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Sr Software Web Engineer, Yahoo Mail

Ouryahoo

United States of America, US$128k – $267khybrid

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About this role

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.

A Little About Us

The Yahoo Mail Web Engineering team builds and maintains one of the largest web applications in the world, serving hundreds of millions of active users daily. We are dedicated to delivering fast, accessible, and intuitive inbox experiences at global scale. Operating at the cutting edge of modern web technologies and AI-augmented engineering workflows, our team values technical excellence, continuous learning, high impact, and collaborative innovation.

Responsibilities • Feature Leadership & Delivery: Define, design, develop, and ship high-impact features for Yahoo Mail web products, owning deliverables end-to-end from technical architecture through production monitoring.

• AI-First Workflow Orchestration: Leverage AI-assisted tools (Cursor, Claude Code) to accelerate web application implementation and refactoring while maintaining strict architectural integrity, code quality, and security standards.

• Lifecycle Optimization: Identify and implement AI-driven efficiencies across the software development lifecycle, replacing manual boilerplate code and repetitive tasks with automated, AI-validated workflows.

• Technical Judgment & Oversight: Balance AI-generated code outputs with rigorous manual review, ensuring correctness, security vulnerability prevention, and adherence to performance and accessibility (a11y) standards.

• High-Scale Impact: Take end-to-end technical ownership of key Yahoo Mail web components, solving complex engineering and user experience challenges at massive scale.

• Quality & Collaboration: Perform thorough, constructive code reviews and collaborate closely with product managers, UX designers, and cross-functional partners to deliver platform improvements and critical fixes.

• Operational Excellence: Write clean, testable code and actively deploy, monitor, and maintain large-scale production web systems distributed across global infrastructure.

• Mentorship & Innovation: Mentor engineers across the squad to elevate technical standards, scale AI-assisted development best practices, and evaluate emerging tooling to keep the team at the technical forefront.

Basic Qualifications • BS in Computer Science, Software Engineering (or equivalent experience) with 6+ years of professional software engineering experience on high-scale web applications.

• Strong fundamentals in Data Structures, Algorithms, Software Architecture, and Web Performance Optimization.

• Deep technical command of modern web frameworks (React, Node.js, JavaScript/TypeScript) and modern styling methodologies (Atomic CSS, CSS3).

• Solid hands-on experience with modern front-end build and testing tools (Webpack, Redux Toolkit, Storybook, Jest, Playwright, React Testing Library).

• Hands-on proficiency with AI coding assistants (Cursor, Claude Code) integrated into daily software design, development, and debugging workflows.

• Demonstrated ability to write structured prompts, evaluate AI-generated outputs, and iterate on AI suggestions to produce robust, secure production code.

• Active commitment to validating AI-assisted code to prevent security vulnerabilities, hallucinations, edge-case failures, and performance regressions.

• Strong track record of shipping and operating scalable customer-facing web features in a CI/CD environment.

• Excellent verbal and written communication skills with a collaborative, growth-oriented mindset.

Preferred Qualifications • Experience developing high-traffic email, messaging, productivity, or calendar web applications.

• Experience building customer-facing product features powered by LLMs, GenAI APIs, or machine learning pipelines.

• Experience using multiagent workflows.

• Experience in Unix/Linux operating environments and shell scripting.

• Familiarity with mobile web development and responsive web design patterns.

• Experience working in Agile/Scrum or Squad-based engineering structures.

• Familiarity with enterprise observability tools (Splunk, Grafana) and client-side performance monitoring.

• Practical exposure to accessibility (a11y) standards (WCAG) and internationalization (i18n) for global applications.

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.co

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