Senior iOS Developer
Swift foundations → concurrency → architecture → interview practice.
A practical engineering library
Engineering Knowledge Handbook
Learn Concepts. Understand Architecture. Build Better Software.
Build a stronger mental model of software engineering through clear concepts, architecture tradeoffs, realistic code, and concise interview practice.
Explore Engineering Domains
Engineering domain
Swift & iOS
Swift, SwiftUI, UIKit, concurrency, and the iOS platform.
251 linked concepts · ~3 hr 5 min reading
Engineering domainMobile Tech Lead
Architecture, technical decisions, team leadership, and mobile delivery.
138 linked concepts · ~2 hr 33 min reading
Engineering domainBackend Engineering
Backend APIs, data systems, and service reliability.
16 linked concepts · ~41 min reading
Engineering domainDistributed Systems
Consistency, resilience, scaling, and system boundaries.
32 linked concepts · ~1 hr 22 min reading
Engineering domainAI Engineering
LLM applications, retrieval, model routing, and evaluation.
31 linked concepts · ~1 hr 18 min reading
Engineering domainAI Orchestration
Agents, tools, delegation, and reliable execution workflows.
39 linked concepts · ~1 hr 18 min reading
Engineering domainToken Optimization
Context design, token budgets, caching, and cost-aware routing.
11 linked concepts · ~20 min reading
Engineering domainAI Security
Prompt injection, tool boundaries, permissions, and governance.
13 linked concepts · ~15 min reading
Engineering domainSystem Design
End-to-end architecture, tradeoffs, and practical case studies.
78 linked concepts · ~2 hr 54 min reading
Engineering domainInterview Preparation
Short answers and question paths organized by role and level.
142 linked concepts · ~2 hr 55 min reading
Engineering domainClaude Certification Preparation
A verified, independent study center for Claude Architect — Foundations.
18 linked concepts · ~1 hr 16 min reading
Learning Paths
Guided routes point back to the same canonical explanations rather than repeating lesson answers.
Mobile Tech Lead
Architecture decisions, delivery, reliability, and team leadership.
Backend for Mobile Engineers
API contracts, data, distributed reliability, and authentication.
AI Engineering
Build LLM-backed features with retrieval, evaluation, and safe routing.
AI Orchestration Specialist
Design tool-using agents with explicit budgets, permissions, and recovery.
Staff / Principal Engineering
Practice cross-team system design, tradeoffs, and technical strategy.
Claude Architect Foundations · 7 days
A focused first pass across the five verified blueprint domains.
Claude Architect Foundations · 14 days
Add retrieval, context budgeting, evaluation, and scenario practice.
Claude Architect Foundations · 30 days
Deeper architecture practice with spaced review and checkpoints.
Practice and assessment
Interview Practice
Short hit points by role and level, then linked concept answers and code exercises.
Certification Preparation
Dated sourced facts and clearly independent practice for Claude Architect Foundations.
Knowledge Recap
Quick lesson recaps and key takeaways, each linked to its full engineering reference.
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