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3DiCompany guide
Updated weekly · Reviewed by the Dataford team
3Di interview process & guide 2026
Interview difficulty 5.5 / 10Based on 12 interview reports
Everything we know about interviewing at 3Di: what each round tests.
Software Engineer
01 · Difficulty and outcomes
How hard is the 3Di interview?
Aggregated from 12 interview experiencesDifficulty mix
Easy9%
Medium64%
Hard27%
Most loops land in the middle: hard enough to prep for, rarely brutal.
Experience sentiment
50%positive
Positive 50%Neutral 33%Negative 17%
02 · Topic breakdown
What 3Di actually tests for
How prominent each skill is across reported loops100%
Java
96%
Spring Boot
92%
Database Concepts / DBMS
88%
SQL
84%
Object-Oriented Programming (OOP/OOPS)
80%
Dependency Injection (DI)
76%
SQL Basics (Queries/Concepts)
72%
MongoDB
68%
String Manipulation
64%
Git (Version Control)
60%
Array Manipulation
56%
Algorithmic Problem Solving
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 3Di interviewers actually ask that position, the loop structure, and pay by level.
Showing 1 of 1 role guides
04 · FAQ
3Di interview FAQ
Answered from real candidate and workplace dataHow hard is the 3Di interview?
Candidates most commonly rate 3Di interviews as medium, based on 12 reported interviews.
What topics does 3Di test in interviews?
3Di interviews most often cover Java, Spring Boot, Database Concepts / DBMS, SQL, and Object-Oriented Programming (OOP/OOPS). The exact emphasis depends on the specific role you apply for.
What roles can I prepare for at 3Di?
Dataford has interview guides for 1 role at 3Di, including Software Engineer.
Ready for your 3Di interview?
Practice the exact questions from this guide with AI feedback, and walk into your loop knowing what to expect.
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Roles at 3Di
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