Dataford
Interview QuestionsInterview GuidesExperiencesCoaching
New
Pricing
Get started
Dataford
Popular roles
Software EngineerData AnalystData ScientistData EngineerBusiness AnalystAI EngineerMachine Learning EngineerProduct Manager
Browse
Browse All RolesEvery role hub, from analyst to MLBrowse All CompaniesCompany-specific interview loopsAll Interview GuidesThe full guide library
Top questions by role
Software EngineerData AnalystData ScientistData EngineerBusiness AnalystAI EngineerMachine Learning EngineerProduct Manager
Top questions by skill
SQLPythonStatisticsMachine LearningA/B TestingSystem DesignGenerative AIProduct SenseMetricsBehavioral
Browse all questions →Try a mock interview
Experiences
Practice
Mock InterviewsTimed interview simulations with feedbackCoaching1:1 coaching with people at your target companiesSuccess PathYour 6-week structured planModulesCurated lessons by topicWebinarsTalks from ex-Big Tech data leadsPlaygroundA free-form scratch editor
Learn
BlogInterview strategy and career adviceTech Job Market ReportHiring trends across data and AI rolesFor UniversitiesDataford for career centersAbout DatafordWho we are and how we build
Pricing
Build my plan
Interview Guides/Celestar
Celestar logo
CelestarCompany guide
Updated weekly · Reviewed by the Dataford team

Celestar interview process & guide 2026

Based on 3 interview reports

Everything we know about interviewing at Celestar: what each round tests and compensation by level.

Data ScientistProject ManagerSecurity EngineerSoftware EngineerStatistician

At a glance

5
Role guides
3
Interview reports
12
Topics tracked
$149k
Median total comp
01 · Difficulty and outcomes

How hard is the Celestar interview?

Aggregated from 3 interview experiences
Difficulty mix
Easy67%
Medium33%
Hard0%
Most candidates rate the loop easy, but few walk in cold.
Experience sentiment
67%positive
Positive 67%Neutral 0%Negative 33%
02 · Topic breakdown

What Celestar actually tests for

How prominent each skill is across reported loops
100%
Python
100%
Project Management
100%
Information Security (General)
100%
IAM (Identity and Access Management)
96%
Machine Learning (ML)
96%
Cloud Security
96%
Program Management
96%
Monitoring and Oversight
96%
Statistical Modeling
93%
R
83%
Quality Assurance Frameworks (QAF)
79%
Security Engineering
Tested less
Tested more
03 · Role guides

Find the guide for your role

This is your next step: open the guide for the role you are interviewing for. Each one carries the questions Celestar interviewers actually ask that position, the loop structure, and pay by level.

Showing 5 of 5 role guides
Data Scientist
$40k-$950k
Open guide
Project Manager
$73k-$142k
Open guide
Security Engineer
$112k-$161k
Open guide
Software Engineer
$100k-$170k
Open guide
Statistician
$128k-$196k
Open guide
04 · Compensation

What Celestar pays, by level

Estimated total compensation: base salary plus stock and annual cash bonus.

Median $149k
Level$0kTotal comp range$950kTotal
All levels
Base $40k-$950k
$40k-$950k
Ranges blend verified compensation data points. Base + stock + annual bonus shown. Estimates only.
05 · FAQ

Celestar interview FAQ

Answered from real candidate and workplace data
How hard is the Celestar interview?

Candidates most commonly rate Celestar interviews as medium, based on 3 reported interviews.

How much does Celestar pay?

Reported total comp across roles at Celestar ranges from roughly $40k to $950k per year, varying by level, team, and location.

What topics does Celestar test in interviews?

Celestar interviews most often cover Quality Assurance Frameworks (QAF), Security Engineering, Python, Project Management, and Information Security (General). The exact emphasis depends on the specific role you apply for.

What roles can I prepare for at Celestar?

Dataford has interview guides for 5 roles at Celestar, including Data Scientist, Project Manager, Security Engineer, and Software Engineer, and more.

Where is Celestar headquartered?

Celestar is headquartered in Athens, Greece.

06 · Keep prepping

Related company guides

Companies that hire for the same roles
Uline23 guidesDaikin17 guidesGrainger15 guidesGrainger Corporate Services14 guidesUNFI14 guidesW.W. Grainger14 guides
On this page0% read
How hard is it?What Celestar evaluatesQuestions and role guidesCompensation by levelFAQRelated guides
Prep for Celestar with a plan

A day by day plan built from this guide, with the questions Celestar actually asks.

Build my plan

Ready for your Celestar interview?

Practice the exact questions from this guide with AI feedback, and walk into your loop knowing what to expect.

Start practicing freeView pricing
Keep exploring

Browse every guide, role and company

Roles at Celestar
Celestar Data ScientistCelestar Project ManagerCelestar Security EngineerCelestar Software EngineerCelestar StatisticianAll 5 roles
Celestar prep plans
Celestar Interview QuestionsCelestar Data Scientist Interview QuestionsCelestar Project Manager Interview QuestionsCelestar Software Engineer Interview QuestionsCelestar Statistician Interview QuestionsCelestar Security Engineer Interview QuestionsAll prep collections
Other companies
Uline interview questionsDaikin interview questionsGrainger interview questionsGrainger Corporate Services interview questionsUNFI interview questionsBrowse all companies
Keep exploring
All interview guidesPractice questionsBrowse companies
Dataford

Interview guides, real questions, and mock interviews for tech roles.

Interview Prep

Interview GuidesInterview QuestionsInterview ExperiencesMock InterviewsPersonalized PrepPricing

Popular Roles

Software EngineerData AnalystData ScientistData EngineerBusiness AnalystAI EngineerMachine Learning EngineerProduct ManagerQA EngineerProject ManagerBrowse All Roles

Explore

Browse CompaniesBlogTech Job Market ReportUniversitiesBecome a Coach
About·Contact·Privacy·Terms
LinkedInYouTube
© 2026 Dataford, Inc.