Practise the interview before it happens.
Get a prep trail built around your experience and the role you want, with practice, interviews, and feedback that take you from your first question to the final round.
A short silent film. Headlines say: your next interview, practised before it happens, built from your resume. Teachers Maya, Daniel, Olivia, Ryan, and Claire each appear with a line about how they teach, then: pick the teacher you learn best with. A follow-up question asks what happens to sign-in when Redis drops at peak. An answer is typed out, a score of 8 out of 10 appears with the note: now show how you measured it. Then DSA, system design, behavioural, and Resume Roast flash by, ending on: walk in ready.
Practise, prove it, then interview.
Every question you answer here makes the next one easier, until the real interview feels like a conversation you’ve already had.
A short silent film of product cards on a white background. Practice: a Sliding window block of five questions gets ticked off, and Daniel gives a hint: shrink only when the window breaks the rule. Block round: Claire assesses the block, 8 questions with 6 correct, a score of 7 out of 10, passed and the next block unlocked. Interview: Daniel asks why Kafka rather than a job queue, you answer, and he follows up asking which reason actually made the decision. After every round, one thing to fix: a report scores 8 out of 10 and says lead with the trade-off, then the numbers. It ends on: Walk in ready. trailgrad.com.
James
Reading your resume like a recruiter
Target fit
52/100
Improved performance of the checkout service.
“Improved performance” is wearing a fake moustache.
Try instead
Cut checkout p95 from 900 ms to 240 ms by batching queries.
Your resume, read the way a recruiter reads it.
Resume Roast tells you what lands, what makes them guess, and how to rewrite every line for the role you want. Honest, a little funny, and always useful.
Watch yourself get sharper.
Every round adds to the picture: where you started, what you’ve fixed, and how close you are to ready.
Round scores
System design, last 6 weeks
Interview ready
0%
One round, from resume to report.
See how a single round reads your work, asks the follow-up, and leaves you with one thing to fix.
A short silent film. Upload once. It reads what you built: a resume line about moving order events onto Kafka is highlighted. Then it asks why Kafka and not a simple queue. Stuck? Ask for a hint: think about what happens when a consumer falls behind. Then drill the gaps: two pointers, rate limiter, idempotent APIs, cache invalidation. After every round, one thing to fix: lead with the trade-off, then the numbers. A little sharper every round.
You’re never stuck for long.
Start with a hint from your teacher. Still stuck? A Trailmate who has already solved it steps in. Help from other learners is always free.
Sliding window
Help
Questions, answered.
Something else on your mind? Write to hello@trailgrad.com.
Is Trailgrad free?
Yes. Practice and help from other learners are free and will stay free. Voice interviews are free too, with a daily limit.
Which roles does it cover?
Technical roles across software engineering. Your practice tracks and interview rounds follow the role you choose when you sign up.
Why does it need my resume?
Your interviewer asks about the projects, roles, and skills on it, the way a real interviewer would. You can replace it any time from your profile.
What happens to my resume?
It is read once to pull out your experience, projects, and skills. The details stay in your account; the original file is not stored.
Are my interviews recorded?
Your audio is not recorded. The transcript is kept so your report can quote your answers. Your camera is optional and its view never leaves your device.
Walk in ready.
Get a prep trail built around your experience and the role you want. Free to start.