Unthinkable Solutions Interview Experience for Software Developer
Candidate Information

Status: Final-year student, seeking full-time opportunities

Experience: Academic + Internship projects (MERN stack, DSA practice)

Target Position: Software Engineer (Entry-level)

Location: Gurgaon, Haryana, India

Interview Date: 13 September 2025

Overview of Interview Process
Round 1: Online Assessment (Eliminatory)

Duration: 90 minutes

Method: Onsite at Gurgaon (company’s in-house sandbox platform)

Focus Areas: Data Structures & Algorithms (Strings, Dynamic Programming, Backtracking, Bitmasking)

Key Questions:

Dynamic Programming (Hard): LeetCode 97 – Interleaving String

Concept tested: 2D DP with memoization to check if two strings interleave to form a third.

Backtracking / Greedy: LeetCode – Broken Calculator

Concept tested: Working backwards from Y → X using division and increment operations efficiently.

String + HashMap + Bitmasking: LeetCode 318 – Maximum Product of Word Lengths

Concept tested: Hashing + bitmask optimization to check for common characters between words.

Difficulty Assessment:

Q1: Hard

Q2 & Q3: Medium

Dynamic Programming (Hard): LeetCode 97 –https://leetcode.com/problems/interleaving-string/

Backtracking / Greedy: LeetCode – https://leetcode.com/problems/broken-calculator/description/

String + HashMap + Bitmasking: LeetCode 318 – https://leetcode.com/problems/maximum-product-of-word-lengths/description/

Obstacles Faced:

The sandbox compiler crashed frequently, auto-refreshing and erasing progress.

The only suggestion given was “refresh again”, which did not resolve the issue.

As a result, I was able to submit Q1 fully, but not Q2 and Q3 despite having working approaches.

Further Rounds (Managerial/Technical/HR)

Mentioned as part of the selection process, but I could not proceed beyond Round 1 due to its eliminatory structure.

The company conducts 6 rounds in total (all eliminatory).

Post-Interview Reflections

Company Culture Insights:
The process seemed rigid and evaluation-centric, with less attention to candidate comfort or fairness.

Work Environment:
All rounds were conducted onsite at Gurgaon. Candidates had to arrange travel themselves, with no reimbursement or support.

Benefits Highlight:

Packages offered: 5, 6, 8, and 10 LPA (performance-based).

No additional perks or benefits discussed in early rounds.

Evaluator Feedback:
No direct feedback was provided since Round 1 was fully eliminatory.

Suggestions for Improvement:

Ensure reliable, stable coding platforms (frequent crashes damage candidate experience).

Provide on-site technical support staff during assessments.

Align difficulty of Round 1 questions with the compensation structure.

Offer at least minimal feedback so candidates know where they stand.

Additional Information

Timeline: Applied via referral → Round 1 conducted within 2 weeks.

Next Steps: Did not advance due to submission issues caused by platform instability.

Travel: Candidates were required to travel to Gurgaon at their own expense.

Closing Note

The difficulty level of Round 1 was comparable to top product-based companies (Amazon, Adobe, Microsoft), but the candidate experience was disappointing due to platform instability.

If you are preparing for Unthinkable Solutions, be ready for:

Dynamic Programming (Hard)

Backtracking/Greedy

String + HashMap/Bitmasking

And most importantly — be prepared to handle technical glitches during the test.