From first hello to final round
Ace your IT interview

Interview preparation for Frontend, Backend and Full-stack engineers.

Junior to Senior+ · No credit card to start

HR screening workspace with its complete task and response controls.

Your goal
Your preparation path

Explore connects your target role to interview rounds, practice tasks and the gaps to work on next

Start with your target

Level
Create my path

Frontend engineer

Middle · React · Product company

Algorithm coding

Think it through Then prove it.

Clarify the problem, choose an algorithm and run your solution against tests.

At your target level

Make it reliable and explain the trade-offs

Show depth, reliability and clear technical choices

Your targetRole · Level · Specialization · Company
Your roundsWhat to expect and where to practise
Your next taskReadiness gaps guide the next drill

More doing
Less guessing

Find the right task in Practice. Write code, work across files, run queries or explain your answer aloud.

Find a task

Filter by interview stage, role, topic, difficulty and company. Build a task queue and work through it at your own pace.

Think it throughThen run it
Complete AceStack AI platform coding workspace: task, file tree, code editor, tests and submission.

Stuck?
Ask AI Coach

Get help with the code, checks and errors in your current attempt. Leave with one concrete next move.

Understand the problem
Ask about a failed check, an error or a missing edge case.
Keep moving
Get an action you can try, with a way to check it.
Open a practice task
Actual AI Coach panel with contextual quick actions, question field and Send control.

Step-by-step
Understand every move

Open the saved solution after Submit or Give up. Follow the reasoning, inspect the code and check why it works.

From “what now?”
to “I get it.”

  1. A clear goalKnow what this step needs to achieve.
  2. The reasoningSee what to do and why it works.
  3. A way to verifyCheck the result before moving on.
Longest Rising Sequence
Complete worked solution step with goal, actions, reasoning and verification.

Readiness
Know your score

See how prepared you are for each interview round, with a score out of 100 calculated from your reviewed attempts.

A separate score
for every round

0–100

A higher score means stronger demonstrated readiness. Track screening, coding and SQL separately to see where you’re ready and where to practise next.

See your readiness

What goes into your score

Recent results
How you performed in your latest reviewed attempts
Overall results
Your performance across the round’s reviewed attempts
Coverage
How many different questions, topics and task types you have practised
Consistency
How reliably you perform across attempts
Difficulty
The challenge level of the tasks you complete

Your experience
Tell the story

Turn real situations into clear behavioral answers. Plan with STAR, CARL or SOAR, practise aloud and review your attempt.

Get help from AI Coach
Complete Behavioral workspace with answer frameworks, story planning and recording controls.

Understand the round
Then make it yours

Learn the approach before your next attempt. Keep the useful ideas close.

Find your round
Know what’s available

Practise in the workspaces available today. We’re improving them and building more ways to prepare for design and specialist rounds.

Available now

Core practice

  • HR screening

    Explain your experience, motivation and fit for a role

  • Technical screening

    Answer technical questions and explain your reasoning

  • Knowledge check

    Find gaps in your technical foundations

  • Algorithm coding

    Solve a problem, choose an approach and test your code

  • Platform coding

    Make changes across a real project and verify them

  • SQL case

    Explore a schema and answer a question with SQL

With Focus plan

  • All core practice

    Keep using every core workspace and your preparation path

  • Behavioral

    Turn real experiences into clear STAR, CARL or SOAR answers

  • AI Coach

    Get contextual help with the code, errors and checks in your task

  • More monthly reviews

    Review more attempts and keep tracking your readiness

In development

Full plan

For the wider software engineering interview loop

  • Problem Solving

    Break down ambiguous problems and justify decisions

  • Debugging

    Find the cause of a failure and verify your fix

  • Low-Level Design

    Design clear interfaces, contracts and maintainable code

  • System Design

    Plan architecture and explain scaling and reliability trade-offs

Advanced plan

For specialist ML, data and infrastructure interviews

ML & data
  • ML Notebook Lab

    Explore data, build a baseline and evaluate a model

  • Experiment Review

    Assess experiments, metrics and whether the results support a decision

  • ML System Design

    Design the training, serving and monitoring of an ML system

  • Model Incident Simulator

    Investigate model failures, drift and recovery options

DevOps & SRE
  • Incident Console

    Diagnose a production incident using operational evidence

  • CI/CD Debugger

    Find and fix build or deployment pipeline failures

  • Kubernetes Lab

    Troubleshoot workloads, networking and cluster configuration

  • Infrastructure Review

    Review infrastructure decisions, reliability and operational risk

  • Observability Case

    Use logs, metrics and traces to explain system behaviour

  • Incident Command

    Coordinate response, communication and recovery during an incident

Real interviews
Better practice

Share what your interview was like. Reports go through human review to help create original practice.

Share your experience
Your interview experienceWhat happened?
What mattered?
Share the pattern
Human review

Your next step?
Choose your pace

Free

Start your preparation

$0No card · No expiry
Build my preparation path

Included for the lifetime of your account

Screening reviews
20
Coding + SQL reviews
20
  • HR and technical screening
  • Knowledge checks
  • Algorithm and platform coding
  • SQL case practice
  • Your preparation path
  • Readiness, attempts and session reports
  • Saved solutions after Submit or Give up

Focus

Practise with coaching

$49per month
Explore Focus

Included each month

AI reviews
60
AI Coach messages
200
  • Everything in Free
  • Behavioral interview practice
  • STAR, CARL and SOAR frameworks
  • AI Coach help in your current task
  • Help with errors, edge cases and performance
  • One monthly review pool across included rounds
  • Code and SQL runs do not use AI reviews
Compare all plans

A few good
questions

Who is AceStack AI for?+

Frontend, Backend and Full-stack engineers preparing for interviews, from Junior to Senior+. ML, data and infrastructure workspaces are in development.

Do I need an account?+

Yes, to save your path, practise tasks and track results. Learn, interview-stage guides and the product blog are public.

What’s included in Free?+

HR and technical screening, knowledge checks, algorithm and platform coding, and SQL. Your account includes 20 screening reviews and 20 shared coding/SQL reviews for the lifetime of your account.

What if I get stuck?+

Read a saved step-by-step solution after Submit or Give up. Focus adds contextual help from AI Coach while you work.

Can I practise on my phone?+

You can browse tasks, read guides and review results on mobile. A larger screen gives code, project files and SQL more room.

Walk in prepared
Make your next move

Build my preparation path