Rage Coffee Full Stack Developer Interview: Rounds, Questions and Preparation

What the job involves

As a Full Stack Developer at an Indian unicorn or high-growth startup like Rage Coffee, you will build and maintain both client-side and server-side components of web applications, often working across the entire stack to ship features quickly. Expect to collaborate with product, design, and other engineers to create scalable, user-facing solutions in a fast-paced environment. Your day-to-day may include writing clean code, debugging, integrating APIs, and deploying to cloud platforms.

Role and Technical Knowledge

1. 1

   Explain the difference between frontend and backend development, and how they interact in a full stack application.

   A strong answer covers client-server architecture, HTTP requests, and how data flows from UI to database and back.

2. 2

   What are the key considerations when designing a REST API for a high-growth startup?

   Mention scalability, statelessness, proper HTTP methods, versioning, and security practices like authentication.

3. 3

   How would you ensure your code is maintainable and scalable in a fast-paced startup environment?

   Focus on modular code, documentation, testing, code reviews, and using design patterns where appropriate.

4. 4

   Describe how you would handle state management in a React application.

   Discuss local state vs global state, use of Context API or Redux, and when to choose each based on app complexity.

Practical Scenarios

1. 5

   You are building a feature for a coffee subscription startup where users can customize their orders. How would you design the database schema?

   Outline tables for users, products, orders, and customizations, emphasizing relationships and normalization.

2. 6

   A critical API endpoint is slow and causing a poor user experience. How would you diagnose and fix the issue?

   Mention profiling, checking database queries, adding indexes, caching, and optimizing code.

3. 7

   You need to implement user authentication for a new app. What approach would you take?

   Discuss JWT or session-based auth, password hashing, OAuth for social login, and secure storage of tokens.

4. 8

   How would you deploy a full stack application to the cloud with minimal downtime?

   Talk about CI/CD pipelines, containerization with Docker, blue-green deployments, and monitoring.

Behavioural and HR

1. 9

   Tell me about a time you had to learn a new technology quickly for a project.

   Use STAR method, highlight resourcefulness, and show how you applied the learning effectively.

2. 10

   Describe a situation where you disagreed with a team member on a technical approach. How did you handle it?

   Emphasize communication, listening, data-driven decisions, and willingness to compromise for the team's goal.

3. 11

   Why do you want to work at a high-growth startup like Rage Coffee instead of a larger, more established company?

   Show enthusiasm for fast-paced environments, ownership, and impact; align with startup values like agility and innovation.

4. 12

   How do you prioritize tasks when you have multiple deadlines?

   Discuss using urgency vs importance, communication with stakeholders, and tools like Kanban or time-blocking.

Problem Solving and Coding

1. 13

   Write a function to reverse a linked list. Explain your approach.

   Cover iterative vs recursive solutions, time/space complexity, and edge cases like empty list.

2. 14

   Given an array of integers, find two numbers that sum to a target. How would you optimize?

   Start with brute force, then use hash map for O(n) solution; discuss trade-offs.

3. 15

   How would you detect a cycle in a linked list?

   Explain Floyd's cycle-finding algorithm (tortoise and hare) and its O(n) time, O(1) space.

4. 16

   Implement a function to check if a string is a palindrome, considering only alphanumeric characters.

   Discuss two-pointer technique, handling case and non-alphanumeric characters, and edge cases.