Archive
A chronological list of all published posts.
2026
12 posts
11-12
Mobile Tech Lead — from iOS architecture to Harness Engineering for native apps
#Harness Engineering #AI Agents #Mobile #Tech Leadership #App Development
11-12
Harness Engineering for Dual-Native Mobile Development: Beyond AI Coding Assistants
#Harness Engineering #AI Agents #iOS #Android #Swift #Kotlin #Mobile Development #Software Architecture
03-25
Why Document Ranking Matters in RAG. What Mobile Engineers Should Know
#AI for Mobile #RAG #Search #Engineering
03-22
RAG Is Not One Thing. A Practical Architecture Map for Mobile AI Systems
#AI for Mobile #RAG #Architecture #Engineering
03-20
How RAG Actually Works. Building Reliable AI Systems for Mobile Teams
#AI for Mobile #LangChain4j #RAG #Hands-on
03-18
What Mobile Engineers Must Understand About Transformers
#AI for Mobile #Transformers #Deep Learning #Engineering
03-08
Deterministic Token Budgeting. Engineering Predictable AI Output for Mobile Apps
#AI for Mobile #Cost Management #Tokens #Engineering
03-05
Hybrid Search in RAG. Why Alpha Tuning Is an Architectural Decision for Mobile AI
#AI for Mobile #RAG #Search #Architecture
02-28
The Embedding Gap. Why Your Vector Database Fails Before You Query It
#AI for Mobile #RAG #Embeddings #Engineering
02-21
The Token Tax. Why Your AI Strategy is Leaking Cash and How to Fix It
#Leadership #AI #Cost Management #Strategy
02-18
Why Architecture Matters More Than Prompts for Mobile AI
#AI for Mobile #Architecture #Engineering #Evaluation
01-05
Designing Reliable AI Systems for Production Environments
#AI for Mobile #RAG #Reliability #Engineering
2025
6 posts
11-05
Human-in-the-Loop Is Not a Feature, It's a Design Principle for Mobile AI
#AI for Mobile #Human-in-the-Loop #Guardrails #UX
07-18
RAG Is Not a Feature, It's an Architecture Decision for Mobile Teams
#AI for Mobile #RAG #Architecture #Engineering
07-10
AI Roadmap for Tech Leads. A 12-Month Learning Plan to Stay Relevant
#Leadership #AI #Roadmap #Upskilling
06-11
The Unexpected AI Skills I Gained from a PhD in Analytical Chemistry
#Leadership #AI #Academia #Learning
02-12
What I Got Wrong About RAG. Lessons for Mobile Engineers
#AI for Mobile #RAG #Lessons Learned #Engineering
01-06
Why Artificial Intelligence Is the Next Step to Improve My Tech Leadership
#Tech Lead #AI #Upskilling #Mobile #Leadership
2024
12 posts
12-17
Deterministic vs Probabilistic AI. What Mobile Engineers Need to Know
#AI for Mobile #Reliability #Engineering #Architecture
11-05
Why Your RAG Pipeline Will Fail in Production (And How to Prevent It)
#AI for Mobile #RAG #Production #Engineering
10-22
Observability in RAGs. What Mobile Teams Need to Measure Before Shipping
#AI for Mobile #RAG #Observability #Engineering
09-10
The Problem Nobody Is Solving at Scale. Reliable AI for Mobile Teams
#AI for Mobile #RAG #Reliability #Engineering
08-13
How Vector Databases Are Changing Search for Mobile AI
#AI for Mobile #Vector Databases #Search #Engineering
07-25
The Real AI Revolution Isn't Technical, It's Strategic
#Leadership #AI #Strategy #ROI
07-09
RAG Explained. Why Context Is Everything in Mobile AI
#AI for Mobile #RAG #Fundamentals #Engineering
06-18
What Mobile Architecture Taught Me About Building AI Systems
#Mobile #Architecture #AI #iOS #Android #Mobile Patterns #Scalability
05-12
LLMs Are Not Magic. A Mobile Developer's Reality Check
#AI for Mobile #LLMs #Engineering #Expectation Management
04-08
The Hidden Complexity Behind AI-Powered Products. What Mobile Teams Underestimate
#AI for Mobile #Architecture #UX #Systems Thinking
03-14
The Questions I'm Asking Before Writing a Single Line of AI Code
#Leadership #AI #Architecture #Discovery
01-15
Why Software Engineers Should Take AI Seriously Now
#Leadership #AI #Software Engineering #Tech Lead
Raúl Ferrer
Mobile Tech Lead and former iOS architect (author of *iOS Architecture Patterns*, Apress). After studying AI, I now focus on **Harness Engineering**: shared harnesses that enable AI agents to build dual-native mobile apps (SwiftUI + Jetpack Compose) with alignment, quality, and speed. I help mobile product teams multiply their engineering productivity.
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