Table of Contents
- The four interview buckets
- Staff Engineer interview lens: what we look for
- 14-day prep structure
- Interview-day checklist
- Reliable resources
- FAQ
- Related guides in this series
If you have your first developer interview coming up, this prep pack gives you a clear 14-day structure based on what engineering interviewers typically evaluate.
The four interview buckets
- Coding fundamentals
- Project storytelling
- API/system design basics
- Behavioral communication
Staff Engineer interview lens: what we look for
From a Staff Engineer perspective, strong junior candidates demonstrate:
- structured problem-solving under uncertainty
- clean communication of assumptions and trade-offs
- ownership mindset with willingness to ask clarifying questions
- quality awareness (tests, failure handling, observability basics)
You don’t need perfect answers; you need clear thinking and coachability.
14-day prep structure
Days 1-4: Core coding and debugging
- Solve 2-3 medium-level problems daily
- Practice talking through thought process
- Review mistakes and rewrite one clean solution
Days 5-7: Portfolio and project deep-dive prep
- Prepare 2 project walk-throughs
- Explain trade-offs and architecture choices
- Practice answering “what would you improve next?”
Days 8-10: API/system basics
- Design one small REST API per day
- Discuss data model, validation, auth, and monitoring
- Explain failure modes and retry strategy
Add one short reliability question in your prep each day:
- What fails first?
- How will I detect it?
- How will I recover safely?
Days 11-14: Behavioral + mock interviews
- Prepare 6-8 STAR stories
- Run at least 2 mock interviews
- Refine concise and structured answers
Interview-day checklist
- Confirm role + interview format
- Review your resume and projects
- Prepare 3 thoughtful questions for interviewer
- Bring one notebook with key examples
Use these high-signal questions:
- “What does success look like for a junior engineer in the first 90 days here?”
- “How does your team review architecture and technical trade-offs?”
- “What quality standards are most important in this codebase?”
Reliable resources
FAQ
How much system design should a junior candidate know?
You only need fundamentals: API boundaries, data modeling basics, error handling, and trade-off reasoning.
Is behavioral prep as important as coding prep?
Yes. Many candidates are technically capable; communication quality often determines final decisions.