Senior Full Stack Engineer, Key-Value Store & Messaging

It takes powerful technology to connect our brands and partners with an audience of hundreds of millions of people. Whether you're looking to write mobile app code, engineer the servers behind our massive ad tech stacks, or develop algorithms to help us process trillions of data points a day, what you do here will have a huge impact on our business—and the world.

At Yahoo, Cloud Runtime Engineering, a central technology organization, is driving a company-wide cloud and infrastructure transformation. The Key-Value Store & Messaging Platform team sits at the core of this effort.

You'll work on platforms that directly power Yahoo Mail, Finance, Sports, Media, and Ad Platforms, where performance, reliability, and scale are non‑negotiable. This is a hands‑on IC role offering real ownership, deep technical challenges, and company‑wide impact.

• Design, build, and operate high‑performance No
  
  SQL and messaging platforms at massive scale
• Own globally distributed production systems, with a focus on reliability, latency, and scalability
• Drive automation‑first engineering across CI/CD, testing, provisioning, scaling, and operations
• Solve complex systems problems using sound engineering judgment and modern technologies
• Participate actively in architecture, design reviews, and code reviews
• Partner with internal Yahoo teams to deliver platform capabilities that enable product innovation
• Mentor junior engineers and help raise the overall engineering bar
• Leverage AI‑driven insights and intelligent automation to optimize system performance, reliability, and operational efficiency

• Strong Java systems programming experience with solid testing and debugging skills
• Excellent fundamentals in data structures, algorithms, and distributed systems
• Proven ability to operate and improve large‑scale production systems
• Strong analytical thinking, problem‑solving skills, and a clear ownership mindset
• Effective communication and collaboration skills across globally distributed teams
• Ability to prioritize and execute independently in a fast‑paced environment

• BS in Computer Science or equivalent practical experience
• 5+ years building Java‑based services and REST APIs
• 2+ years of experience in AWS and/or GCP cloud‑native environments
• Experience with large‑scale distributed data systems (No
  
  SQL, streaming, messaging) that power real‑time analytics, streaming, or AI‑driven applications
• Familiarity with event‑driven architectures, pub/sub systems, or Apache Pulsar
• Ability to effectively use AI‑powered development tools to enhance system design, debugging, testing, and code optimization
• Experience with React + Node.js is a plus

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…