Type · algorithmic
You are given a stream of user click events, each with a timestamp and a product ID. Design a function to find the top K most frequently viewed products within a sliding time window (e.g., the last 5 minutes).
How to Pass the Notino Software Engineer Interview in 2026
The Notino DNA (TL;DR)
Notino's multi-market e-commerce operations demand candidates who can adapt solutions for diverse regions like Danmark and Great Britain, demonstrating scalable thinking for their 'Shop Beauty' platform.
The Notino Interview Loop
Your onsite loop will typically consist of 5 rounds.
- 1
Round 1
Recruiter ScreenMotivation, role fit, logistics. - 2
Round 2
Coding ScreenLeetCode-medium algorithmic problems under time pressure. - 3
Round 3
System DesignDistributed systems, trade-offs at scale, architecture under constraints. - 4
Round 4
Onsite CodingLeetCode-hard, debugging, code clarity, edge cases. - 5
Round 5
Behavioral / LeadershipPast evidence of ownership, influence, resolving conflict.
The Danger Zone: Top Reasons Candidates Fail
Based on our database of Notino interview outcomes, avoid these common traps:
- Not handling disconnected components or cycles in the graph.
- Failing to add sufficient logging or test cases to verify the fix.
- Inefficiently iterating through lists, leading to O(n*m) complexity instead of O(n+m).
- Ignoring the latency implications of propagating updates across systems.
Test Yourself: Real Notino Questions
Three real prompts pulled from our database.
Type · motivation
What specifically about Notino's mission and our position in the online beauty retail space excites you as a software engineer?
Type · system-design
Design a system to recommend personalized product bundles to users based on their past purchases, browsing history, and current promotions. Consider scalability for millions of users and products.
+ many more questions, signals, and worked examples
Sign up to unlock the full Notino grading rubric
Notino Interview Question Bank
A sample from our database, grouped by round. Sign up to see the full set.
9 of 14 questions shown
1
Recruiter Screen
1- 1
Type · motivation
What specifically about Notino's mission and our position in the online beauty retail space excites you as a software engineer?
2
Coding Screen
3- 2
Type · algorithmic
Given a list of product IDs and their corresponding stock levels, and a list of customer orders (each with a product ID and quantity), write a function to determine which orders can be fulfilled and return a list of unfulfillable order IDs. Assume products have unlimited stock if not specified. - 3
Type · algorithmic
You are given a stream of user click events, each with a timestamp and a product ID. Design a function to find the top K most frequently viewed products within a sliding time window (e.g., the last 5 minutes). - + 1 more questions in this round (sign up to unlock)
3
System Design
3- 4
Type · system-design
Design a system to recommend personalized product bundles to users based on their past purchases, browsing history, and current promotions. Consider scalability for millions of users and products. - 5
Type · system-design
Design a distributed rate limiter for the Notino API. This limiter should prevent abuse and ensure fair usage across different API endpoints and user tiers (e.g., guest vs. logged-in user vs. partner). - + 1 more questions in this round (sign up to unlock)
4
Onsite Coding
4- 6
Type · debugging
A user reports that sometimes, when adding items to their cart, the total price displayed is incorrect. Here's a simplified version of the cart service code. Find and fix the bug. - 7
Type · algorithmic
Implement a function to find the shortest path between two product categories in a graph where edges represent 'related products' or 'frequently bought together' relationships. The graph can be very large. - + 2 more questions in this round (sign up to unlock)
5
Behavioral / Leadership
3- 8
Type · past-evidence
Tell me about a time you had to make a significant technical trade-off on a project (e.g., performance vs. maintainability, speed of delivery vs. feature completeness). What was the situation, what trade-off did you make, and what was the outcome? - 9
Type · past-evidence
Describe a situation where you encountered a critical bug in production that impacted many users. How did you approach diagnosing and resolving the issue under pressure? - + 1 more questions in this round (sign up to unlock)
Unlock all 14 Notino questions, free
No credit card. Every question with its framework, the grading signals interviewers score against, and a worked answer for each.
Interview tracks at Notino
How Notino's DNA translates across functions. Pick your role.
Compare Notino with similar employers
Same DNA, different bar. Browse the closest companies in our database and see how their loops differ.
Action
Same tierThe 'Value-Driven Efficiency' principle at Action guides interviewers to assess how candidates optimize retail operat...
See Action interview questions
R
4 roundsREMA 1000
Same tierREMA 1000's 'Kjøpmann' culture heavily influences interviews, seeking candidates who demonstrate a pragmatic, cost-co...
See REMA 1000 interview questions
Boots
Same tierBoots's 'Feel Good' brand promise guides candidate assessment, emphasizing commercial acumen and a deep understanding...
See Boots interview questions
Practice Notino interviews end-to-end
Notino Mock Interview
Run a live mock interview with our AI interviewer using Notino-style prompts. Get scored on structure, signal, and answer length - exactly how the real loop grades you.
Open
STAR Stories for Notino Behavioral Rounds
Build a Story Bank of your past wins, mapped to the leadership signals Notino interviewers grade on. Reuse them across every behavioral round.
Open
Notino Interview Prep Hub
The frameworks behind every Notino round: CIRCLES for product sense, hypothesis-driven debugging for analytical, STAR for behavioral. Learn each one in 10 minutes.
Open
Interview Frameworks
CIRCLES, STAR, AARRR, RICE, MECE. The exact frameworks that make Notino interviewers nod instead of frown. Step-by-step playbooks with the moves and the pitfalls.
Open
Sample answers
What a strong answer to these Notino interview questions shows.
You are given a stream of user click events, each with a timestamp and a product ID. Design a function to find the top K most frequently viewed products within a sliding time window (e.g., the last 5 minutes).
A strong answer shows: Efficiently manages the sliding window by removing expired events.; Uses appropriate data structures (e.g., a min-heap for top K, a hash map for counts).; Handles concurrency if the stream is processed in parallel..
What specifically about Notino's mission and our position in the online beauty retail space excites you as a software engineer?
A strong answer shows: Demonstrates understanding of Notino's business model and market.; Connects personal technical interests to Notino's challenges or opportunities..
Frequently asked questions
Explore careers on Workfive →