Back-end programming * Expert-level Database Design and Implementation. * Extensive experience in back-end application development, accessing databases for both extraction and update. * Experienced in API development, both as client (e.g., importing data from external vendor API) and server (writing RESTful APIs). General programming * Highly experienced in maintenance of existing legacy code, as well as new development. * Excellent coding and bug-fixing skills in Python, Perl, C, PHP and Pick Basic. * Desktop applications using Python tkinter. * Many years experience in process automation. Databases: MySQL, PostgreSQL, SQLite, Oracle, SQL Server, Access Source control: Git, CVS, SVN, Perforce Specialty: Finding solutions to difficult problems.

Analytics and Reporting Consultant based in Spain. Focused mainly on Business Intelligence analysis and implementations projects for more than 10 years. Worked with SAP BW/BO, S4HANA, BW4HANA and others (Microstrategy, Power BI, etc.). Holding a degree in Industrial Engineering specialized in Industrial Constructions from Institut Químic de Sarrià (IQS). Proud EMBA at IESE Business School, gratuated in 2022. Activities performed cover from understanding business needs collecting their requirements, analysis of their KPI's and proposal of new reports to design phase, implementation of the solution, testing and go-live and team management and project leading. Experience in both functional and technical areas.

Top Rated · 100% Job Success · You keep full ownership of everything I build. I am a full stack developer, database architect, and SaaS developer. I design scalable database systems, build production-ready web applications, and integrate AI into products that work for real users. Full stack developer. Next.js. TypeScript. End to end. As a full stack developer I own the entire stack PostgreSQL schema design, Node.js backend, Next.js and React frontend, REST API integrations, Stripe payments, and Vercel deployment. Need a full stack developer who takes ownership from database to deployment without hand-holding? Let's talk. Recent full stack work includes a multi-tenant property management SaaS on Next.js and Supabase with role-based access, admin dashboards, and OpenAI integrations and a freelance marketplace with a GraphQL API layer, BullMQ background job queues, and row-level security enforcing per-user data isolation across clients and freelancers. Database architect. PostgreSQL. Supabase. SQL. Production-grade. As a database architect I design schemas from scratch normalization, ERD modelling, indexing strategies, query optimization, and Row Level Security policies. I migrate businesses from messy Excel and Google Sheets into clean, scalable PostgreSQL and Supabase systems with zero data loss and full audit trails. Recent database work includes a fuel business management platform with complex relational schema covering customers, orders, deliveries, invoicing, and payment cycles and a POS system with real-time inventory tracking, sales reporting, and automated invoice generation, all built on Supabase and PostgreSQL. Backend developer. Node.js. NestJS. REST APIs. As a backend developer I build structured, scalable Node.js and NestJS APIs with TypeScript end to end modular architecture, dependency injection, guard-based authentication, and clean REST API layers. I design and implement authentication flows, role-based access control, webhook handling, and background job processing for production applications that need to scale reliably. SaaS developer. Multi-tenant. Stripe. Production-ready. As a SaaS developer I build complete products end to end authentication, database, Stripe subscriptions and webhooks, dashboards, role-based access, and deployment. I have delivered a business management platform with automated PDF invoicing, cron-based billing cycles, and email dispatch via Resend; a wedding management system with client records, fare packages, and booking history; and a lead management dashboard with WhatsApp automation via ManyChat and automated drip campaigns. AI developer. OpenAI. Claude API. LLM integrations. As an AI developer I integrate LLM APIs into production applications document processing pipelines, AI-powered workflow automation, structured prompt engineering, and AI-assisted data extraction. All API keys handled server-side, never exposed to the browser. I have built OpenAI and Claude integrations into SaaS platforms delivering real features, not demos. Security. Supabase RLS. Multi-tenant isolation. I implement Row Level Security on every Supabase project enforcing per-user and per-tenant data isolation at the database level, not just the application layer. RLS policies, protected API routes, secure file access via signed URLs, and environment variable hygiene are standard practice on every project I deliver. Integrations. Automation. Third-party APIs. QuickBooks API integration for financial data sync into web dashboards. Airtable integrations. ManyChat and WhatsApp API automation. Resend for transactional email. Stripe checkout, subscriptions, webhooks, and billing portals. REST API development and third-party service connections across every project. How I work: Daily updates, no ghosting. Honest timelines. 30+ hours per week. 0–4 hour response time. I use Cursor and Claude Code daily to move fast without cutting quality. Full code ownership transferred on every handover. Stack: PostgreSQL · Supabase · SQL · pgvector · MongoDB · Prisma · Redis · Next.js · React · Nest.js · TypeScript · JavaScript · Tailwind CSS · Shadcn UI · Stripe · OpenAI · Claude API · Node.js · Express · Docker · Vercel · Railway · AWS · Cloudflare R2 · QuickBooks API · Airtable · ManyChat · WhatsApp API · Resend · GraphQL · BullMQ · REST APIs Message me with what you need database design, SaaS build, AI integration, or all three. I'll give you a straight answer on whether I can help and how long it takes.

I am Mihir Sheth, an Analytics Engineer with a keen interest and capability of developing data driven solutions that solve modern problems.

42+ Empowered Clients | 7+ years of experience | Cloud Evangelist | Copilot & Azure AI Microsoft Foundry | Microsoft Dynamics 365 | Power Platform Architect | D365 Business Central ERP I specialize in crafting tailored solutions that streamline your business processes, enhance customer engagement, and drive operational excellence. Whether you're looking to implement AI enabled Dynamics 365 Business Central ERP, Sales, Customer Service, Marketing, Finance, or any other Microsoft application, I offer end-to-end consultancy, customization, integration, development and support services. From initial assessment to deployment and ongoing optimization, I ensure your Dynamics 365 and Artifical Intelligence ecosystem aligns perfectly with your organizational objectives and hits the ROI Microsoft promises. My Areas of expertise include: - Microsoft Azure AI - Microsoft Copilot Studio - Microsoft Dynamics 365 Business Central - Microsoft Dynamics 365 Customer Engagement Apps - Microsoft Power Platform Development - Dynamics CE - Solutions Architecture & Design. - Dynamics CE - Customizations & Deployments. - Dynamics CE - Development, Integrations & Data Migrations. - Dynamics 365 Sales, Customer Service, Field Service, Customer Insights and Journeys (Marketing), Project Operations, Human Resources, Business Central, Finance, PowerApps, Power Automate, Power Pages, Power BI, Microsoft Fabric & Azure Active Directory. - Business Analysis, Consulting & Project Management. - Expert in Information Technology. - MS SQL Server, .NET Framework, C#, JavaScript, custom actions, custom activities, liquid, AL, X++. I'm a cloud evangelist who really believes in AI and digital transformation of the businesses and could go to any depth to resolve my people's problems. The Future Looks Bright! Cheers!

⭐ 𝙏𝙧𝙪𝙨𝙩𝙚𝙙 𝙗𝙮 𝙜𝙡𝙤𝙗𝙖𝙡 𝙗𝙧𝙖𝙣𝙙𝙨 𝙞𝙣𝙘𝙡𝙪𝙙𝙞𝙣𝙜 𝙇'𝙊𝙧é𝙖𝙡, 𝙌𝙪𝙖𝙣𝙩𝘽𝙤𝙭, 𝙖𝙣𝙙 𝘿𝙞𝙜𝙞𝙢𝙞𝙣𝙙, 𝙙𝙚𝙡𝙞𝙫𝙚𝙧𝙞𝙣𝙜 𝙙𝙖𝙩𝙖-𝙙𝙧𝙞𝙫𝙚𝙣 𝙨𝙤𝙡𝙪𝙩𝙞𝙤𝙣𝙨 𝙩𝙝𝙖𝙩 𝙞𝙢𝙥𝙧𝙤𝙫𝙚 𝙧𝙚𝙥𝙤𝙧𝙩𝙞𝙣𝙜, 𝙛𝙤𝙧𝙚𝙘𝙖𝙨𝙩𝙞𝙣𝙜, 𝙖𝙣𝙙 𝙗𝙪𝙨𝙞𝙣𝙚𝙨𝙨 𝙙𝙚𝙘𝙞𝙨𝙞𝙤𝙣-𝙢𝙖𝙠𝙞𝙣𝙜. 🐍 Senior Data Scientist | Python Developer | Data Analyst | Machine Learning Engineer 📊 Power BI | Tableau | Looker Studio | Dashboard Development | Business Intelligence 🥇 Microsoft Certified Power BI Data Analyst (PL-300) With 6+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞, I help businesses transform raw data into actionable insights through 𝐢𝐧𝐭𝐞𝐫𝐚𝐜𝐭𝐢𝐯𝐞 𝐝𝐚𝐬𝐡𝐛𝐨𝐚𝐫𝐝𝐬, 𝐩𝐫𝐞𝐝𝐢𝐜𝐭𝐢𝐯𝐞 𝐚𝐧𝐚𝐥𝐲𝐭𝐢𝐜𝐬, 𝐦𝐚𝐜𝐡𝐢𝐧𝐞 𝐥𝐞𝐚𝐫𝐧𝐢𝐧𝐠 𝐦𝐨𝐝𝐞𝐥𝐬, 𝐚𝐧𝐝 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐞𝐝 𝐝𝐚𝐭𝐚 𝐩𝐢𝐩𝐞𝐥𝐢𝐧𝐞𝐬. I've successfully delivered solutions for global organizations including 𝐋'𝐎𝐫é𝐚𝐥, 𝐃𝐢𝐠𝐢𝐦𝐢𝐧𝐝, 𝐚𝐧𝐝 𝐐𝐮𝐚𝐧𝐭𝐁𝐨𝐱, helping stakeholders make faster, data-driven decisions. 𝐖𝐡𝐚𝐭 𝐈 𝐜𝐚𝐧 𝐡𝐞𝐥𝐩 𝐲𝐨𝐮 𝐰𝐢𝐭𝐡: ✅ 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐈𝐧𝐭𝐞𝐥𝐥𝐢𝐠𝐞𝐧𝐜𝐞 & 𝐃𝐚𝐭𝐚 𝐕𝐢𝐬𝐮𝐚𝐥𝐢𝐳𝐚𝐭𝐢𝐨𝐧 ➠Power BI Dashboards ➠Tableau Dashboards ➠Looker Studio Dashboards ➠Executive & KPI Dashboards ➠Interactive Reports ➠DAX & Power Query ➠Data Storytelling ✅ 𝐃𝐚𝐭𝐚 𝐒𝐜𝐢𝐞𝐧𝐜𝐞 & 𝐌𝐚𝐜𝐡𝐢𝐧𝐞 𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠 ➠Python (Pandas, NumPy, Scikit-learn) ➠Predictive Analytics ➠Forecasting & Time Series Analysis ➠XGBoost & Machine Learning Models ➠Customer Segmentation ➠Clustering & Classification ➠Feature Engineering ✅ 𝐃𝐚𝐭𝐚 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 & 𝐀𝐧𝐚𝐥𝐲𝐭𝐢𝐜𝐬 ➠SQL (SQL Server, MySQL, PostgreSQL) ➠ETL Pipeline Development ➠Data Cleaning & Data Wrangling ➠Data Modeling ➠Data Warehousing ➠BigQuery ➠Snowflake ➠Azure Databricks ✅ 𝐌𝐚𝐫𝐤𝐞𝐭𝐢𝐧𝐠 & 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐀𝐧𝐚𝐥𝐲𝐭𝐢𝐜𝐬 ➠Google Analytics ➠Marketing Performance Dashboards ➠Sales Analytics ➠Financial Reporting ➠Customer Analytics ➠Business Performance Reporting ➠Automated Reporting Solutions 𝐖𝐡𝐲 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡 𝐦𝐞: ✔ Build scalable dashboards that executives actually use. ✔ Automate manual reporting to save hours every week. ✔ Develop accurate forecasting and machine learning models for smarter business planning. ✔ Transform messy, complex datasets into clean, reliable, and actionable insights. ✔ Deliver clean, well-documented code, clear communication, and on-time project completion. Whether you need a 𝑷𝒐𝒘𝒆𝒓 𝑩𝑰 𝑫𝒂𝒔𝒉𝒃𝒐𝒂𝒓𝒅, 𝑻𝒂𝒃𝒍𝒆𝒂𝒖 𝑫𝒂𝒔𝒉𝒃𝒐𝒂𝒓𝒅, 𝑷𝒚𝒕𝒉𝒐𝒏 𝒅𝒂𝒕𝒂 𝒂𝒏𝒂𝒍𝒚𝒔𝒊𝒔, 𝑺𝑸𝑳 𝒅𝒆𝒗𝒆𝒍𝒐𝒑𝒎𝒆𝒏𝒕, 𝒎𝒂𝒄𝒉𝒊𝒏𝒆 𝒍𝒆𝒂𝒓𝒏𝒊𝒏𝒈 𝒔𝒐𝒍𝒖𝒕𝒊𝒐𝒏, 𝑬𝑻𝑳 𝒑𝒊𝒑𝒆𝒍𝒊𝒏𝒆, 𝑺𝒏𝒐𝒘𝒇𝒍𝒂𝒌𝒆, 𝑨𝒛𝒖𝒓𝒆 𝑫𝒂𝒕𝒂𝒃𝒓𝒊𝒄𝒌𝒔, 𝑩𝒊𝒈𝑸𝒖𝒆𝒓𝒚, or an end-to-end analytics solution, I can help turn your data into measurable business value. 𝐋𝐞𝐭'𝐬 𝐝𝐢𝐬𝐜𝐮𝐬𝐬 𝐲𝐨𝐮𝐫 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 𝐚𝐧𝐝 𝐛𝐮𝐢𝐥𝐝 𝐚 𝐝𝐚𝐭𝐚 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧 𝐭𝐡𝐚𝐭 𝐝𝐫𝐢𝐯𝐞𝐬 𝐫𝐞𝐬𝐮𝐥𝐭𝐬.

✅ ABOUT ME: I am a Professional Full Time Freelancer. I have 8+ years of experience working on Windows/Linux server administration, CICD Devops ,AWS, Azure, windows/Linux troubleshooting, HyperV, proxmox servers, DNS records mapping, IIS, Domains and DNS records management, active directory, web server, webhosting, databases administrations and Mail server implementations, administrations for the mail services MS Office365, Gsuite, Zimbara and postfix . ✅ WHY ME? • Full-time Professional – I work on Upwork as a full-time freelancer. I take every project seriously and I am highly professional. • Highly responsive – I’ll always get back to you in less than 02 hours. • 100% Client satisfaction – I provide revisions and modifications even after our contract ends. • I provide accurate solutions and just as important, I can guide you to future prospects and put your project on the right track. • Good communication skills – You will find me very friendly to talk to. ========================================= #Windows Servers - clients #Linux Server - clients #Web servers - IIS, Apache, XAMPP, Nginx and Tomcat #Database Servers - MSSQL, ORACLE, MYSQL, MongoDB #Webhosting tools- Plesk, cPanel and CWP #Cloud services providers - AWS, Azure, GCP, Digital Ocean, World stream, OVH Cloud, Hetzner and Hosting raja #Hosting providers - Hostinger, Bluehost, Namecheap, Godaddy, Bigrock and Hostgator #Active Directory - setup, users creation, Centralized Management, policy creation and enhanced Security #Troubleshooting - L1, L2 Tools used ============== Github, SVN IIS,Apache,Tomcat,Nginx , Apache Kafka and Wordpress SSH, RDP, VNC, Anydesk, Splashtop and screen connect Mobaxterm,Toad,SSMS and Workbench Plesk,WHM,Cpanel Active Directory, IAM Servicenow, Redmine, Microsoft Teams and Slack Previous Clients Feedback: 1- "Karthik was an exceptional Upworker to deal with. He was responsive, communicative, knowledgeable and proactive at solving my urgent technical issue (my businesses website was down for an unknown reason) and I wouldn't hesitate to recommend him to anyone else seeking an excellent technical support specialist. Thank you Karthik!" 2- "Karthik went above and beyond to progress with a very difficult issue in a very short period of time. He is kind, hard-working, and knowledgeable." 3- "I recently had the pleasure of working with "Karthik Raja" on installing PMB Software project, and I must say it was an outstanding experience from start to finish. I highly recommend "Karthik Raja" to anyone seeking top-notch freelancing services." 4- "he provides ideas to solve our problems he is a best gem have ever met. He focused only in customer satisfaction. no negative reviews." So why wait? Just invite me to your job on Upwork so we can discuss how to make your project a success. Let’s work together and get it done!! Thanks, Karthik

Microsoft Access and programming in Visual Basic are my specialties. I've spent more than 20 years working primarily with these platforms and am currently searching for freelance employment. I am knowledgeable with MS SQL, Azure, SQL Lite, and MySQL for database back-end. I have a lot of experience with VB programs, Access VBA data import/export, and data manipulation (Excel, Text Files, CSV, etc.). Please take me into consideration if you have a project for your company or wish to modify an existing system using these platforms. 

Hi, I’m Faizan 👋 Highly technical Senior .NET Systems Developer, Microsoft Dynamics 365 Specialist, and Technical Lead with 7+ years of enterprise experience engineering scalable applications, modern microservices, and deep cloud integrations. Expert in building high-performance C# backend architectures (.NET Core / Framework) while seamlessly extending Dynamics 365 Customer Engagement (CE) via custom C# Compiled Plug-ins, custom workflow activities, and Dataverse Web APIs. I bridge the gap between custom cloud-native code and standard Microsoft ERP/CRM capabilities. Proactive in establishing Clean Architecture principles, strict RBAC data guardrails, and optimizing complex SQL Server backends within Scaled Agile Frameworks (SAFe). 🚀 𝗠𝘆 𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: Dynamics 365 & Power Platform: Customizing and extending Dynamics 365 CE, building robust C# Plug-ins, Custom Workflow Activities, JavaScript/TypeScript client-side scripting, Dataverse web API integration, Canvas/Model-Driven Apps, and enterprise Power Automate flows. .NET Backend & API Development: Expert design of RESTful APIs, ASP.NET Web API, and C# Microservices using modern .NET environments and legacy .NET Framework architectures. Full-Stack Web Development: Clean, responsive frontends built for .NET and Dynamics-adjacent web portals using React, Next.js, Angular, TypeScript, and Tailwind CSS. Enterprise Integration & Desktop: Engineering secure Windows App solutions (WPF, WinForms) and middleware pipelines connecting Dynamics 365 with third-party ecosystems or on-premise Microsoft SQL Server databases. High-Performance SQL Databases: Advanced database programming, complex data migrations to Dataverse/SQL, and strategic query optimization utilizing Microsoft SQL Server, PostgreSQL, and MySQL. Cloud DevOps & Azure: Full cloud orchestration and Microsoft Azure deployment (Azure App Services, Azure Functions, Azure Service Bus) engineered to handle heavy hybrid workloads. AI & Workflow Automation: Advanced AI Agent development and deterministic n8n/Power Automate pipelines leveraging OpenAI and Claude within corporate systems. 💼 𝗜 𝗖𝗮𝗻 𝗛𝗲𝗹𝗽 𝗬𝗼𝘂 𝗪𝗶𝘁𝗵: Dynamics 365 Customization & Extension: Writing flawless C# plug-ins, custom workflows, and API integrations to make Dynamics 365 conform perfectly to your unique business logic. Legacy System Modernization & CRM Migration: Migrating legacy .NET Framework applications, on-premise databases, and older CRM systems directly into modern cloud-native .NET Core and Dynamics 365 environments. Custom SaaS Product & Enterprise Development: Taking your software ecosystem from MVP to live production using robust .NET architectures deeply integrated with Microsoft cloud ecosystems. AI-Powered Workflow Automation: Building intelligent data processing pipelines, Document AI, and LLM tool integrations inside your Microsoft and .NET environments. Performance Optimization & Data Refactoring: Eliminating Microsoft SQL Server or Dataverse performance bottlenecks, advanced indexing, and delivering accurate technical roadmaps. 🌟 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲: 7+ Years of Real-World Experience: Proven technical delivery as a Senior Developer across complex SaaS, fintech, and enterprise operations management spaces. Future-Proof Hybrid Architecture: Strong adherence to SOLID principles, Clean Architecture, and strict security boundaries when combining custom code with standard Microsoft platforms. Technical Leadership: Extensive experience managing project plans, leading engineering sprints, and conducting rigorous code reviews to keep budgets and timelines perfectly aligned. I don’t just write code—I build reliable, scalable systems that solve real business problems and maximize your Microsoft investment. 📩 Let’s connect! Share your project requirements, and I’ll help you turn them into a powerful, scalable Dynamics 365 and .NET solution. 🔧 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀: Dynamics 365 Developer | Dynamics 365 CE Specialist | Power Platform Developer | PowerApps Consultant | Power Automate Expert | Dataverse Developer | .NET Developer Upwork | ASP.NET Core Developer | C# Developer | .NET Web Development | .NET API Development | .NET Backend Developer | .NET Full Stack Developer | .NET Core Developer | Dynamics 365 Plug-in Developer | .NET SQL Server Developer | .NET Azure Developer | .NET Migration & Upgrade Services | Windows Desktop Application Development | Senior .NET Developer | C# Programmer | Microsoft SQL Server Expert

I build and improve business systems that people actually rely on — data pipelines, approval workflows, reporting platforms, and automation tools built on Excel, VBA, and SQL. My longest engagement is an 8-year partnership with a 15,000-person construction enterprise, where I built their entire analytics infrastructure from scratch. The platform consolidates data across 15 regional branches, 12 project management teams, and their subcontractors — tracking 100+ active projects down to materials, equipment, and personnel. Used daily by 300+ employees across the organization. Most of my clients come back. Construction, real estate, fitness, trading, manufacturing — different industries, same pattern: something wasn't working well enough, now it does. If you have a system that needs to be built right, or one that needs to finally work the way it should — let's talk. What I work with: Excel VBA · SQL Server · Complex reporting · Approval workflows · Data integration · Long-term support