Hire the Best Infusionsoft Developers in Kolkata, IN

✅ Solution Architect | Full-Stack | DevOps | Cloud | AI/ML | LLM Apps | IoT Hi, I’m Niladri — a Solution Architect and Full-Stack Developer with 15+ years of experience helping startups, SaaS companies, and enterprises design, build, automate, and scale secure, production-ready software systems. Clients hire me when they need more than a coder. They need someone who can understand the business goal, design the right architecture, build the product, automate infrastructure, integrate AI where it adds value, and keep the system scalable, maintainable, and cost-efficient. I can work as a senior engineer, architect, DevOps consultant, technical lead, or long-term technology partner. 📊 Skill Ratings DevOps & Cloud Architecture – ▓▓▓▓▓▓▓▓▓▒ 9.5/10 Solution Architecture – ▓▓▓▓▓▓▓▓▓▒ 9.5/10 Backend & API Engineering – ▓▓▓▓▓▓▓▓▓░ 9/10 AI/ML & LLM Integration – ▓▓▓▓▓▓▓▓░░ 8/10 IoT & Embedded Electronics – ▓▓▓▓▓▓▓▓░░ 8/10 Frontend Development – ▓▓▓▓▓▓▓░░░ 7/10 Mobile App Development – ▓▓▓▓▓▓▓░░░ 7/10 🚀 What I Can Help You With ☁️ Cloud, DevOps & Platform Engineering I design and deploy cloud-native infrastructure using AWS, Google Cloud, Azure, DigitalOcean, Heroku, and hybrid/on-premise systems. AWS: EC2, S3, RDS, Lambda, ECS, EKS, Fargate, DynamoDB, CloudFront, Route 53 GCP: Cloud Run, GKE, Firebase, Cloud SQL, BigQuery, Pub/Sub, AI APIs Azure: Functions, App Services, PostgreSQL, DevOps, cloud migration Core DevOps: Docker, Kubernetes, Helm, Terraform, CI/CD, GitHub Actions, GitLab, Jenkins, Bitbucket Pipelines, monitoring, backups, security hardening, high availability, and cost optimization. 🤖 AI/ML, LLM Apps & Automation I help businesses integrate AI into real products and workflows: LLM applications, OpenAI/AWS AI/Google AI integrations, RAG knowledge-base systems, AI chatbots, document processing, vector search with PostgreSQL/pgvector, recommendation engines, predictive analytics, and workflow automation. My focus is not just adding AI features — I design AI systems that are useful, secure, measurable, and practical. 💻 Full-Stack Web Development I build scalable web applications with clean architecture and maintainable code. Backend: Node.js, NestJS, Express, TypeScript, Python, Django, Flask, FastAPI, Java/Spring Boot Frontend: React.js, Next.js, Vue.js, Angular, admin dashboards, SaaS portals Databases: PostgreSQL, MySQL, MongoDB, Redis, DynamoDB, MariaDB, MS SQL I focus on API performance, database design, authentication, authorization, security, testing, and maintainability. 🔗 API Development & SaaS Integrations I build APIs, webhooks, integration layers, and event-driven systems. Experience includes Amazon MWS/SP API/Ads API, QuickBooks Online/Desktop, Xero, FreshBooks, HubSpot, Salesforce, Zoho, Zendesk, Stripe, Twilio, Slack, Asana, REST, GraphQL, Webhooks, Microservices, and Event-driven Architecture. 📱 Mobile App Development React Native, Flutter, and PWAs with real-time chat, push notifications, payments, GPS tracking, offline sync, dashboards, and cloud backend integration. 🌐 IoT & Embedded Systems Embedded Linux, Buildroot, Arduino, ESP, Raspberry Pi, RTOS, FPGA, Petalinux, RFSoC, ZCU111, XRF8, I2C, SPI, UART, TCP, MQTT, sensor integration, and firmware-to-cloud-to-dashboard platforms. 🧠 Technical Leadership I support teams with architecture, cloud review, code/PR review, CI/CD setup, security planning, database/API design, bottleneck resolution, team grooming, scalability planning, and engineering best practices. 🌟 Why Clients Hire Me ✔️ 15+ years of hands-on software, cloud, DevOps, AI, and IoT experience ✔️ Strong mix of architecture, development, automation, and technical leadership ✔️ Ability to work independently or lead a technical team ✔️ Experience with SaaS, fintech, e-commerce, AI, cloud, API integrations, and IoT systems ✔️ Practical mindset: I design systems that can be built, deployed, scaled, and supported ✔️ Strong focus on clean code, security, documentation, automation, and maintainability I don’t just deliver code — I help you build a reliable product, scalable platform, and stronger technical foundation. ⭐ Client Feedback “Nil headed up a full backend solution including RESTful API and AWS cloud setup. He is knowledgeable, understands your needs, and delivers creative, high-quality solutions.” — Douglas Stirling “Nil is an excellent developer — quick to grasp requirements, easy to communicate with, and always delivers well-tested, first-class work.” — Sat Sindhar “Niladri is a highly experienced full-stack programmer with thorough knowledge across technologies. I am extremely satisfied with his services.” — Vishal Agarwal “Niladri is the best at what he does. Very easy to communicate with, delivers flawless work, and provides great support after the job is done.” — Muzaffer Selimbeyoglu 📌 Background Degree in Computer Science CCNA | RHCE Diploma in Computer Hardware & Electronics GitHub Portfolio: fuzonmedia

"Sadik is the single best freelance resource I've ever used on any project." - Upwork client I build the membership platforms, custom web apps, and high-traffic sites that other developers can't finish. Senior Full-Stack PHP & WordPress developer, 12+ years. Top Rated Plus, 100% Job Success across 114 jobs, 10,026 hours billed, and $500K+ earned on Upwork. I specialize in long-running, complex engagements, not quick fixes. My flagship is a 5+ year build of a custom PHP/MariaDB supply-chain ERP (2,700+ hours, sole architect): inventory, shipments, batch lifecycle tracking, and a cron-based background processing layer. 🌟What I deliver: - Membership & subscription platforms (Paid Membership Pro, MemberPress) with Stripe/PayPal recurring billing - Custom PHP business applications & ERP systems built from the ground up - Large-scale CMS & forum migrations (vBulletin to XenForo, Joomla to WordPress, cross-database consolidation) - WordPress performance rescue: database, hosting, and query optimization on Kinsta/VPS - Custom WordPress plugins, themes, and CRM/API integrations 🌟Recent client wins: - Cut a 12-second page load to normal by fixing an unindexed query; reduced WordPress autoloaded options from 17.7MB to 0.6MB - Built and ran a membership platform for an Australian investor community with recurring subscription revenue - Architected a $150K+ custom ERP processing inventory, shipments, and batch lifecycles - Cleaned 979K form entries and 7.8M meta rows to dramatically reduce database load - Migrated multiple legacy forums to XenForo with zero data loss 🌟Perfect for: Founders running membership/subscription sites, businesses needing a custom internal platform or ERP, and site owners with a WordPress performance or migration problem nobody else can solve. 🌟Why clients keep me for years: I hold multiple 4-5 year ongoing retainers because I communicate clearly, deliver on schedule, and understand the real business behind the spec. As one client put it, "incredibly pro-active and accurate." Send me your project or pain point and I'll reply with a clear assessment and realistic roadmap. Available for complex builds, rescue projects, and long-term partnerships.

🌟 𝐙𝐨𝐡𝐨 𝐎𝐧𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 || 6+ 𝐘𝐞𝐚𝐫𝐬 𝐨𝐟 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐢𝐧 𝐂𝐑𝐌 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬, 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬, 𝐚𝐧𝐝 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 Hello! I'm a Zoho One Developer with over 5 years of hands-on experience delivering high-quality CRM solutions, system integrations, and automation for businesses of all sizes. I specialize in designing, implementing, and customizing Zoho One to meet unique business requirements. By leveraging Zoho’s powerful tools, I help businesses streamline processes, enhance productivity, and build stronger customer relationships. 𝐖𝐡𝐚𝐭 𝐈 𝐎𝐟𝐟𝐞𝐫 👉 Zoho One Development: Customizations, workflows, automation, dashboards, and reporting to ensure seamless operations across sales, marketing, and support. 👉 System Integration: Seamless integration of Zoho One with third-party applications to create a unified, connected ecosystem. 👉 CRM Optimization: Enhancing CRM workflows, customizing user interfaces, and building tailored solutions to improve efficiency and drive growth. 👉 Data Migration & Security: Safe and efficient migration of data from legacy systems or other platforms, ensuring data integrity and security. 👉 Business Process Automation: Using Zoho’s extensive suite of tools—such as CRM, Creator, Desk, Projects, Books, and Flow—to automate and optimize critical business operations. 𝐖𝐡𝐲 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞? ✅ Proven Expertise: With over 5 years of experience, I’ve successfully delivered measurable results for clients across various industries. ✅ Client-Focused Solutions: I take the time to understand your unique business needs and craft tailored Zoho solutions that align with your goals. ✅ Efficient Communication: Timely, professional, and transparent communication to ensure smooth project execution and collaboration. ✅ High-Quality Results: Committed to delivering solutions that are on time, within scope, and of the highest quality standards. 𝐋𝐞𝐭’𝐬 𝐖𝐨𝐫𝐤 𝐓𝐨𝐠𝐞𝐭𝐡𝐞𝐫 Ready to transform your business with Zoho One? Let’s collaborate to optimize your operations and automate your processes for maximum efficiency and growth. 📩 Contact me today to discuss your project and explore how I can help!

I help businesses build professional websites, ecommerce stores, landing pages, dashboards, and automation systems that actually support sales and operations. I work mainly with Shopify, WooCommerce, Webflow, GoHighLevel, WordPress, and custom full-stack applications. I also build AI and automation workflows using tools like OpenAI, n8n, Make, Zapier, Airtable, Google Sheets, CRMs, and custom APIs. What I can help you with: • Shopify store setup, redesign, product pages, landing pages, custom sections, checkout improvements • WooCommerce stores, product bundles, checkout flows, payment setup, order automation • Webflow websites, responsive landing pages, CMS setup, design-to-Webflow builds • GoHighLevel funnels, landing pages, CRM setup, forms, automations, email/SMS flows • AI automation using OpenAI, Claude, Gemini, n8n, Make, Zapier, Airtable, Google Sheets and APIs • Full-stack web apps using React, Next.js, Node.js, Python, Supabase, PostgreSQL and REST APIs • Website speed optimization, bug fixing, domain setup, tracking pixels, Google Search Console and analytics I focus on clean design, clear user flow, mobile responsiveness, fast loading speed, and practical automation that reduces manual work. I have worked on ecommerce stores, SaaS dashboards, AI tools, internal portals, automation workflows, and business websites for clients across different industries. If you need someone who can handle both the website side and the backend/automation side, I can help you plan, build, test, and launch the full solution.

In whichever field one chooses to ply his or her services, binding one's energies to one's goal is very important. This might sound a cliche but holds true in all situations. I have always held the conviction that if a person works honestly towards a goal he sets himself, there is very little chance of being digressed. I use this fundamental philosophy for every genre of service on Upwork thus fetching greatest satisfaction from my clients invariably.

⭐️⭐️⭐️⭐️⭐️ ⭐️ 12x CERTIFIED Salesforce Developer | Admin | Consultant | Architect ⭐️ You are invited to verify my SALESFORCE CREDENTIALS ⭐️ In the Top 1% of all Upwork Talent with EXPERT-VETTED IDENTIFIED ⭐️ Salesforce Community Group Leader | Answer's Leader on Trailhead ⭐️ 3-Time Dreamforce Hackathon Developer Coding Challenge Winner ✅ Prepare to meet your Salesforce Expert! With over 10 years of mastering Salesforce development, I specialize in crafting seamless solutions that harmonize with the Salesforce ecosystem, spanning Sales, Service, and Marketing Clouds. My skill set extends to Lightning Web Components Development, where I infuse efficiency and innovation into your projects. ✅ Specializing in Salesforce Sales Cloud, Service Cloud, Pardot, Community Cloud, Commerce Cloud, Tableau, Power BI, CPQ, Apttus, QuickBooks, Marketing Cloud, Einstein Analytics, and many more. I can assist with everything from simple configurations to complex Salesforce buildouts and integrations. My experience spans working with companies of all sizes, from 2 users to over 12,000. Expert-Vetted Salesforce Freelancer on UpWork with 10 years of experience in Salesforce. I have worked with 🌟High Profile Clients🌟 in my Salesforce Career, including the following to illustrate some of them: ✅ Johnson & Johnson(Fortune 500 Company) ✅ US Bank ✅ The Trusted Home Buyer ✅ FinancialForce 🏆 Here is a list of Salesforce Certifications I hold: - Salesforce Certified Sales Cloud Consultant - Salesforce Certified Platform App Builder - Salesforce Certified Experience Cloud Consultant - Salesforce Certified Administrator - Salesforce Certified OmniStudio Developer - Salesforce Certified JavaScript Developer I - Salesforce Certified Platform Developer I - Salesforce Certified Platform Developer II - Salesforce Certified Community Cloud Consultant - Salesforce Certified Advanced Administrator (ADM 211) - Salesforce Certified Service Cloud Consultant. ✅ Salesforce Development Services:- - Apex Classes - Apex Triggers - Visual Force pages - LWC Pages - Lightning Aura - Integrations (WSDl / Json/ XML) - Rest API - Web services - Developing AppExchange Products - J Queries, Java Scripts ✅ Salesforce Consulting Services:- - AppExchange Tools - Administrator and End-user Training Documents - Consulting on moving to Salesforce.com - Go Live Document ✅ Salesforce Administration Services:- - Configuring the Vanilla Salesforce.com - Object/Field Creation - Setting up Users, Roles & Profiles - Creating Flows - Loading data via Data Loader - Various Reports & Dashboards - Chatter Functionality - Data Cleansing - Setting up Campaigns & Email Marketing Tools ⭐️Key Highlights: 🌟 Currently Featured as the Top Salesforce Freelancer in the Solution Architecture and Business Application Development on UpWork, which has over 116,000 Freelancers in the Category (Refer to Portfolio Section of my Profile for Details) 🌟 Hold 12X Salesforce Certifications Why me: .Lightning component using Aura and LWC .Veeva in salesforce .Visualforce, Javascript, JQuery, Angular JS, CSS, Html .Apex Class, Apex Trigger, Batch Apex, Test Class .SOQL, SOSL .Email Service, Web2Lead, Web2Case .Webservices- SOAP, REST, XML over Http .Workflow, Flows .Integration using SOAP and REST APIs .Data Migration from legacy CRM to Salesforce .Force.com Sites, Site.com .Communities: Customer Communities, Partner Communities .Chatter, Live Chat .Call Center Integration using CTI Adapters .Soft Phone, Click-2-Call, Call Blast, SMS Broad Cast using Twilio .SteelBrick CPQ .Breadwinner .Docusign Other than Salesforce I am also pretty good at Core Java, JSP, Servlet, EJB, WebService, PHP, HTML5, Phone Gap. Warranty: I provide 4 weeks of warranty support free of cost after deployment to production. Lets connect and discuss.