Staff Software Engineer, Frontend Infrastructure

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Job Category

Software Engineering

Job Details

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Staff Software Engineer, Frontend Infrastructure

Slack is looking for a Staff Frontend Infrastructure Engineer who views the browser as a complex distributed system. While most frontend roles focus on building user-facing features, this role is dedicated to building the Web Platform—the architectural foundation that enables hundreds of engineers to ship high-performance, reliable code to millions of users.

You won't just use frameworks; you will optimize their internals, architect the network layers that sync real-time data, and lead the technical strategy for our application state and data flow.

You will work with real-time data streams and author code that sets the standard for quality and velocity, establishing patterns that other teams can effectively contribute to. You will collaborate closely with Product and Design to influence the product roadmap and drive the technical vision for our large (and growing!) user base.

What you will be doing

• Strategic Leadership: You will influence the product roadmap in collaboration with Product, Design, and Engineering, while helping to drive team-wide goals, planning, and feedback cycles.

• Technical Standards: You will author code that sets the standard for quality and velocity for the team, frequently establishing patterns that other teams can effectively contribute to.

• Navigating Ambiguity: You will thrive in ambiguity, often identifying and offering solutions to problems, like framework migrations or rendering bottlenecks, that are not yet evident to the leaders who presented them.

• System Health: You will efficiently use and improve our infrastructure to reduce cost, load, downtime, and incidents, navigating trade-offs to ensure the healthy progress of the codebase. This includes optimizing the “Boot” lifecycle and managing API reliability through request deduplication and rate-limiting

• Mentorship & Culture: You will build a safe space for learning and serve as a skilled and trusted mentor to engineers across the organization, developing the ability to coach new leaders rather than just individual contributors.

• Cross-Functional Execution: You will collaborate with teammates across engineering to identify, define, and solve strategically important initiatives, acting as a leader in communication to de-escalate conflicts and drive consensus.

What you should have

• 7+ years of experience writing client-side code (React + Typescript) for modern web applications at scale.

• Development at Scale: Experience working in a large-scale, shared codebase with hundreds of contributors, where you have successfully established patterns that allow other teams to contribute effectively without friction.

• Strategic Architecture: Expertise in building complex systems and tooling, with the ability to lead technical design that guides the best decisions across the team.

• Business Alignment: Exceptional communication skills with the ability to tie technical infrastructure your work succinctly to company goals like performance, reliability and developer velocity. Routinely and facilitates dialogue between junior and senior members to surface blockers.

• Technical Breadth: Experience investigating and improving performance (e.g. Core Web Vitals, memory management) and reliability (e.g. Websocket resilience, request handling), with a track record of developing novel applications of existing frameworks or building new tools that enable "self-serve" models across engineering teams.

• Self-Awareness: A commitment to proactively offering regular, constructive feedback and gracefully receiving it to improve yourself and the team culture.

Bonus Points

• Experience contributing to the engineering reputation externally (e.g., blog posts, speaking at conferences, open source contributions).

• Experience navigating large-scale framework upgrades (e.g. React 19) in a production environment.

• Experience with WebRTC, WebSockets, Local Storage and Service Workers at extreme scalerelated web APIs.

• Experience in fast-paced and dynamic product development environments.

Slack has a positive, diverse, and supportive culture—we look for people who are curious, inventive, and work to be a little better every single day. In our work together we aim to be smart, humble, hardworking and, above all, collaborative. If this sounds like a good fit for you, why not say hello?

Unleash Your Potential

When you join Salesforce, you’ll be limitless in all areas of your life. Our benefits and resources support you to find balance and be your best, and our AI agents accelerate your impact so you can do your best. Together, we’ll bring the power of Agentforce to organizations of all sizes and deliver amazing experiences that customers love. Apply today to not only shape the future — but to redefine what’s possible — for yourself, for AI, and the world.

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In the United States, compensation offered will be determined by factors such as location, job level, job-related knowledge, skills, and experience. Certain roles may be eligible for incentive compensation, equity, and benefits. Salesforce offers a variety of benefits to help you live well including: time off programs, medical, dental, vision, mental health support, paid parental leave, life and disability insurance, 401(k), and an employee stock purchasing program. More details about company benefits can be found at the following link: https://www.salesforcebenefits.com.Pursuant to the San Francisco Fair Chance Ordinance and the Los Angeles Fair Chance Initiative for Hiring, Salesforce will consider for employment qualified applicants with arrest and conviction records.

At Salesforce, we believe in equitable compensation practices that reflect the dynamic nature of labor markets across various regions. The typical base salary range for this position is $197,300 - $313,700 annually. In select cities within the San Francisco and New York City metropolitan area, the base salary range for this role is $237,700 - $344,700 annually. The range represents base salary only, and does not include company bonus, incentive for sales roles, equity or benefits, as applicable.