Hire the Best Ab Initio Developers in Kolkata, IN

Senior Software Engineer | AI/ML & LLM Integration Specialist | Distributed Systems & AWS Expert Overview: I am a Senior Software Engineer with a proven track record of leading high-impact engineering teams at Amazon. With extensive experience in architecting distributed systems and cloud infrastructure, I specialize in building scalable, intelligent solutions that solve complex business problems. Whether you need to modernize your legacy architecture, implement generative AI features, or lead a mission-critical engineering project from the ground up, I bring the expertise of a FAANG-level engineer to your business. Core Expertise: AI & LLM Integration: Building intelligent plugins, custom agents, and knowledge-based automations to streamline workflows and customer onboarding. System Architecture & Migration: Expertise in migrating legacy services to the cloud, optimizing distributed systems, and reducing infrastructure costs while improving reliability. Cloud & Backend Development: Deep experience with AWS ecosystems, Java, and TypeScript/Node.js tech stacks. Team Leadership: Experienced in managing cross-functional teams of 2–4 engineers, collaborating with senior leadership, and driving projects through the full software development lifecycle (SDLC). Recent Experience Highlights: ERP & AI Plugins: Recently designed and launched an ERP system plugin utilizing LLMs and knowledge bases to automate customer onboarding, significantly reducing friction. API & Bot Development: Developed high-scale Transportation APIs and customer-facing WeChat bots to manage end-to-end logistics experiences. Large-Scale Migration: Managed the migration of 40+ legacy services, creating reusable frameworks for authentication, data transfer, and traffic routing. Revenue Impact: Delivered financial automation systems that processed over 99% of total revenue for large-scale global logistics operations. I am highly collaborative, accustomed to managing multiple stakeholders, and obsessed with delivering clean, maintainable, and high-performance code. If you are looking for a senior-level engineer who understands the intersection of robust backend engineering and modern AI capabilities, let’s discuss how I can help your team achieve its goals.

I am a expert TYPO3 developer and specialize in this CMS framework. I have been working with this CMS since 2008. I also work on TYPO3 Flow. I develop custom TYPO3 extensions, do TYPO3 integration and create Fluid templates. I have worked over hundreds of TYPO3 websites across the globe for numerous end clients and TYPO3 agencies. I have a long 17 years of web development experience. Even though I am full-stack developer, I also have MEAN stack work experience. Lately, I had worked on React Native and Ionic Framework projects. Apart from coding knowledge, I posses software development and delivery infrastructure knowledge. I have set up experience of Jenkins, SonarQube, Cruise-Control, integrated units testing and coding standard tools. I also integrated JIRA with GIT repositories as single-window information system. I am a complete technical person and technology is no barrier for me. I had designed and architect solutions for many challenging and complex software. Since, I have very long career history, I had the opportunity to work on various kind of web platforms like Flow, CodeIgniter, CakePHP, Zend, Firebase, Joomla and Magneto. I had also worked with Apache-Solr in many projects and fine-tuned many set up. I have extensive knowledge of online payment gateway integration and worked with PayPal, Paymill, PayTabs, 2checkout, Authorize.net, Sofort, Hidel-pay, CC-Avenues. Along with OpenSource technologies, I had also worked on .NET and JAVA projects to gather knowledge and compare technologies.

🏆 Accelerated 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬 | 100% 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 Rate | 𝐑𝐢𝐬𝐤 𝐅𝐫𝐞𝐞 𝐓𝐫𝐢𝐚𝐥 I help SaaS companies and enterprise teams build scalable, cloud-native applications using C#, .NET Core 8, ABP.io, ASP.NET Zero, and Azure. If you need a reliable architect-level developer who builds clean, high-performance systems or can rescue/upgrade an aging application, you’re in the right place. For over 10 years, I’ve delivered enterprise-grade platforms, multi-tenant SaaS products, mission-critical APIs, and comprehensive front-end ecosystems (Angular, React, Vue). I also specialize in modernizing legacy systems, including Classic ASP, .NET Framework, outdated monoliths, and poorly structured applications, into modern, modular, or microservice-ready .NET Core architectures using ABP.io and ASP.NET Zero. 𝑾𝒉𝒂𝒕 𝑰 𝑫𝒆𝒍𝒊𝒗𝒆𝒓: • SaaS platforms & enterprise back-ends (.NET Core 6/7/8, ABP.io, ASP.NET Zero) • Legacy modernization (Classic ASP → .NET Core, WebForms → Angular/React) • Cloud-ready deployments using Azure (App Services, Functions, SQL, DevOps CI/CD) • High-performance APIs & microservices • Front-end applications (Angular, React, Vue, Blazor) • Clean architecture, SOLID, secure authentication/authorization 𝑾𝒉𝒚 𝑪𝒍𝒊𝒆𝒏𝒕𝒔 𝑯𝒊𝒓𝒆 𝑴𝒆: • 22,000+ Upwork hours & 100% Job Success Rate • Clear communication, structured updates, and fast delivery • Deep expertise in complex enterprise workflows and large-scale systems • Clean, maintainable code that scales—no shortcuts, no fragile quick fixes If you’d like a dependable developer who can architect, build, or modernize your Dot NET/C# platform, let’s connect. Send me a message, and I’ll be happy to review your requirements. I even offer a risk-free initial consultation. 𝑻𝒆𝒄𝒉𝒏𝒊𝒄𝒂𝒍 𝑬𝒙𝒑𝒐𝒔𝒖𝒓𝒆: Top Skills (Primary): • .NET Core 8 • C# developer • ABP.io developer • ASP.NET Zero expert • SaaS platform development • Enterprise application development • Legacy modernization Classic ASP → .NET Core • Azure App Services • Azure Functions • Microservices architecture • Clean Architecture .NET • Angular developer (.NET backend) Secondary Skills (Use sparingly): • React developer • Vue.js developer • Blazor • Docker / Kubernetes • CI/CD Azure DevOps • SQL Server / PostgreSQL / MongoDB • REST APIs / GraphQL APIs • Multitenant SaaS • ABP commercial framework • ASP.NET Boilerplate

Over 15+ years of experience has built a reputation for scaling customer expectations. I provide round-the-clock connectivity and services to clients in different verticals like Edtech, Guard Patrol, Field Service, ERP, CRM, POS, Healthcare, Transportation, CMS, E-Commerce, Business Automation & different IT services. Specialized on ASP.Net and Microsoft Power Platform ★★ Tech Stack Expertise ★★ ✅ Framework: ASPNET Boilerplate, ASPNET ZERO, ABP Framework, ABP.IO, Strapi ✅ Integration with Microsoft Power Platform like Power BI, Power Automate, 365, etc. ✅ Seamless Integration with Office/Microsoft 365 Apps (SharePoint, OneDrive, Teams, Outlook, Planner, Excel, Bookings) using standard connectors and Microsoft Graph API. ✅ Backend: .NET & .NET Core, C#, VB.NET, Web API, NodeJS, PHP, Laravel, Python, Django ✅ Frontend: .NET MAUI, ASP.NET MVC, ASP.NET Web Forms, Angular, React, TypeScript, Laravel ✅ Cross-Platform Framework: .NET MAUI, Xamarin Flutter, React Native ✅ Database: SQL Server, MySQL, Oracle, MongoDB, PostgreSQL, Firebase ✅ Cloud Service: MS Azure, AWS, Google Cloud ✅ DevOps: CI/CD Pipelines, Kubernetes, Docker, Github Repos, Test Plan, Build Strategy, Artifacts with Python & Nuget Package feeds, etc. ✅ Source Control: Github, GitLab, Bitbucket, TFS ✅Experience working with 90+ Prebuilt (both Standard and Premium) and Custom Connectors. ★★ Service Areas ★★ ✔ Web Development: Custom Web application, Website Design & Development, Web Portal Development, API Development & Integration, Ecommerce Development, Maintenance & Support, UI/UX Design ✔ Mobile App Development: App UI/UX Design, Custom Native & Cross Platform App Development, App Maintenance, App Migration & Update ✔ SaaS & MVP Developement ✔ Dedicated hiring with up to 70% less price Additional: ✅ Custom AI Models ✅ Integrating Power Apps seamlessly with Microsoft Dynamics 365. ✅ Migrating data to Microsoft Dataverse or Business Central. ★★ Key Achievements ★★ ✅ 100% Job Success Rate on Upwork. ✅ 300+ 5 Star(*) reviews on Upwork. ✅ Certified 'Top Rated Plus’ on Upwork ✅ Team delivered 1, 10, 000+ hours of work on Upwork ✅ Accredited 'MOST TRUSTED IT ENTERPRISES IN INDIA 2022' ✅ 30+ SaaS Application, 200+ Enterprise Application, 150+ Mobile App Delivered ★★ We are 'Exceptional' & make sure ' Guaranteed Delivery ' ! ★★ ✅ Work with India’s top 1% of developers ✅ Save development costs up to 70%. ✅ Direct access, communication, and work with dedicated developers. ✅ Free Quality Assurance & Testing to make sure accurate delivery ✅ Free UI/UX design support ✅ We follow 'Business Continuity Plan' to guarantee seamless delivery ✅ Unlimited after-delivery support ✅ We take 100% ownership of delivery

🌟 Top rated Full-Stack Developer | Mobile App & Website Development Expert | UI/UX Specialist | Python & Chatbot Developer | SAP | SAP BTP | Chatbot |🌟 Unlimited revision of design to ensure you get exactly what you're looking for Ex Infosys, IBM, SAP Over 55000+ hours worked so far With an experience of more than 15 years in IT, i bring in a range of experience for your IT needs. He has a wide range of experience in SAP, Java and Mobility and demonstrates solutioning skills to find the right solution for your enterprise problems. I have a prior experience in working with large MNCs like IBM and SAP and working in various geographies like Germany, Switzerland, Japan and India. Currently I am the Director of ROITech and also play the key role of as software evangelist and a solution architect. I provide end-to-end development tailored to your needs. My aim is to make your ideas a reality with scalable, secure, and user-friendly solutions. I'm specialized in several Website Development & Mobile Apps Development skills. Some of my expertise follows, ⭐️ Web Application Development ✅ Website Development ✅ E-Commerce website development ✅ MEAN Stack Development ✅ Angular Application Development ✅ Node JS Development ✅ MERN Stack Development ✅ React JS Development ✅ Laravel Application Development ⭐️ Mobile Application Development ✅ Hybrid Application Development ✅ React Native Development ✅ Flutter ✅ Native Application Development ✅ Swift ✅ Objective C ✅ Java ✅ Kotlin ⭐️ SAP ✅ BTP ✅ Fiori ✅ ABAP

I’m a passionate Full-Stack and Mobile App Developer with 15+ years of experience building high-performance web, mobile, and AI-driven applications that help businesses launch, scale, and innovate. Whether you need a sleek mobile app, a robust enterprise platform, or cutting-edge AI solutions, I bring the expertise to bring your vision to life. 🤝What I Do Best🤝 📌Mobile App Development: iOS (Swift, Objective-C), Android (Kotlin, Java), Firebase 📌Full-Stack Development: .NET Core, Node.js, React, Angular, Vue.js, Python 📌AI & ML: OpenAI, TensorFlow, NLP, AI-Powered Automation 📌Cloud & DevOps: AWS, Azure, Kubernetes, Docker, CI/CD Pipelines 📌Databases & Integrations: SQL Server, MongoDB, PostgreSQL, Stripe, HubSpot 📌3rd-Party API Integrations: Payments, Messaging, Social APIs 🏭Industries I’ve Worked With:🏭 ➡️FinTech & Banking – Secure transactions, fraud detection, and payment gateways ➡️Healthcare & Telemedicine – HIPAA-compliant platforms for secure patient data ➡️E-commerce & Marketplaces – Scalable shopping experiences with AI-powered recommendations ➡️Fitness & Wellness – AI-driven tracking, analytics, and personalized programs ➡️Social Networking – Real-time, high-engagement platforms with seamless user interactions 🎯Why Work With Me?🎯 ✔️ Scalable & High-Performance Development – From MVPs to enterprise solutions ✔️ AI-Powered Innovation – Integrating AI/ML to supercharge your business ✔️ Agile & Fast Execution – Rapid prototyping, iterative development, and smooth workflows ✔️ End-to-End Support – From planning to post-launch maintenance ✔️ Transparent & Communicative – Clear updates, collaborative approach, and on-time delivery 🚀 Let’s build something amazing together! If you're looking for a top-tier developer who can bring your ideas to life with scalability, performance, and innovation, let’s connect. 🎯