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Alex T.
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Alex T.

AI Engineer | AI Agents, Full-Stack Web & Mobile Apps | Claude, MCP

Your AI agent or app has to work for real users, not only in a demo. I build AI agents and the full-stack web and mobile apps around them, and I take them to production: architecture, code, tests, deployment and support after launch. RESULTS FOR CLIENTS (2026) • A home-care company in Germany runs field visits, invoices and payroll from one offline-first iOS/Android app (Alltagspilot) with an admin web app, DATEV export and two-way Zoho CRM sync. Live on Google Play. I am the main engineer: ~2,000 commits. • A creative agency in Oslo lets its franchises create, approve and publish Meta ads from brand templates on their own (Svipp). I built the multi-tenant campaign flow and the HTML-to-video render service. • An AWS partner in Greece hired me for 4 contracts. A national retail chain now imports supplier invoices into its ERP with GenAI extraction on Amazon Bedrock, and checks stop invented tax IDs and totals. A fashion importer turns supplier files into ERP imports and feeds many eShops from one ERP. The partner also got a full code and security audit of its cloud platform. • Visitors of an island travel guide ask in Greek or English and get answers from the guide's own content, with map routes and sponsored places (Andros AI, a travel assistant with AI-native search). Earlier: Co-Founder & CTO of BookWatch (250K+ users) · Linus, an AI scene partner iOS app I built alone (5.0★ on the App Store) · Audience Plus, Meta Ads audiences from Shopify data for 100+ brands. WHY CLIENTS HIRE ME AGAIN • I build with Claude Code every day, and I review and own everything that ships. • We start with a paid pilot or a first milestone, so you see working software before a large commitment. • After each release you get a short written update that a non-engineer can follow. • AI with controls: validation, evals, tracing, and human approval where a mistake costs money. • Tests, CI and error monitoring from day one. Documentation at handover. You own all code and accounts. • If AI is not the right tool for part of your problem, I tell you. "Reliable, hard-working, dependable, knowledgeable partner" (AWS partner, 4 contracts) "Quick thinker, understands and executes … a good communicator" (AI search MVP client) STACK AI agents and LLMs: Claude, Claude Code, MCP servers, OpenAI, Gemini, Amazon Bedrock, Vercel AI SDK, RAG with pgvector. Full-stack web: Next.js, React, TypeScript, Node.js, Python. Mobile apps: React Native / Expo, Swift / SwiftUI, Flutter. Data and cloud: PostgreSQL, AWS, Vercel. Send me a message with your project and the problem it must solve. I reply with questions and a first plan, and we can book a free 15-minute call.

🇬🇷Athens, Greece$50/hr100% JSS4.63 (27)Since Jun 2019
GlobeUpwork

Earnings and projects

MRR
$8.3k

Last 6 months ÷ 6

World#1,938 / 412k
🇬🇷Country#2 / 1,051
Revenue, last 30 days
$5.5k

Last 6 months: $50k

World#4,740 / 412k
🇬🇷Country#10 / 1,051
Total earnings
$113k

Billed in all: $118k

World#34,074 / 412k
🇬🇷Country#87 / 1,051
Per project
$1.8k

$8.3k in the last 6 months

World#82,720 / 412k
🇬🇷Country#204 / 1,051
Projects, last 6 months
6
50% fixed50% hourly
World#34,405 / 412k
🇬🇷Country#76 / 1,051
Projects in all
62

Across 78 contracts

53% fixed47% hourly
World#48,997 / 412k
🇬🇷Country#122 / 1,051

Earnings, last 30 days

$118k+$5.5k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$110k$115k$120kOct 8Oct 23Nov 7

Skill rankings: Top 0.93% in React

Top 1% in 2 of 20 skills, ranked by MRR among everyone on Upwork with the skill.

  1. #16Claude Code818 freelancers · 🇬🇷 #1Top 2%
  2. #57Large Language Model2,726 freelancers · 🇬🇷 #1Top 2%
  3. #64Retrieval Augmented Generation3,618 freelancers · 🇬🇷 #1Top 2%
  4. #67SaaS Development5,201 freelancers · 🇬🇷 #1Top 1%
  5. #79API Development6,848 freelancers · 🇬🇷 #1Top 1%
  6. #80Generative AI5,038 freelancers · 🇬🇷 #1Top 2%
  7. #87Claude5,112 freelancers · 🇬🇷 #1Top 2%
  8. #89AI App Development4,708 freelancers · 🇬🇷 #1Top 2%