Senior iOS Prototyping Architect

Slack; California City (CA); On-site; USD 218,000 - 365,000; Full time

Job summary

Slack is seeking a Senior Staff Engineer to shape the future of Slack’s mobile product. As a Prototyping Engineer, you’ll embed as a leader on greenfield, zero-to-one initiatives, influencing product and design through early engineering work that ships first-version features for millions of users.

You’ll collaborate with Product, Design, Backend, and other mobile engineers to deliver intuitive, high-performance experiences at scale, mentoring others and evangelizing mobile best practices across

Qualifications

• 10+ years of professional software engineering experience building complex iOS apps at scale.
• Proven track record of starting new initiatives beyond the org, prototyping paths to production, and aligning orgs to support new initiatives.
• Experience in fast-paced environments, startup or zero-to-one teams within larger enterprises.
• Proven track record of leading large, ambiguous, org-spanning technical initiatives with business impact.
• Deep expertise in Swift and modern iOS development.
• Strong understanding of iOS architecture, lifecycle, concurrency, networking, and performance optimization.
• Ability to influence product and technical direction through collaboration with execs, engineering, product, and design leadership.
• Bias toward ownership, execution, and continuous improvement to prioritize high-leverage work.

Responsibilities

• Shape the future of Slack on mobile by leading engineering development of experiences used by millions daily across multiple teams.
• Lead complex, cross-functional initiatives from exploratory phases through production rollout and evolution.
• Lead feature prototyping to define the mobile user experience for Slack’s biggest opportunities.
• Partner with Product and Design to balance user needs, technical constraints, and maintainability.
• Influence engineering decisions beyond your team through leadership, reviews, and mentorship.
• Set and evangelize best practices for mobile feature development and operational excellence.
• Mentor senior engineers and contribute to the growth of Slack’s mobile engineering community.

Skills

iOS development

Swift

Technical leadership

Cross-functional collaboration

Mobile prototyping

Tools

Swift Concurrency

Combine

Needle

Resolver

Job description

Slack is seeking a Senior Staff Engineer to shape the future of Slack’s mobile product. As a Prototyping Engineer, you’ll embed as a leader on greenfield, zero-to-one initiatives, influencing product and design through early engineering work that ships first-version features for millions of users.

You’ll collaborate with Product, Design, Backend, and other mobile engineers to deliver intuitive, high-performance experiences at scale, mentoring others and evangelizing mobile best practices across