Interview Experience: Meta | Software Development Engineer (SDE-1) | E3

📌 Job Role: SDE 1
🎯 Job Level: E3
🔢 Number of Rounds: 4
📜 Offer Status: Rejected
📍 Location: London
👤 Candidate Name: Not disclosing due to signed NDA

Preparation Strategy

For preparation, I focused on:

• LeetCode (Medium & Hard problems), particularly topics like stacks, trees, and linked lists.

• Behavioral Questions, using the STAR method to structure responses.

• Mock Interviews, practicing under timed conditions to improve speed and accuracy.

Despite having some coding experience (approximately six months), the unexpected difficulty level in the final round was a challenge.

Interview Process

The process consisted of four rounds:

1. Phone Screen – Coding round

2. Behavioral Interview – Soft skills and problem-solving mindset

3. Coding Round 1 – Medium-difficulty coding questions

4. Coding Round 2 – Hard-difficulty coding questions

One of the biggest surprises was that the recruiter mentioned I would only face medium-difficulty questions, but the final round had two hard questions, making it significantly tougher.

Interview Rounds

Round 1 : Phone Screen (Coding Round)

Difficulty: Medium

Experience

This round consisted of two coding questions:

1. Given an array of integers, determine how many monotonic sequences the array is built of.

2. Merge K Sorted Lists (Simplified) – Problem Link

I was able to solve both questions with time left for explanation, which helped me proceed to the next round.

Learnings

• Clearly explain the thought process behind solutions.

• Practice array manipulation and merging problems.

Round 2 : Behavioral Interview

Difficulty: Medium

Experience

This round focused on soft skills and problem-solving mindset. Some of the questions included:

1. Describe a time when you worked with a challenging person.

2. Tell me about a time when you received negative feedback.

3. Describe a situation when you had little time to finish a job.

4. Tell me about a time when you had a conflict with a colleague.

I performed well in this round as I had prepared specific examples for each question.

Learnings

• Use the STAR method to structure responses.

• Show strong communication skills and adaptability in handling workplace challenges.

Round 3 : Coding

Difficulty: Medium

Experience

This round included two medium-level coding problems:

1. Minimum Add to Make Parentheses Valid – Problem Link

2. Simplify Path – Problem Link

I was able to solve both problems but received some unexpected follow-up questions. The interviewer repeatedly asked about the contents of the stack I used, which caught me off guard.

Learnings

• Be prepared to explain the data structures used in solutions.

• Practice stack-based problems and string manipulations.

Round 4 : Coding

Difficulty: Hard

Experience

This was the most challenging round. Although I was told to expect medium-level questions, both were hard:

1. Convert Binary Search Tree to Sorted Doubly Linked List – Problem Link

2. Design Skiplist (Search Function Only) – Problem Link

I had not encountered the BST-to-Doubly-Linked-List problem before, and despite hints from the interviewer, I could not solve it. The Skiplist problem was also unexpected, and I only managed to partially complete the solution.

This round was likely the reason I did not receive the offer. Additionally, all my interviewers had an infrastructure background, while my interests were in web and app development, which may have contributed to a mismatch.

Learnings

• Develop a strong understanding of advanced data structures like BSTs and Skiplists.

• Prepare for harder problems even if the recruiter states otherwise.

• Ask clarifying questions early if hints seem repetitive or unclear.

Key Takeaways

Although I did not receive the offer, this interview process helped me identify areas for improvement. My key takeaways:

• Strengthen knowledge of hard-level data structures.

• Clarify expectations with the recruiter regarding difficulty levels.

• Improve behavioral responses with well-structured examples.

Advice for Aspirants:

For those preparing for Meta interviews:

• Focus on LeetCode Medium-Hard problems.

• Be prepared for unexpected difficulty levels.

• Clearly communicate thought processes during problem-solving.

With better preparation, I believe I can perform better in future attempts.