Note: The job is a remote job and is open to candidates in USA. Slack is a digital headquarters that brings people, apps, customers, and AI agents together to help teams communicate, collaborate, and get work done. The Senior Staff Prototyping Engineer will lead greenfield iOS initiatives, shaping product and design direction through rapid prototyping and shipping innovative, intuitive, performant, and reliable mobile experiences. The role partners across Product, Design, Backend, and mobile engineering while providing technical leadership, mentorship, and organizational influence.

Responsibilities

• Shape the future of Slack on mobile by leading the engineering development of experiences used by millions of users every day, spanning multiple teams and the broader organization
• Lead the most complex, ambiguous, cross-functional initiatives from early technical exploration through production rollout and long-term evolution
• Lead feature prototyping to define the mobile user experience for Slack’s biggest opportunities
• Partner closely with Product and Design to shape experiences that balance user needs, technical constraints, and long-term maintainability
• Influence engineering decisions beyond your immediate team through technical leadership, product reviews, and mentorship
• Set and evangelize best practices for mobile feature development and operational excellence across the broader engineering organization
• Mentor senior engineers and contribute to the growth of the broader mobile engineering community within Slack

Skills

• 10+ years of professional software engineering experience, including significant experience building complex, high-craft iOS applications at scale
• Proven track record of moving outside of organizational boundaries to start new initiatives, prototype the path to production, and reorient the organization to support the new initiative
• Experience working in fast-paced environments, whether at a start-up, in an incubator, or on a zero-to-one team inside a larger enterprise
• Proven track record of leading large, ambiguous, org-spanning technical initiatives with significant business impact
• Deep expertise in Swift framework and modern iOS development
• Strong understanding of iOS architecture, application lifecycle, concurrency, networking, and performance optimization
• Demonstrated ability to influence product and technical direction through expertise and collaboration, driving alignment across executive stakeholders, Engineering/Product/Design leadership, and multiple teams
• A bias toward ownership, execution, and continuous improvement, with the judgment to prioritize the highest-leverage work across the organization
• Experience with Combine, Swift Concurrency (async/await, actors), and dependency injection frameworks (e.g. Needle, Resolver)
• Experience leading large-scale new products, features, or product transformations spanning multiple teams or the whole org
• Experience using research, usability testing, data, and experimentation to ground decisions and uncover opportunities
• Contributions to open source projects or the iOS community, or other external recognition of technical leadership
• Experience building collaboration, productivity, messaging, AI, or enterprise software products
• Excellent communication skills
• Strong product intuition and a passion for creating exceptional user experiences

Benefits

• Time off programs
• Medical insurance
• Dental insurance
• Vision insurance
• Mental health support
• Paid parental leave
• Life insurance
• Disability insurance
• 401(k)
• Employee stock purchasing program
• Office Tech-Flexible work arrangement

Company Overview

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