Your goalYour preparation path Explore connects your target role to interview rounds, practice tasks and the gaps to work on next
01 HR screening02 Technical answers03 Knowledge check04 Algorithm coding05 Platform coding06 SQL case07 Behavioral
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 target Role · Level · Specialization · Company
Your rounds What to expect and where to practise
Your next task Readiness gaps guide the next drill
Find the taskTrain the skill Search Practice by task or topic. Narrow it down by round, role and difficulty.
More doingLess 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.
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 Your code Your tests Your question
Step-by-stepUnderstand 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.” A clear goal Know what this step needs to achieve. The reasoning See what to do and why it works. A way to verify Check the result before moving on. Longest Rising Sequence
1. Contract 2. Invariant 3. Binary search
ReadinessKnow 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 experienceTell 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
Understand the roundThen make it yours Learn the approach before your next attempt. Keep the useful ideas close.
Find your roundKnow 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 interviewsBetter practice Share what your interview was like. Reports go through human review to help create original practice.
Share your experience Your interview experience What happened? What mattered? Share the pattern
Your next step?Choose your pace
Free Start your preparation
$0 No 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
$49 per 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 goodquestions 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.