Sr. Java SW Engineer - job 5 of 6

To qualify for the Sr. Java Software Engineer position at Visa, candidates must possess 3+ years of relevant work experience, ideally coupled with a Bachelor's Degree or more than 2 years of experience with an advanced degree such as a Master's. Expertise in Java programming and experience with back-end development using Spring Boot are essential. Additionally, a solid understanding of RESTful web services, microservice architecture, and familiarity with Container Orchestration (Docker, Kubernetes) is required.

As a Senior Software Engineer at Visa, your responsibilities include designing, coding, and deploying scalable and reliable web applications. You will work as a key member of a cross-functional agile team focusing on payment security, and be involved in the entire development lifecycle from requirements definition to product delivery. This means you will actively contribute to product quality, create design artifacts, and develop best-in-class software solutions that meet Visa's technical standards.

In the Sr. Java Software Engineer role at Visa, you will have the opportunity to work with innovative technologies like Spring Boot for back-end development as well as RESTful web services. You'll also engage with various development methodologies including TDD and BDD, and be involved with Container Orchestration tools such as Docker and Kubernetes, enhancing your skills in application lifecycles and CI/CD practices.

Visa believes in mentorship and continued learning opportunities for their employees. As a Senior Software Engineer, you’ll have access to various professional development programs, workshops, and online courses that not only promote the enhancement of technical skills but also provide avenues for leadership growth and networking with industry experts.

The work environment for a Sr. Java Software Engineer at Visa in Warsaw is a hybrid one that encourages collaboration and innovation. You will be part of a dynamic team that values input and creativity while also embracing the flexibility of a hybrid setup. Expect a supportive atmosphere where you can work in the office as needed while enjoying the flexibility of remote work.

When answering this question, discuss specific Java frameworks you have worked with, such as Spring Boot. Highlight your role in past projects, the challenges you faced, and how the frameworks helped streamline development and improve application performance. Be prepared to explain your approach to coding standards and best practices you followed, illustrating your ability to deliver high-quality software.

To ensure code quality, I adhere to best practices such as writing unit tests and utilizing TDD or BDD methodologies. I make sure to follow clean coding principles like SOLID, KISS, and DRY. Discuss specific tools you use for version control and code reviews, and how collaboration with team members helps improve code quality through feedback.

When discussing debugging strategies, mention your systematic approach to identifying issues, including using logging and debugging tools. Share examples of specific bugs you have resolved, the process you followed to uncover the root causes, and any lessons learned to prevent similar issues in the future.

In your response, detail your experience in designing and developing RESTful APIs, including how you defined contracts between front-end and back-end services. Discuss how you ensured API security and performance, and share examples of successful integrations in previous projects, emphasizing your understanding of best practices.

When talking about task prioritization, describe the methods you use to assess tasks based on urgency and importance. Discuss your experience with agile methodologies and how you collaborate with team members to ensure the most critical tasks are completed first, adapting to changes as necessary to meet project goals.

For this question, provide insight into your understanding and experience with microservices. Talk about specific projects where you've implemented microservice architecture, the advantages of this approach, and any challenges you faced, along with how you overcame them to achieve a seamless integration of services.

Explain your proactive approach to staying updated in the evolving field of software development. Discuss resources like blogs, online courses, workshops, and conferences that you follow. Share any specific trends you find particularly interesting and how you have applied new knowledge in your work at Visa or in previous roles.

Describe your experiences working in agile environments, emphasizing your roles in sprint planning, retrospectives, and daily stand-ups. Share specific contributions you've made that helped the team overcome challenges or achieve project milestones, showcasing your ability to collaborate effectively with both technical and non-technical team members.

In your answer, discuss various performance optimization techniques you are familiar with, such as code refactoring, utilizing caching strategies, database optimizations, and load testing. Share examples of how these techniques improved the performance of applications you've worked on, highlighting the impact on user experience.

Share your strategies for managing stress and staying organized when deadlines are tight. Discuss how you prioritize tasks, communicate with your team, and maintain focus. Provide an example of a high-pressure situation you've faced and how you successfully met the deadline without compromising the quality of your work.