Senior Staff Slack Front End Infrastructure Software Engineer

• We’re seeking a Senior Staff Engineer to help lead the next generation of frontend architecture — improving performance, scalability, developer productivity, and reliability at scale
• As a technical leader on the team, you’ll partner across product, platform, and infrastructure to guide architectural decisions, mentor engineers, and shape the direction of the frontend at Slack
• Lead cross-functional frontend initiatives to improve performance, scalability, resiliency, and developer productivity
• Design, maintain, and evolve core frontend modules — including Slack’s WebSocket infrastructure, boot process, Redux/React layers, logging, and alerting systems
• Drive key architectural decisions that adapt our frontend infrastructure to meet evolving product and platform needs
• Identify and resolve communication and alignment challenges across teams and stakeholders
• Represent and advocate for frontend technical strategy at an organizational level

Benefits

• Medical Care
• Life Insurance
• Retirement Savings
• Employee Assistance Programs
• With 9 standard holidays and four floating holidays, you get a total 13 paid days off each year- A related technical degree required
• Proficient in React, Redux, and modern web technologies, with an ability to explain trade-offs and architectural complexities clearly
• A people-centered mindset — you understand that long-term technical success depends on the experience of the engineers who build on your work
• Deep familiarity with browser performance profiling and debugging tools
• Passion for mentorship, technical education, and knowledge sharing
• Author code that establishes forward-looking patterns that multiple teams depend on and can contribute to effectively
• Strong communication skills — written and verbal — with a collaborative and empathetic approach to cross-team work
• Extensive experience with JavaScript and TypeScript in large-scale applications
• Expertise in frontend performance: React/Redux optimizations, memory profiling, flame graph analysis, and tuning for production
• Experience leading large-scale migrations, upgrades, or frontend modernization initiatives
• Familiarity with persistence layers, service workers, caching strategies, and offline functionality