Multi-Step Coding Practice Platform for Interview Prep
Master realistic coding challenges with evolving requirements.
1Introduction to Multi-Step Coding Challenges
This platform offers coding questions that simulate real-world interview scenarios. Each challenge builds on the previous step, introducing new requirements and constraints. Designed for Python and TypeScript, it includes 22 questions reported at Anthropic and OpenAI. Users can practice under timed conditions, preparing for the pressure and tradeoffs of technical interviews.
2Rate Limiter Challenge Overview
The Rate Limiter question is a four-step challenge with a 45-minute time limit. Each step adds a new requirement to the solution, such as implementing a fixed window counter, sliding window log, token bucket with burst, and per-tier limits with quotas and eviction. This approach helps users understand how to adapt their code to evolving requirements.
3Timed Practice and Progress Tracking
The platform tracks time spent on each step and the overall question, allowing users to identify where follow-ups impacted their pace. With 118 steps across 24 questions, users can log 19.5 hours of timed practice. Over 1004 test cases ensure comprehensive feedback on code performance and correctness.
4Visible Test Files and Debugging
Users can read and run test modules in a multi-file workspace, making it easier to debug and understand why a solution failed. This feature replicates real-world coding environments, where developers must navigate multiple files and dependencies to resolve issues effectively.
5Duplicate File Finder Challenge
This five-step challenge involves walking a directory tree to group files with identical contents. Subsequent steps add complexity, such as handling huge files, correcting symlinks, generating reports, and configuring ignore rules. It tests users' ability to manage file systems and optimize code for performance.
6Image Transform Pipeline Challenge
The Image Transform Pipeline challenge requires users to process source images through JSON-described transformation pipelines. Steps include building the transform engine, directory plumbing, cross product, edge cases, and decode-once optimization. This tests users' ability to handle complex workflows and optimize resource usage.
7Premium Features and Pricing
The platform offers premium features for $12/month, including access to 18 additional full-length questions and 90 steps. Users can cancel anytime, and their saved progress remains intact. Premium steps re-lock if the subscription ends, but all solved questions and code are retained.
8Why This Platform Matters
This platform provides a realistic and comprehensive way to practice coding challenges for technical interviews. By focusing on multi-step problems with evolving requirements, it helps developers build the skills needed to succeed in high-pressure interview environments. The timed format and detailed feedback ensure users are well-prepared.
Original article: Hacker News: Show HN — Multi-Step Coding Practice Platform for Interview Prep