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Rakuten's Interview Process (2026)

Blog / Rakuten's Interview Process (2026)

Rakuten's software engineer interview process typically runs 3 to 4 stages and generally wraps up within 2 to 4 weeks, though the exact structure can vary by region and seniority level.

Recruiter Screen: A short phone or video call, usually around 15 to 30 minutes, covering your background, your interest in Rakuten, and salary expectations.
Online Coding Assessment: A timed assessment typically hosted on Codility, where you'll solve 2 to 3 algorithmic problems at roughly LeetCode Easy to Medium difficulty.
Technical Interview(s): One or two rounds with senior engineers or managers covering live coding, system design, and domain-specific topics like Java or React, usually around 60 minutes each.
Final Behavioral Round: A conversation with a Director or HR, focused on cultural alignment with Rakuten's principles (Rakuten Shugi), your long-term motivation, and soft skills.

To prepare effectively, focus your study plan across these key areas that Rakuten consistently tests:

Data Structures & Algorithms (DSA): Algorithmic problem-solving at Easy to Medium difficulty, with a strong focus on explaining your reasoning clearly.
System Design (High-Level Design): Scalability and architecture questions, often tied to real Rakuten services like Rakuten Ichiba or Rakuten Mobile.
Low-Level Design & OOP: Object-oriented design, design patterns, and language internals, with a notable emphasis on Java.
CS Fundamentals: Networking, database internals, and core computer science concepts that come up in technical rounds.
Behavioral & Cultural Fit: Questions aligned with Rakuten Shugi principles, team dynamics, and your motivation for joining the Rakuten ecosystem.

1. Data Structures & Algorithms (DSA)The Codility assessment and the first technical round focus on fundamentals, not complex competitive programming. Expect questions on array manipulation, string parsing, and hashmaps, with difficulty sitting comfortably in the Easy to Medium range.Recent candidates report that failing often came down to not being able to clearly explain how a hashmap works internally, not from getting the hard problems wrong. Being able to walk through your solution step by step is just as important as getting the right answer.Common topics include tries for prefix matching, interval merging, and binary search variations. Problems like Word Frequency Counter are a good indicator of the style you'll encounter, and working through our top 100 DSA questions will cover the majority of what comes up.For targeted practice, spend time on tries and intervals, as both have appeared in recent Rakuten coding rounds.

2. System Design (High-Level Design)System design questions appear mainly in the second technical round and are geared toward mid-to-senior candidates. Expect questions on designing a URL shortener, a notification system, or a product suggestion engine, often framed around actual Rakuten services.You'll also be asked to defend your architectural choices: why SQL over NoSQL for a given use case, how you'd handle load balancing, or how microservices fit into a scalable backend. Practicing with our High-Level Design case studies will help you get comfortable with this format.Rakuten also asks about HTTP/2 vs. HTTP/3 and DNS resolution in this context, so don't treat system design as purely architecture diagrams. For hands-on whiteboard practice, try our System Design practice tool to simulate drawing out your designs in real time.

3. Low-Level Design & OOPOOP principles come up frequently in the technical rounds, particularly for Java-focused roles. Expect questions on design patterns like Singleton, as well as questions that ask you to implement something from scratch, similar to Design LRU Cache.Java internals are a recurring theme: garbage collection, memory management, and the internal workings of Java 8 Streams and lazy evaluation all appeared in 2025 and 2026 candidate reports. Brush up on Low-Level Design practice to make sure your object-oriented thinking is sharp before the interview.

4. CS FundamentalsThe technical rounds at Rakuten regularly include questions that aren't strictly coding. A classic example is 'What happens when you type a URL into a browser?', which tests your understanding of DNS, HTTP, and the network stack end to end.Database knowledge also comes up, including indexing, query optimization, and when to choose SQL vs. NoSQL for specific use cases. Reviewing networking fundamentals and system design core concepts will give you solid footing for these questions.

5. Behavioral & Cultural FitThe final round at Rakuten is genuinely different from most tech companies. Interviewers focus heavily on Rakuten Shugi, the company's core principles, so reading the Rakuten Way beforehand is not optional. Be ready to speak to concepts like Omotenashi and 'Speed!! Speed!! Speed!!' with real examples from your experience.Some candidates also report being asked about their willingness to promote Rakuten Mobile SIM cards to friends and family, which is a real cultural screening question, not a joke. If you're applying for a Tokyo role, expect questions about your openness to learning Japanese and adapting to the 'Englishnization' policy.Structuring your answers using the STAR principle will help you stay focused and specific, especially when discussing past team conflicts or your reasons for wanting to join Rakuten. The Behavioral Interview Course is a practical way to prep for this round if behavioral questions aren't your strong suit.

ConclusionRakuten's process rewards candidates who know their fundamentals cold, can articulate their architectural decisions clearly, and show genuine alignment with Rakuten's culture. Start with the coding basics, layer in system design, and don't skip the cultural prep. Follow the Rakuten Interview Roadmap for a structured, stage-by-stage plan to get you from first application to offer.