Senior Backend Software Engineer

• →Architect, build, and optimize software systems for our ads management platform on AWS, using agentic AI-assisted development practices.
• →Develop product features and internal tools that improve customer experience and engineering productivity.
• →Partner with cross-functional stakeholders to design maintainable technical solutions.
• →Maintain and evolve core platform components with a focus on reliability, performance, and scalability.

• Bachelor's degree in Computer Science or a related field, or equivalent practical experience.
• 8+ years of professional software development experience, with strong proficiency in Java.
• Hands-on experience with agentic coding practices, prompt engineering, or structured interactions with AI coding assistants to streamline development workflows.
• Deep understanding of algorithms, data structures, object-oriented programming, concurrency, and distributed systems.
• Experience designing and developing RESTful APIs in UNIX/Linux environments.
• Experience with relational databases (e.g., MySQL, Oracle), cloud platforms (AWS strongly preferred, or GCP), and container technologies such as Docker.
• Hands-on experience with, or strong willingness to adopt, agentic AI coding tools and workflows to streamline development.

• Familiarity with React.js and Node.js.
• Programming proficiency in Python.
• Experience in data science or machine learning.
• Proficiency in Chinese.

• Excellent technical analysis, problem-solving, and communication skills.
• Proactive mindset with a strong sense of end-to-end ownership.
• Business-level Japanese and English, both spoken and written.

• Overlapping Hours: Engineering team are based in both Japan and the United States, this role requires working from 6:00 AM JST (Tuesday through Friday) to maintain sufficient overlapping hours with U.S. based colleagues. Mondays follow standard local working hours.
• Work Arrangement: This position is primarily remote (work-from-home), with occasional in-office meetings or team gatherings in Japan.

Boundless is proud to be an equal opportunity workplace. All qualified applicants will receive consideration for employment without regard to, and will not be discriminated against based on age, race, gender, color, religion, national origin, sexual orientation, gender identity, veteran status, disability or any other protected category. Yahoo will consider for employment qualified applicants with criminal histories in a manner consistent with applicable law. Yahoo is dedicated to providing an accessible environment for all candidates during the application process and for employees during their employment. If you need accessibility assistance and/or a reasonable accommodation due to a disability, please submit a request via the Accommodation Request Form (www.yahooinc.com/careers/contact-us.html) or call +1.866.772.3182. Requests and calls received for non-disability related issues, such as following up on an application, will not receive a response.

At Boundless, we know that diversity makes us stronger. We are committed to a collaborative, inclusive environment that encourages authenticity and fosters a sense of belonging. We strive for everyone to feel valued, connected, and empowered to reach their potential and contribute their best.

Yahoo has a high degree of flexibility around employee location and hybrid working. In fact, our flexible-hybrid approach to work is one of the things our employees rave about. Most roles don’t require specific regular patterns of in-person office attendance. If you join Yahoo, you may be asked to attend (or travel to attend) on-site work sessions, team-building, or other in-person events. When these occur, you’ll be given notice to make arrangements. 

If you’re curious about how this factors into this role, please discuss with the recruiter.