol), A2A (Agent-to-Agent), multi-agent orchestration - Memory & Knowledge: RAG pipelines, vector databases, long-term memory, context management - Voice & Video: LiveKit, ElevenLabs, Deepgram - Tooling: Claude Code, Cursor

I build serverless backends on AWS – Node.js, TypeScript, Lambda, DynamoDB. You get one engineer handling infrastructure and code, so there's no coordination mess. My clients typically launch 30–40% faster and save $2K–$5K/month on AWS. I solve complex problems with clean, production-ready solutions. No fluff, no delays – just results that scale.

🚀 AI-First Development for Faster, Smarter iOS Apps I use an AI-first development approach to accelerate coding, debugging, refactoring, and problem-solving—helping me deliver high-quality iOS applications faster without compromising code quality. With 10+ years of iOS development experience, I combine AI-assisted coding with strong hands-on expertise in Swift, SwiftUI, Objective-C, MVVM, Combine, APIs, Firebase, StoreKit, and modern iOS architecture. AI helps me move faster, but every line of code is reviewed, tested, optimized, and validated by me to ensure the final product is reliable, maintainable, and production-ready. AI-assisted. Engineer-driven. Production-ready. What I can help you with ✅ Native iOS Development (Swift, SwiftUI, UIKit, Objective-C) ✅ AI-powered applications * ChatGPT / OpenAI API integration * AI chatbots * AI content generation * AI summarization * AI recommendations * AI-assisted workflows * Integrating LLM APIs into existing applications ✅ Build MVPs faster using AI-assisted development while maintaining clean, scalable, production-quality code. ✅ Join existing teams and work with your current developers. ✅ Take over existing iOS projects and continue development without disrupting your workflow. ✅ Convert legacy codebases * Objective-C → Swift * UIKit → SwiftUI * Older Swift versions → Latest Swift Technical Expertise: • Swift • SwiftUI • UIKit • Objective-C • Combine • MVC • MVVM • VIPER • REST APIs • Firebase • AWS • Python APIs • Cloud Functions • Push Notifications • In-App Purchases & Subscriptions • Universal Links • Deep Linking • Apple HealthKit • BLE / Bluetooth Devices • NFC • QR & Barcode • Core Data • SQLite • Keychain • JWT Authentication • Payment Gateways (Stripe, PayPal) Types of Apps I’ve Built: ✔ Finance Apps ✔ Health & Fitness Apps * Apple Health * BLE wearable devices * ECG * Heart Rate * Sleep Tracking * Health Analytics ✔ Social Networking Apps ✔ E-Commerce Apps ✔ Utility Apps ✔ Music Apps ✔ Chat Applications ✔ Marketplace Applications ✔ Subscription-Based Apps Development Approach: I focus on writing code that is: • Clean • Scalable • Maintainable • Well-structured • Production-ready I follow modern iOS development practices, use Git-based workflows, perform code reviews, create pull requests, resolve merge conflicts, and collaborate efficiently with distributed teams. I’m comfortable working with: * Git * GitHub * GitLab * Bitbucket * Jira * Trello * Asana * Linear I use AI to: * Speed up development * Generate boilerplate code * Refactor legacy code * Improve documentation * Debug complex issues * Create prototypes quickly * Accelerate feature implementation Why Clients Hire Me: ⭐ Strong communication ⭐ Fast response time ⭐ Clean architecture ⭐ Reliable delivery ⭐ Long-term collaboration ⭐ Ability to understand business requirements ⭐ Experience working on existing products as well as greenfield development Client Feedback ⭐⭐⭐⭐⭐ “Dhaval understood exactly what I wanted and exceeded my expectations. Very friendly and great communication. He is highly knowledgeable in his field and goes out of his way to explain technical concepts. The app quality was superb.” ⭐⭐⭐⭐⭐ “Dhaval is a great developer. He delivered everything exactly as requested and maintained excellent communication throughout the project.” ⭐⭐⭐⭐⭐ “Excellent work. Highly recommended.” If you’re looking for a dependable Senior iOS developer who can seamlessly integrate into your team, modernize an existing application, or build a scalable product from scratch, I’d be happy to discuss your project.

I help startups and growing businesses build scalable SaaS products, AI-powered applications, cloud infrastructure, and backend systems that are designed for long-term growth. Over the last 10+ years, I've worked as a CTO, Engineering Manager, and Senior Full-Stack Engineer, helping companies take products from idea to production while keeping performance, scalability, and maintainability at the core. A few projects I've worked on: • PrepLadder (Acquired by Unacademy) Led engineering for a platform serving over **2 million users**, working on AWS microservices, DRM-protected video streaming, personalized learning systems, and large-scale backend architecture. • Enciser Co-founded an IoT and energy management platform where I designed a serverless AWS architecture for real-time device monitoring, mobile applications (iOS & Android), and cloud-based automation. • Enterprise Platforms Built backend systems, cloud infrastructure, and distributed applications for companies including Zucora, TruckBook, Emerald Planet, and Kryptet, using Go, Python, Kubernetes, Docker, Redis, Cassandra, and modern cloud-native architecture. Across my career, I've helped design and deploy 50+ production applications across SaaS, AI, IoT, marketplaces, fintech, and enterprise platforms. My core expertise • Backend Development Python, Node.js, Go, Django, Flask • Frontend React, React Native, Next.js • Databases PostgreSQL, MySQL, MongoDB, DynamoDB, Cassandra, Redis, ScyllaDB • Cloud & DevOps AWS, Docker, Kubernetes, Terraform, Jenkins, GitHub Actions, Ansible • Integrations Stripe, Twilio, OpenAI, Firebase, Shopify, Slack, SendGrid, Google Maps, Zendesk, and other third-party APIs. What I usually help clients with : ✔ Building scalable backend architecture ✔ AI & LLM integrations ✔ SaaS product development ✔ API design and third-party integrations ✔ Real-time applications using WebSockets, MQTT, and event-driven systems ✔ Cloud infrastructure, DevOps, and deployment automation ✔ Engineering leadership and technical architecture What it's like working with me I don't just write code,I help clients make good technical decisions.I'm comfortable joining an existing codebase, understanding how it works, identifying bottlenecks, and delivering features that are easy to maintain as the product grows. I believe in clean architecture, clear communication, proper documentation, and shipping reliable software instead of quick fixes. I've worked with distributed teams across Canada, Australia, Sweden, and India, and I'm equally comfortable working independently or collaborating closely with founders and engineering teams. If you're building a product that needs to scale, I'd be happy to discuss how I can help. ramansaini.in

As a DevOps Engineer with extensive experience in Kubernetes, AWS, GCP, Azure, Docker, AKS, EKS, GKE, Git, Terraform, CloudFormation, Linux, and Bash, I have a proven track record of successfully implementing and managing cloud infrastructure and container orchestration for large-scale projects. I have a strong knowledge of CI/CD pipelines and automation tools, and I am skilled in designing and implementing cost-efficient, highly available, and scalable solutions. I have worked on multiple projects across different domains and have a passion for staying current with the latest technologies and industry trends. With a focus on continuous learning and improvement, I am committed to delivering high-quality solutions that meet the unique needs of each client. Key Skills: • Kubernetes, AWS, GCP, Azure, Docker, AKS, EKS, GKE, Git, Terraform, CloudFormation, Linux, and Bash • CI/CD pipelines and automation tools • Designing and implementing cost-efficient, highly available, and scalable solutions • Project management and cross-functional collaboration • Troubleshooting and problem-solving

I build and scale multi-tenant SaaS platforms, Angular frontends, NestJS/Node.js backends, AWS serverless infrastructure. 8+ years, Top Rated, 100% Job Success. Most of my work is with product teams who need someone to own a feature or module end-to-end: design it, build it, ship it, and keep communicating clearly the whole way through. Recent work includes an Industrial IoT platform running in manufacturing facilities across Europe, and a CRM used by multiple US companies. I've also migrated legacy monoliths into multi-tenant cloud systems and built serverless backends on AWS Lambda, API Gateway, and DynamoDB. What I can help you with: • SaaS product development - Angular + NestJS or .NET Core • Multi-tenant architecture (data isolation, tenant onboarding, role-based access) • AWS serverless: Lambda, API Gateway, DynamoDB, S3, Cognito, CloudFormation • REST & GraphQL APIs, third-party integrations • Modernizing legacy codebases without breaking production If you're an engineering lead or founder who wants a senior developer who asks the right questions upfront and delivers without surprises, let's talk.

🏅 Microsoft Certified: Azure Developer Associate & DevOps Engineer Expert 🏅 AWS Certified Solutions Architect 💡𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 1. Full-Stack Web & Mobile Development ✔ Backend: ASP.NET Core, Node.js, Python (FastAPI), REST/GraphQL APIs ✔ Frontend: Angular, React, React Native, Next.js, Vue.js ✔ Mobile: Cross-platform apps (React Native, Flutter) ✔ CMS/Portals: SharePoint 2013/Online, SPFx Web Parts 2. Cloud & DevOps (Azure/AWS) ✔ Azure: App Services, Functions, Logic Apps, VMs, SQL, Cosmos DB, DevOps (CI/CD Pipelines) ✔ AWS: DynamoDB, Aurora, Lambda, EC2, S3, CloudFormation ✔ Serverless & Microservices Architectures ✔ Migration Specialization – Lift-and-shift, modernization, hybrid cloud 3. AI & Automation ✔ AI/ML Integration: OpenAI, LangChain, Hugging Face (NLP/LLM), FAISS ✔ Models: De Vinci, Ada, Custom Fine-Tuning ✔ AI-powered apps: Chatbots, Document Analyzers, Predictive Analytics 4. QA & Testing Frameworks ✔ Automation Testing: Appium, Cypress, WebDriver IO ✔ API Testing: Postman, Swagger ✔ Project Tracking: Jira, Azure DevOps 🏆 𝗪𝗵𝗮𝘁 𝗦𝗲𝘁𝘀 𝗠𝗲 𝗔𝗽𝗮𝗿𝘁? Deep Technical Breadth – 50+ Azure/AWS services mastered, 12+ years in full-stack development. Client-Centric Approach – Transparent communication, agile collaboration, and long-term partnerships. Future-Ready Solutions – AI-driven, scalable, and secure architectures tailored to your needs. 🔹𝗟𝗲𝘁’𝘀 𝗕𝘂𝗶𝗹𝗱 𝗦𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝗔𝗺𝗮𝘇𝗶𝗻𝗴! 𝗜𝗻𝘃𝗶𝘁𝗲 𝗺𝗲 𝘁𝗼 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁❟ 𝗮𝗻𝗱 𝗜’𝗹𝗹 𝗱𝗲𝗹𝗶𝘃𝗲𝗿 𝗯𝗲𝘆𝗼𝗻𝗱 𝗲𝘅𝗽𝗲𝗰𝘁𝗮𝘁𝗶𝗼𝗻𝘀｡

I’m an AWS Certified DevOps Engineer – Professional, as well as a certified Solutions Architect Associate and Developer Associate. I specialize in designing and implementing secure, scalable, and efficient cloud solutions. By leveraging AWS best practices and DevOps principles, I help organizations build systems that streamline development and operations while aligning with their business goals. I am expert in below Tools/Technologies, ✅ Cloud: AWS ✅ Operating systems: Ubuntu, Windows ✅ Dockerization and orchestration: Docker, Docker Swarm, EKS, ECS ✅ IaC implementation: CloudFormation, AWS SAM ✅ Microservices infrastructure design, development, and implementation: Docker and Kubernetes ✅ Database management: MySQL, MongoDB, DynamoDB, Oracle, MS SQL Server, AWS RDS ✅ Web services: Apache ✅ Hosting panels: cPanel I have been recognized by AWS with these certifications:- ✅ AWS Certified DevOps Engineer – Professional ✅ AWS Certified Solutions Architect Associate ✅ AWS Certified Developer Associate Thank You.

Get $100 AWS Credit + a complimentary, No-Strings-Attached AWS Cloud Assessment. ⭐⭐⭐⭐⭐ "Rarely have I worked with someone as skilled and thorough as Carlos is. Setting up my team on git, configuring our AWS servers to be safe, scalable, and fast, working with my developers to optimize code, being a good person". James Rector, UPWORK 100+ 5-star projects, I'm one of highest-rated and highest-earning AWS freelancer on UPWORK. I have been helping SaaS businesses to build scalable, secure, highly available and high-performing environments on AWS following DevOps/Dev Ops best practices. Here is what I can help you with: ✅ Review of your AWS current architecture performance, security and costs ✅ Architecture of new AWS infrastructure and Data Pipelines ✅ Migrations to AWS, AWS Cost Reduction, Database Optimisations, DevOps Engineer ✅ Managed Services SLA Problems that I solve: ⚡️ Performance At Scale: I build and deploy industry-tested and proven infrastructure code that ensures your application runs and performs fast without compromising security. ⚡️ Cost Optimisation: My infrastructure architecture enables the efficient use of resources and can help you save up to 90% in your AWS costs ⚡️ Security & Compliance: I can help you Scale and innovate quicker while building a solid foundation that will help you maintain a secure, compliant environment. ⚡️ Training & DevOps. I can help you increase your team's technology adoption while automating your DevOps/ Dev Ops processes. Technologies that I adopt and I'm an expert at: ➡️. AWS services such as s EC2, ECS, EKS (Kubernetes), S3, RDS, Step Functions, Lambda, AWS Gateway API, DynamoDB, Beanstalk, Elasticache, SNS, SES, IAM, ControlTower, WAF, Shield, Cloudformation, Cloudfront, CloudWatch, VPC, Route 53, Certificate Manager and others. ➡️. Supporting services such as CDK, Terraform, Rancher, ISTIO, Prometheus, Grafana, Teleport, Papertrail, Graylog, New Relic, Dynatrace, DataDog, Kafka, NEO4J and Spot.io. ➡️. Strong CI/CD DevOps engineering using GitHub/BitBucket Pipelines, CircleCI, ARGOCD. Industries: - FinTech - Media - Ecomm - and more! Here are some of the case studies of the clients I have helped with: 1. MONETRACK - Deploying a client stack in minutes on AWS instead of weeks Industry: Finance Problem: An unreliable process that caused constant frustration and delays. Process: Each deployment would take days to weeks to be set up, requiring between 5-6 people. Results: They now deploy a client stack in minutes instead of weeks using AWS EKS and a customised CI/CD process. In addition, I have: · Improved deployment time from weeks to minutes. · 80% reduction in costs per deployment. · Secure alignment with their client's compliance requirements. 2. Tourism Media - Great flexibility, deploying applications faster and secure on AWS Industry: Media Problem: With no CI/CD integration across all deploys, the job to integrate each stack was inconsistent and pruned to errors. Process: Deployment was not consistent across the board; they were also not resource-friendly Result: They can now push out a consistent deployment process across the company while being quickly adopted by their teams. In addition, I also have: · Improved deployment time by 60% · 70% costs reduction in EC2 instances · Greater scalability and reliability than their Legacy infrastructure. 3. Value-Ad - Scale 10X more on AWS with great stability and without the extra cost. Industry: Finance Problem: An infrastructure that could not scale securely and effectively was harming their client base. Solution: Deploy a new AWS EKS (Kubernetes) environment that is scalable, highly available, secure (PCI-DSS compliant) and cost optimised using AWS Well Architect Framework best practices. Result: They can now handle 10X more requests with excellent stability and without extra cost than their legacy infrastructure. In addition, I have added: · Greater scalability and reliability · Deployments are simplified and done in minutes instead of hours · 32% cheaper than its previous infrastructure Now a bit of myself: I'm a passionate professional with 25 years of experience in enabling business strategies through the practical application of technology architecture principles, practices, and tools. User-centric and solution-oriented, I have managed projects and teams across Australia, New Zealand, the USA, Brazil, the UK, Ukraine, Singapore, Vietnam and India over the past 14 years. A problem-solver in a broad range of technology stacks covering Architecture, Development, Integration, Data, Infrastructure, and Support. Seamless configuration and migration include fast deployment of critical and complex workloads on the cloud with hands-on expertise in AWS Services. Send me a message. I would love to discuss your project.