Uber Frontend Engineer Interview Experience & Questions

Overview

A candidate recently completed Uber's frontend engineer interview process for a Software Engineer II / Senior Frontend position, receiving an offer with a CTC of 65 LPA. The interview process consisted of 5-6 comprehensive rounds designed to evaluate not just coding ability, but engineering maturity, system design thinking, and collaboration skills. Uber's interview process stands out for its emphasis on real-world problem-solving and frontend-specific challenges, while still maintaining some traditional DSA components—though the company is actively moving toward more frontend-focused evaluations.

Interview Process

The interview process was structured across multiple stages, each building progressively on the previous round:

1. Online Screening Test (CodeSignal) – 35 minutes
2. Machine Coding Interview – Project discussion + UI challenge
3. JavaScript Deep Dive – Advanced concepts and async programming
4. DSA Coding Round – Graph and array problems
5. System Design Interview – Frontend high-level design
6. Behavioral Round – Collaboration and leadership assessment

Technical Rounds

Round 1: Online Screening Test (CodeSignal)

The candidate was asked to complete a 35-minute CodeSignal assessment comprising two coding questions and eight multiple-choice questions.

Coding Questions:

• Sum of Digits: A problem requiring the summation of digits until reaching a single-digit result.
• Longest Substring Without Repeating Characters: The candidate was asked to solve this using the sliding window technique and HashMap.
• Additional DSA questions covering arrays and graphs were included.

MCQ Topics:

• JavaScript quirks and edge cases
• Web performance fundamentals
• Browser behavior and internals
• DOM fundamentals
• HTML and CSS concepts
• Basic debugging scenarios

Preparation Tip: Practice competitive programming-style problems and review frontend MCQs focusing on browser internals, JavaScript quirks, and debugging techniques.

Round 2: Machine Coding Interview

This round was divided into two parts. First, the candidate was asked to discuss past project experience, focusing on performance optimizations and real-world challenges faced.