Complete low-level design solutions for the most frequently asked machine coding interview questions. Perfect Python code with best practices, design patterns, and clean conventions.
50+ developers landed their dream jobs
4.9/5 average rating from 200+ engineers
Ready-to-use code for complex interview questions
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One-time payment, lifetime access.
Designed specifically for professionals who want to excel in technical interviews with minimal preparation time.
All solutions follow industry-standard coding conventions, proper error handling, and optimized algorithms that would pass any code review.
Each solution implements relevant design patterns and follows SOLID principles to demonstrate your architectural expertise.
Detailed comments and documentation to help you understand the logic and confidently explain your approach to interviewers.
Don't waste weeks implementing these solutions yourself. Get interview-ready in hours, not days or weeks.
Most candidates struggle with system design. Our solutions will give you the competitive edge to impress interviewers.
For less than the cost of two pizzas, you get tools that can help you land positions with 2-3x salary increases.
Each module contains complete Python implementation with documentation, design patterns, and best practices.
A complete LRU, LFU and other caching strategy implementations with O(1) time complexity operations.
Multi-level parking lot management system with vehicle type handling, space allocation, and payment processing.
Task management system with boards, lists, cards, comments, assignments, and activity logging.
Expense management system with group creation, expense addition, split calculation, and debt simplification.
Complete inventory tracking with products, warehouses, orders, and real-time stock management.
A scalable queue system with producers, consumers, topics, and message delivery guarantees.
Rider-driver matching system with location tracking, fare calculation, and driver availability.
The package includes additional modules that cover more systems frequently asked in interviews.
Crafted with attention to detail and focused on making you stand out in technical interviews.
Our solutions follow the same code quality standards used at top tech companies. Write code that impresses even the most experienced interviewers.
Proper separation of concerns with well-defined layers and responsibilities.
Efficient implementations with proper time and space complexity analysis.
Robust error handling with custom exceptions and graceful recovery.
class LRUCache:
def __init__(self, capacity: int):
self.capacity = capacity
self.cache = {}
self.usage_tracker = collections.OrderedDict()
# Maintain most recently used items at the end
def get(self, key: int) -> int:
if key not in self.cache:
return -1
# Update usage by moving to end (most recently used)
self.usage_tracker.move_to_end(key)
return self.cache[key]
Success stories from professionals who landed their dream jobs with our design patterns and solutions.
I was struggling with system design in my interviews. After getting your LLD solutions, not only did I land a Senior Developer role at Amazon, but I was praised for my clear architecture thinking. The optimization patterns in the Cache implementation were exactly what my interviewer was looking for!
Ankit Sharma
Senior Engineer, Amazon
The design patterns in the Cab Booking system were exactly what I needed. Interviewer was blown away by my implementation. Worth 10x the price!
Kavita Patel
Backend Developer, Microsoft
The Parking Lot system helped me understand factory patterns so well. Got offers from two startups after failing interviews before!
Rahul Mehra
Software Engineer, Flipkart
As a bootcamp grad, system design was intimidating. Your solutions bridge the gap that most courses miss. 30% salary bump!
Jay Patel
Full Stack Developer, PayTM
The message queue implementation showed me how to apply Observer pattern correctly. Got complimented in my Google interview!
Priya Verma
SDE II, Google
50+
Landing FAANG jobs
200+
5-star reviews
18k+
Lines of code
40%
Average salary increase
10+
LLD modules
Get access to all modules, updates, and future additions at an unbeatable price.
Everything you need to excel in technical interviews, with full access to all Python implementations of frequently asked system design questions.
10+ Complete LLD Modules - Cache, Parking Lot, Trello, Splitwise, Inventory System, and more
Production-Ready Python Code - Clean, well-documented, and following best practices
Design Patterns & Principles - Applied SOLID, Factory, Observer, Singleton, and more
Detailed Documentation - Architectural decisions, design choices, and implementation details
Interviewer Q&A Preparation - Common follow-up questions with suggested answers
Lifetime Access - All future updates and additions at no extra cost
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After purchase, you'll receive an email with a download link for all modules. You'll get instant access to all the Python code, documentation, and resources.
No. While basic Python knowledge is helpful, our code is well-documented and follows best practices, making it accessible even to those with intermediate Python skills.
These solutions are designed to be learning tools. We recommend understanding the principles and patterns first, then applying them in your own way during interviews.
Join thousands of engineers who have leveled up their system design skills and landed their dream jobs.
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10+ Complete LLD Modules
Production-Ready Python Code
Design Patterns & Principles
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