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⭐ Microsoft Certified Developer ⚡ Senior Full-Stack .NET Core Developer 10+ years | 50+ enterprise systems | API Integration & Azure Expert | C# / ASP.NET Core / SQL Senior Full-Stack Developer with 10+ years of experience delivering 50+ enterprise-level Web Development and Web Application systems using C#, .NET Framework, ASP.NET, ASP.NET Core, ASP.NET MVC, JavaScript, React, Angular, AngularJS, TypeScript, HTML, HTML5, CSS, API, API Development, RESTful API, API Integration, Microsoft SQL Server, PostgreSQL, SQL, Microsoft Azure, Azure DevOps, CI/CD, Amazon Web Service, Node.js, PHP and Python. I build scalable Web Application platforms with clean API Integration, optimized SQL, and production deployments on Microsoft Azure using C#, .NET Core, ASP.NET Core, React, Angular and JavaScript. I also develop AI powered systems using OpenAI API, OpenAI, Claude, Claude API, LangChain, FastAPI, RAG, Artificial Intelligence, Machine Learning and Natural Language Processing. If you need a developer who can build scalable production-ready systems fast let’s talk. I have built 100+ API Integration and API Development solutions using C#, .NET Core, .NET Framework, ASP.NET, ASP.NET Core, ASP.NET MVC and RESTful API architecture, integrating systems across Microsoft Azure, Azure DevOps, CI/CD pipelines and Amazon Web Service. I have implemented 70+ automation workflows using API Integration, Node.js, Python, FastAPI and SQL-based processing across Microsoft SQL Server and PostgreSQL environments. I have delivered 50+ Web Application systems including SaaS platforms, internal tools, dashboards and integration-heavy solutions using C#, ASP.NET Core, .NET Core, JavaScript, React, Angular, AngularJS, TypeScript, SQL, Microsoft SQL Server, PostgreSQL and API Integration deployed on Microsoft Azure and Amazon Web Service. My focus is combining backend architecture with modern Web Development and Web Design for scalable systems. ⚡ What I Build 🔹 Web Application systems processing 100k+ API requests daily using C#, ASP.NET Core, RESTful API, API Development, Microsoft SQL Server, PostgreSQL and SQL optimization 🔹 Integration-heavy platforms using C#, .NET Framework, ASP.NET MVC, ASP.NET Core, API Integration, RESTful API and Node.js connected to CRMs, SaaS tools and external APIs 🔹 Cloud-based systems deployed on Microsoft Azure, Azure DevOps, CI/CD and Amazon Web Service with scalable backend architecture 🔹 Frontend interfaces using JavaScript, React, Angular, AngularJS, TypeScript, HTML, HTML5 and CSS with responsive Web Design 🔹 AI powered features using OpenAI API, OpenAI, Claude, Claude API, LangChain, FastAPI, RAG, Artificial Intelligence, Machine Learning and Natural Language Processing integrated into existing Web Application platforms ⚡ What Makes Me Different Most developers build features. I build scalable systems. As a Senior Full Stack Developer, I focus on: 🔹 API Development and RESTful API architecture using C#, .NET Core, ASP.NET Core and ASP.NET MVC 🔹 Complex API Integration across enterprise systems using Microsoft Azure and Azure DevOps 🔹 High-performance Microsoft SQL Server, PostgreSQL and SQL optimization 🔹 Cloud-native deployment using Microsoft Azure, Azure DevOps, CI/CD and Amazon Web Service 🔹 Full-stack Web Development using JavaScript, React, Angular, AngularJS, TypeScript, HTML, HTML5 and CSS 🔹 AI powered automation, ai agent workflows and AI Integration using OpenAI API, OpenAI, Claude, Claude API, LangChain and FastAPI I design systems where C#, ASP.NET Core, .NET Core, Microsoft SQL Server, PostgreSQL, SQL, React, Angular and Microsoft Azure work as a unified architecture. My focus is production-grade Web Application systems with clean API Integration, scalable infrastructure and maintainable backend architecture built with C#, .NET Framework, ASP.NET, ASP.NET Core and ASP.NET MVC. ⚡ Core Stack C#, .NET Core, .NET Framework, ASP.NET, ASP.NET Core, ASP.NET MVC, JavaScript, React, Angular, AngularJS, TypeScript, Node.js, PHP, Python, HTML, HTML5, CSS, SQL, Microsoft SQL Server, PostgreSQL, Microsoft Azure, Azure DevOps, CI/CD, Amazon Web Service, API, API Development, RESTful API, API Integration, Web Development, Web Application, Web Design, OpenAI API, OpenAI, Claude, Claude API, LangChain, FastAPI, ai agent, ai automation, ai powered systems, RAG, Artificial Intelligence, Machine Learning, Natural Language Processing. I am currently available for Web Development, API Development, API Integration, AI Integration, ai automation and enterprise .NET development using C#, ASP.NET Core, .NET Core, Microsoft SQL Server, PostgreSQL, Microsoft Azure, React and Angular.

I build startup-ready web products using React / Next.js / Node.js, from first MVP to scalable production with a strong focus on speed, quality, and maintainability. If you need a senior engineer who can take ownership, translate Figma into a clean UI, ship reliably, and keep your codebase healthy as you iterate, you’re in the right place. What I deliver 🔹Frontend: React + Next.js (SSR/SEO, performance, component systems, pixel-perfect UI) 🔹Backend: Node.js (REST APIs, microservices, integrations, background jobs, event ingestion) 🔹Data: PostgreSQL / MSSQL / MongoDB / Supabase (schema design, migrations, indexing, performance tuning) 🔹Engineering quality: clean architecture, CI/CD, TDD/unit tests where it makes sense, practical docs 🔹AI features & workflows: LLM-powered product features + AI-driven development to accelerate delivery (automation for refactoring/testing/debugging - not “vibe coding”) Why startups hire me 🔹20+ years in software engineering, including senior/tech lead roles, comfortable in fast-moving environments. 🔹Proven delivery in MarTech and Healthcare: built React modules that improved rendering speed and reduced bundle size via code-splitting; shipped Node.js microservices for attribution/event processing and real-time analytics to increase throughput and reduce latency. 🔹Modernization & reliability: migrated legacy systems to Azure, rebuilt backends in Node.js, designed event-driven architectures, and performed security-focused work for regulated domains. I’m based in CET (Valencia, Spain) and regularly collaborate with US & EU teams with overlapping hours. Let’s talk. Share your idea, current stack, and timeline. I’ll propose a pragmatic plan, and we can start with a small milestone (audit, prototype, or one feature) to confirm fit.

👋 Hello! I am a Microsoft Dynamics 365 CRM and Power Platform specialist with 8+ years of experience in designing, implementing, and optimizing Customer Relationship Management (CRM) solutions that drive business success. I specialize in Microsoft Dynamics 365 Customer Engagement (CE) and Power Platform (Power Apps, Power Automate, Power BI) to help businesses automate workflows, improve customer engagement, and streamline processes. 🔹 How I Can Help You ✔️ CRM Implementation & Customization – Tailored D365 CE solutions to match your business processes ✔️ Customer Service & Sales Automation – Configuring Workflows, Business Process Flows, and AI-driven insights ✔️ Power Apps Development – Building custom low-code apps that integrate seamlessly with Dynamics 365 ✔️ Power Automate (Flow) Integration – Automating tasks between Dynamics 365, Outlook, SharePoint, and more ✔️ Data Migration & ETL – Using KingswaySoft SSIS, Azure Data Factory for seamless CRM data transfers ✔️ CRM Dashboards & Reporting – Creating Power BI reports to visualize business performance ✔️ Integration with Third-Party Systems – Connecting Dynamics 365 with ERP, SharePoint, Teams, Azure, and other platforms 🔹 My Technical Skills & Tools ✔️ Microsoft Dynamics 365 CE (Sales, Customer Service, Field Service) ✔️ Power Platform (Power Apps, Power Automate, Power BI) ✔️ Dataverse (CDS) – Secure data management for Power Apps & Dynamics ✔️ Custom Development – C# .NET, Web API, JavaScript, MS SQL, SSRS ✔️ Agile & DevOps Practices – Sprint planning, task breakdown, CI/CD pipelines ✔️ Cloud & Security – Azure AD, OAuth, Role-Based Access Control (RBAC) 🚀 Why Work With Me? ✅ CRM & Power Platform Expert: Specializing in Customer Engagement (CE) & Power Apps solutions ✅ Business-Focused Approach: Aligning CRM strategies with your goals ✅ Scalable & Future-Ready Solutions: Ensuring long-term efficiency and automation ✅ Proven Track Record: Successfully delivered CRM projects across multiple industries 📩 Let’s Build a Smarter CRM Together! If you're looking for a Microsoft Dynamics 365 & Power Platform expert to help you automate, optimize, and scale your CRM, let's connect! 💬 Send me a message today, and let’s discuss how I can help you transform your business with Dynamics 365!

I build the backend systems that SaaS companies depend on — and I've been doing it for 8+ years across companies like Avast, Wewell, and TrueClicks. Right now I'm the senior engineer maintaining a SaaS platform that automates Google Ads and Microsoft Ads campaigns for hundreds of clients. Before that I was the sole backend engineer at a startup where I designed the entire architecture from scratch — API layer, database, auth, deployment — supporting mobile and web clients simultaneously. What I actually do for clients on Upwork: → Build or extend .NET / C# backends (Web APIs, background services, microservices) → Integrate third-party APIs — payment providers, ad platforms, AI services, anything with a REST endpoint → Set up or fix Azure infrastructure (App Services, Functions, Key Vault, SQL, DevOps pipelines) → Add AI capabilities to existing products (LLM integration, document processing, automation workflows) → Diagnose and fix production issues — performance bottlenecks, architectural debt, broken integrations I'm Microsoft-certified in C# (Exam 70-483) and have shipped code that runs in production at Avast, a company serving millions of users. I take on a small number of projects at a time so I can give each one full attention. I communicate clearly, deliver on time, and write code your team can actually maintain after I'm done.

Experienced CIO/IT Manager with a demonstrated history of working in the IT and services industry. Project and Stakeholder management, directing teams to success, IT assessments and improvement. Skilled in Active Directory, Windows Server, HTML/CSS, Office 365/Azure, Various market leading ITSM tools (Cherwell, ServiceNow), Passionate about quality service, implementing IT that provides real benefit and strong communication.

✅SAP Business One specialist with 18+ years of experience in development, customization, and technical consulting — including 7 years as Development Team Lead at a SAP Gold Partner in the U.S. (Seidor North America). I work across the full SAP B1 technical stack, from Add-On development and SDK integrations to advanced Boyum B1UP configurations and version upgrades. My clients are typically SAP partners, consultancies, and mid-size companies in manufacturing, distribution, retail, and eCommerce. ──────────────────────────────────────── 🔧 WHAT I DO ──────────────────────────────────────── ✔ Add-On & application development — SAP B1 SDK (DI API & UI API), C#, VB.NET ✔ Boyum B1UP customizations — Universal Functions, validations, dashboards, Print & Delivery, Mass Delivery, item placements. ✔ Crystal Reports design, optimization & troubleshooting ✔ PLD layout design and customization ✔ SAP B1 queries, formatted searches & stored procedures (SQL + HANA SQL) ✔ Third-party integrations — Shopify, Magento, FedEx, UPS, DHL, USPS, ShipHawk, NiceLabel, EDI, ACH, POS systems ✔ Service Layer & RESTful API integrations ✔ System maintenance, troubleshooting & performance optimization ──────────────────────────────────────── 🏭 INDUSTRIES ──────────────────────────────────────── Manufacturing · Distribution & Logistics · Retail · eCommerce · Multi-industry ──────────────────────────────────────── 🌎 AVAILABILITY & ENGAGEMENT ──────────────────────────────────────── ✔ Available for remote work worldwide ✔ English (C1): Professional Working Proficiency. Comfortable with U.S., European, and LATAM clients ✔ Open to hourly contracts, fixed-price projects, and ongoing support retainers ✔ Flexible hours If you're looking for a reliable, senior-level SAP B1 specialist who can hit the ground running. Let's talk.