Senior Software Engineer, iOS

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

5 - 7+ years of experience building and maintaining complex iOS applications

Deep expertise with Swift and iOS frameworks

Strong understanding of iOS architectural patterns, such as VIPER

Experience developing core functionality of team's features or systems

Experience driving technical design and culture across their function

Solid experience designing scalable and maintainable APIs for shared components, frameworks, or systems

Extensive experience debugging and fixing crashes, UI rendering issues, and performance problems on iOS using Xcode, Instruments, and other tools

Experience with Combine, Swift Concurrency (async / await, actors), and dependency injection frameworks (e.g., Needle, Resolver)

Experience with scripting (Python / bash etc)

Experience with running a / b experimentation

Ability to monitor and improve app KPIs such as launch time, app hangs, and crash-free sessions

A disciplined approach to development, testing, documentation and code structure in a team environment

An interest in guiding, influencing, and growing other engineers and teams

Deep familiarity with the Xcode ecosystem, CI / CD pipelines, and automated testing tools

A product-minded approach to engineering, with an eye for software quality and an ability to connect technical initiatives to business impact

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

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