Hire the Best Python Numpy Developers
in Greece

🚀 AI-Driven Algorithmic Trader & Quant Developer | LLM & Agentic Systems I am a Computer Science Engineer (AUEB) and Quantitative Developer with 6+ years of experience bridging the gap between traditional algorithmic execution and cutting-edge Generative AI. I specialize in building "Human-in-the-loop" and fully autonomous trading systems that leverage Large Language Models (LLMs) to identify alpha that traditional indicators miss. 🛠 Tech Stack & Ecosystems -AI & LLMs: OpenAI API, LangChain, n8n for Agentic Workflows, Sentiment Analysis (NLP). -Trading Platforms: NinjaTrader 8 (NinjaScript), TradingView (PineScript), MT4/MT5 (MQL4/5). -Execution & APIs: Interactive Brokers (IBKR API), Python (Pandas, NumPy, Scikit-learn). -Infrastructure: Cloud-based bot deployment (AWS/GCP), Docker, and custom C#/.NET integrations. 🌟 2026 Core Competencies -LLM-Powered Strategy Generation: Building agents that analyze real-time news, Fed minutes, and social sentiment to adjust strategy bias dynamically. -Autonomous Trading Bots: Developing end-to-end Python and C# bots with advanced risk-management modules and LLM-driven "circuit breakers." -Hybrid Backtesting: Conducting rigorous walk-forward analysis and stress-testing using both historical data and AI-generated market scenarios. -Indicator & Script Optimization: Migrating and optimizing legacy PineScript or MQL strategies into high-performance, AI-augmented systems. -Agentic Workflows: Using n8n and LangGraph to create multi-step trading assistants that handle everything from data scraping to execution alerts.

Look, if you're doing the same task more than twice a day, I can probably automate it. I'm a Python automation specialist who builds custom scripts and API integrations that eliminate boring, repetitive work. The kind of stuff that eats up hours but nobody actually enjoys doing. WHAT I ACTUALLY DO: I turn manual processes into automated workflows. Whether it's scraping data from websites, connecting your tools through API integration, processing thousands of spreadsheets, or building custom automation scripts - I make computers do the tedious work so you don't have to. MY TOOLKIT: Python (my main weapon) | JavaScript & Node.js | REST APIs & GraphQL | Web scraping (Beautiful Soup, Selenium, Scrapy) | Data processing (Pandas, NumPy) | AWS Lambda for serverless automation | Google Apps Script | Zapier/Make alternatives when you need custom logic REAL EXAMPLES: - Automated a data collection process that was taking someone 3 hours daily - now runs in 5 minutes - Built API integration connecting Shopify, Google Sheets, and a custom CRM (no more manual data entry) - Created web scraping tool monitoring competitor prices across 50+ sites, updating every 2 hours - Developed email automation system that personalizes and sends 500+ emails based on spreadsheet triggers - Set up automated reporting pulling data from 4 different APIs into formatted Excel reports THE APPROACH: I don't just write scripts and disappear. I build automation that's maintainable, documented, and actually works long-term. You'll get clean code, clear instructions, and I'll explain everything in plain English (no tech jargon unless you want it). BEST FOR: → Data extraction and web scraping projects → Connecting systems through API integration → Workflow automation (file processing, email, scheduling) → Excel/CSV data processing and transformation → Browser automation and testing scripts → Custom Python tools for repetitive tasks I work fast, communicate clearly, and honestly enjoy solving these kinds of problems. Most small automation scripts? I can turn those around same-day or next-day. If you're spending time on something a computer should be doing, let's talk. I'll tell you straight up if automation makes sense for your situation or not.

Clinics lose 15-30% of revenue to missed calls and no-shows, and every one of those patients is booking with the clinic next door instead. I fix this with full systems built specifically for clinics: A voice agent that answers calls 24/7, books appointments, answers patient questions, and sends personalized confirmations to cut no-shows. A WhatsApp bot also running 24/7 so any patient can ask about appointments and book whenever they want. Plus reactivation campaigns running on autopilot, no one on your team has to lift a finger. What clinics see after setup: - 23% more bookings - 31% fewer no-shows - 11 hours saved per week - 14% lift from reactivation campaigns - 100% recovery of missed calls The agent connects to your core clinic systems (if they support an API). I have hands-on experience with all the major clinic platforms, and I build custom systems for each clinic. No two clinics are the same. I built clinly completely on my own and I'm the one designing the systems for every clinic on it. Stack I work with: Voice AI: Vapi, Retell AI, Bland AI, Synthflow, VoiceFlow, ElevenLabs, Deepgram, Cartesia, PlayHT, Azure Speech Telephony & SMS: Telnyx, Twilio Automation & Workflows: n8n, Make, Zapier CRM & Patient Management: GHL, HubSpot, Pipedrive, Salesforce, Zoho CRM, Airtable, Notion Calendars & Scheduling: Google Calendar, Microsoft Outlook Calendar Want to see your clinic answering every call without anyone touching the phone? Let's talk.

My name is Vasileios Papapostolou, a 24 years old Computer science grad who is currently pursuing a Master's Degree in "AI and Big data". I enjoy coding, and I have started my journey working as a full time software engineer in a startup. The purpose of freelancing is to gain knowledge and experience. I would like also to help people to give flesh and bones to their ideas. I am more into the engineering part rather than the AI. I have an in depth understanding of ML, DL, and Stats models. I really love graph theory, optimizations, complexity and in general discrete mathematics. Lastly I have to admit my biggest love is Elixir. It's a fully dynamic programming language for building scalable and fully distributed applications. Beyond the powerful Erlang VM I enjoy the syntax, the pattern matching, the macros and a lot more stuff. If you are interested for a more in depth conversation don't hesitate to ping me. My tech stack is the following: Elixir ( main language) Python, Java (good) Frameworks: Phoenix, FastAPI, Flask Kafka, Grafana, Redis, AI stuf: Machine Learning (Scikit) Deep Learning (Keras, Pytorch) Data Analysis( Pandas, Numpy, Seaborn, Matplotlib)

Full Stack Developer | Automation & Web Scraping Specialist ⚙️ Key Tech Stack: ⚛️ Frontend: React.js, Next.js, Vue.js, Tailwind CSS, TypeScript, Redux 🖥️ Backend: Python (Django, Flask, FastAPI), Node.js (Express), PHP (Laravel, Symfony) 🌐 APIs: RESTful APIs, GraphQL (Apollo) 🕷️ Web Scraping: Puppeteer, Playwright, Selenium, Apify SDK, BeautifulSoup, Scrapy 🤖 AI Tools: OpenAI API (GPT, Whisper), LangChain, Pinecone, FAISS 🗄️ Databases: PostgreSQL, MongoDB, MySQL, Redis ☁️ Cloud & DevOps: AWS, Vercel, Docker, GitHub Actions, Heroku 📊 Data Tools: Pandas, NumPy, Google Sheets API, Excel Automation 🔐 Auth & Security: JWT, OAuth2, Passport.js 🧷 Version Control: Git, GitHub, GitLab As a skilled JS/Python developer, I specialize in creating robust automation tools and innovative web scraping solutions. Whether it’s bot automation, web scraping, API integrations, or social media data collection, I can streamline processes and deliver efficient results. With over 5 years of experience in AI, including prompt engineering and API implementation, I bring expertise in harnessing advanced technologies to solve complex problems. Currently, I serve as the Data Acquisition Specialist in a business focused on hotel price scraping, while also managing my own software business. I’m excited to collaborate and grow together. Let’s bring your ideas to life! Regards!