Hire the Best Amazon Backend Developers

I'm a Senior Full-Stack Developer with 7+ years of experience building scalable, production-ready SaaS platforms, marketplaces, CRM systems, dashboards, and custom web applications using React, Next.js, Node.js, TypeScript, React Native, PostgreSQL, MongoDB, and AWS. I build multi-sided platforms—the kind with admin dashboards, customer portals, partner portals, role-based permissions, payment systems, API integrations, and complex business logic that actually governs what each user sees and does. This is the work I keep getting hired for: lead-distribution platforms, internal business systems, marketplaces, AI-powered applications, and SaaS products that need to move from specification to production quickly without compromising security, scalability, or maintainability. I take ownership from architecture and database design through frontend development, backend development, REST API development, deployment, and long-term product evolution. Whether you're launching an MVP, modernizing an existing application, or scaling a production platform, my focus is always the same: clean, maintainable code, scalable architecture, performance optimization, secure development, and reliable delivery. Core Stack: ✅Frontend: React, Next.js, TypeScript, Tailwind CSS, Material UI, Ant Design, React Native, Expo, HTML, CSS ✅Backend: Node.js, NestJS, Express.js, PHP, CodeIgniter ✅Databases: PostgreSQL, MySQL, MariaDB, MongoDB, DynamoDB, SQLite ✅ Cloud & DevOps: Docker, AWS, CI/CD, PM2, DigitalOcean ------------------------------------------------------------------- WHAT I BUILD 🚀 SaaS Platforms, CRM Systems & Marketplaces I design and develop custom SaaS platforms, CRM systems, marketplaces, and internal business applications with complex workflows, business rules, dashboards, reporting, authentication, and role-based access control. From MVP to enterprise-scale products, I build software that's designed to evolve with your business. 🎯 Role-Based Applications & Business Logic Admin dashboards, customer portals, partner portals, employee workspaces, approval workflows, lead distribution, bidding engines, listing assignment, pipeline management, and permission systems where visibility and business rules are enforced securely on the backend—not simply hidden in the UI. 🔌 REST APIs & Third-Party Integrations I build and integrate REST APIs, payment gateways, external services, webhooks, authentication providers, SMS/email platforms, cloud services, and automation workflows. Whether your platform needs Stripe, OpenAI, internal APIs, or custom integrations, I design reliable and maintainable integration layers. 💳 Payments & Financial Workflows Stored payment methods, prepaid balances, subscriptions, transaction processing, auto-reload, referral payouts, wallet systems, refunds, credits, webhook handling, reconciliation, and the edge cases that production payment systems inevitably encounter. 🤖 AI-Powered Product Features Production-ready integrations with OpenAI, Gemini, and modern AI services for document processing, candidate scoring, intelligent search, content generation, recommendations, automation, and workflow optimization—with validation, fallback strategies, and real business use cases. ⚡ MVP Development & Product Scaling I help founders move quickly from product specification, wireframes, or Figma designs to a working MVP, then continue improving the platform through new features, optimization, and long-term product development. Recent projects include: ● Lead management and marketplace platforms ● Merchant rewards systems ● React Native mobile applications ● API documentation platforms ● OTT streaming infrastructure ● Internal business dashboards ● AI-powered product features ---------------------------------------------------------------------------- HOW I WORK Clients hire me because I don't just complete tickets—I help build successful products. I communicate like an owner, not a ticket-taker. That means: ✔️ Taking ownership from planning through deployment ✔️ Proactively identifying technical risks before they become expensive problems ✔️ Delivering clean, maintainable, production-ready code ✔️ Recommending practical solutions instead of waiting for instructions ✔️ Providing clear milestone updates and transparent communication ✔️ Building software that's secure, scalable, and easy to maintain Whether I'm working independently or alongside product managers, designers, QA engineers, and development teams in an Agile environment, my priority is always the same: deliver high-quality software that solves real business problems and creates long-term value. If you're looking for a Senior Full-Stack Developer who can build, improve, or scale your SaaS platform, marketplace, CRM, AI-powered application, or custom web application and take ownership from idea to production I'd be happy to discuss your project, recommend the right technology stack, and provide realistic estimates before you commit.

Are you looking to build a high-performance SaaS platform, automate a complex supply chain, or integrate secure, production-ready AI into your business workflow? Many developers can write code, but very few understand how to seamlessly blend cutting-edge AI/ML systems with scalable, enterprise-grade architecture while ensuring strict data security (HIPAA, PCI-DSS). I am a Full-Stack Developer and AI/ML Engineer with extensive experience architecting end-to-end solutions for SaaS, Supply Chain, Healthcare (HIS/HMS), and custom ERP systems. Whether you need to build an MVP from scratch or scale an existing enterprise platform, I deliver clean, maintainable code and robust infrastructure. 🚀 Core Expertise & How I Can Help You: AI/ML & GenAI Integration: Building intelligent RAG systems, custom chatbots, and LLM-powered workflows using OpenAI, Anthropic, LangChain, and Vector Databases (Pinecone, Qdrant). Robust Backend & Architecture: Designing secure, high-throughput microservices and APIs using Node.js (NestJS), Python (FastAPI/Django), and PHP, backed by PostgreSQL, MongoDB, or Redis. Modern, Responsive Frontends: Crafting seamless web and mobile interfaces using React, Next.js, Angular, Vue.js, and React Native. Cloud, DevOps & Compliance: Deploying production-ready applications on AWS/GCP/Docker with CI/CD pipelines, keeping security and regulatory standards (HIPAA, GDPR) at the forefront. 🛠️ Technical Snapshot: Frontend: React, Next.js, Angular, Vue.js, React Native, Tailwind CSS Backend: Node.js (NestJS/Express), Python (FastAPI/Django), PHP, Java AI/ML: LLMs, LangChain, Vector DBs, Prompt Engineering, RAG Systems Cloud & Databases: AWS, GCP, Docker, Kubernetes, PostgreSQL, MySQL, MongoDB, Redis Let’s build something scalable. Click the "Invite to Job" or "Hire" button on the top right, and let’s discuss how we can bring your project to life.

Need a Java backend that survives real traffic, not just passes a demo? I build production-grade APIs and microservices with Spring Boot, then layer AI agents on top that reason over your live data instead of guessing. Most backend developers stop at CRUD endpoints. I go further: solving distributed-systems problems like race conditions, multi-instance coordination, and rate limiting, then extending those systems with AI tool-calling agents that answer real questions about live system state. My recent rate limiter project (Java, Spring Boot, Redis) was verified with concurrent load testing and deployed live on AWS behind a load balancer across multiple instances. Here's what I can build for you: - Production-ready REST APIs and microservices in Java/Spring Boot or Node.js/Express - AI agents and chatbots that operate on your real data via tool-calling, not static prompts - Scalable backend architecture for SaaS products - Distributed-systems fixes: rate limiting, caching, concurrency, atomic operations - Performance tuning for slow APIs, database queries, and N+1 issues - AWS deployment with Docker and Kubernetes, plus production debugging 5-star rating from every completed contract so far, with hands-on experience integrating Elasticsearch into Spring Boot microservices to search 500,000+ records (cutting response times by 50%) and implementing OAuth 2.0 and TLS security. Backed by a Java Programming Masterclass certification and an Accenture engineering job simulation. Available now, with an average response time under 4 hours. Send me a message and let's talk about what you're building.

✅ Expert-Vetted Developer | Digital Solutions Architect | Founder of Apptimist Studio Helping startups and scaling businesses build world-class digital products with speed, strategy, and confidence. **** About Me**** I'm a product-focused software engineer and systems architect with over a decade of experience helping teams bring their digital ideas to life. I lead Apptimist Studio, a product development studio that partners with early-stage and scaling companies to build high-quality, scalable web and mobile applications. Whether you're launching your MVP, rebuilding an outdated platform, or need a fractional CTO to guide your tech decisions—I can help. ****What I Do**** ✅ I work with founders, product teams, and agencies to: - Build MVPs or complete products from scratch - Act as an outsourced CTO or technical co-founder - Translate business goals into clear, executable development plans - Lead and manage remote product teams - Set up scalable, cloud-native infrastructure - Improve code quality, security, and system reliability ****Core Expertise**** ✅ Product Strategy & Ownership - Defining, prioritizing, and delivering product features with a user-first mindset ✅ Custom Web Application Development - Python, Django, PostgreSQL, Docker, ECS ✅ Cloud & Infrastructure Architecture - AWS (Certified Cloud Practitioner), EC2, ECS, S3, CloudFormation, Terraform ✅ DevOps & Automation - CI/CD, Kubernetes, containerized environments, scalable backend workflows ✅ System Design & Data Architecture - Secure, API-first, modular systems for long-term growth ✅ UX/UI Oversight - Working alongside in-house designers and researchers to ensure product-market fit. While I personally focus on strategy, systems, and technical leadership, I work closely with our in-house expert UX/UI designers and developers to deliver seamless, user-centered experiences across web and mobile platforms. If awarded a UX/UI project, I’d bring in one of our senior UX/UI specialists to collaborate with me and ensure we cover all bases — from user research and wire-framing to pixel-perfect UI design and implementation. This means you get a cohesive, end-to-end team without the hassle of managing multiple freelancers. ****Selected Work**** I’ve worked with global corporations, fast-growing startups, and everything in between. ****Highlights include**** ✅ Thrive Circle – Infrastructure and backend for a US wellness app ✅ SPAR - E-commerce platform for modernised in-store, self-checkout grocery shopping ✅ ZIM Connections – Global eSIM tech platform with complex onboarding flows ✅ Muzeo Treats – Full custom e-commerce build for gourmet gifting ✅ Nescafé É (Nestlé) – Internal innovation portal for global teams ✅ Tamarack Idaho – Resort booking tools and mobile feature development ✅ European Bank (Confidential) – Data pipelines and secure cloud systems ✅ Industry 4.0 Digital Tools – Manufacturing optimization for Italy & Slovenia ✅ IoT Security Projects – Secure prototyping with MircoSec in Singapore ****About Me**** I hold a Master’s degree in Engineering of Computing Systems from Politecnico di Milano and am a Certified AWS Cloud Practitioner. I'm also the author of On Understanding the Causes of Software Defectiveness, a book focused on improving software quality and reliability. Over the years, I've worked with Forbes 200 companies such as Accenture, Pirelli, and Spar, as well as numerous startups across Europe, the U.S., and Asia. ****Why Clients Choose Me**** ✅ I combine deep technical expertise with clear product thinking ✅ I communicate openly, proactively, and with transparency ✅ I lead projects with structure, accountability, and a focus on business outcomes ✅ I offer long-term partnerships—not just code drops If you're looking for a reliable technical partner who understands both engineering and product strategy, let's talk. I’d be happy to learn more about your project and see how I can help.

Are you looking for a reliable problem solver who can turn your ideas into powerful, scalable applications, you're in the right place. I help startups, growing businesses, and established companies build & customize open source software that solves real problems, improves workflows business processes, and delivers measurable results. With over 15 years of experience in full stack development, I specialize in building web and mobile solutions that are fast, secure, and designed to scale, whether it's a ERP, SaaS platform, Franchise management system, healthcare system, workflow automation using AI or e-commerce solution. 🧱 Tools & Technologies I Use to Deliver Results ✔Backend: ASP.NET Core, ASP.net MVC,ASP.net web forms (Dev Express/Telerik), .NET Framework, Node.js, C#, VB.NET ✔Database: SQL Server, MySQL, Oracle, Writing Complex SQL Queries and optimized stored procedures. ✔Reporting: Xtra Reports, Crystal reports, iTextSharp ✔Frontend: React, Bootstrap, Tailwind, Swift, Vue.js, TypeScript, Jquery, JavaScript Cloud: Azure, AWS ✔Integrations: OpenAI, ChatGPT, n8n, make, Google drive, Outlook IMAP, Structure SDK, SignalR, social login (Google, Facebook) ✔Healthcare: HL7, FHIR, HIPAA compliance ✔Website development: Shopify, Nop Commerce, WordPress, E-Commerce website, WooCommerce, Bubble.io. 💡Why Clients Choose to Work With Me ✔I don’t just write code, I help solve business problems ✔I bring 15+ years of experience across industries, with a focus on results ✔I understand deadlines, budgets, and the need for clear communication ✔I build for the long term, my solutions are scalable, secure, and easy to maintain ✔I act as a true partner, not just a developer I work with business owners, product managers, and tech leads to create software that fits their exact needs, not generic templates. Whether you're launching a new app, modernizing legacy systems, or adding new features to an existing product, I bring a hands-on approach to understanding your goals and translating them into clean, maintainable code. Every project I take on is led by me, from planning to deployment. For larger or more complex projects, I bring in a small, trusted team of developers and designers I've worked with for years. This allows us to scale delivery without compromising quality, speed, or communication. You’ll always have a single point of contact and technical lead, you’re not just handed off to a team. Everything I build is focused on usability, performance, and business impact. If you're ready to build a solution that works for your users and grows with your business, let’s connect. I'm happy to review your project and suggest the best next steps.

If your app is broken, behind schedule, or stuck with bugs you can't diagnose, I can help. I specialize in taking AI-built and half-finished apps the last mile: fixing, hardening, auditing, and shipping them to production. I've been building production software for 35+ years, including a decade as CTO and then Chief Product Officer at a fintech platform, where transaction correctness, data isolation, and security were non-negotiable. I still sit in that seat today as a fractional CTO for founders, guiding teams from idea through MVP launch. I've led architecture, run engineering teams, and shipped systems that had to hold up under real operational stakes. I build with AI tooling every day, including Claude and the Anthropic API, and I run my own business operations on an automated AI-agent pipeline I built. That's why my delivery timelines run ahead of standard estimates, and why I know exactly where AI-generated codebases skip guardrails and where they hold up. My recent production work centers on React, Next.js, TypeScript, Supabase (Postgres, Auth, RLS), Node.js, and Stripe. Recent engagements include pre-launch SaaS architecture audits, Supabase RLS and API security reviews, rescuing AI-generated MVPs (Lovable, v0, and similar) into production, and LLM feature integrations. Common engagements: - Pre-launch architecture and security audits, with a written findings and remediation report (Supabase RLS is a specialty) - Stabilizing and finishing AI-built or half-built MVPs - API integrations that fail, timeout, or return incorrect data - Auth, webhooks, and data sync issues - React rendering, state, and performance problems - Node.js / Express backend errors and crashes - LLM features: chat, scoring, extraction, and agent workflows I also work with Web3 systems when a project calls for it, including Ethereum and Solana smart contracts, token integrations, and wallet-based workflows. I'm available for short-term fixes, audits, and ongoing support. If you're not sure what you need yet, start with an audit: you'll get a written findings and remediation report you can act on with or without me.