Type · algorithm
Given a stream of task results from Tolokers, write a function to calculate the rolling average of worker accuracy over the last N tasks.
Growth · Software Engineer Interview Guide
Sign up to see ATSHeadquartered in SwitzerlandInterview language: English
How to Pass the Toloka Software Engineer Interview in 2026
The Toloka DNA (TL;DR)
The 'With Integrity Shape the Next' principle anchors Toloka's loop, grading how candidates design scalable quality-control loops for crowd-sourced data. Interviewers look for a metric-with-denominator approach to managing annotator bias and throughput on the Enterprise Platform.
The Toloka 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 Toloka interview outcomes, avoid these common traps:
- Focusing on the blame rather than the resolution
- Using an O(N) approach inside a loop leading to O(N*M) complexity
- Jumping to code changes without checking logs or metrics
- Ignoring the latency of task assignment
Test Yourself: Real Toloka Questions
Three real prompts pulled from our database.
Type · data-processing
You have a large list of task assignments. Group them by worker ID and find the top 3 most active workers.
Type · debugging
A service that aggregates Toloka task results is intermittently failing under high load. How do you debug it?
+ many more questions, signals, and worked examples
Sign up to unlock the full Toloka grading rubric
Toloka Interview Question Bank
A sample from our database, grouped by round. Sign up to see the full set.
9 of 12 questions shown
1
Recruiter Screen
1- 1
Type · motivation
Why are you interested in working on crowdsourcing and data labeling platforms like Toloka specifically?
2
Coding Screen
3- 2
Type · algorithm
Given a stream of task results from Tolokers, write a function to calculate the rolling average of worker accuracy over the last N tasks. - 3
Type · algorithm
Design a rate limiter for the Toloka API to prevent spamming from automated scripts. - + 1 more questions in this round (sign up to unlock)
3
System Design
3- 4
Type · architecture
Design a distributed system to distribute millions of micro-tasks to thousands of Tolokers in real-time. - 5
Type · architecture
How would you design a system to detect and flag low-quality or malicious data submissions in real-time? - + 1 more questions in this round (sign up to unlock)
4
Onsite Coding
3- 6
Type · debugging
A service that aggregates Toloka task results is intermittently failing under high load. How do you debug it? - 7
Type · algorithm
Implement a weighted random sampler to assign tasks to workers based on their historical accuracy scores. - + 1 more questions in this round (sign up to unlock)
5
Behavioral / Leadership
2- 8
Type · ownership
Tell me about a time you identified a critical bug in production and how you handled it. - 9
Type · conflict
We often face a trade-off between maximizing task throughput for clients and maintaining strict annotation quality standards. Tell me about a time you had to defend a technical decision that prioritized long-term data integrity over short-term platform velocity. What were the specific metrics you used to convince stakeholders?
Unlock all 12 Toloka 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 Toloka
How Toloka's DNA translates across functions. Pick your role.
Compare Toloka with similar employers
Same DNA, different bar. Browse the closest companies in our database and see how their loops differ.
Nothing
Same tierNothing seeks individuals who can articulate their design rationale, especially regarding the user experience of prod...
See Nothing interview questions
Character.AI
Same tierCharacter.AI's product-centric interviews grade for an intuitive grasp of user interaction with AI, particularly arou...
See Character.AI interview questions
Doctolib
Same tierUser-centricity for both patients and practitioners, deep empathy for healthcare workflows, and a strong focus on dat...
See Doctolib interview questions
Practice Toloka interviews end-to-end
Toloka Mock Interview
Run a live mock interview with our AI interviewer using Toloka-style prompts. Get scored on structure, signal, and answer length - exactly how the real loop grades you.
Open
STAR Stories for Toloka Behavioral Rounds
Build a Story Bank of your past wins, mapped to the leadership signals Toloka interviewers grade on. Reuse them across every behavioral round.
Open
Toloka Interview Prep Hub
The frameworks behind every Toloka 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 Toloka interviewers nod instead of frown. Step-by-step playbooks with the moves and the pitfalls.
Open
Sample answers
What a strong answer to these Toloka interview questions shows.
Given a stream of task results from Tolokers, write a function to calculate the rolling average of worker accuracy over the last N tasks.
A strong answer shows: Efficiency; Data structure selection.
You have a large list of task assignments. Group them by worker ID and find the top 3 most active workers.
A strong answer shows: Algorithmic optimization; Memory management.
Frequently asked questions
Explore careers on Workfive →