The Senior Signal
BEHAVIORAL › Soft Skills
What separates senior from mid-level: ownership, trade-offs, migrations, performance, and production maturity.
Senior loops test judgment, not syntax: can you own an architecture decision, articulate trade-offs, lead a risky migration, and reason about production health. Interviewers probe how you weigh options, justify choices with constraints, and de-risk change. Strong answers cite concrete signals (crash-free rate, rollout stage, p95 latency) and show you can mentor and align a team, not just write code.
What this covers
- Articulating architecture trade-offs out loud and tying choices to constraints, not dogma
- Leading incremental migrations (XML to Compose, Java to Kotlin, RxJava to coroutines) without freezing feature work
- Performance intuition: jank, startup, memory, and where to measure before optimizing
- Module boundaries, dependency direction, and build-speed implications
- Production awareness: crash-free rates, staged rollouts, feature flags, monitoring, and rollback
- Mentoring, code review culture, and driving team-level decisions