Xavier Mareca

🚀 PySpark in the Cloud: 💾 DataFrames · Delta Lake · Databricks 📊 Power BI Export · Semantic Layer via LangChain 🔁 Real-world pipelines, hands-on. 🔗 linkedin.com/in/xavier-mare… #PySpark #BigData #DataEngineering #PowerBI #LangChain #Azure #AI

The USD dominance isn’t just political. It’s a data problem: liquidity, settlement systems, network effects. You don’t disrupt that easily. Any “alternative” needs infrastructure at global scale. #Data #Finance #USD

Building isn’t just about coding — it’s about structure. My 8‑day roadmap: Day 1–2: repo, local run, data & embeddings Day 3: backend + UI deployed Day 4: QA & docs Day 5: pitch + LinkedIn + CV Days 6–8: ETL + BI + portfolio #AI #DataEngineering #FastAPI #Streamlit

Even in tech, culture matters. Today we celebrate Irish heritage and global community. ☘️ Happy St. Patrick’s Day from @xavierdatatech #StPatricksDay #Ireland #TechCommunity #GlobalCulture #Innovation

Australian tech guy. Rescue dog. Terminal cancer. $3K tumor DNA sequencing → ChatGPT + AlphaFold → custom mRNA vaccine → tumor halved. Zero biology background. Three months. Two hours a night. AI didn't save the dog. A human with AI did. #AI #AlphaFold #MedTech #ChatGPT

One cable. One port. Zero room for error. RealMan robotic arm inserting an Ethernet cable inside a server rack. Robotics isn't only about lifting heavy things. It's about doing small, precise tasks reliably. #Robotics #AI #DataCentre #Automation

Finland. Aalto University. AaltoQ20. 20-qubit quantum computer. Built for students. Not cloud access. The real machine. Full access down to microwave pulses. Most universities rent IBM or Google. Aalto owns the hardware. #QuantumComputing #Aalto #Finland #Tech

Unitree humanoid robots. Temple of Heaven. Beijing. Synchronized martial arts. Coordinated punches, kicks, gestures. Multiple robots. Perfect timing. China isn't just building robots. It's choreographing them. The showcase is the message. 🤖 #Robotics #Humanoid #AI #China #Tech

ETH Zurich. Magnetic microrobots that deliver drugs inside the body. Guided through blood vessels via electromagnetic fields. Tracked in real time via X-ray. Drug released in 40 seconds. FDA-approved materials. Tested in animals. #ETHZurich #Robotics #MedTech #AI #Science

Data centres made of brain cells. Cortical Labs. Melbourne + Singapore. Neuron chips that learned to play Doom in a week. 120 CL1 units. Then 1,000. Silicon is hitting its limits. Evolution might be the next architecture. #AI #BioComputing #Tech #DataCentres

Oracle. Q3 FY2025. Revenue +18%. EPS +22%. Stock +8%. 2027 target: $90B. One driver: AI cloud demand. Same Oracle financing the Paramount-WBD $111B merger. AI is rewriting every balance sheet. #Oracle #Cloud #AI #Tech

Asian nations rely more on energy imports from the Strait of Hormuz than Europe, the US, or Oceania.

Meta allows WhatsApp accounts for kids from age 10. Previous limit 13. Restricted: no status, no communities. Parents control: who chats, which groups, all privacy settings. Same week they knew about 500K daily inappropriate contacts and did nothing #Meta #WhatsApp #BigTech #Tech

Germany. Innovation. 2026. Top innovators: 25% → 13%. Halved since 2019. Low innovators: nearly 40%. Growing. Automotive. Chemicals. Machinery. All losing ground IT and services: the only bright spot. VW -44% profits Germany is losing its edge #Germany #Innovation #Tech #Economy

Meta. Snap. TikTok. They knew. They had the solutions. They chose profit. Project Daisy: hidden likes → better wellbeing, less revenue → cancelled. Snap streak removal → monetized instead: $47M. Night mode → never implemented. #BigTech #SocialMedia #Tech #AI

The best AI experts aren't computer scientists. Astrophysicists. Epidemiologists. Doctors. Historians. They had the problem first. Code was just the tool. The AI revolution happens where the hardest questions are. #AI #DataScience #Tech

Ursula von der Leyen. 2011: accelerate nuclear exit. 2026: nuclear exit was "a strategic mistake." Same person. 15 years apart. Last German reactor: April 15, 2023. France: Flamanville online December 2024. Poland: new plant, $40B+. #Europe #Nuclear. #Energy #EU

Nvidia. NemoClaw. Open-source AI agent platform for enterprises. Partners in talks: Salesforce, Cisco, Google, Adobe, CrowdStrike. Works on ANY hardware — not just Nvidia chips. The chip king wants to own the software layer too. #Nvidia #AIAgents #GTC2026 #AI

HBR on AI at work. 5 principles companies get wrong. Redesign work — don't just add AI oversight Set workload expectations clearly Measure impact, not AI usage volume Build problem-framing skills Protect human attention More AI ≠ better results. #AI #FutureOfWork #GenAI

Volkswagen. 2025. Net profit: €12.4B → €6.9B. -44%. Operating profit: halved to €8.9B. Dividend: -17%. Margin: 2.8%. Target 2026: 4-5.5%. China weakness. US tariffs. EV transition. The biggest carmaker in Europe is fighting for its life. #Volkswagen #VW #Auto #Economy

AWS. 13 hours of outage. Cause: an AI agent making autonomous changes. The cloud that runs the internet — taken down by the technology it's selling. Autonomy without guardrails isn't innovation. It's a 13-hour lesson. #AWS #AIAgents #CloudComputing #AI