Senior Software Engineer (Backend - Payments & Architecture)

As a Senior Software Engineer at OKTO, your key responsibilities will include designing and architecting complex distributed systems to facilitate real-time financial transactions, leading the integration of various payment platforms, and transitioning to a microservices architecture. Additionally, you'll write high-quality optimized code, mentor junior developers, and collaborate with cross-functional teams, ensuring best practices are followed. Your role is vital in driving continuous improvement and optimizing our development lifecycle.

To succeed as a Senior Software Engineer (Backend - Payments & Architecture) at OKTO, candidates need at least 7 years of backend software development experience, including 3 years in a leadership role. Key skills include proficiency in Java 11+, Spring Boot, AWS cloud services, and a strong understanding of payment flows and security mechanisms. Additionally, expertise in microservices architecture, RESTful APIs, and database management is crucial for this position.

OKTO fosters a friendly, motivating, and challenging environment for its Senior Software Engineers. Employees can expect a collaborative workplace that prioritizes continuous learning, skill development, and structured feedback. The company promotes a healthy work-life balance with flexible work-from-home options, creating an ideal setting for career advancement and personal growth.

Yes, there are significant opportunities for career advancement for Senior Software Engineers at OKTO. The company invests in your growth through continuous training, structured performance reviews, and feedback to help you reach your career goals. Whether you aspire to take on more technical leadership or explore new areas within software development, OKTO supports your ambitions.

Ideal qualifications for a Senior Software Engineer at OKTO include a Bachelor’s or Master’s degree in Computer Engineering or a related field, alongside substantial professional experience in backend software development and team leadership. A deep knowledge of Java, cloud services, and transaction processing is also essential, while strong technical writing skills and the ability to communicate complex concepts effectively can set candidates apart.

Discuss your specific experiences with designing and implementing microservices, focusing on the architecture principles you've used and the challenges you've faced. Share successful outcomes, such as improved scalability or reduced downtime, and how you collaborated with teams to achieve these results.

Explain your approach to security, including using secure coding standards, encryption methods, and continuous testing. Share examples of how you've implemented security best practices in previous projects, and describe how you stay updated with the latest threats and security technologies.

Discuss specific strategies you've implemented in past projects, such as database indexing, caching solutions, or load balancing techniques. Provide examples where these optimizations led to measurable improvements, and explain how you monitor system performance.

Share your philosophy on leadership and mentorship, focusing on how you guide junior developers through hands-on coding, code reviews, and knowledge sharing. Highlight any successful initiatives you've led to build team skills or improve performance.

Detail a specific technical challenge you've encountered, the methodologies you applied to resolve it, and the ultimate outcome. Emphasize communication and teamwork, especially if others were involved in finding a solution.

Explain your process for prioritizing tasks, using tools or methodologies like Agile or Kanban. Share how you ensure deadlines are met while maintaining code quality and staff productivity, particularly in fast-paced environments.

Detail your experiences with AWS tools like EC2, S3, and Lambda, highlighting specific projects where you’ve utilized these services. Discuss any challenges you encountered and how you addressed them, showcasing your ability to innovate.

Discuss your testing strategies, including unit testing, integration testing, and how you incorporate automated testing tools into your workflow. Emphasize how these strategies lead to higher code quality and reduced production issues.

Reflect on the critical role that APIs play in payment systems, focusing on aspects like integration with third-party services, security measures, and scalability. Use past experiences to illustrate how well-designed APIs can enhance a payment product.

Share your passion for software development, citing specific aspects like solving complex problems, collaborating with teams, or creating innovative solutions. Convey how your motivation aligns with the goals of OKTO and its commitment to cutting-edge technologies.