Senior Software Dev Engineer

Yahoo Mail AntiSpam and Delivery Engineering powers the core intelligence and transmission infrastructure for over 220 million active users worldwide.

• AntiSpam Engineering builds high-throughput, real-time protection systems that shield users from spam, phishing, fraud, and abuse using advanced machine learning algorithms and agentic AI detection.
• Delivery Engineering manages high-performing, resilient distributed systems that deliver billions of outbound and inbound messages daily across web services, email RFCs, and global networking layers.

We operate at a massive scale-handling billions of daily connections and managing petabytes of storage. As we modernize our stack toward cloud-native architecture (GCP), we are actively embedding agentic AI and AI-assisted workflows into our daily engineering culture.

About the Role

As a Senior Software Engineer (IC4) on the AntiSpam and Delivery team, you will drive technical solutions across high-volume spam detection, entity reputation, traffic shaping, and email delivery pipelines., * Architect, build, and maintain high-concurrency, distributed microservices in Java and Go that meet stringent SLA, reliability, and security constraints.

• Champion AI-assisted engineering practices on the team, leveraging tools like Claude, GitHub Copilot and Cursor to accelerate feature implementation, code refactoring, and automated test suite creation.
• Integrate agentic AI workflows and LLM capabilities to enhance real-time spam detection models, abuse pattern recognition, and automated root-cause diagnostics.
• Lead technical initiatives across the squad, driving architecture reviews, code quality standards, and continuous deployment to production.
• Automate infrastructure provisioning, scaling, CI/CD pipelines, and telemetry monitoring across cloud-native (GCP) and hybrid environments.
• Evaluate emerging AI engineering tools and agentic frameworks, recommending safe, effective ways to modernize engineering workflows and eliminate repetitive manual tasks.
• Mentor junior and mid-level engineers, fostering a strong culture of technical excellence, continuous learning, and collaborative problem-solving.

• 5+ years of professional software development experience with strong fluency in Java, Go, or C++ (depth in Java is strongly preferred).
• 2+ years of experience designing, owning, and operating components of large-scale distributed server applications in production.
• B.S. or M.S. in Computer Science, Computer Engineering, or equivalent practical experience.
• Hands-on proficiency with AI-assisted development tools (e.g., Claude, GitHub Copilot, Cursor) to accelerate coding, debugging, and system optimization.
• Strong computer science fundamentals in data structures, algorithms, operating systems, and distributed networking.
• Proven experience building and deploying cloud-native applications (preferably in GCP or AWS) with CI/CD automation.
• Demonstrated ability to lead technical initiatives, guide architectural choices, and mentor engineering peers., * Operational experience managing high-throughput, fault-tolerant distributed systems under strict low-latency requirements.
• Experience with prompt engineering, agentic AI frameworks, or integrating LLM APIs into production pipelines and developer tools.
• Experience with big data and stream processing technologies (e.g., Hadoop, Spark, Kafka, HBase).
• Background in anti-spam, anti-abuse, text classification, or anomaly detection systems will be a plus.
• Working knowledge of scripting languages (e.g., Python) for data analysis and pipeline automation.
• Proactive mindset toward experimenting with modern AI workflows and advocating for continuous developer workflow enhancements

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 Mail is the ultimate consumer inbox with hundreds of millions of users. It's the best way to access your email and stay organized from a computer, phone or tablet. With its beautiful design and lightning fast speed, Yahoo Mail makes reading, organizing, and sending emails easier than ever.