Understands basic mobile application security principles per OWASP Mobile Top 10. Avoids storing sensitive data in UserDefaults and NSLog, uses HTTPS for all network requests. Knows main vulnerabilities: insecure data storage, weak authentication, and plaintext data transmission.
Roles · iOS Developer · Junior
What a Junior } should know
1 core skills, 53 in total. Expectations per skill, and what changes at the next level.
This page lists what a Junior } 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 Junior
Grouped by area. The label on the right is the expected depth: Awareness, Working, Advanced or Expert.
Security · 1
OWASP & Application Security
Awareness
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 Mid-level
53 skills get a higher expectation or become core when moving from Junior to Mid-level. The biggest jumps first.
- OWASP & Application Security: Awareness → Working
- Algorithms & Complexity: Awareness → Working
- Apache Kafka: Awareness → Working
- API Documentation: Awareness → Working
- App Store Optimization (ASO): Awareness → Working
- Async Programming: Awareness → Working
- AWS: Awareness → Working
- ChatGPT / Claude: Awareness → Working
- Clean Architecture: Awareness → Working
- Code Quality & Refactoring: Awareness → Working
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.