Glassdoor users rated their interview experience at 99Tech as 100% positive with a difficulty rating score of 3 out of 5 (where 5 is the highest level of difficulty). Candidates interviewing for Backend Developer and rated their interviews as the hardest, whereas interviews for Backend Developer and roles were rated as the easiest.
The hiring process at 99Tech takes an average of 90 days when considering 1 user submitted interviews across all job titles. Candidates applying for Backend Developer had the quickest hiring process (on average 90 days), whereas Backend Developer roles had the slowest hiring process (on average 90 days).
1st ground is home assignment: 3 simple tasks, it will take about five hours for finish. I passes it
2st interviewer will ask about that anh follow some letcode live
I applied through a recruiter. I interviewed at 99Tech in Nov 2025
Interview
1. Home assessment: solve 3 problems: 1 js + 1 UI coding + 1 review/refactor code
2. Tech interview: the interviewer will verify if you did the assignment on your own or using AI. Better explain all the details and answer the follow-up questions
I applied online. The process took 3 months. I interviewed at 99Tech in May 2024
Interview
They have 1 leet code challenge and 1 live question and answer challenge related to technical stuffs, this round also includes system design questions. They seems to focus on assessing problem solving mindset.
Interview questions [1]
Question 1
You need to calculate time complexity and space complexity of some functions