The VP of Engineering looked exhausted and checked his phone four times during our 30-minute chat. When I asked the founder how they handle roadmap prioritization, he laughed and said, "We just build whatever I think of in the shower." The recruiter emailed me at 11:30 PM on a Sunday to schedule the final round.
I ignored the signals because the equity package was shiny. I took the job. It was the worst nine months of my professional life. I learned the hard way that during an interview, startups will accidentally show you exactly who they are. You just have to know what to look for.
The "Family" trap
If an interviewer repeatedly refers to the company as a "family," run. This is the most common and most dangerous red flag in the startup world.
A company is not a family. A company is a professional sports team. You are there to perform a role, get paid, and help the team win. When leadership calls the company a family, it is almost always a manipulation tactic used to blur professional boundaries. It means they will expect you to work weekends without complaint, accept below-market pay, and feel guilty if you ever try to set a healthy boundary. Families don't lay you off when runway gets tight; startups do.
The turnover question
You should always ask why the role is open. If it's a new role due to growth, great. If it's a backfill, you need to ask what happened to the previous person.
If the hiring manager gets defensive, gives a vague answer about "culture fit," or blames the previous employee entirely ("they just couldn't handle the pace"), that is a massive red flag. Good managers take accountability for bad hires. Toxic managers blame the departed employee. If they throw their last engineer under the bus in an interview with a stranger, imagine what they will say about you.
The scheduling chaos
Startups are inherently messy, and a rescheduled interview isn't the end of the world. But pay attention to how they handle the chaos.
Did the interviewer show up 15 minutes late without apologizing? Did they clearly not read your resume before jumping on the Zoom call? Did the recruiter ghost you for a week and then demand you complete a take-home assignment within 24 hours?
The interview process is the company on its absolute best behavior. This is them trying to impress you. If their best behavior involves disrespecting your time and treating you like an inconvenience, it will only get worse once you are on the payroll.
The "Wearing many hats" excuse
In early-stage startups, everyone wears multiple hats. The backend engineer might have to write some CSS; the PM might have to do some customer support. That is normal.
The red flag is when "wearing many hats" is used as an excuse for having zero process, zero onboarding, and zero role clarity. If you ask, "What are the success metrics for this role in the first 90 days?" and the answer is, "Well, we're a startup, so you'll just be jumping in wherever there's a fire," that is a warning. It means they don't actually know what they need you to do; they are just drowning and hoping you are a life raft.
Trust your gut
When you are desperate for a job, it is incredibly easy to rationalize away bad behavior. You tell yourself that the late-night emails just show "passion," or that the rude interviewer just had a "bad day."
Don't do it. A toxic startup can destroy your confidence, burn you out, and stall your career. Ask hard questions. Watch how they treat you. If the vibes feel off during the interview, trust your gut. The equity is rarely worth the therapy.
