Staff Software Engineer (Android)

TL;DR

Staff Software Engineer (Android): Building guardrails, delivery signals, and observability for Slack's mobile apps to ensure confident shipping of human or AI-generated code with an accent on build systems, test infrastructure, architectural enforcement, and metrics-driven investments. Focus on optimizing large-scale build performance, stabilizing flaky tests, modularizing massive codebases, and defining quality at scale across connected mobile infrastructure.

Location: San Francisco CA, Seattle WA, or Atlanta GA (onsite)

Company

hirify.global's Mobile Guardrails team for Slack, focusing on developer tooling, AI-assisted development, and mobile platform engineering.

What you will do

• Design and enforce architectural patterns like dependency injection, module layering, and interface-only dependencies across large codebases.
• Optimize build systems (Gradle, Bazel) for performance, dependency management, and modularization in hundreds-module codebases.
• Build and improve CI/CD pipelines, build observability, and developer workflow tooling for daily code validation.
• Address systemic issues like flaky tests, oversized modules, slow builds via quarantine infrastructure, rebuild radii, and dependency graphs.
• Implement automated testing strategies (unit, integration, UI) with smart selection and stability management.
• Measure developer productivity and system health using tools like Honeycomb or Grafana.

Requirements

• 7+ years software engineering with strong Android foundation and infrastructure/tooling/platform work in large modular codebases
• Proficiency in Kotlin, Android ecosystem, build systems, CI/CD, scripting, and cross-platform tooling
• Track record fixing systemic codebase problems (flaky tests, slow builds, oversized modules) with measurable outcomes
• Experience with metrics/observability tools and automated testing frameworks
• Disciplined approach to development, testing, documentation, and code structure
• Related technical degree required

Nice to have

• Experience using Slack
• AI-assisted development tooling (Claude Code, Codex) and infrastructure for AI agents
• Prior centralized infrastructure/developer experience team work
• Cross-platform contributions (iOS, backend)