Sr. Software Engineer, iOS

Salesforce, Inc..; San Francisco (CA); On-site; USD 130,000 - 160,000; Full time

Job summary

A leading company is seeking an experienced infrastructure engineer for the Slack iOS client. The role involves building sustainable infrastructure, ensuring code quality, and mentoring other engineers. Ideal candidates will have extensive experience with iOS applications and a product-minded approach to engineering.

Qualifications

• 5 - 7+ years of experience building and maintaining complex iOS applications.
• Experience with Combine, Swift Concurrency, and dependency injection frameworks.

Responsibilities

• Build and maintain infrastructure for the Slack iOS client.
• Drive technical design and culture across the function.

Skills

Swift

iOS frameworks

UI architectural patterns

Python

A/B experimentation

Education

Related technical degree

Tools

Xcode

Instruments

Job description

We are looking for people who are passionate about building strong, sustainable infrastructure for the Slack iOS client, which is used by millions of people every day. The iOS Product Infrastructure team enables feature engineers at Slack to tackle complicated problems quickly without needing to reinvent the wheel. We’re looking for engineers who specialize in either UI frameworks or data/networking infrastructure.

As an infrastructure engineer, you like building for the long term and value patterns and structures that allow for maximum flexibility in a constantly evolving product. You set a high bar for the technical design and code quality of your team. You demonstrate exceptional ownership of not only the area of your team, but across Slack’s entire iOS codebase. You have a “can do” demeanor and nothing is beneath you or outside your responsibilities because you do what it takes to deliver the highest quality code and the most impactful features. You are self-directed, innovative, and biased towards action in fast-paced environments. You love to build new things and thrive in ambiguity and even failure.

What You Should Have

1. 5 - 7+ years of experience building and maintaining complex iOS applications
2. Deep expertise with Swift and iOS frameworks
3. Strong understanding of iOS architectural patterns, such as VIPER
4. Experience developing core functionality of team's features or systems
5. Experience driving technical design and culture across their function
6. Solid experience designing scalable and maintainable APIs for shared components, frameworks, or systems
7. Extensive experience debugging and fixing crashes, UI rendering issues, and performance problems on iOS using Xcode, Instruments, and other tools
8. Experience with Combine, Swift Concurrency (async/await, actors), and dependency injection frameworks (e.g., Needle, Resolver)
9. Experience with scripting (Python/bash etc)
10. Experience with running A/B experimentation
11. Ability to monitor and improve app KPIs such as launch time, app hangs, and crash-free sessions
12. A disciplined approach to development, testing, documentation, and code structure in a team environment
13. An interest in guiding, influencing, and growing other engineers and teams
14. Deep familiarity with the Xcode ecosystem, CI/CD pipelines, and automated testing tools
15. A product-minded approach to engineering, with an eye for software quality and an ability to connect technical initiatives to business impact
16. A related technical degree required

Bonus Points

• Experience using Slack and a keen interest in making it better
• A passion for creating accessible applications
• Prior experience on a centralized infrastructure team, serving both internal developer customers and external users

Team Blog Posts

• Stabilize, Modularize, Modernize: Scaling Slack’s Mobile Codebases
• Scaling Slack’s Mobile Codebases: Modernization
• Extending Anvil for Fun and Profit
• Developing in the Open