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Antra

Mid-sized

Antra is an IT consulting and staffing company that provides software development, data engineering, and technology talent solutions to enterprise clients. It is known for its IT staffing services, custom application development, and workforce training programs.

8 interview notes · updated Jul 2026

Antra·Software Engineer·Technical Phone Screen

Jul 2026
Rapid-fire Java fundamentals round at Antra for a Software Engineer role. The interviewer wanted crisp, no-hesitation answers on core language mechanics, OOP design principles, and Spring Boot internals. Felt more like a quiz than a conversation.
  • Explain the SOLID principles. For each one, give a one-line definition and an example of a violation and how you'd fix it.
  • What is the difference between an interface and an abstract class in Java, and when would you choose one over the other?
  • Compare Java and Python for backend engineering. What are the meaningful differences between the two?
  • What is ArrayList in Java? Walk me through its internal structure and the time complexity of its main operations.
  • How does HashSet work internally in Java, and what are its performance characteristics?
  • What Spring and Spring Boot annotations do you know, and what specifically is the difference between @Repository and @Service?

“I knew the acronym cold but stumbled on the Liskov one.”

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Antra·Software Engineer·Technical Phone Screen

Jul 2026
Did a technical screen for a Software Engineer role at Antra and got the classic sliding window string problem. Nothing too wild, but it's one of those questions where you either know the pattern or you're fumbling around with nested loops and hoping for the best.
  • Given a string, find the length of the longest substring that contains no repeating characters.

“I knew this was a sliding window problem pretty fast, which helped.”

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Antra·Software Engineer·Technical Phone Screen

Jun 2026
Interviewed for a Software Engineer role at Antra and got a project deep-dive question that sounds straightforward but really isn't if you haven't rehearsed the specifics.
  • Walk me through a recent project in detail: what problem you were solving, the design decisions you made and alternatives you weighed, the challenges you hit, your specific contribution versus the team's, and the measurable outcome.

“This is the kind of question where you think you're ready and then halfway through you realize you've been saying 'we' for five minutes straight and the interviewer has no idea what you personally did.”

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Antra·Software Engineer·Technical Phone Screen

Jun 2026
Interviewed for a software engineer role at Antra and got a pretty standard algorithmic question. Nothing too wild, sliding window stuff you've seen a hundred times if you've done any prep.
  • Given a string, find the length of the longest substring that contains no repeated characters.

“Classic sliding window problem.”

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Antra·Software Engineer·Technical Phone Screen

Jun 2026
Interviewed for a Software Engineer role at Antra and got hit with a classic OOP theory question. Not a bad experience, just one of those technical screens where they want to see if you actually understand the fundamentals versus just having memorized buzzwords.
  • What are the differences between an interface and an abstract class, and when would you choose one over the other?

“I started with the easy stuff, what each can hold.”

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Antra·Software Engineer·Technical Phone Screen

Jun 2026
Had a technical phone screen for a Software Engineer role at Antra that was basically one long OOP theory question dressed up as a design discussion. They wanted SOLID principles explained with actual examples, not just definitions, which I wasn't fully ready for.
  • Walk through each of the SOLID principles and give a concrete example or anti-pattern for each one.

“I knew the acronym cold but stumbled when they pushed for actual code examples.”

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Antra·Software Engineer·Technical Phone Screen

May 2026
Interviewed for a Software Engineer role at Antra and got a string manipulation problem. Pretty straightforward coding round, nothing too wild.
  • Given a string, count the occurrences of each character and return the results ordered by each character's first appearance in the string. The comparison must be case-sensitive.

“Pretty clean problem once you see it.”

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Antra·Software Engineer·Technical Phone Screen

Apr 2026
Behavioral/technical hybrid round at Antra for a Software Engineer role. The whole thing was basically one big debugging story prompt, which sounds simple but they really wanted you to walk through every layer of your process.
  • Walk me through a time you dealt with a difficult bug. How did it surface, how did you narrow down the cause, what was the root cause and fix, how did you verify it, and what did you take away from it?

“This is deceptively broad.”

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