Sr. Java SW Engineer - job 3 of 6

As a Sr. Java Software Engineer at Visa, you'll take charge of designing and developing scalable systems that support our mission of secure payments. Your responsibilities will include building and deploying modern services, engaging in the full software development life cycle, collaborating with multi-functional teams to create software solutions, and contributing to product quality improvements. With a focus on payment security and leveraging innovative technologies, you’ll actively shape the future of monetary transactions.

To qualify as a Sr. Java Software Engineer at Visa, you'll need a minimum of 3 years of work experience with a Bachelor's degree or over 2 years with an advanced degree. Proficiency in Java programming, Spring Boot, and RESTful web services is essential. You should have a strong grasp of microservices architectures, API development, and best coding practices, including TDD/BDD. Familiarity with container orchestration technologies like Docker and Kubernetes is preferred, alongside a good understanding of CI/CD processes.

A typical day as a Sr. Java Software Engineer at Visa involves collaborating with your agile team to address technical challenges, participate in design discussions, and develop code that meets our high standards for quality and security. You’ll engage in both individual and team activities, which might involve writing and reviewing code, developing APIs, and discussing how to optimize our systems while focusing on scalability and performance. Continuous improvement through mentorship and knowledge-sharing is a fundamental aspect of your daily work.

A successful Sr. Java Software Engineer at Visa should be well-versed in Java and Spring Boot for back-end development. Additionally, knowledge of RESTful APIs and microservices architecture is crucial. Familiarity with container orchestration tools like Docker and Kubernetes will be beneficial. Understanding of modern development practices, including continuous integration and continuous deployment (CI/CD), coupled with clean code principles, is essential to thrive in this dynamic environment.

At Visa, personal and professional growth are paramount. As a Sr. Java Software Engineer, you will have access to ongoing mentorship and learning opportunities, including participation in workshops, conferences, and collaborative projects. The company promotes a culture of innovation and continuous improvement, allowing you to tackle complex challenges that enhance your skill set and broaden your professional horizons while contributing meaningfully to impactful projects.

To ensure code quality and reliability in Java applications, I apply test-driven development (TDD) and behavior-driven development (BDD) practices. This involves writing comprehensive unit and integration tests before coding to define expected functionalities. Additionally, I follow clean code principles, such as SOLID and DRY, ensuring that my code is maintainable, readable, and scalable.

In my previous projects, I've extensively utilized Spring Boot to create robust and scalable microservices. I appreciate its rapid development capabilities and built-in features such as dependency injection and security configurations, which streamline the creation of RESTful services. Using Spring Boot has significantly improved my productivity and ensured consistent implementations across various services.

When troubleshooting software bugs, I start by replicating the issue in a controlled environment. Utilizing logging and debugging tools, I carefully trace the error source. I follow a systematic approach, verifying assumptions, analyzing stack traces, and reviewing code paths until I identify the root cause. Additionally, I make use of peer reviews to gain perspective on potential overlooked areas in the code.

I have extensive experience with RESTful web services, focusing on creating APIs that are stateless and that conform to REST principles. Best practices I follow include using meaningful resource URIs, implementing proper status codes, leveraging appropriate HTTP methods, and ensuring that APIs are well-documented. I also prioritize the use of versioning to maintain backward compatibility.

I have practical experience using Docker for containerization, allowing applications to run consistently across different environments. I have also worked with Kubernetes for orchestration, managing clusters, and automating deployment workflows. This experience has helped me develop an understanding of microservices architecture and the scalability it offers, enhancing the resilience of the applications I develop.

Handling tight deadlines while maintaining quality involves effective planning and prioritization. I break tasks into manageable components and apply Agile methodologies to stay flexible with changing requirements. Communication within my team is crucial, enabling us to align on objectives and address any potential roadblocks collaboratively. I also emphasize code reviews and automated testing to ensure that quality remains a priority even under time constraints.

One challenging project involved integrating multiple payment gateways into a single system while ensuring transaction security. I faced issues with differing APIs and varied response times. I overcame these by developing a robust wrapper layer to standardize communications and implementing caching strategies to enhance performance and reliability. Additionally, close collaboration with stakeholders helped refine requirements and pivot strategies effectively.

Documentation is crucial in software development as it preserves knowledge and ensures maintainability. I prioritize documenting code, APIs, and system architecture clearly, which aids both current team members and future developers. Good documentation supports onboarding new engineers and serves as a reference during debugging, ultimately contributing to increased project efficiency.

I stay updated on the latest trends in Java and software engineering by following industry leaders, reading technical blogs, participating in online forums, and attending conferences regularly. I also engage in continued learning through courses and workshops that focus on emerging technologies and methodologies, ensuring that my skills are always aligned with best practices in the tech industry.

Collaboration is at the heart of my work as a Sr. Java Software Engineer. It fosters innovation, enhances problem-solving capabilities, and provides diverse perspectives. I actively engage with cross-functional teams to discuss design artifacts and share insights. By leveraging team strengths, we create better solutions collectively, ensuring that the software evolves in accordance with user needs and business goals.