Soliton Technologies Fullstack Engineer Interview Questions
& Process

First, they screened my application based on my resume and skills. Then, I had an online coding test. After that, if I passed, I went through one or two technical interviews where they asked about data structures, algorithms, and problem-solving. There was also a role-specific or system design round. Finally, an HR interview checked my communication, behavior, and if I'd fit culturally before they made a decision and offered me the job.

So I had this interview at Soliton Technologies back in Feb 2026 through my college placement drive. It's a mid-sized company, about 25 years old, with around 400 employees, mostly focused on semiconductor testing and data management. The salary was around 8-10 LPA after a 1-year internship with a 25k/month stipend. The interview process went like this: Round 1 was a 1-hour common written test for everyone, non-MCQ, covering math, C programming (pointers included), circuit problems, OS (CPU scheduling esp. Round Robin), Computer Networks (propagation time), and Logic Gates/Semiconductors. The key here is showing your steps neatly, not just the answer. I did 6 questions. Round 2 was a short C programming round with 3 problems, you had to solve one to move to the next. I solved 2. Again, showing your thought process on paper was important. Round 3 & 4 were combined Technical and HR. They really check your resume - internships, projects, tech stack, and CS fundamentals. They might also ask you to solve problems you missed in Round 1. Don't panic, explain your thinking. Round 5 was a long C programming round, 3 problems, roughly 3 hours. You explain your approach first, then code. Questions were like Longest Palindrome, LIS. Again, showing your work on paper is crucial. A big issue for me here was a mentor who was short-tempered and didn't admit a test case error, which held me back while others with better mentors moved on. In the end, I was eliminated. Rounds 6 & 7 were Design and Essay writing, sort of like a GD, where you solve a real-world problem as a team, and then an essay. Preparation involves YouTube and school physics/maths. Be aware that some candidates get terminated post-internship with no job offer. For CS folks, their full-stack tech is C#, .Net, Angular, Node.js, but it's heavily tied to semiconductor testing, not typical app dev. No Java! They might use AI for data insights, leaning more towards ECE/EEE. That's my experience, good luck!

it was a face to face technical round and I got kicked out. it was a bit difficult than I expected, where data structures is very essential and C is the only language available to code.