All Roadmaps›🤖 Sr. Android Developer›Phase 11›Month 2: Deep Dive (Days 31-60)

Month 2: Deep Dive (Days 31-60)

📖 Concept

Month 2 goal: Deepen Android architecture and system design skills, practice behavioral questions, and increase DSA difficulty.

Daily schedule (3-4 hours/day):

Morning (2 hours):
  - 1 LeetCode medium/hard problem (45 min)
  - 1 previously solved problem review (15 min)
  - Android deep-dive topic study (60 min)

Evening (1.5 hours):
  - System design practice (45 min, 3x/week)
  - Behavioral story preparation (30 min, 2x/week)
  - Build/extend architecture project (45 min)

Week 5-6: Android Architecture Deep Dive

  • Clean Architecture — implement a full feature with all layers
  • Modularization — split a monolith into modules
  • Hilt dependency injection — advanced scoping, qualifiers
  • Offline-first with Room — sync engine, conflict resolution
  • Performance profiling — memory, CPU, rendering

Week 7-8: System Design + Behavioral

  • Practice 1 system design problem per session (3x/week)
  • Write 8 STAR stories covering all behavioral categories
  • Practice speaking answers aloud (record and review)
  • Study Android-specific system design patterns
  • Review production-grade architecture at scale

Android topics for Month 2:

  • Jetpack Compose deep dive — recomposition, performance
  • WorkManager — complex chains, constraints, retry
  • Navigation architecture — multi-module, deep links
  • Security — OAuth, encryption, certificate pinning
  • Testing — unit tests, UI tests, fakes vs mocks

Milestone checkpoint (Day 60): □ Solved 60+ LeetCode problems total (40 medium, 15 hard) □ Completed 4 system design practice sessions □ Written 8 STAR stories □ Built a multi-module app with MVVM + offline-first + Hilt □ Can explain Android component lifecycle at framework level

💻 Code Example

codeTap to expand ⛶
1// Month 2 study plan visualization
2

3/*
4WEEK 5: Architecture + Hard Problems
5━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
6Mon: Clean Architecture implementation + LeetCode Hard
7Tue: Modularization practice + LeetCode Medium
8Wed: System Design: Design Google Keep
9Thu: Hilt advanced patterns + LeetCode Medium
10Fri: Behavioral prep (2 stories) + LeetCode Medium
11Sat: Architecture project work + review week's problems
12Sun: Rest / light review
13

14WEEK 6: Performance + Mixed Practice
15━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
16Mon: Memory profiling + LeetCode Hard
17Tue: Rendering optimization + LeetCode Medium
18Wed: System Design: Design Instagram Feed
19Thu: Battery optimization + LeetCode Medium
20Fri: Behavioral prep (2 stories) + LeetCode Medium
21Sat: Extended project + Perfetto profiling
22Sun: Rest / light review
23

24TRACKING TEMPLATE:
25━━━━━━━━━━━━━━━━━
26System Designs Completed:
27  ☐ Google Keep (offline-first notes)
28  ☐ Instagram Feed (real-time, pagination)
29  ☐ WhatsApp (messaging, E2E encryption)
30  ☐ Uber (location, real-time matching)
31  
32Behavioral Stories Ready:
33  ☐ Technical leadership initiative
34  ☐ Conflict resolution with peer
35  ☐ Failure + learning story
36  ☐ Mentoring / growing others
37  ☐ Decision with incomplete info
38  ☐ Process improvement
39  ☐ Pushing back on stakeholder
40  ☐ Outside comfort zone
41*/

🏋️ Practice Exercise

Month 2 Problem Set (30 more problems):

Week 5 — Advanced Patterns: 31. Word Ladder (Hard) 32. Alien Dictionary (Hard) 33. Edit Distance (Medium) 34. Partition Equal Subset Sum (Medium) 35. Decode Ways (Medium) 36. Regular Expression Matching (Hard) 37. Palindrome Partitioning (Medium)

Week 6 — Graph Algorithms: 38. Clone Graph (Medium) 39. Pacific Atlantic Water Flow (Medium) 40. Redundant Connection (Medium) 41. Graph Valid Tree (Medium) 42. Cheapest Flights Within K Stops (Medium) 43. Network Delay Time (Medium) 44. Reconstruct Itinerary (Hard)

Week 7-8 — Interview Simulation: 45. Word Search II (Hard) 46. Sliding Window Maximum (Hard) 47. Maximum Frequency Stack (Hard) 48. Design Hit Counter (Medium) 49. Design Twitter (Medium) 50. Implement Trie (Medium) 51. Minimum Height Trees (Medium) 52. Shortest Path in Binary Matrix (Medium) 53. Rotting Oranges (Medium) 54. All Paths from Source to Target (Medium) 55-60. Mock interview problems (random selection)

⚠️ Common Mistakes

  • Neglecting system design preparation — it's 50% of the senior interview and harder to cram

  • Not practicing behavioral answers aloud — writing them is different from speaking them fluently

  • Doing only easy problems to feel productive — growth comes from struggling with medium/hard problems

  • Not building projects — theory without practice doesn't demonstrate mastery in architecture discussions

💼 Interview Questions

🎤 Mock Interview

Mock interview is powered by AI for Month 2: Deep Dive (Days 31-60). Login to unlock this feature.

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