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Innovative Machine Learning Engineer and Science Educator with a unique dual expertise in developing advanced AI/ML-solutions and translating complex scientific/technological concepts for diverse audiences. With over 20+ years professional experience, of which 8+ years in technology and engineering, I specialize in building custom AI, Machine Learning, and NLP solutions that solve real-world challenges (such as high-accuracy computer vision models (YOLO), optimizing predictive analytics (XGBoost/PyTorch), or leveraging the latest LLMs for automating workflows). In addition to that, I am also an expert in crafting highly accessible course materials about a plethora of topics from science and technology. My technical foundation is rooted in rigorous mathematics and statistics, but my work isn't just theoretical; I have developed my skills in the world’s most competitive environments, including Kaggle, where I’ve mastered the full Python data science stack. Key Competences: - Deep Learning & CV: YOLO, PyTorch, Keras, TensorFlow, XGBoost. - Advanced NLP: LLM prompt engineering (Google/Innodata), BERT, and HuggingFace. - Data Science: Regression, tabular data analysis, and complex time-series prediction. - Course and curriculum development: Science, physics, mathematics, engineering, computer science, cryptography, AI/ML. - Training delivery: Data governance and agentic AI for executives. As a long-term digital nomad, I bring a proven track record of managing complex projects independently and delivering on schedule, regardless of geography.

Recent achievements: * Decreased memory footprint for the backend of a heavy medical app by almost 25%. * Improved accuracy of energy consumption forecasts by more than 30%. * Increased pattern reading speed for a new type of storage medium by more than 150x. Skills: * AI/Machine Learning (10+ years, top international banks / online merchants) * Computer Vision (14+ years, lots of medical imaging, many modalities) * Optimization algorithms, avoiding "combinatorial explosions" * Data analysis, cleansing, transformation (ETL), and processing * Python/Rust/SQL/Matlab/C++/C Education: * PhD in Computer Vision from TU Delft, The Netherlands * MSc in Artificial Intelligence and Graphic Systems from "Politehnica" Univ. of Bucharest, Romania Books I contributed to: * “Handbook of Image and Video Processing”, Academic Press (Elsevier), 2005 * “Coronary Radiology”, Springer, 2008 * “The Essential Guide to Video Processing”, Academic Press (Elsevier), 2009 I'm looking forward to working in challenging projects, especially in the Machine Learning, Computer Vision and Logistics/ERP areas.

🏆 18 Years in Cloud & Enterprise Tech | Currently @ AWS in GenAI Partnerships 🏆 💼 Production AI Systems Built on AWS Bedrock, Claude, n8n, OpenAI, Zapier & GHL💼 ⚡ Working Automation in Week One. Real Results in Week Two. Not a 6-Month Project 🚀 Send me an invite or message, I'll give you a free Loom audit showing exactly how I'd automate your biggest time drain. That's my promise. I help SMBs replace manual, repetitive work with AI agents and automated workflows that actually run in production. Whether you're losing revenue to missed calls, watching senior staff chase documents, or trying to make AI do real work in your business, I build systems that drive output and ROI, not slick demos that fall over in week two. Automation that performs. I build production AI and workflow systems across n8n, Make, Zapier, and AWS serverless. Proper error handling, monitoring, and a focus on the operational metrics that actually move your bottom line response times, no-show rates, conversion, revenue recovered. Architecture that scales. Most "AI automation experts" learned this stuff last year. I've spent 18 years across cloud ecosystems and currently work at AWS in GenAI partnerships. Access to the latest tools Bedrock, Kiro, Quick, Connect, Lex, Glue. Same engineering rigor, applied to WhatsApp bots, lead pipelines, and the glue code holding your stack together. Build it right, build it once. Full-stack automation. Scoping, architecture, build, deployment, handover, each stage needs different thinking. I design systems end-to-end that move work through your business, from inbound lead to qualified meeting, from missed call to recovered revenue. Data-driven delivery. I track throughput, response times, API costs, error rates, and ROI on every automation I ship. You get clear reporting showing what's working, what's not, and what we're doing about it. You own everything built code, workflows, and infrastructure. HAPPY CLIENTS: ⭐⭐⭐⭐⭐ "We were losing 30-40% of inbound leads because no one picked up after hours. Rajiv built a WhatsApp bot on n8n that responds within 90 seconds, qualifies the lead, and books them straight into our calendar. We recovered $14k in revenue in the first month alone. What impressed me most was that he set up monitoring from day one - I get a weekly report showing response times, conversion rates, and any errors. It's been running clean for four months without us touching it." - Operations Director, Allied Group, Australia ⭐⭐⭐⭐⭐ "Our onboarding process was a nightmare - consultants chasing clients for documents over email for weeks. Rajiv scoped the whole thing in one call, built an end-to-end workflow in Make that sends reminders, tracks what's outstanding, and escalates to the right person automatically. He also handed over documentation and trained our team properly. No black box. We cut onboarding time from 18 days to 4. If you want someone who builds it right and then leaves you owning it, hire this guy." - Managing Partner, Meridian Consulting, UK ⭐⭐⭐⭐⭐ "We had a pile of unstructured customer feedback across email, Intercom, and Google reviews that nobody had time to read. Rajiv built a Claude-powered classification and summarisation pipeline on AWS Bedrock and Lambda that processes everything nightly and pushes a digest into Notion. What set him apart was his AWS depth - he architected it to be genuinely cost-efficient at scale, not just a proof of concept. He also flagged three edge cases we hadn't thought of before we even started building. Would absolutely bring him back." - Head of Product, SaaS startup, Canada ⭐⭐⭐⭐⭐ "I'd tried two other automation freelancers before Rajiv. Both built things that broke within weeks and then disappeared. Rajiv rebuilt our entire outbound pipeline - Apollo enrichment, Instantly sequencing, CRM sync, the lot and it's been running without issues for six months. He tracks open rates, reply rates, and bounce rates and flagged a deliverability issue before it tanked our domain. Exactly what he promised." - Founder, Agency USA CORE SKILLS: AI Automation, AI Agents, AI Implementation, AI Agent Development, AI Chatbot, AI Bot, AI Classifier, Artificial Intelligence, Claude, ChatGPT, Gemini, OpenAI API, ChatGPT API, Anthropic, AWS Bedrock, AWS Lambda, API Gateway, EventBridge, S3, Marketing Automation, Business Process Automation, Workflow Automation, CRM Automation, Email Automation, Task Automation, Omnichannel Automation, Lead Management Automation, n8n, Zapier, Make, Python, JavaScript, Node.js, Java, Google Apps Script, JSON, API Integration, Application Integration, WhatsApp Business API, Missed Call Recovery, No-Show Reduction, Lead Response Automation, Document Collection Workflows, Interview Scheduling, Cold Outreach Infrastructure, Lead Generation, Lead Qualification, Apollo, Apify, Instantly, HubSpot, Salesforce, Pipedrive, HighLevel, Notion, Google Sheets, Data Scraping, Dashboard, DevOps, Scripting, Facebook Graph API, Architecture

🤖 Senior AI Consultant & Conversation Designer | Conversational AI Specialist | 7+ years commercial experience | Top Rated Plus | Expert Vetted | MVPs & Production-ready AI Applications Most companies who automate their interactions end up with robotic, frustrating AI that drives users away. I help businesses build advanced AI Solutions that feel close to human, understand context, and drive real business results. With my academic background in Linguistics and AI, I design natural sounding AI Agents that imitate human speech and guide users to your target actions. I have over 7 years of experience advanced building AI Assistants and Voice Agents, offering consultations on chatbot development and conversation design, and also teaching people to build chatbots themselves, giving mentoring sessions and workshops. If your business needs an advanced AI Solution that sounds close to human, let's chat :) ==== #Chatbots #GPT4 #LLMs #Rasa #VoiceFlow #DialogFlow #Landbot #ManyChat # LangChain #OpenAI # RAG #VoiceBots #GenerativeAI #BlantAI #AirAI #Vapi #Prompt Engineering #N8N ==== ✅ What makes me different from other freelancers: ▣ Full-cycle AI chatbot development services: from a business idea to production. ▣ Business-oriented approach: I think about chatbots as a tool to solve a specific problem. I design chatbots with your business goals in mind and the problem you are trying to help your users solve. ▣ User-centric: For any software project, including developing chatbots, it's very important to always keep users in mind. I do user research before the beginning of the project and validate my assumptions as soon as possible on real users. ▣ Multidisciplinary: I am not just a full-stack developer. I have a background in Natural Language Processing and Artificial Intelligence and I understand Machine Learning and the mechanisms behind how chatbots actually work. ▣ A linguist by education: My first education is in Linguistics and I understand how language works. This helps me design conversations that sound natural and are user-friendly. ▣ I value transparent and direct communication. ▣ I value your time and I value my time and I prefer to deliver results quickly rather than doing work for the sake of work. ▣ Based on the reviews, people think I'm a nice person to work with :) ==== ✅ How I can help: ▣ Starting AI Assistant project: With the overwhelming amount of AI technologies available, it’s easy to get lost when trying to build an MVP quickly and cost-effectively to validate your idea. I offer consultations to help you polish your AI strategy and select the right tools, ensuring you build an MVP that’s aligned with your business goals. ▣ Full-cycle Advanced AI Chatbot Development: I offer full-cycle AI Chatbot Development services, from start to finish. For chatbot development I use GPT-4, Rasa, DialogFlow, ManyChat, Landbot and VoiceFlow. For backend I use Python. For frontend I use JavaScript (TypeScript). ▣ Data & conversation design: Creating AI solutions that sound natural is hard, you need to know what constitutes a good conversation in your specific domain. If you're looking to design conversations that feel authentic, I use a data-driven approach to analyse real-world conversations and design playbooks and prompts that help create human-like conversations. ▣ Audit of your existing chatbot: Is your chatbot struggling to deliver performance and you lack in-house expertise to bring it to the next level? I offer a chatbot audit to provide strategy for improvement. I audit conversation design to help rewrite dialogues to feel more natural, review technical implementation to improve AI quality, and analyse conversation logs to identify feature gaps. ▣ AI Workshops & Training sessions: AI is becoming a core part of business, so companies want to grow expertise in-house. If you are looking to train your team, I offer hands-on workshops to help teams design, develop, and optimise chatbots that drive real results. ▣ Chatbot UI: I also offer help with creating custom chatbot widgets for your website. ==== ✅ Tech Stack: ▣ LLMs, advanced RAG & finetuning, prompt engineering ▣ Chatbots: LangChain, VoiceFlow, OpenAI, DialogFlow, Rasa, ManyChat ▣ Voice: Vapi, Bland AI, Air AI, Twilio ▣ Vector Databases: LanceDB, Pinecone, weviate ▣ Generative AI: OpenAI, Antropic, Gemini, LangChain, LiteLLM ▣ Automations: Make, Zapier, n8n, CRM, Replit ▣ Deployment: Docker, AWS ▣ Integrations: web, WhatsApp, Telegram, Messenger, mobile apps ▣ Speech technology: Whisper, Deepgram, Eleven Labs ▣ Programming Languages: Python, JavaScript ==== ✅ Featured projects: ▣ Property Management AI Assistant (LiteLLM, OpenAI, FastAPI) ▣ Voice Agent for Real Estate (Vapi, ElevenLabs, OpenAI) ▣ Language Learning AI Agent (Rasa) ▣ Financial Assistant Chatbot (DialogFlow) For more see my portfolio below.

I architect and deploy production-grade AI systems — from LLM inference infrastructure to multi-agent workflows and RAG pipelines. My work spans the full stack: GPU cluster management, model deployment, agentic system design, and enterprise integration. 💡 Notable Projects mdgpt — Sovereign AI Platform (Mijndomein) Designed and deployed a sovereign LLM inference platform for a Dutch enterprise with 1.4M+ active subscriptions. Multi-provider gateway (vLLM, Anthropic, Gemini), 4×A100 GPU cluster, Kubernetes orchestration, and 130+ production agentic tools across engineering and office teams. Stack: FastAPI, async Python, Redis, Phoenix/OTel, Prometheus, OpenWebUI. Savion Clinic & Patient (LMXAI) Built a two-sided clinical AI platform from scratch — a patient nutrition coaching app and a clinic assistant automating 100% of nutritionist workflows. LangGraph-orchestrated multi-agent architecture, RAG pipelines for clinical knowledge retrieval, MCP tool integration, Django + MongoDB + Redis. LMXAI Benchmark (Context Engineering) Achieved top-5 global ranking in LLM education benchmarks, raising accuracy from 68% → 85% through advanced context engineering, prompt optimization, and agentic reasoning within a custom evaluation framework. 🎯 How I Work I build systems that are modular, observable, and production-ready — not prototypes. Focus is always on reliability, latency, and measurable business impact. 🧰 Core Stack LangGraph · LangChain · FastAPI · Python (async) · RAG · vLLM · SGLang · LoRA/QLoRA · Redis · Elasticsearch · PostgreSQL · MongoDB · Docker · Kubernetes · OpenAI / Claude / Open-Source Models · MCP · Context Engineering · GPU Inference · AWQ/FP8 Quantization

Tracking is broken for most businesses. GA4 doesn’t match ad platforms, Facebook has no CAPI set up, and consent regulations kill half the data. I fix that. I am a Top 1% Upwork expert with 10+ years of experience in GA4, Google Tag Manager, Facebook Conversions API, and server-side tracking. I have completed 320+ projects, including for Neil Patel, publicly traded Argenx and SEB bank, and many more. 🏆 Top 1% Upwork | 320+ Projects | 10+ Years Experience 🏆 Guarantee: if after implementation your tracking is not verifiably correct and usable for decision-making, I will fix it until it is. No handover, no guessing, no half-working setups. Clients usually hire me when: * GA4 numbers do not match Google Ads or Meta * Facebook Conversions API is implemented but deduplication is wrong * Consent Mode v2 breaks conversion tracking * Server-side GTM exists but data quality is poor * Ad algorithms are being trained on low-quality or missing signals * They want future-proof attribution they can actually trust I do not just install tools. I design end-to-end tracking systems that close attribution gaps, survive privacy changes, and scale with the business. Accurate tracking is not just about reporting. It directly impacts ad platform learning. Clean signals train algorithms to find better buyers, faster, and with less wasted spend. CORE EXPERTISE Google Tag Manager (Web & Server-Side) * Full GTM setups, upgrades, and advanced audits * E-commerce data layer design (Shopify, WooCommerce, custom builds) * Server-side GTM via Stape for GA4, Google Ads, Meta CAPI, LinkedIn, TikTok, Pinterest, Microsoft Ads * Hybrid browser + server setups with deduplication * Cross-domain and cross-platform tracking (web, app, CRM) * Consent Mode v2 and CMP integrations (Cookiebot, OneTrust, custom) * Deep debugging using network traffic and Tag Assistant Google Analytics 4 (GA4) * Full GA4 implementations and health checks * Enhanced e-commerce and custom event modeling * Funnel analysis, path exploration, attribution, and segmentation * UA to GA4 migrations with dual tracking * BigQuery linking and custom SQL models (CLTV, cohorts, attribution) * Consent-compliant tracking and data retention controls Advertising Platform Tracking * Google Ads enhanced conversions (browser and server-side) * Meta Pixel and Conversions API v2 (advanced matching, deduplication, offline imports) * LinkedIn, TikTok, Pinterest, and Microsoft Ads integrations * Offline conversion imports from CRM, POS, and call tracking Dashboards and Reporting * Custom Looker Studio dashboards (GA4, ads, CRM, Shopify) * Blended reporting for ROAS, MER, CAC, and LTV * BigQuery pipelines for scalable reporting and cost aggregation * Executive-ready dashboards with automated delivery Platforms and Environments * Shopify (checkout tracking, subscriptions, GA4, GTM, CAPI) * WooCommerce and WordPress * SPA and custom builds (React, Next.js, custom frameworks) Your data should drive decisions, not confusion. If you want clean tracking, reliable attribution, and ad platforms optimizing on real signals, I can help. Feel free to reach out with questions or a quick overview of your setup. Thanks, Stijn