Yetmgeta E.
Senior Fullstack Engineer | .NET, NestJS, FastAPI, React, Next.js
Are you looking for a Top Rated Senior Fullstack Engineer (100% Job Success, 5+ years of experience) who can plug into your codebase on Day 1 with zero learning curve? I specialize in end-to-end development, from database schema design to pixel-perfect frontend details, and boast a proven track record of scaling complex production systems. I own the entire lifecycle of your product, proactively flagging blockers early and delivering transparent, production-ready code on time. Core Technical Skill Set: 🚀 Backend & Architecture: Frameworks: Expert in .NET Framework/Core, NestJS, and FastAPI. Databases & Services: Supabase, PostgreSQL, MongoDB, and microservices architecture. System Programming & APIs: Robust API Integration, building SMS gateways, and OAuth 2.0 credential management. Deep experience with System Programming and enterprise-grade SaaS architecture (including multi-tenant setups and the MCP - Model Context Protocol). 🎨 Frontend & UI/UX Development: Web Technologies: Mastery in React, Next.js, Angular/AngularJS, and JavaScript/TypeScript. Styling: Sass and Material UI. Design Implementation: Expert at translating designs to code using Figma to ensure pixel-perfect, responsive interfaces. 📱 Mobile Development: Cross-Platform: Flutter (including hospitality systems with booking and profile customization) and React Native. Native/Kotlin: Built a parallel AI-powered local language translator using Kotlin (floating widget overlay app). 🤖 AI & Third-Party Integrations: AI Integration: Extensive experience with AI Model Integration (including OpenAI Realtime, AI Tutors with whiteboards, and video integration). Enterprise APIs: Deep integration experience with HubSpot, Shopify, QuickBooks, Google Workspace, BigQuery, IntelliJ, and HeyReach. ⚙️ DevOps & Cloud: Deployment: DevOps and System Deployment expertise. Proficient with Vercel for frontend hosting and Google Cloud Platform for server deployments (including MCP server infrastructure). Professional Experience & Proven Results: Multi-Tenant AI Agent Platform (XGnosis): Architecting comprehensive infrastructures for AI agent automation, including MCP server deployments, credential management, and complex third-party integrations. Enterprise Web Solutions (Mered Technologies): Engineered scalable web applications for European clients leveraging .NET backends and Angular frontends. Open Source Development (Textbee): Developed a comprehensive SMS gateway API for developers. Freelance Highlights: Successfully delivered a complex AI Tutor Web App (OpenAI Realtime + Whiteboard) (715 hours) and handled massive Payments & Third-Party Integrations projects (654 hours). I also provide expert Technical Audits & Code Reviews for Next.js applications, where I identify issues without requiring development. Why Clients Choose Me: Pragmatic Tech Stack: I choose the right tool for your specific business requirements—not just the latest trend. Full-Ownership Mindset: I manage everything from database schema design to frontend details, ensuring nothing falls through the cracks. Clear Communication: You will receive daily/weekly updates, early flagging of potential blockers, and complete transparency on issues. Let's talk about what you're building. Send me a message and let’s map out your solution!
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $3.5k
Billed in all: $7,375$7.4k
$1.2k in the last 6 months
Across 5 contracts
Earnings, last 30 days
Skill rankings: Top 12% in Sass
Ranked by MRR among everyone on Upwork with the skill.
- #17System Programming76 freelancers · 🇪🇹 #1Top 22%🇪🇹#1 of 1
- #28MCP servers99 freelancers · 🇪🇹 #2Top 28%🇪🇹#2 of 3
- #149Vercel586 freelancers · 🇪🇹 #4Top 25%🇪🇹#4 of 13
- #152Sass1,305 freelancers · 🇪🇹 #3Top 12%🇪🇹#3 of 8
- #450AI Model Integration1,618 freelancers · 🇪🇹 #7Top 28%🇪🇹#7 of 21
- #488.NET Framework2,944 freelancers · 🇪🇹 #1Top 17%🇪🇹#1 of 16
- #641NestJS3,757 freelancers · 🇪🇹 #26Top 17%🇪🇹#26 of 194
- #744DevOps4,403 freelancers · 🇪🇹 #9Top 17%🇪🇹#9 of 40