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Prove what your résumé can't.

Practice to sharpen. Verify to prove. Take a verified technical screen, get a sealed report, and share it with employers — proof that travels with you.

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Consented recordingTamper-evident sealFresh for 90 days

app.fynvic.com/screen · liveLive

Question 03 / 06 · System design24:18

Walk me through how you'd design a rate limiter for a public API.

Your answer · spoken

I'd start with a token bucket per client, refilled at a constant rate. The tricky part is keeping the count consistent when traffic crosses servers

Listening · sub-300ms turn-taking

Why it works

A real conversation. Then proof you can send.

Most practice tools are flashcards with a microphone. Fynvic is a verified technical screen — a conversation that follows you, scored honestly, sealed into a report employers can trust.

01 · Real conversation

The interviewer follows what you actually said.

Not scripted. Not async video. If you hedge, it asks why. If you handwave, it slows you down. Sub-300ms turn-taking — it sounds like a phone call, not a screen reader.

Adaptive follow-up questions
Voice-quality recording + full transcript
Pause-aware turn detection

transcript.txt sealed

Fynvic

How would you handle Redis going down?

You

Uhh, maybe fall back to local rate limits?

Fynvic

You said "maybe." Walk me through what could go wrong with that fallback.

02 · Voice + code

Speak and ship — at the same time.

Real screens test both. So does Fynvic. The interviewer sees the code as you type and asks about it. Reasoning out loud counts. Bailing on a test counts. It all lands in one report.

Browser IDE with live tests
Voice-aware code review
Sessions up to 45 minutes

rate_limiter.py⌘R run

class RateLimiter:

def allow(self, key):

now = time.time()

delta = now - self.last

self.tokens = min(

self.capacity,

self.tokens + delta * self.rate)

if self.tokens >= 1:

return True # consume + admit

03 · Honest evaluation

Not "great answer." A structured rubric.

Per-criterion scoring across technical thinking and communication, every score cited back to a moment in your own transcript. Practice runs stay private to you. Verified runs get sealed into a shareable report.

Per-criterion rubric scoring
Citations back into the transcript
Coaching prompts for next session

report · session_8f3a91 no flags

Backend Engineer · L5

Python / Distributed systems · 38 min session

87th percentile for role

Communication88

Problem solving78

Edge cases & testing61

04 · Verified report

Show proof before the interview.

Complete a consented, recorded screen and earn a sealed report employers can verify. Share it on your résumé, your portfolio, or a single link — tamper-evident, candidate-owned, and marked fresh for 90 days.

Consent-based session recording
One verification link, tamper-evident seal
Verifiable forever · fresh for 90 days

fynvic.com/v/8F2A·D419 verifiable

Fynvic Verified Report

Alex Chen

Backend Engineer · L5 · React / Node / Python

Score

82 / 100

Integrity

No flags

Integrity hash · a7f3…d419Sealed May 26, 2026Fresh for 90 days

How it works

Three steps. One sitting.

From picking a role to sharing your sealed report — designed to feel like a single interview, because that's how the real one feels.

Pick your role.

Choose from rubrics or paste a job description. Questions adapt to your target stack and seniority.

Senior Backend · Systems · L5

Take the screen.

A real voice conversation with adaptive follow-ups and a live coding challenge — recorded with your consent on verified plans.

Live · 24:18 · "Redis outage?"

Share your report.

Get a sealed report with transcript, scoring, and a unique link. Send it to any employer — they verify and decide faster.

82 / 100 · sealed link

Every verified report carries a unique URL and hash, so employers know it came from Fynvic and hasn't been altered.

Pricing

Start practicing. Or prove it for real.

No subscription. Pay only when you need it — your first practice screen is free.

PracticeGet sharper

For engineers who want to get sharper before real interviews. First one's free.

First practice screenFree
1 interview$9
5 interviews$35
Full transcript, replay, and cited feedback after every session

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VerifiedShareable proof

For engineers who want proof they can share with employers.

1 verified screen$79
Consented recording, sealed report
One verification link, verifiable forever
Marked fresh for 90 days for employer screening

Get verified

One verified screen, one price — your report stays verifiable for good.

"Three weeks of practice, then one verified screen. The sealed report got me the interview — the follow-up questions were the part that changed everything."

ACAlex ChenBackend Engineer · L5 · hired at a Series-B

FAQ

Questions, answered.

01Will employers see my practice sessions?

No. Practice screens are private to you — only you ever see the transcript and feedback. A verified report is shareable, but only the people you send the link to can open it. You stay in control of who sees what.

02What is the 90-day freshness window?

Your sealed report stays verifiable forever — the link and hash never stop working. For 90 days after your session it's also marked fresh, signalling to employers that it reflects your current ability. After that it's still genuine, just no longer flagged as recent.

03Does this replace a company's own interview?

No. A Fynvic verified report is supplemental screening evidence that helps an employer decide whether to move you forward — it gives them a clear, inspectable picture of your ability. It doesn't make the hiring decision for them, and there's no facial or emotion scoring involved.

04Can I practice for a specific company?

Paste a job description and we calibrate the question bank to that stack and seniority. We don't impersonate specific companies — we calibrate against the rubric so the practice maps to what you'll actually face.

05What if my mic or internet drops mid-session?

The session pauses automatically and resumes when you reconnect. If the disruption is significant, you can restart for free in the same week — it won't count against your report.