Technical Interview Preparation: A 6-Week Plan
A concrete 6-week prep plan for technical interviews covering coding, system design, and behavioral rounds.
Definition
Technical interview preparation is the structured study process software engineers use to pass a coding loop: pattern-based algorithm practice, system design study, and behavioral rehearsal. A typical plan runs 6 to 12 weeks and pairs daily algorithm reps with 1 to 2 weekly system design sessions. The practice unit for the algorithm side is the LeetCode patterns taxonomy; the practice unit for the design side is the system design basics framework.
Why It Matters in Interviews
Engineers who follow a written prep plan pass technical loops at materially higher rates than those who grind unstructured problems, according to outcome data shared by careers teams at Big Tech employers and reflected in the U.S. Bureau of Labor Statistics hiring guides. The loop is too broad to wing: 1 hour of design plus 30 minutes of coding daily for 6 weeks beats 4 hours of LeetCode the night before.
How to Use It
Weeks 1 to 2: 15 problems across arrays, strings, hash maps. Weeks 3 to 4: trees, graphs, dynamic programming basics; start one system design per week. Week 5: full mock loops, 4 sessions per week, including behavioral. Week 6: company-specific patterns, taper coding to 2 problems per day, sleep prioritized. Track time per problem and force a "look at hint" rule after 25 minutes; grinding past that trains frustration, not skill.
Example
Sample week 4 day: 7am — 1 medium graph problem (35 min). Lunch — review Grokking the System Design chapter on caching (40 min). Evening — 1 mock behavioral focused on conflict (45 min including review). Total: ~2 hours, sustainable for 6 weeks.
Quick Tips
- Solve fewer problems with deeper write-ups; 80 well-reviewed problems beats 300 grinded ones.
- Explain your code out loud while solving; communication is half of the score.
- Schedule 4 mock loops in the final 2 weeks; nothing else replicates the live pressure.
- Sleep 8 hours the night before; tired engineers fail easy problems they would normally crush.
FAQ
How long do I really need?
6 weeks if you code daily already; 10 to 12 weeks if you have not interviewed in 2+ years or are switching languages.
Which language should I use?
The one you write fastest in. Python is the most common for its terseness; Java and C++ are equally accepted at every major tech company.
Do I need to memorize patterns?
No. Recognize them. Memorization breaks the moment a problem twists; recognition holds.