Senior Software Engineer

Yahoo serves as a trusted guide for hundreds of millions of people globally, helping them achieve their goals online through our portfolio of iconic products. For advertisers, Yahoo Advertising offers omnichannel solutions and powerful data to engage with our brands and deliver results., Yahoo Search is central to Yahoo's business, and improving search quality is key to maintaining our competitive edge. This role will help evolve foundational systems like Guided Search, leveraging modern machine learning and AI to guide users toward more relevant, optimized, and intelligent search experiences across their journey., * Partner closely with data scientists and ML engineers to productionize machine learning models, transforming research prototypes into scalable, reliable backend services

• Design, build, and operate high-throughput, low-latency APIs that power Guided Search experiences at large query-per-second (QPS) scale

• Own the end-to-end serving lifecycle for ML-powered systems, including model integration, feature retrieval, online inference, rollout, monitoring, and iteration

• Build and maintain robust data pipelines for training, validation, evaluation, and online serving, ensuring data quality, consistency, and freshness

• Define and uphold production-readiness standards, including scalability, reliability, observability, and fault tolerance

• Optimize systems for performance, cost efficiency, and operational excellence in a distributed, cloud-based environment

• Collaborate cross-functionally with product, infrastructure, and platform teams to translate product requirements into backend architectures that can evolve over time

• Instrument services with meaningful metrics, logging, and alerting to support experimentation, A/B testing, and continuous improvement

• Contribute to technical design reviews, documentation, and engineering best practices, raising the overall technical bar of the team

• 4+ years of professional experience building large-scale, highly scalable backend systems

• Strong programming skills in C++ and Python, with experience writing production-quality code

• Experience designing and implementing backend APIs and services, including web or service-oriented architectures

• Hands-on experience with data pipelines and large-scale data processing, using technologies such as PySpark, Spark, or similar frameworks

• Experience integrating and productionizing machine learning models within backend systems

• Experience developing, deploying, and operating services in AWS environments

• Bachelor's or Master's degree in Computer Science or a related field, or equivalent practical experience

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.

The compensation for this position ranges from $128,250.00 - $266,875.00/yr and will vary depending on factors such as your location, skills and experience.The compensation package may also include incentive compensation opportunities in the form of discretionary annual bonus or commissions. Our comprehensive benefits include healthcare, a great 401k, backup childcare, education stipends and much (much) more.

Yahoo Search is one of the most highly scaled applications on the planet. We hire world-class engineers to support our ambitious product and platform goals. Our engineers work in a highly collaborative environment with a strong emphasis on technical excellence and innovation. This is a unique opportunity as we're reimagining the future of Search to reinvent how users find information and accomplish their goals. To achieve this vision, we're integrating new technologies and expanding our infrastructure. This role demands strong technical judgment, analytical thinking, high-quality execution, and a passion for solving complex problems at scale. The AI and Optimization team at Yahoo has a major impact on the user experience across Yahoo Search. Our team powers the understanding, orchestration, optimization, and generative AI engines that deliver modern, intelligent, and optimized search experiences to our users.