Staff Software Engineer (Android)

Role Overview

Join Slack’s Mobile Guardrails team as a Staff Software Engineer (Android). You’ll focus on ensuring the quality and reliability of Slack’s mobile apps by improving engineering systems, build/infrastructure, and developer tooling—thinking in terms of systems at scale.

Key Responsibilities

• Design and implement build systems and test/infrastructure at large scale, optimizing build performance and managing dependencies.
• Identify systemic issues in large codebases (e.g., oversized modules, competing patterns, slow builds, flaky tests) and turn them into high-impact projects with measurable outcomes.
• Collaborate with engineers to define and apply architectural standards that improve code quality and maintainability.
• Build and improve CI/CD pipelines and engineering workflow tooling used daily to validate code.
• Improve testing strategy for reliability and stability (unit, integration, and UI testing; smart test selection; reducing flakiness).
• Use metrics/observability to measure and improve build performance, test reliability, and developer productivity.

Requirements

• 7+ years of software engineering experience with a strong foundation in Android; significant experience in infrastructure/tooling/platform work in a large modular codebase.
• Strong experience with Android build systems at scale (e.g., Gradle, Bazel, or similar), including build performance optimization, dependency management, and modularization strategies for hundreds of modules.
• Proficiency with Kotlin and the Android ecosystem.
• Comfortable scripting for build tooling and automation (Python, Bash, etc.).
• Proven track record addressing systemic engineering problems with measurable results.
• Disciplined approach to development, testing, documentation, and code structure.
• Solid automated testing experience (unit/integration/UI) with focus on test stability.
• Familiarity with metrics/observability tools (e.g., Honeycomb, Grafana).
• Related technical degree required.
• Ability to raise the bar and influence/grow other engineers.

Nice to Have

• Experience guiding/enforcing architectural patterns across a codebase (e.g., DI frameworks, module layering, interface-only dependencies).
• Prior centralized work in infrastructure or developer experience teams serving internal developer customers.
• Cross-platform comfort (experience contributing beyond Android, e.g., iOS or backend tooling).
• Interest/experience with AI-assisted development tooling and building guardrails/context for AI agents.
• Experience using Slack and desire to improve it.