# Software Engineer
**Role:** Software Engineer · **Level:** Authorized Officer
**Company:** [UBS](https://scaleengineer.com/companies/ubs)
**Difficulty:** Medium to Hard
**Salary:** US$110000 - US$150000
**Experience:** 4 - 7
**Timeline:** ~14 days
This interview process is for the Software Engineer role at the Authorized Officer level at UBS. It is designed to assess a candidate's technical skills, problem-solving abilities, and cultural fit within the organization.
Canonical: https://scaleengineer.com/interviews/ubs/authorized-officer-software-engineer
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## Overall evaluation

- Technical Aptitude
- Communication Skills
- Behavioral and Cultural Fit

## Questions asked

- Tell me about yourself.
- Why are you interested in this role at UBS?
- Describe a challenging project you worked on and how you overcame it.
- How do you handle working under pressure or tight deadlines?
- What are your strengths and weaknesses?
- Design a system for [specific problem, e.g., a ride-sharing service].
- Write code to solve [specific algorithm problem, e.g., find the kth largest element in an array].
- How would you ensure the scalability and reliability of a financial trading platform?
- Describe a time you disagreed with a team member or manager. How did you resolve it?
- What are your thoughts on microservices architecture?
- How do you stay updated with new technologies?
- What are your career aspirations for the next 5 years?

## Preparation tips

### lists

- Thoroughly review your resume and be prepared to discuss every project in detail.
- Practice coding problems on platforms like LeetCode, HackerRank, focusing on data structures and algorithms.
- Study system design principles and common architectural patterns.
- Understand the Software Development Life Cycle (SDLC) and Agile methodologies.
- Research UBS's business, values, and recent news.
- Prepare examples for behavioral questions using the STAR method (Situation, Task, Action, Result).
- Be ready to discuss your career goals and why you are interested in UBS.

### studyPlan

- {"title":"Data Structures and Algorithms","longDescription":"Weeks 1-2: Focus on core data structures (Arrays, Linked Lists, Trees, Graphs, Hash Tables) and algorithms (Sorting, Searching, Dynamic Programming, Greedy Algorithms). Practice coding these in your preferred language. Review Big O notation for time and space complexity.","shortDescription":"Weeks 1-2: Data Structures & Algorithms (DSA) fundamentals. Practice coding."}
- {"title":"System Design","longDescription":"Weeks 3-4: Dive into system design concepts. Study topics like scalability, availability, reliability, databases (SQL vs. NoSQL), caching, load balancing, message queues, and API design. Practice designing common systems like Twitter feed, URL shortener, etc.","shortDescription":"Weeks 3-4: System Design principles and practice."}
- {"title":"Behavioral and Company Research","longDescription":"Week 5: Prepare for behavioral questions. Reflect on past experiences related to teamwork, leadership, conflict resolution, handling failure, and dealing with ambiguity. Use the STAR method to structure your answers. Also, research UBS's values and mission.","shortDescription":"Week 5: Behavioral questions preparation and UBS research."}
- {"title":"Mock Interviews and Final Review","longDescription":"Week 6: Mock interviews. Practice with peers or mentors to simulate the interview environment. Focus on articulating your thoughts clearly and managing your time effectively. Review any specific technologies mentioned in the job description.","shortDescription":"Week 6: Mock interviews and final review."}

## Location differences

- {"location":"Zurich","differences":{"tips":["Research UBS's presence and operations in this specific region.","Be prepared to discuss how your technical skills can address regional market needs.","Familiarize yourself with any local financial regulations that might be relevant."],"interviewFocus":["Emphasis on practical application of knowledge in financial systems.","Understanding of regulatory compliance and its impact on software development.","Experience with specific financial technologies or platforms used in the region."],"commonQuestions":["How would you handle a large-scale data migration project?","Describe a time you had to optimize a slow-performing application. What steps did you take?","What are your thoughts on the current trends in cloud computing and how might they impact financial services?","Discuss a complex technical challenge you faced in a previous role and how you overcame it."]}}
- {"location":"London","differences":{"tips":["Understand UBS's global trading operations and technology stack.","Be ready to discuss your experience with high-frequency trading or similar domains.","Highlight any contributions to open-source projects relevant to financial technology."],"interviewFocus":["Deep dive into distributed systems and concurrency.","Focus on performance optimization and scalability for trading platforms.","Experience with low-latency systems and real-time data processing."],"commonQuestions":["How do you approach designing a distributed system for high-frequency trading?","Explain the trade-offs between different caching strategies for a real-time analytics platform.","What are the key considerations when building microservices for a banking application?","Describe your experience with performance tuning in a high-throughput environment."]}}
- {"location":"New York","differences":{"tips":["Research UBS's digital transformation initiatives.","Be prepared to discuss your experience with cloud technologies and cybersecurity frameworks.","Highlight projects involving mobile applications or digital banking solutions."],"interviewFocus":["Emphasis on cybersecurity and data protection.","Experience with modern development practices (Agile, DevOps).","Understanding of cloud platforms (AWS, Azure, GCP) and their application in finance."],"commonQuestions":["How would you design a secure authentication system for a mobile banking application?","Discuss your experience with cloud-native architectures and CI/CD pipelines.","What are the best practices for ensuring data privacy and security in financial applications?","Describe a project where you had to integrate with legacy banking systems."]}}

## Round 1: Coding and Algorithms Assessment
**Type:** Technical Interview - Data Structures and Algorithms · **Difficulty:** Hard · **Duration:** 60 min
Coding challenge focusing on DSA and problem-solving.
This round focuses on your core technical skills. You will be asked to solve one or two coding problems, typically involving data structures and algorithms. The interviewer will assess your ability to write clean, efficient, and correct code, as well as your thought process in arriving at the solution. Expect questions that test your understanding of complexity analysis and how to optimize solutions.
**Interviewers look for:** Strong grasp of data structures and algorithms.; Ability to translate requirements into working code.; Logical thinking and systematic approach to problem-solving.; Understanding of time and space complexity.; Clean and maintainable code.
**Evaluation criteria:** Correctness of the solution; Efficiency of the solution (time and space complexity); Code quality and readability; Problem-solving approach; Ability to explain the solution
**Common rejection reasons:** Inability to articulate thought process during coding.; Incorrect or inefficient algorithmic solutions.; Lack of understanding of fundamental data structures.; Poorly designed system architecture.; Inability to handle edge cases.
## Questions

- Given a binary tree, find its inorder traversal.
- Implement a function to find the median of a stream of numbers.
- Given an array of integers, find the contiguous subarray with the largest sum.

## Preparation tips

- Practice coding on a whiteboard or a shared editor.
- Think out loud and explain your approach before coding.
- Test your code with various inputs, including edge cases.
- Be prepared to discuss alternative solutions and their trade-offs.

## Round 2: System Design and Architecture
**Type:** Technical Interview - System Design · **Difficulty:** Hard · **Duration:** 60 min
Design a scalable and reliable system for a given problem.
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 system to solve it. This could involve designing a social media feed, a URL shortener, or a distributed key-value store. The focus is on your understanding of distributed systems, scalability, reliability, and trade-offs.
**Interviewers look for:** Ability to design complex, scalable, and reliable systems.; Understanding of architectural patterns.; Knowledge of databases, caching, and messaging systems.; Ability to handle trade-offs and make informed decisions.; Consideration of non-functional requirements (performance, security, maintainability).
**Evaluation criteria:** Scalability of the proposed design.; Reliability and fault tolerance.; Trade-offs considered in design choices.; Clarity and completeness of the architecture.; Understanding of distributed systems concepts.
**Common rejection reasons:** Lack of clarity in system design.; Failure to consider scalability and reliability.; Ignoring potential bottlenecks or failure points.; Not addressing security or data consistency concerns.; Inability to justify design choices.
## Questions

- Design a system like Twitter's news feed.
- Design a URL shortening service like Bitly.
- Design a distributed rate limiter.

## Preparation tips

- Practice designing common systems.
- Break down the problem into smaller components.
- Discuss potential bottlenecks and how to address them.
- Consider different database choices and their implications.
- Think about caching strategies and load balancing.

## Round 3: Behavioral and Fit Interview
**Type:** Behavioral Interview · **Difficulty:** Medium · **Duration:** 45 min
Assesses behavioral competencies, teamwork, and cultural fit.
This round focuses on your behavioral aspects and cultural fit. You will be asked questions about your past experiences, how you handle certain situations, your strengths and weaknesses, and your motivations. The interviewer wants to understand how you work in a team, how you approach challenges, and whether you align with UBS's values.
**Interviewers look for:** Evidence of teamwork and collaboration.; Examples of leadership and initiative.; Problem-solving skills in real-world scenarios.; Alignment with UBS's values and culture.; Passion for technology and the financial industry.
**Evaluation criteria:** Behavioral competencies (teamwork, leadership, problem-solving).; Cultural fit with UBS.; Motivation and career goals.; Past experiences and achievements.; Communication and interpersonal skills.
**Common rejection reasons:** Lack of specific examples to support claims.; Inability to articulate past experiences clearly.; Poor alignment with UBS values.; Negative attitude or lack of enthusiasm.; Difficulty collaborating or working in a team.
## Questions

- Tell me about a time you had to work with a difficult colleague. How did you handle it?
- Describe a situation where you failed. What did you learn from it?
- How do you prioritize your work when you have multiple competing deadlines?
- What are you passionate about outside of work?

## Preparation tips

- Prepare specific examples using the STAR method.
- Be honest and authentic in your responses.
- Show enthusiasm for the role and the company.
- Ask thoughtful questions about the team and the work environment.