Fullstack Sr Software Dev Engineer

Bachelor’s degree in Computer Science, a related technical field, or equivalent practical experience.

5–8 years of professional full-stack software engineering experience.

Strong hands-on engineering experience using Java for robust, secure backend services.

Experience building responsive, high-performance web applications using React.js, Node.js, JavaScript/TypeScript, and modern frameworks (e.g., Next.js).

Strong fundamentals in system design, RESTful APIs, distributed systems, and web security protocols.

Proven expertise in prompt engineering, context modeling, and structured interaction with AI development environments to build and refactor production-grade systems.

Demonstrated experience integrating AI-assisted developer tools (e.g., Cursor, Claude Code, GitHub Copilot) into day-to-day software development workflows.

Proven capability to critically evaluate, audit, and debug AI-generated outputs, ensuring the detection of errors, hallucinations, or security vulnerabilities.

Deep experience with testing frameworks, modern CI/CD pipelines, and maintaining high codebase standards.

Experience building or maintaining high-scale Identity and Access Management (IAM) systems, auth protocols (OAuth, OIDC, SAML), or web security standards.

Experience with CRM and CMS tool integrations.

Cloud platform experience (GCP, AWS) and infrastructure-as-code.

Familiarity with observability tools (Splunk, Grafana, DataDog) and client/server performance profiling.

Experience with structured development methodologies, such as Spec-Driven Development (SDD), API-first design, or AI-assisted diagnostic tools.

Exposure to web accessibility (WCAG) and internationalization (i18n)

Consistently deliver high-quality, high-impact features independently, ensuring secure and seamless experiences for hundreds of millions of users.

Masterfully leverage AI-assisted tools to significantly compress development lifecycles while maintaining an ultra-high bar for security compliance and test coverage.

Raise overall engineering standards by contributing to system architecture discussions, documenting clear technical specifications, and mentoring junior squad members.

Accelerate squad velocity by sharing innovative, repeatable ways to integrate AI workflows into daily development, testing, and troubleshooting activities

The material job duties and responsibilities of this role include those listed above as well as adhering to Yahoo policies; exercising sound judgment; working effectively, safely and inclusively with others; exhibiting trustworthiness and meeting expectations; and safeguarding business operations and brand integrity.

At Yahoo, we offer flexible hybrid work options that our employees love! While most roles don’t require regular office attendance, you may occasionally be asked to attend in-person events or team sessions. You’ll always get notice to make arrangements. Your recruiter will let you know if a specific job requires regular attendance at a Yahoo office or facility. If you have any questions about how this applies to the role, just ask the recruiter!

Yahoo 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.

We believe that a diverse and inclusive workplace strengthens Yahoo and deepens our relationships. When you support everyone to be their best selves, they spark discovery, innovation and creativity. Among other efforts, our 11 employee resource groups (ERGs) enhance a culture of belonging with programs, events and fellowship that help educate, support and create a workplace where all feel welcome.

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