Content Serving and Recommendation - Senior Software Developer

It takes powerful technology to connect our brands and partners with an audience of nearly 900 million. 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. Want in?
About Our Team
We are the content recommendation and personalization team for all our Yahoo brands. Our system powers properties such as Yahoo.com, Yahoo Sports, Yahoo Finance, AOL.com, TechCrunch, AutoBlog and Engadget on the web as well as the mobile experiences. Our data processing pipelines implicitly learn the users' interests and construct their interest graphs from their data. Based on those interest graphs, popularity and trending signals, our system serves content recommendations that are relevant, timely and personalized to the users.
To do all this, we work with technologies such as Vespa (Vespa.ai), Redis, Cassandra, Storm, Kafka, Hadoop, Hive, Pig, Tensorflow, Spark, and gRPC. We develop machine learned models and build pipelines that continuously collect new training data. We also work on various classification models, clustering algorithms, and active learning solutions.
We work on a massive scale, ingest and transform 100s of terabytes of data, build various interesting algorithms and work closely with our data scientists.
What We Are Looking For
We are looking for a Senior Backend Engineer to help build the backend technology stack for our recommendation and personalization system. Responsibilities include writing fault tolerant, low latency serving API's, building async workflows that process millions of real-time user events and content, and collaborating with science teams to engineer applied machine learning solutions for content recommendation.
Job Responsibilities

• Work on projects of diverse scope and complexity to design, build, implement, modify, test, debug and deploy software systems, large-scale infrastructure platforms and network services that are the foundation of multiple Yahoo properties, brands and applications
• Responsible for performance, reliability, availability, scalability and security. Services are delivered to applications through standard and proprietary protocols and behavior may be customized via complete APIs (Application Programming Interfaces) and/or web services
• Work with project managers and team to collect requirements for product features and plan the project roadmap
• Come up with design specifications for the features and conduct formal and informal design reviews with the team
• Implement and test new feature and functionalities locally and production-like environments integrating with dependent systems
• Launch changes for A/B testing and evaluate impact of the changes on user engagement. Work with the product team on go/no-go decision
• Mentor more junior team members to help them grow and hone their technical skills
• Lead a small team of engineers to plan and coordinate tasks to drive towards completion of a mid-sized project
• Coordinate with various partner teams to achieve a common goal by discussing and planning the technical solutions

You Must Have

• MS/BS in Computer Science (or equivalent)
• 7+ years of experience in software engineering with solid programming knowledge and hands-on experience
• Strong experience developing in Java
• Strong oral and written communication skills
• Ability to demonstrate sound development and CI/CD practices, object oriented and service oriented architecture, and design patterns
• Experience with large data processing and storage solutions like Storm, Spark, Hadoop Map/Reduce, Pig, Oozie, REDIS, DynamoDB, Cassandra.
• Experience working with search and real time retrieval solutions like Vespa.ai, Elasticsearch, Apache Solr.
• Collaboration experience with scientists in areas that involve information retrieval and machine learning to solve problems for search ranking and relevance.
• Experience with machine learning frameworks like Tensorflow, Jupyter, Spark streaming, etc.
• Multi-Tier and distributed enterprise architecture experience
• Previous experience working on scalable, high-performance server solutions

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 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 408-336-1409. Requests and calls received for non-disability related issues, such as following up on an application, will not receive a response.
At Yahoo, 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. Check out our diversity and inclusion ( www.yahooinc.com/diversity/ ) page to learn more.
US Only: Please be aware that Yahoo requires all employees entering a U.S. Yahoo office and/or attending a company event (including client events) are required to be vaccinated for COVID-19. This position will require the successful candidate to obtain and show proof of a vaccination to enter a U.S. Yahoo office and/or attending a company event (including client events). Yahoo is an equal opportunity employer, and will provide reasonable accommodation to those individuals who are unable to be vaccinated consistent with federal, state, and local law.
The compensation for this position ranges from $117,000.00 - $243,125.00/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, in addition to equity incentives. Yahoo provides industry-leading benefits including healthcare, 401K savings plan, company holidays, vacation, sick time, parental leave and an employee assistance program. Eligibility requirements apply.
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.
Currently work for Yahoo? Please apply on our internal career site.