What happens
Hundreds of applications. A form-letter no. A practice score that never says which domain is weak.
Know exactly how ready you are.
Pick the job, role, certification or System Design practice you are aiming at. See what you have proven, what is missing and the next step, at every check.
Free plan with limits · no card · your path ready in ~3 min
I am aiming at
Sound familiar
I applied to hundreds of jobs and only got form-letter rejections.
Senior Backend Engineer · Remote (US)
Required skills, one verdict each
- Distributed systems designscored 78, floor 70Proven
- PostgreSQL at scalescored 81, floor 70Proven
- Kafka or similaron your CV, not measuredDeclared only
- Kubernetesnot on your CV, not measuredUnknown
- Go or Javascored 74, floor 70Proven
Verdict
Almost ready · 3 of 5 required skills proven
Next step: measure Kafka, about 5 minutes.
After you sign up, you paste the posting text and get this table for it.
Dramatized scenes, not testimonials. Sample data is made up.
You are putting in the hours. Nobody tells you if they count.
Applications, practice exams, lessons, side projects. The effort is real. The feedback is not.
What it feels like
"Am I good enough, or am I just studying the wrong thing?"
What should be true
Effort should leave a trace. You should see what you know, and what is next.
Dramatized scenes, not testimonials.
We turn a target into a map you can follow.
You choose where you want to get. We measure where you stand, show what separates you from it, and give you the next step. Every verdict shows its evidence.
We do not promise a job or a pass. We promise preparation and proof. We are not a coding or behavioral interview trainer.
- 134roles, up to four levels each
- 71certification practice exams
- 4verdicts, each with its evidence
Three steps. One short measurement to your first answer.
Choose your target
A job posting, a role and level, a certification, System Design or AI skills.
See where you stand
A short measurement. Each requirement shows as proven, declared only, unknown or a gap.
Follow the next step
Steps in order, built from what is missing. Retest and keep proof you can share.
Look inside before you sign up.
This is the catalog you would prepare with, in plain words.
Backend Engineer
Owns a service or feature end to end, including its API contract, data access, security model and operational signals.
You now design features rather than only implement them: you choose the API shape, tune the slow query, and decide what goes async. You are paged for your own service and expected to leave it observable. Compared with junior, the questions you answer are no longer handed to you.
REST API Design
You make design calls such as idempotent retries on payments or PUT versus PATCH, so integrators can retry safely after a timeout without creating duplicates.
API Versioning & Documentation
You can tell a breaking change from a safe one and publish an OpenAPI spec, so shipping a field rename does not silently break a partner's integration.
Relational Database Design
You decide when to normalize and when to denormalize, and which indexes a new feature needs, so the table stays workable once it grows past a million rows.
SQL Query Optimization
You read an execution plan to find why a report query takes seconds and fix it with the right index or rewrite, instead of adding hardware or caching around it.
Showing 4 of 11 skills at this level.
What it pays in the US
Software Developers, Quality Assurance Analysts, and Testers: median $134,040 a year in the US.
Outlook: 10% growth, 2025-2035.
US Bureau of Labor Statistics, Occupational Outlook Handbook · as of 2026-08-27
With an account, each skill becomes a measured requirement.
Open the full Backend Engineer ladderSystem Design
Three kinds of case.
- Classic interview designs
- Real-world architecture decisions
- Incident post-mortems
291 cases across 5 stages, from fundamentals to ML and GenAI.
- AWS S3 2017: one mistyped command
- Cloudflare: a regex exhausts the CPU
- CrowdStrike 2024: Channel File 291
- Amazon Aurora: the log is the database
- Airbnb: preventing double payments
- Design a CDN
On a 45-minute clock, with a verdict per phase and the reason for each unmet criterion.
See System DesignCertifications
A plan back from your exam date.
Topics by domain, a domain exam after each, two full mocks at the end. You see if the hours fit.
See certificationsAI and Prompting
Lessons that grade what you wrote.
9 tracks in 3 blocks and 15 lessons. 3 are free.
- Ask well
- Give context
- Do not trust what comes ready-made
- AI with data and spreadsheets
- AI to write and communicate
- Security and privacy
- Structured outputs
- Code agents
- Tools and evaluation
Your own words quoted as evidence, criterion by criterion.
Your CV and your link
Every line with its source.
A CV for each job that keeps only what you can back, and a link that shows what you proved and when.
Walk in knowing, or keep hoping.
If nothing changes
- More tabs, more courses, the same doubt.
- Re-studying what you already know.
- A "no" with no reason.
With a map
- One screen: target, proof, next step.
- You study what is missing, in order.
- You walk in knowing what you can defend.
No promise of a job or a pass. A clearer head, a plan, and evidence.
Start free. Go further when you want to.
Reading a job against your CV is free within the plan limits. Pro adds the tailored CV, the practice plan and every track.
Free
To find out your distance.
$0 /mo
- Diagnosis for up to 5 active jobs
- 10 graded answers a month
- 1 before × after CV preview
- 3 AI School lessons
Pro
To close the gap and apply.
… /mo
- A tailored CV for every job
- A practice plan from your gaps
- Every assessment track
- A 360 view: how close you are to each target, against the level expected
- A shareable Passport link, scoped by you
Pro+
Everything in Pro, plus certificates you can share.
… /mo
- Everything in Pro
- Exportable certificates
Prices in USD, billed annually. Cancel anytime; renewal stops.
Start here
Jump straight into the careers, learning trails and guides.
Careers
- Account Executive: career ladder, requirements and skills
- Account Manager: career ladder, requirements and skills
- Accountant: career ladder, requirements and skills
- Actuary: career ladder, requirements and skills
- Agile Coach: career ladder, requirements and skills
- AI/ML Engineer: career ladder, requirements and skills
Learning trails
Questions people ask first
Do I need to know which job I want?
No. You can start from a job (you paste the posting text right after you sign up), a role, a certification or a school (AI or System Design). If you do not know yet, pick a goal (first job, return to work, level up, switch field) and we show role standards with what each one asks. You can change target without losing what you have proven.
Does this guarantee an interview?
No, and be wary of anyone who says it does. What changes is what you send: a CV where every line holds up and a Passport the recruiter can check on their own.
How long does it take?
Building your path takes about 3 minutes. A measurement takes about 5 minutes per topic, up to 20 minutes per session, and you see the time and the number of answers before you start.
What if the result disagrees with how I see myself?
The measurement wins. Your estimate helps pick a target but never enters the result. The screen shows the difference without judgment and tells you what to practice.
Who sees my results?
Your results stay in your account. When you create a Passport link, you choose what it shows.
Does it work outside tech?
Yes. We started with tech and roles already span several areas, including product, marketing, sales, HR and finance.
Know exactly how ready you are.
Pick your target. We show where you stand and the next step.
Choose my targetFree plan with limits · no card · your path ready in ~3 min