Built and deployed 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐒𝐚𝐚𝐒 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬, 𝐀𝐈-𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐞𝐝 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬, 𝐚𝐧𝐝 𝐡𝐢𝐠𝐡-𝐩𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐰𝐞𝐛 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 for real-world business environments, helping teams launch faster, automate workflows, and scale without breaking in production. With 7+ years of experience, I specialize in 𝐍𝐨𝐝𝐞.𝐣𝐬, 𝐍𝐞𝐱𝐭.𝐣𝐬, 𝐌𝐄𝐑𝐍 𝐬𝐭𝐚𝐜𝐤, 𝐏𝐲𝐭𝐡𝐨𝐧, 𝐚𝐧𝐝 𝐒𝐭𝐫𝐢𝐩𝐞 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬, delivering systems that are stable, secure, and built for scale. I help startups and growing businesses go from 𝐢𝐝𝐞𝐚 → 𝐌𝐕𝐏 → 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧-𝐫𝐞𝐚𝐝𝐲 𝐩𝐫𝐨𝐝𝐮𝐜𝐭, without the usual delays, technical debt, or broken deployments 💡 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐇𝐞𝐥𝐩 𝐘𝐨𝐮 𝐖𝐢𝐭𝐡 ➝ Build SaaS platforms (from MVP to scalable systems) ➝ Develop AI-powered web applications (OpenAI, LLM integrations) ➝ Create backend systems & APIs that scale under load ➝ Implement Stripe / PayPal payment systems (subscriptions, billing, webhooks) ➝ Develop real-time dashboards & automation systems ➝ Fix, optimize, or scale existing applications 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 ➝ Backend: Ruby on Rails, Node.js, Python, NestJS, Elixir/Phoenix ➝ Frontend: React, React Native Next.js, Tailwind CSS, Angular ➝ APIs: REST & GraphQL, third-party integrations ➝ Auth & Security: Devise, JWT, Role-Based Access Control ➝ Payments: Stripe & PayPal (subscriptions, invoicing, webhooks) ➝ Databases: PostgreSQL, MongoDB, Supabase ➝ Cloud & DevOps: AWS, Docker, CI/CD pipelines ➝ Real-Time Systems: Dashboards, background jobs, automation If you're building a SaaS product, AI system, or scalable web application and want to move faster using modern tech like MERN, Node.js, Python, Supabase, and AI integrations, send me a message. Keywords: Full-Stack Developer, MERN Stack Developer, Node.js Developer, Next.js Developer, React Developer, SaaS Developer, AI Integration Developer, OpenAI API, LLM Integration, LangChain, Stripe Integration, Payment Gateway, REST API, GraphQL, AWS, Docker, CI/CD, MongoDB, PostgreSQL, Backend Developer, Web Application Development

As a versatile Full-Stack Developer, I specialize in crafting end-to-end solutions that seamlessly integrate powerful backend functionality with dynamic and engaging frontends. On the backend, I excel in utilizing PHP frameworks such as Laravel, CodeIgniter, Yii, and custom PHP, along with the flexibility of Node.js to create robust, scalable, and high-performance server-side applications. My expertise extends to API development, database optimization, secure authentication systems, and seamless third-party API integration. On the frontend, I am adept at creating captivating user interfaces using Angular (any version), React.js, and Vue.js. With a keen eye for design and usability, I bring a wealth of experience in developing responsive and visually appealing frontend solutions. Whether it's building single-page applications, integrating complex frontend components, or ensuring cross-browser compatibility, I am committed to delivering a cohesive user experience that aligns with your project goals. My passion for coding excellence, coupled with a commitment to staying abreast of the latest industry trends, enables me to deliver innovative and high-quality solutions. Let's collaborate to bring your vision to life, creating a seamless fusion of robust backend functionality and elegant frontend design.

I’m a senior full-stack engineer with 15+ years of experience building production web applications, APIs, internal business systems, and SaaS platforms. My strongest areas are .NET/C#, ASP.NET Core, Angular, React, TypeScript, SQL databases, API integrations, and AI-assisted workflows. I usually work on systems where correctness, maintainability, and business logic matter: fintech, compliance, CRM/workflow platforms, document-heavy applications, legacy modernization, and internal operational tools. Recently, my focus has been on AI-enabled SaaS and workflow automation: document ingestion, RAG-style search, structured AI outputs, audit trails, evidence handling, policy/document generation, and integrations with third-party systems. I’m also building AlturaQuantera, an AI/compliance SaaS product, so I understand both the engineering and product side of early-stage SaaS development. What I can help with: • Full-stack SaaS development with .NET, Angular, React, TypeScript, PostgreSQL, SQL Server • Backend architecture, REST APIs, background jobs, integrations, and complex business logic • AI integrations using OpenAI / LLM APIs, document workflows, RAG, structured outputs, and automation • Compliance, fintech, CRM, document-processing, and internal workflow systems • Legacy application modernization, refactoring, performance tuning, and system stabilization • Database design, reporting, import/export workflows, and integration layers between SaaS tools • Production readiness: authentication, RBAC, audit logs, logging, testing, deployment, and maintainability • Multi-tenant SaaS architecture, user roles, permissions, subscription logic, and admin dashboards • API integrations with third-party platforms, webhooks, payment systems, CRMs, data providers, and automation tools • Data-heavy applications with complex forms, tables, dashboards, filters, workflows, and reporting • AI-assisted document search, summarization, classification, extraction, and review workflows • Clean Architecture, layered architecture, domain modeling, and maintainable service boundaries I’ve worked on systems ranging from financial platforms and CRM-like internal tools to industrial/network monitoring software and AI-assisted compliance products. I’m comfortable joining existing codebases, understanding messy business logic, and improving systems without unnecessary rewrites. Typical problems I solve: • “Our prototype works, but it is not production-ready.” • “We need a senior engineer to clean up architecture and stabilize delivery.” • “We need AI features, but not a fragile GPT wrapper.” • “Our business workflow is trapped in spreadsheets and manual processes.” • “Our legacy .NET / Angular / SQL system needs modernization.” • “We need API integrations, data imports, dashboards, permissions, and reliable backend logic.” • “We have complex documents and need AI-assisted extraction, search, or review.” • “We need a maintainable SaaS architecture before the product becomes too messy.” • “We need a technical partner who can think through product logic, not just write code.” I have experience across backend and frontend development, including ASP.NET Core APIs, Web API, Entity Framework, Dapper, SQL optimization, Angular applications, React dashboards, TypeScript frontends, background workers, file processing, scheduled jobs, authentication, authorization, and deployment workflows. I also work with AI and automation in a practical way: LLM APIs, OpenAI API, embeddings, pgvector-style search, RAG pipelines, structured JSON outputs, prompt/version management, document workflows, and human-in-the-loop review. I focus on making AI features traceable, testable, and useful for real business users — not just impressive demos. Additional relevant domains: Financial dashboards, forex/FX systems, market-data workflows, economic data APIs, reporting dashboards, document intelligence, compliance automation, CRM/workflow platforms, data imports, ETL-style pipelines, scheduled jobs, and AI-generated structured insights. Core stack: .NET / C# / ASP.NET Core / Web API / Entity Framework / Dapper / SQL Server / PostgreSQL / MySQL / Angular / React / Next.js / TypeScript / JavaScript / NestJS / Node.js / REST APIs / Docker / OpenAI API / LLM integrations / RAG / pgvector / AI automation / SaaS architecture / API integration / CRM systems / fintech applications / compliance workflows / document processing / legacy modernization / workflow automation / dashboards / reporting / authentication / RBAC / audit logs / cloud deployment / Azure / AWS / CI/CD, financial dashboards / forex systems / market data / economic data APIs / data pipelines / ETL / scheduled jobs / AI-generated insights

𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝟏𝟎+ 𝐘𝐞𝐚𝐫𝐬 𝐨𝐟 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 | 𝐒𝐚𝐚𝐒, 𝐌𝐕𝐏𝐬, 𝐀𝐏𝐈𝐬 & 𝐂𝐮𝐬𝐭𝐨𝐦 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 I'm a Full-Stack Developer with 10+ years of experience building scalable web applications, SaaS platforms, MVPs, custom CRMs, and enterprise solutions for startups and established businesses. I work directly with founders, CTOs, and product teams—no agency layers, no project managers, and no unnecessary communication overhead. When you hire me, you're working directly with the developer designing, building, and maintaining your product. 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 ▶️ Backend Node.js (Express) PHP Laravel CodeIgniter CakePHP Yii2 Symfony ▶️ Frontend React Angular JavaScript HTML5 CSS3 ▶️ Database PostgreSQL MySQL MongoDB ▶️ Cloud & Integrations REST APIs Third-party API Integrations Payment Gateways Authentication Webhooks AWS 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 𝐈'𝐯𝐞 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐞𝐝 ✔ Multi-Channel eCommerce SaaS Platform Inventory management Product synchronization Order management Marketplace integrations Shipping automation Analytics dashboard ✔ Transportation CRM A complete CRM for vehicle transportation companies featuring dispatch management, customers, drivers, billing, documents, expenses, payroll, and reporting. ✔ Repair Business ERP Custom ERP for service businesses with inventory, quotations, invoices, employee management, workflow automation, and customer tracking. ✔ Secure Membership Portal Patreon API-integrated membership platform with custom video streaming, subscriptions, access control, and premium content management. ✔ Shipping Comparison Platform Integrated FedEx, USPS, DHL, and Canada Post APIs to provide real-time shipping rates, label generation, and shipment tracking. ✔ HIPAA-compliant healthcare application with AccuroEMR integration. 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐇𝐞𝐥𝐩 𝐘𝐨𝐮 𝐁𝐮𝐢𝐥𝐝 SaaS Products Multi-tenant SaaS applications Subscription platforms Admin dashboards Customer portals Business automation MVP Development REST APIs for mobile app. Custom CRM & ERP Launch quickly with a scalable architecture designed for future growth. 𝐋𝐞𝐠𝐚𝐜𝐲 𝐂𝐨𝐝𝐞 𝐌𝐢𝐠𝐫𝐚𝐭𝐢𝐨𝐧 I help businesses migrate older PHP applications (CodeIgniter, CakePHP, Yii2, Symfony) to Laravel or Node.js while preserving existing functionality and minimizing downtime. 𝐂𝐌𝐒 & 𝐞𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞 WordPress WooCommerce PrestaShop OpenCart Custom plugin development Performance optimization 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲 10+ years of professional development experience Clean, maintainable, and well-documented code Strong communication throughout the project Reliable estimates and transparent timelines Regular progress updates Long-term maintenance and support available I believe successful software comes from understanding your business goals first and writing code second. Before proposing a solution, I take time to understand your requirements, identify potential risks, and recommend the most practical approach. 𝗔𝘃𝗮𝗶𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆 40+ hours/week Full-time freelance Available for audio and video meetings Comfortable working with startups, agencies, and established businesses If you're planning a new SaaS product, building an MVP, modernizing a legacy application, or need an experienced full-stack developer to strengthen your team, I'd be happy to discuss your project. Send me a message with your project requirements and timeline, and I'll provide honest feedback on the best technical approach before we discuss pricing.

🌟 Full Stack Developer | Building Scalable, High-Performing Web & Mobile Applications Hi, I’m Rajarshi, a passionate Full Stack Web & Mobile App Developer with 14+ years of experience delivering exceptional, high-performing software solutions to clients worldwide. I specialize in crafting seamless, scalable, and responsive applications for web, iOS, and Android using modern technologies and industry best practices. Whether you need a robust web platform, a cutting-edge mobile app, or ongoing development support, I can bring your vision to life from concept to deployment. 👨‍💻 My Technical Expertise Includes: Back-End Development -------------------------- Laravel, Yii, CodeIgniter, CakePHP PHP (Core PHP, Advanced PHP) Node.js, Express.js Front-End Development Angular, Vue.js, React.js JavaScript, jQuery, AJAX Bootstrap, TailwindCSS Mobile App Development Native Android (Java, Kotlin) Native iOS (Swift, Objective-C) Cross-Platform (Flutter, React Native, Ionic) Progressive Web Apps (PWA) Mobile API Integration & Push Notifications App Store & Play Store Deployment Database Management MySQL, Oracle 11g, PostgreSQL NoSQL: MongoDB, Firebase Cloud & DevOps AWS (EC2, S3, RDS, Lambda) GIT (Version Control) Other Skills ---------------- RESTful APIs & GraphQL E-commerce Solutions & Payment Gateways CMS Development (WordPress, Magento) Cross-Browser & Cross-Device Compatibility 💼 What I Can Deliver: ----------------------------- ✅ Scalable Web Applications using Laravel, Yii, and Angular ✅ High-Performance Mobile Apps — Native & Cross-Platform with Flutter or React Native ✅ Complex E-commerce Platforms with Magento & Shopify ✅ Real-time Data Applications with WebSocket & Firebase ✅ Optimized Database Solutions with MySQL & PostgreSQL ✅ Cloud Deployment & Server Management on AWS ✅ Secure Payment Gateway Integration for Web & Mobile 🚀 Why Work With Me? --------------------------- Proven Expertise – 14 years of hands-on development in diverse industries. Full-Stack & Cross-Platform Skills – One partner for your web & mobile needs. Attention to Detail – Clean, maintainable, and scalable code every time. Reliable Partnership – Clear communication, on-time delivery, and client-focused solutions. 🛠 Recent Projects: ------------------------ 1️⃣ E-commerce Store – High-performing Magento platform with advanced payment gateway integrations and Angular-powered UI. 2️⃣ Custom CMS – Laravel-based CMS with role-based access and an intuitive admin panel. 3️⃣ Mobile Banking App – Secure Flutter-based app with biometric authentication and real-time transaction updates. 4️⃣ Real-Time Dashboard – Vue.js + MySQL analytics dashboard deployed on AWS for instant business insights. 📩 Let’s Work Together! ----------------------------- If you're looking for a reliable, skilled, and experienced Full Stack Web & Mobile Developer, message me today. I’d love to discuss your project and help bring it to life! Warm regards Rajarshi Banerjee

Angular Frontend Developer 🚀 | Crafting Seamless Web Experiences 🌐 Hi there! 👋 Mykhailo is here! I'm a passionate Angular Frontend Developer who loves building interactive, responsive, and user-friendly web applications. With 5 years of experience, I specialize in turning ideas into beautiful, functional, and efficient code. 💻✨ What I Offer: 🛠 Custom Angular Development: Scalable and maintainable solutions. 🎨 Responsive Designs: Ensuring pixel-perfect performance across devices. 🚀 Performance Optimization: Lightning-fast apps with a seamless user experience. 🔗 API Integrations: Smooth communication between front-end and back-end. 🐛 Bug Fixes & Enhancements: Tackling issues to keep your app running smoothly. Why Work With Me? ✅ Detail-Oriented: I focus on quality and clean code. ✅ Communicative: Regular updates to keep you in the loop. ✅ Deadline-Driven: Your project will be delivered on time, every time! Let’s team up to create something amazing! 🌟 Drop me a message, and let’s make your project shine. 🚀

I am a Senior Software Engineer with over 8 years of experience building scalable, high-performance web applications. My career has been defined by a deep mastery of the JavaScript ecosystem and a proven track record of delivering complex solutions for international clients. Key Expertise: - Frontend: Expert-level proficiency in React, Angular (Redux/RxJS), and Svelte. I have a keen eye for UI/UX, ensuring that every interface is both visually polished and highly functional. - Backend: Extensive experience with Node.js, Django, and SQL Server, focusing on robust architecture and efficient data management. - DevOps & Tools: Skilled in Docker, Git, and modern CI/CD workflows. Professional Highlights: - FinTech Experience: Started my career developing financial systems for clients across Latin America (Bolivia, Guatemala, Ecuador, and Honduras), gaining a strong foundation in security and reliability. - Global Collaboration: Successfully collaborated with distributed teams in the USA, Denmark, and India, adapting to diverse work cultures and high-standard design requirements. - Performance & Quality: I specialize in optimizing web performance and refactoring legacy code using SOLID principles and clean code best practices. I am a detail-oriented developer who believes that clean code and a great user experience go hand in hand. Whether you need a sophisticated frontend or a containerized full-stack application, I am ready to bring your vision to life.

Hi! My name is Andrii, I am a skilled Full-Stack Developer with 8 years of experience, ready to transform your digital concepts into reality. With a holistic approach to web development, I'm passionate about creating seamless, user-friendly experiences that make a lasting impact. My toolkit encompasses a wide array of skills: 📌JavaScript/TypeScript 📌Node.js 📌Nest.js 📌React.js 📌 Python 📌Angular I have experience with several popular frameworks, which allows me to choose the best tool for creating a high-quality user interface according to your needs. Moreover, I am good at working in a team and appreciate the exchange of knowledge, but I am also able to independently solve problems and look for new solutions to improve the quality of work. 💪 More about my skills that will help us achieve the best result: ✅ React.js, Angular, Nest.js, Express, TypeORM, Redux (toolkit/hook forms), JSX, MUI, Bootstrap, AntDesign; ✅ SQL; ✅ WebSokets; ✅ NoSQL - MongoDB, Firebase; ✅ HTML, CSS, LESS, Sass; ✅ SQLite, MySQL, PostgreSQL; ✅ AWS, Azure; ✅ Git, GitHub, GitLab ✅ Agile, Scrum, Kanban, Waterfall, Pair Programming, Feature Driven; Teamwork and Communication 🤝 Collaborative Spirit: Believing in the power of effective teamwork. Clear Communication: Open lines of communication are essential for project success. Adaptability 💼 Staying Ahead: In the dynamic world of web development, staying current with the latest trends and technologies. Problem-Solving: Tackling challenges head-on to keep projects on course. I'm dedicated to turning your web development dreams into reality, all while maintaining a friendly and results-driven approach. Let's embark on this exciting web development journey together! If this sounds like a fit for you, I’d love to chat – invite me to interview and grab some time.

I help businesses build and ship web apps, and I wire AI into them so they actually save time instead of just looking good in a demo. 7+ years building with TypeScript across React, Angular, Node, and Firebase. A big part of my work now is AI integration: connecting GPT, Claude, and Gemini into real workflows, building agents that handle repetitive tasks, and automating the slow parts of your operations so your team can spend time elsewhere. What I can help with: - Full builds, front end to back end, including DevOps and deployment - AI integration and custom agents (OpenAI, Claude, Gemini, AWS Bedrock) - Workflow automation and CRM setup (Zoho, HubSpot, Salesforce, GoHighLevel) - Payment and data integrations (Stripe, Plaid, PayPal, Google Maps) - Maintaining, fixing, and extending apps you already have I keep communication clear and steady throughout. You'll always know where the project stands, and you won't have to chase me for updates. My stack: Front end: React, Next, Angular, NgRx, Redux, Vue Back end: Node, Express, Nest, GraphQL, REST, Lambda, Cloud Functions, Firebase Databases: MySQL, MSSQL, Postgres, MongoDB, Firestore, Supabase Cloud and DevOps: AWS (EC2, S3, Beanstalk, Route 53, Bedrock), GCP, Azure, Docker, CI/CD Testing: Jest, Jasmine Tools: GitHub, GitLab, Bitbucket, Jira, Trello, Asana, ClickUp, Monday Send me a message and tell me a bit about your project. Happy to answer any questions before we start.

I am a full-stack software engineer with 10+ years of experience building production web and hybrid mobile applications across FinTech, SaaS, ERP, edtech, recruitment, marketplaces, and customer engagement platforms. My core stack includes Laravel, PHP, Node.js, TypeScript, Angular, Ionic, MySQL, PostgreSQL, AWS, REST APIs, Kafka, SQS, and message queues. I am strongest in backend-heavy full-stack work where the system needs clean architecture, reliable APIs, optimized databases, third-party integrations, and stable production operations. I can help you with: - Laravel, PHP, Node.js, NestJS, and Express backend development - REST API design, authentication, authorization, webhooks, and integrations - Angular, TypeScript, Ionic, Cordova, and Capacitor apps - MySQL/PostgreSQL schema design, query tuning, backups, and replication - AWS Lambda, SQS, CloudWatch, Linux, Nginx, Cloudflare, and production support - SaaS, FinTech, ERP, marketplace, booking, recruitment, and dashboard systems - Debugging, performance optimization, monitoring, and incident investigation Recent work includes building and operating FinTech/SaaS systems using Laravel, Node.js, Angular, Ionic, AWS, Kafka, queues, and MySQL. I have also worked on ERP systems, warehouse management platforms, edtech mobile apps, recruitment workflows, secure approval systems, and marketplace products. I do not only write features. I can design the API, structure the database, build the frontend, integrate third-party services, deploy the workload, monitor production behavior, and support the system under real usage.