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      Data ML Engineer Interview

      15 Oct 2025
      Anonymous interview candidate
      Colombo, Western
      No offer
      Negative experience
      Difficult interview

      Application

      I applied online. I interviewed at Pearson (Colombo, Western) in Sept 2025

      Interview

      The interview process for the LLM and LangChain roles involved 3 rounds, which included technical assessments and behavioral interviews. The first round was a phone screening where they assessed my experience and motivation for the role. The second round was a technical interview, where I was asked to solve coding problems related to LangChain and RAG systems, focusing on LLMs, data pipelines, and AI system design. The third round was a behavioral interview where I discussed my past work experience, problem-solving skills, and how I collaborate with teams. However, after the third round, I did not receive any further communication, despite calling and chasing for updates. It was frustrating to not receive any notifications or feedback after multiple follow-ups.

      Interview questions [1]

      Question 1

      In the technical interview, the one key question they asked me was to explain how I would design a RAG (Retrieval-Augmented Generation) system using LangChain and LLMs. They wanted to know my approach to building scalable data pipelines, how I would handle large datasets, and how I would integrate different sources of information into a coherent AI-driven solution. It was a challenging question that tested both my technical depth and understanding of system architecture.
      Answer question
      2