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CoinDCX Interview Preparation

Medium-Hard

Fintech / Cryptocurrency Exchange · Mumbai

CoinDCX is a Fintech / Cryptocurrency Exchange company headquartered in Mumbai, Maharashtra, hiring interns and freshers across India.

280+ questions4 rounds5 expert tipshttps://coindcx.com/

About CoinDCX

**CoinDCX — company profile** CoinDCX is a Mumbai, Maharashtra-headquartered cryptocurrency exchange founded in 2018 by Sumit Gupta (CEO) and Neeraj Khandelwal, IIT classmates who pooled their savings and launched the company from a flat in Mumbai. It operates as a crypto exchange and trading service provider, and describes itself as India's most valued crypto investment app and the country's preferred crypto exchange. Its stated positioning is simplifying crypto access for mainstream Indian retail investors, and its own material claims over 2 crore (20 million) registered users. The wider DCX Group serves over 20 million users across India and the UAE, reporting annualised revenues exceeding ₹1,179 crore and assets under custody of over ₹10,000 crore. Beyond the core exchange, the group runs CoinDCX Ventures, an investment arm backing Web3 startups, and Okto, a Web3 wallet product reported at 20 million+ users. It expanded internationally into the Middle East and North Africa by acquiring the Dubai-based exchange BitOasis. CoinDCX became India's first crypto unicorn, reaching a $1.1 billion valuation after a $90 million Series C led by B Capital with participation from Coinbase Ventures and Polychain Capital. Company databases report roughly $247 million raised in total from investors including Polychain, Bain Capital Ventures, Coinbase and Pantera Capital, at a current valuation around $2.45 billion, making it a Series D company. Its careers site indicates offices in Bengaluru, Mumbai and Delhi, and hosts sections covering its openings and a 'Life At CoinDCX' culture page emphasising employee experience. Co-founder Sumit Gupta has been one of the more public advocates for regulatory clarity for Indian crypto, and the company operates under India's FIU registration regime. **Industry:** Fintech / Cryptocurrency Exchange **Headquarters:** Mumbai, Maharashtra, India **Official website:** https://coindcx.com/ **Why work here as a fresher** CoinDCX is the kind of company where early-career talent is given real scope rather than busywork. Interns and freshers are placed on live problems, paired with experienced mentors, and reviewed on the same quality bar as everyone else. That combination — real ownership plus real feedback — is what turns a first role into a genuine career head start. **Culture** Expect a fast-paced, outcome-oriented environment with flat communication, short feedback loops and a strong bias for action. Teams are small enough that your contribution is visible and large enough that you learn from people who have already solved the problem you are facing. Learning, curiosity and honest debate are valued over hierarchy. **Growth & hiring** CoinDCX hires internships across engineering, data, product, design, marketing, finance and operations, and a meaningful share of its early-career hires convert to full-time offers. All openings are published on the company's official careers page, and applications for this role are submitted directly to CoinDCX there — no middlemen, no aggregators. Visit the official website link below to explore CoinDCX's products, leadership, newsroom and full list of current openings.

Interview Rounds4

1
Online Assessment60–90 min

2–3 DSA coding problems on HackerRank, CodeSignal, or company platform

2
Technical Interview I45–60 min

Data structures & algorithms — arrays, trees, graphs, dynamic programming

3
Technical Interview II45–60 min

System design or low-level design — scalability, APIs, databases

4
HR / Culture Round30 min

Career goals, teamwork, strengths/weaknesses, role expectations

Practice Questions10

Key Topics

  • Data Structures & Algorithms150q
  • System Design50q
  • Object-Oriented Design40q
  • SQL & Databases25q
  • CS Fundamentals (OS, Networking)25q

Expert Tips

  • Practice LeetCode easy and medium problems before the OA — focus on arrays, strings, trees, and graphs.
  • For system design, use the RESHADED framework: Requirements, Estimation, Storage, High-level design, APIs, Detailed design, Evaluation.
  • Prepare 3–4 STAR stories covering: a challenge you solved, a time you worked in a team, a project you owned end-to-end.
  • After every coding solution, proactively state the time and space complexity — interviewers expect it.
  • Study common CS fundamentals: process vs thread, TCP vs UDP, REST vs GraphQL, SQL indexing, CAP theorem.