Applies OWASP Mobile Security recommendations for iOS development: reverse engineering protection, secure Keychain data storage, injection prevention. Conducts independent code security audits, checks for data leaks via IPC and clipboard. Implements certificate pinning and man-in-the-middle attack protection.
Roles · iOS Developer · Mid-level
What a Mid-level } should know
1 core skills, 53 in total. Expectations per skill, and what changes at the next level.
This page lists what a Mid-level } is expected to know and do, skill by skill. Core skills are the ones a manager and peers assess in a review cycle; the rest count only in self-assessment. Main areas: Security.
1core skills
52additional skills
1skill areas
0%at Advanced or Expert
Core skills for a Mid-level
Grouped by area. The label on the right is the expected depth: Awareness, Working, Advanced or Expert.
Security · 1
OWASP & Application Security
Working
Additional skills
Not assessed by the team, but part of the self-assessment and the development plan.
Algorithms & ComplexityApache KafkaAPI DocumentationApp Store Optimization (ASO)Async ProgrammingAWSChatGPT / ClaudeClean ArchitectureCode Quality & RefactoringCode ReviewCombine & Swift ConcurrencyCore Data & SwiftDataCursor IDEData FetchingData StructuresDatabase IndexingDesign PatternsDockerE2E TestingGit AdvancedGitHub Actions / GitLab CIGitHub CopilotGraphQL DesignIntegration TestingJWT / OAuth2 / OIDCKubernetes CoreMemory ManagementMobile CI/CDMobile PerformanceMobile SecurityMobile TestingMultithreadingNetwork FundamentalsOOP & SOLID PrinciplesOpenTelemetryPerformance BudgetsPostgreSQLPrometheus & GrafanaPrompt Engineering for CodeQuery OptimizationRedisREST API DesignSecure Coding PracticesSLI / SLO / SLAStructured LoggingSwift & SwiftUISystem Design FundamentalsTerraformType Safety & Type SystemsUIKit & Auto LayoutUnit TestingWebSocket API Design
What changes at Senior
53 skills get a higher expectation or become core when moving from Mid-level to Senior. The biggest jumps first.
- Algorithms & Complexity: Working → Advanced · becomes core
- API Documentation: Working → Advanced · becomes core
- App Store Optimization (ASO): Working → Advanced · becomes core
- Async Programming: Working → Advanced · becomes core
- ChatGPT / Claude: Working → Advanced · becomes core
- Clean Architecture: Working → Advanced · becomes core
- Code Quality & Refactoring: Working → Advanced · becomes core
- Code Review: Working → Advanced · becomes core
- Combine & Swift Concurrency: Working → Advanced · becomes core
- Core Data & SwiftData: Working → Advanced · becomes core
Run this with your whole team
Self-assessment plus manager and peer reviews against the same matrix, gap analysis and next-level readiness for every engineer. Team Pro is free for 14 days; individual tools stay free forever.
} in the open competency matrix: 53 skills across 5 levels. The matrix is free for individuals and stays free.