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      Senior Software Engineer Interview

      Jan 26, 2026
      Anonymous interview candidate
      Barcelona
      No offer
      Neutral experience
      Average interview

      Application

      I interviewed at Delivery Hero (Barcelona)

      Interview

      It was over a month process, total 5 calls , recruiter, technical interview include leetcode simple problem, system design , hiring manager, bar raiser include leetcode and behavioral and some technical discussion

      Interview questions [1]

      Question 1

      Software architecture and design and quality and performance and what motivates me
      Answer question

      Other Senior Software Engineer interview reviews for Delivery Hero

      Senior Software Engineer Interview

      Feb 10, 2026
      Anonymous interview candidate
      Berlin
      No offer
      Negative experience
      Average interview

      Application

      I applied online. I interviewed at Delivery Hero (Berlin) in Feb 2026

      Interview

      The interview process consisted of an HR round, a coding round, and a system design round. The overall structure of the process was clear, and the interviewers were professional. However, my experience with the system design round was disappointing. System design is a core area of my expertise, and I felt I performed well within the one-hour time limit, covering requirements, trade-offs, and scalability considerations. Despite this, I received a rejection after 3–4 days with no detailed or actionable feedback. The lack of clarity around the evaluation criteria made the outcome feel somewhat unrealistic and difficult to learn from. Providing more specific feedback, especially for senior or system design–focused roles, would greatly improve the candidate experience. Suggestion for Improvement: More transparent feedback and clearer expectations for the system design round would help candidates better understand the decision-making process.

      Interview questions [1]

      Question 1

      A very simple online food delivery use cases to design
      Answer question
      1

      Senior Software Engineer Interview

      Jan 30, 2026
      Anonymous interview candidate
      Berlin
      No offer
      Negative experience
      Easy interview

      Application

      I applied online. I interviewed at Delivery Hero (Berlin) in Nov 2025

      Interview

      I went through the Senior Engineer track, and frankly, it was one of the most inconsistent and poorly managed processes I’ve encountered. The "Success" Trap: I solved all three coding challenges perfectly, each in under 10 minutes. Because I was so efficient, we moved into System Design. I provided clear, senior-level signals across the board. Despite clearly acing the interview, I was dismissed with a lazy, meaningless “fit” rejection. In a single one-hour interview, I was drilled on three coding problems, Python fundamentals, and system design, and handled all of it successfully. When a candidate clears every technical hurdle thrown at them and still gets rejected without a single concrete or technical reason, it becomes obvious that the process is no longer about skill or competence. At that point, decisions are driven by subjective preference, gut feeling, or internal bias , not merit. Final Verdict: If you are a high-performing engineer who values logic and objective evaluation, look elsewhere. This team seems more interested in finding reasons to reject people than in recognizing actual talent. They will waste your time, and then provide a "fit" rejection because the interviewer likely felt threatened or simply decided they didn't like you personally, regardless of your perfect technical score. Advice to Management: Fix your scheduling systems and train your interviewers to use standardized rubrics. Rejecting a candidate who solves every problem in record time based on "gut feeling" is a surefire way to ensure you never hire top-tier senior talent.

      Interview questions [1]

      Question 1

      Intro Can you introduce yourself and your current role? What is your current tech stack? What kind of backend work do you primarily do? Can you talk about a recent major project you worked on? Why Flask or FastAPI? What were the scalability expectations for this system? What kind of traffic (RPS/RPM) were you expecting? How do you handle async or unpredictable workloads in your system? Framework & Design Decisions (Deep Dive) Why is Django a better fit for your use case than FastAPI? How does team size influence framework choice? How do you handle authentication and authorization? How did you migrate from single-tenant to multi-tenant? How do you ensure tenant isolation? What are the current bottlenecks or limits of your system? 3. Python Fundamentals What are *args and **kwargs in Python? What is the difference between positional and keyword arguments? What are decorators and why do we use them? Difference between iterators and generators? What is the Python GIL? How does multithreading work in Python? Does Python support true parallelism? 4. Coding 1.Find the maximum element in an array 2.Two Sum problem 3.Jump Game (can you reach the last index?) System Design (Triggered because I finished early) How would you design a service that needs to scale from 1k to 10k+ requests? How would you handle traffic spikes? Would you use a queue? Why? How does autoscaling fit into this design? How would you avoid losing requests? How would you design caching for this system? When would you use Redis vs database caching? How does geographic location affect caching? What role does CDN play here? How would you improve database performance? How do indexes work in PostgreSQL? What types of indexes are you aware of? How do you analyze slow queries? When would you consider NoSQL instead of PostgreSQL?
      1 Answer
      4

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