Uber L3 Loop

Company GuideJuniorSoftware Engineer I · Last checked Nov 2026

L3 loops are coding heavy. Two coding rounds and a collaboration and leadership conversation carry the decision, and interviewers expect code that compiles, runs, and passes the tests you write.

The Rounds

Screens

Recruiter CallCovers your background, the role, location, and level expectations. · 30 minPractice Recruiter Call
Online AssessmentTimed data structures and algorithms problems, scored automatically.Practice Online Assessment
Technical Phone ScreenOne or two medium problems in CodeSignal, written to run and tested as you go. · 60 minPractice Technical Phone Screen

Onsite

Coding: Algorithms and Data StructuresOne or two problems in CodeSignal, with runnable code and your own test cases. · 60 minPractice Coding: Algorithms and Data Structures
Coding: Depth in SpecializationA role-specific round, often building a small working program such as a parking lot or a stopwatch. · 60 minPractice Coding: Depth in Specialization
Collaboration and LeadershipUsually with the hiring manager: teamwork, handling failure, and examples from internships or school. · 60 minPractice Collaboration and Leadership

What the L3 Loop Weighs

Runnable code with test cases you design yourself.
A small program with clean structure that holds up when requirements change.
Clear communication while you code.
Stories that show ownership, collaboration, and learning from failure.

Sources

Last checked Nov 2026. Loops vary by team and change over time, so confirm the details with your recruiter.