JobsSenior Staff Prototyping Engineer, iOS
Slack logo

Senior Staff Prototyping Engineer, iOS

Slack

Location

remote, New York, NY, San Francisco, CA

Type

Full-time

Posted

9/29/2026

Compensation

$218,400 - $401,400 per year

Undergraduate with 5+ Years of Experience
H-1B FY202697.2% approval+26% YoY
👑 Elite sponsor

Job description

The Senior Staff Engineer role at Slack focuses on shaping the future of the mobile product by leading engineering development on innovative initiatives. The Slack Mobile team is dedicated to enhancing user experiences for millions of daily users through high-performance and reliable applications. This position requires a self-directed engineer capable of navigating ambiguous challenges and influencing product direction. The role emphasizes collaboration with Product, Design, and other engineering teams to create exceptional mobile experiences.

Requirements

  • 10+ years of professional software engineering experience, including significant experience building complex, high-craft iOS applications at scale.
  • 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.

Responsibilities

  • Lead the engineering development of mobile experiences used by millions of users every day.
  • Manage complex, ambiguous, cross-functional initiatives from early technical exploration through production rollout.
  • Define the mobile user experience for Slack’s biggest opportunities through feature prototyping.
  • Partner closely with Product and Design to balance user needs, technical constraints, and long-term maintainability.
  • Mentor senior engineers and contribute to the growth of the broader mobile engineering community within Slack.

Benefits

  • Employees at Slack, as part of Salesforce, are often offered comprehensive benefits focused on wellbeing and inclusion, including competitive health-care coverage, time off to rest, recharge and volunteer, and holistic programs that support mental health, family planning and overall work–life balance.

H-1B filing history

Public USCIS petition and DOL LCA counts · latest USCIS FY2026, LCA FY2026

Filing entity: Salesforce Inc

As of Aug 23, 2026

Initial approvals

169

FY2026

Approval rate

97.2%

FY2026

LCA certified

1,585

FY2026

Entry-level share

0.2%

FY2026

Initial approvals YoY

+26%

Trend

LCA certified YoY

-21%

Trend

Initial approvals by fiscal year

Approval rate by fiscal year

Continuing vs initial approvals

LCA certified positions by quarter

LCA certified positions by fiscal year

Based on public USCIS and DOL filings; not a sponsorship guarantee.

Is this posting expired or inaccurate?