Preppable

Cut the grind.
Get the job.

Preppable® helps software engineers go from practicing endlessly to actually being interview-ready, by showing you exactly what to work on, fixing your skill gaps, and validating your performance with realistic interview simulations.

No credit card required

Our users have landed roles at

300+
Coding
System Design
Component Design
Behavioral

Practice Problems

Hand-picked to help you master coding, design, and behavioral interviews

Coach

Adaptive Practice + Coach

Auto-adapts to your skill level and gives personalized coaching advice

230+

Lessons

Fix your weak spots with targeted learning or follow structured paths

90+
JuniorSDE IISeniorStaff

Interview Loops

Practice full mock interview loops for your target role to build real-world confidence

Real

Ultra-real Simulations

Interviews with chat, voice, whiteboards, debriefs, feedback and hiring decisions

Practice

Train like it's the real interview

Find exactly what’s holding you back

Practice by skill, concept, or let Adaptive Mode surface your weakest areas automatically

Strengths
Hash MapsTwo Pointers
Weaknesses
Dynamic Programming
Coach AdviceStrengthen the weak graph and DP side

You have mastered core patterns like arrays, two pointers, and linked lists, and hash tables are in good shape. Your practice data still shows the biggest skill gaps in graph traversal and dynamic programming, plus several foundational areas that have not been started in practice (DFS, binary search, stacks, heaps). Push a focused block of problems on binary trees, graphs, and sliding-window or DP-style drills before you chase more ad-hoc hard problems in areas you have already maxed out.

Adaptive Mode

Level 5
Developing
67%
Hash Tables8 questions
Proficient
Dynamic Programming12 questions
Exploring
Train under real interview conditions

Each practice problem is structured like a real interview so you learn to perform under pressure

"Given n steps, count how many ways you can reach the top if each move is 1 or 2 steps."

def climb_stairs(n: int) -> int:
    dp = [0] * (n + 1)
    dp[0] = 1
    for i in range(1, n + 1):
        dp[i] = dp[i - 1]
        if i >= 2:
            dp[i] += dp[i - 2]
    return dp[n - 1]
    │
You
Ask for a hint

"I am stuck. Could you please give me a hint?"

Available in 17 languages

Know exactly what to fix

Get detailed feedback on your performance so you can focus on what actually moves you forward

8/10
Pacing
7/10
Correctness
6/10
Independence
8/10
Overall

How You Compare

Count steps

"Your approach to the problem is good. Consider discussing edge cases and..."

View code & solution

Skill Assessment

  • Edge Cases
    Needs Work

Learn

Develop a solid foundation

Focus only on what you need to improve

Get lessons tied directly to your skill gaps, or follow a structured path if you want full coverage

Strengths
Hash MapsTwo Pointers
Weaknesses
Dynamic Programming

Data structures

7/13
  • Hash Maps
    26 min read

Algorithms

4/23
  • Dynamic Programming
    29 min read
Learn by doing

Every lesson includes real-world context and reinforces it through practice

Dynamic Programming

11 min read

Many problems repeat the same subproblems. Memoization stores answers so each (i, j) (or whatever your state is) is computed once.

function fib(n: number, memo = new Map<number, number>()): number {
  if (n <= 1) return n
  if (memo.has(n)) return memo.get(n)!
  memo.set(n, fib(n - 1, memo) + fib(n - 2, memo))
  return memo.get(n)!
}

Bottom-up

Build a table in a clear order (often increasing index). Same recurrence—often O(n) space, sometimes optimizable to O(1) when you only need the previous row.

  • Define state (what one subproblem means).
  • Write transition (how larger problems use smaller ones).
  • Pick base cases and an iteration order that respects dependencies.

Note: Lesson content is not representative of actual lesson and for illustration purposes only

Interview

Validate your interview readiness

Know if you are actually ready

Track your interview readiness with clear signals and get advice on what to fix

Interview Readiness

Unprepared
Building
3
Almost There
4
Prepped!
77%
Hire Rate
Coach AdviceFull-loop performance

Your recent loops show solid pacing on coding rounds—tighten system design by stating requirements and trade-offs in the first 5 minutes. For behavioral, use STAR with a clear result metric so interviewers can score impact.

Senior SWERecommended for You
5 rounds · ~3 hours
Coding ×2
System Design ×2
Behavioral ×1
Custom Loop4 rounds · ~2h 45m
1
Coding
3
System Design
0
Behavioral
See how you would perform in a real loop

Get full debriefs after each interview loop, mirroring how real hiring decisions are made

Senior SWE Loop

Today at 1:39 AM • 4 rounds • 2h 15m

Hire
Pacing
Correctness
Independence

Interview Rounds

Understand every hiring decision

Get detailed feedback per round so you know exactly why you would or wouldn’t get hired

8/10
Pacing
7/10
Correctness
6/10
Independence
8/10
Overall

How You Compare

Count stepsStrong

"Your approach to the problem is good. Consider discussing edge cases and..."

View code & solution

Skill Assessment

  • Edge Cases
    Needs Work

Hub

Stay consistent and on track

Know what to do every week

Set your target interview date and get a clear prep plan with weekly goals to keep you moving

Aug 18
Dec 8, 2026
Week 5 of 1631% complete
Upcoming Interviews

Google

Upcoming
Sep 25

Meta

Oct 9
Weekly goals2/5 done
Practice 3 Coding problems2/3
Review Data Partitioning1/1
Complete 1 Interview0/1
Stay consistent

See your progress, build momentum, and keep your prep on track with clear signals

Consistency
Quick Stats

24

Practice Problems

8

Concept Modules

3

Interview Loops

38h

Spent Prepping

LeaderboardScore

Alex

12,450
2

You

11,200
3

Jordan

10,200
Stay motivated

Follow real activity from other candidates to inspire you to keep your momentum going

Activity
Maya practiced a Level 3 Coding problem

just now

Jordan completed the Hash Tables learning module

4m ago

Sam started a Senior interview loop

12m ago

Riley practiced a Load Balancing problem

1h ago

Alex unlocked the
Streak 7
achievement

2h ago

Casey started an adaptive Coding practice session

3h ago

Quinn started a Staff interview loop

4h ago

Drew completed the API Design learning module

5h ago

Optimal Path

How It Works

Overview

A structured path from your first practice problem to your dream offer

Step 1

Set Your Timeline

Define your target interview date and get a prep plan that adapts to it. Your weekly goals adjust automatically, so you always know what to do next

Aug 18
Dec 8, 2026
Week 5 of 1631% complete
Weekly goals2/5 done
Practice 3 Coding problems2/3
Review Data Partitioning1/1
Complete 1 Interview0/1

Step 2

Start with Adaptive Practice

Let Preppable choose what you should practice next based on your skill level. It continuously adjusts difficulty and focus so you improve faster, without guessing

Adaptive Mode

Level 5
Developing
67%
Dynamic Programming12 questions
Exploring

Step 3

Understand Your Performance

After every practice problem or interview, you get feedback with KPIs, detailed notes, and skills assessment

6/10
Pacing
3/10
Correctness
5/10
Independence
4/10
Overall
Coin Change

"You decomposed the problem recursively, but there is no memoization: the same subproblems are recomputed many times. Add a top-down cache (or bottom-up DP table) keyed by the remaining amount so each state is evaluated once."

View code & solution

Skill Assessment

  • Dynamic Programming
    Very weak
  • Recursion
    Strong

Step 4

Know What to Fix

Utilize coach advice and skill gap analysis to identify your weaknesses

Coach AdviceFocus Area

Dynamic programming keeps showing up as a gap. Prioritize recognizing overlapping subproblems, then practice writing both memoized and tabulated solutions until the recurrence feels automatic—especially on classic sequence, grid, and knapsack-style problems.

Strengths
Hash MapsTwo Pointers
Weaknesses
Dynamic Programming

Step 5

Learn & Reinforce

Learn the concepts behind your weak areas, then lock them in with targeted practice

Dynamic Programming

11 min read

Many problems repeat the same subproblems. Memoization stores answers so each (i, j) (or whatever your state is) is computed once.

function fib(n: number, memo = new Map<number, number>()): number {
  if (n <= 1) return n
  if (memo.has(n)) return memo.get(n)!
  memo.set(n, fib(n - 1, memo) + fib(n - 2, memo))
  return memo.get(n)!
}

Bottom-up

Build a table in a clear order (often increasing index). Same recurrence—often O(n) space, sometimes optimizable to O(1) when you only need the previous row.

  • Define state (what one subproblem means).
  • Write transition (how larger problems use smaller ones).
  • Pick base cases and an iteration order that respects dependencies.

Note: Lesson content is not representative of actual lesson and for illustration purposes only

Dynamic Programming12 questions
Exploring

Step 6

Build Momentum

Repeat the prep cycle: practice → identify gaps → learn → reinforce. See your metrics improve over time

Pacing
Correctness
Independence
Dynamic Programming12 questions
Mastered

Step 7

Validate Your Readiness

Run full interview loops that simulate real hiring decisions. Use debriefs and feedback to refine your performance until you are ready

Interview Readiness

Unprepared
Building
Almost There
Prepped!
91%
Hire Rate
Senior SWERecommended for You
5 rounds · ~3 hours
Coding ×2
System Design ×2
Behavioral ×1

Step 8

Land Your Dream Job

Walk into your interviews confident, and land the role you have been prepping for

Get Offers

✓ Google
✓ Meta
✓ Amazon

Pricing

Complete Prep

Everything you need to go from practice to offers — practice, learning, and unlimited interviews

Pay once and get lifetime access
—
  • Coding, System Design and Behavioral practice problems
  • Adaptive practice mode
  • Unlimited mock interviews
  • Detailed loop debrief and feedback
  • Progress tracking & skill gap analysis
  • Personalized coach advice
  • Structured courses for all disciplines

Why Preppable

The Preppable Difference

Preppable prepares you for the actual interview

End-to-End Preparation

Preppable

Practice + learn + interview in one system

Others

Practice only

Real Interview Simulation

Preppable

Full interview loops

Others

Timed questions

Adaptive Learning

Preppable

Tells you what to do next

Others

You guess

Readiness Signal

Preppable

Know when you're ready

Others

No clear signal

Advanced Progress Analytics

Preppable

Track key performance and progress indicators across all interview types

Others

No progress tracking or personalized insights

Weekly Goals

Preppable

Receive weekly goals based on your target interview date

Others

No goals to keep you on track

Structured Learning Courses

Preppable

End-to-end courses for coding, system design, behavioral, and AI engineering preparation

Others

Lack of focus on behavioral interview preparation

There is more

Powerful features. No fluff

"Design a job scheduler: users define recurring tasks, the system runs them on time, and surfaces execution history…"

Component Requirements

Allow users/systems to define jobs with a schedule (time, frequency). Trigger the execution of scheduled jobs at the specified times. Allow viewing, adding, updating, and deleting scheduled jobs. Record the execution status and output of jobs.

Jobs should execute at the scheduled times. The system should handle a large number of scheduled jobs. Jobs should be triggered with the correct frequency.

Assign the correct component to all boxes labeled as "Replace".

"Given n steps, count how many ways you can reach the top if each move is 1 or 2 steps."

Test results

87% of tests passed

You
Ask for a hint

Can you please give me a hint?

"Tell me about a time you disagreed with a technical decision on your team."

Listening
Unprepared
Building
3
Almost
4
Prepped!
Key performance metrics
Pacing
Correctness
Independence
Quick Stats

24

Practice Problems

8

Concept Modules

3

Interview Loops

12h

Spent Prepping

Achievements (4/8)
Dynamic Programming
Needs Work

Recent pattern

01/1201/1401/1601/1901/21
StrongNeeds WorkVery Weak
"
"

Success Stories

What Our Users Say

Software engineers are getting real interview results with Preppable

Our users have landed roles at

Story 1 of 6

As someone who interviews candidates, I can say that Preppable is an excellent platform. The simulations are incredibly realistic and the interview debrief/interviewer feedback are spot-on. I highly recommend it for anyone looking to break into big tech!

Shubham

Senior Software Engineer at Meta

I was one of the lucky ones who got to try the mock interviews during private preview. They really helped me build the confidence I needed for my upcoming interviews. I was able to land 3 offers within 2 months. Cannot recommend enough!

Jess

Software Engineer at Dice

Preppable's behavioral interviews are a game changer. They teach you how to structure your stories effectively and give you detailed feedback on your communication skills. This is an area that is critical in landing offers (especially for senior positions), but isn't available in any competing platforms.

Sahaj

Senior Software Engineer at Amazon

I tried multiple platforms, but Preppable is by far the best. The system design interviews with interactive drawing boards are exactly like the real thing. The follow-ups and deep dives are very thorough and helpful.

Anmol

Senior Software Engineer at Bayer

I loved the insights into hiring decisions as they show what interviewers look for. Each dashboard told me exactly how I was progressing with clear visibility into my strengths and areas for improvement.

Connor

Software Engineer at Meta

The analytics and feedback here are incredibly detailed. Going through the mock interview loops felt like I was actually at an onsite loop, not a watered-down practice session. Highly recommend!

Steve

Principal Software Engineer at Microsoft

Have questions?

Frequently Asked Questions

Everything you need to know about the platform

Meet the founders

Built with in Seattle

We built Preppable from real experience conducting hundreds of interviews and building large-scale distributed systems at Microsoft Azure. Everything in the platform reflects what actually happens in real interviews

Utsav, slide 1 of 2

Utsav Avatar

Utsav

Co-founder & CEO

Former Microsoft engineer with 10+ years building large-scale distributed systems on Azure. Led teams shipping core infrastructure and founded multiple startups. Also runs Engineering with Utsav (250K+ subscribers), helping engineers level up their careers

Jordan Avatar

Jordan

Co-founder & CTO

Principal architect with 10+ years designing and scaling production-grade Azure systems. Deep expertise in distributed systems and developer platforms

Try it out

Ready to land your dream job?

Go from practice → feedback → real interview simulations — all in one place. See exactly where you stand and what to fix before your actual interviews.

  • No commitment trial
  • No credit card required