# Software Engineer **Role:** Software Engineer · **Level:** G **Company:** [BP](https://scaleengineer.com/companies/bp) **Difficulty:** Medium to Hard **Salary:** US$110000 - US$150000 **Experience:** 3 - 7 **Timeline:** ~14 days This interview process is for a Software Engineer role at BP at the G level. It is designed to assess technical skills, problem-solving abilities, and cultural fit within the company. Canonical: https://scaleengineer.com/interviews/bp/g-software-engineer --- ## Overall evaluation - Technical Aptitude - Communication and Collaboration - Behavioral and Cultural Fit ## Questions asked - Describe a complex technical challenge you faced and how you overcame it. - How would you design a URL shortening service? - What are the trade-offs between SQL and NoSQL databases? - Tell me about a time you disagreed with a team member. How did you resolve it? - Write a function to find the kth largest element in an unsorted array. - How do you ensure code quality and maintainability? - What is your experience with cloud computing platforms? - Describe a project you are particularly proud of and your role in it. - How do you handle tight deadlines and pressure? - Explain the concept of RESTful APIs. ## Preparation tips ### lists - Review fundamental computer science concepts (data structures, algorithms, operating systems, databases). - Practice coding problems on platforms like LeetCode, HackerRank, or similar. - Understand common software design patterns and principles (SOLID, DRY, KISS). - Prepare to discuss your past projects in detail, focusing on your contributions and the challenges faced. - Research BP's mission, values, and recent technological initiatives. - Prepare questions to ask the interviewer about the role, team, and company culture. ### studyPlan - {"title":"Data Structures and Algorithms","longDescription":"Weeks 1-2: Focus on Data Structures and Algorithms. Cover arrays, linked lists, trees, graphs, hash tables, sorting, searching, and dynamic programming. Practice at least 5-10 problems per topic.","shortDescription":"Weeks 1-2: DSA fundamentals and practice."} - {"title":"System Design","longDescription":"Weeks 3-4: System Design and Architecture. Study concepts like scalability, availability, reliability, databases (SQL vs NoSQL), caching, load balancing, and microservices. Review common system design interview questions.","shortDescription":"Weeks 3-4: System Design principles and patterns."} - {"title":"Behavioral Preparation","longDescription":"Week 5: Behavioral and Situational Questions. Prepare STAR method (Situation, Task, Action, Result) answers for common behavioral questions related to teamwork, leadership, problem-solving, and handling conflict. Reflect on your past experiences.","shortDescription":"Week 5: Behavioral questions and STAR method."} - {"title":"Final Preparation","longDescription":"Week 6: Company Research and Mock Interviews. Deep dive into BP's business, values, and recent news. Conduct mock interviews with peers or mentors to simulate the interview environment and get feedback.","shortDescription":"Week 6: BP research and mock interviews."} ## Location differences - {"location":"London, UK","differences":{"tips":["Research BP's operations and projects in this specific region.","Be prepared to discuss how your skills align with local business needs.","Highlight any experience working with diverse, international teams."],"interviewFocus":["Understanding of local market technology trends.","Adaptability to regional work culture.","Familiarity with specific regional compliance or regulations."],"commonQuestions":["Tell me about a time you had to deal with a legacy system.","How do you approach code reviews?","Describe a challenging technical problem you solved recently."]}} - {"location":"Houston, USA","differences":{"tips":["Emphasize projects involving high availability and performance.","Be ready to discuss your contributions to open-source projects if applicable.","Showcase your understanding of modern software development lifecycles."],"interviewFocus":["Proficiency in distributed systems and cloud-native development.","Experience with large-scale data processing.","Agile methodologies and CI/CD practices."],"commonQuestions":["How do you ensure scalability in your code?","Describe your experience with cloud platforms (AWS, Azure, GCP).","What are your thoughts on microservices architecture?"]}} ## Round 1: Technical Screening **Type:** Technical Screening (Coding) · **Difficulty:** Medium · **Duration:** 45 min Coding assessment focusing on data structures and algorithms. This initial round focuses on assessing your foundational technical skills. You will be asked to solve coding problems, typically involving data structures and algorithms. The interviewer will evaluate your problem-solving approach, coding style, and understanding of fundamental computer science concepts. Expect to explain your thought process and justify your solutions. **Interviewers look for:** Clear and structured approach to problem-solving.; Ability to write clean, efficient, and correct code.; Understanding of time and space complexity.; Good communication of thought process. **Evaluation criteria:** Problem-solving approach; Coding proficiency; Understanding of data structures and algorithms; Logical thinking **Common rejection reasons:** Inability to articulate thought process.; Poor understanding of fundamental data structures and algorithms.; Difficulty in solving basic coding problems.; Lack of clarity in communication. ## Questions - Given an array of integers, return indices of the two numbers such that they add up to a specific target. - Reverse a linked list. - Find the middle element of a linked list. ## Preparation tips - Practice coding problems focusing on common data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming). - Be comfortable explaining your code and its complexity (Big O notation). - Practice writing code on a whiteboard or in a shared editor without relying on IDE features. ## Round 2: System Design Interview **Type:** System Design · **Difficulty:** Hard · **Duration:** 60 min Design a scalable software system. This round assesses your ability to design and architect software systems. You will be presented with a high-level problem and asked to design a scalable, reliable, and maintainable solution. This involves discussing data models, APIs, system components, and potential bottlenecks. Focus on demonstrating your understanding of distributed systems and architectural patterns. **Interviewers look for:** Ability to design complex systems from scratch.; Understanding of distributed systems concepts (e.g., consistency, availability).; Knowledge of various architectural patterns.; Ability to justify design choices and discuss trade-offs. **Evaluation criteria:** System design principles; Scalability and performance considerations; Trade-off analysis; Database design; API design **Common rejection reasons:** Inability to design scalable and robust systems.; Poor understanding of trade-offs in system design.; Lack of experience with distributed systems concepts.; Difficulty in handling ambiguity in requirements. ## Questions - Design a system like Twitter's news feed. - Design a rate limiter. - How would you design an API for a ride-sharing service? ## Preparation tips - Study common system design patterns (e.g., load balancing, caching, message queues, database sharding). - Practice designing well-known systems like Twitter feed, URL shortener, or a distributed cache. - Be prepared to discuss trade-offs between different design choices. - Understand concepts related to scalability, availability, and fault tolerance. ## Round 3: Behavioral and Managerial Interview **Type:** Behavioral Interview · **Difficulty:** Medium · **Duration:** 45 min Assessing behavioral competencies and cultural fit. This round focuses on your behavioral and situational responses. You'll be asked questions about your past experiences, how you handle challenges, work in teams, and your motivations. The goal is to understand your work style, problem-solving approach in real-world scenarios, and how well you align with BP's culture and values. Use the STAR method to structure your answers. **Interviewers look for:** Evidence of collaboration and teamwork.; Ability to learn from past experiences.; Alignment with BP's core values.; Enthusiasm for the role and company. **Evaluation criteria:** Teamwork and collaboration; Problem-solving approach in past experiences; Adaptability and learning agility; Cultural fit with BP values; Motivation and career goals **Common rejection reasons:** Lack of alignment with company values.; Poor communication or interpersonal skills.; Inability to provide specific examples for behavioral questions.; Negative attitude or lack of enthusiasm. ## Questions - Tell me about a time you failed. What did you learn from it? - Describe a situation where you had to work with a difficult colleague. How did you handle it? - Why are you interested in working at BP? ## Preparation tips - Prepare specific examples using the STAR method for common behavioral questions (teamwork, leadership, conflict resolution, failure, success). - Research BP's values and be ready to discuss how you embody them. - Think about your career aspirations and how this role fits into them. - Be prepared to ask thoughtful questions about the team and work environment.