Mobile Development

Android Developer

Developing native Android applications with Kotlin

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53 skills
261 requirements
106 mandatory
15 domains
Awareness 53 Working 83 Advanced 100 Expert 25
Level:
All domains Programming Fundamentals 9 Backend Development 2 Frontend Development 1 Mobile Development 8 Database Management 3 API & Integration 4 Cloud & Infrastructure 5 DevOps & CI/CD 1 Testing & QA 4 Security 3 AI-Assisted Development 4 Architecture & System Design 2 Observability & Monitoring 4 Version Control & Collaboration 2 Performance Engineering 1
Profiles: Awareness Working Advanced Expert -- Click level to expand, click requirement for details and voting

Programming Fundamentals

9 skills · 45 requirements
Skill Junior Middle Senior Lead Principal
Algorithms & Data Structures
Algorithms & Complexity Awareness Working Advanced Advanced Expert
Data Structures Awareness Working Working Advanced Expert
OOP & Design Patterns
OOP & SOLID Principles Awareness Working Working Advanced Advanced
Design Patterns Awareness Working Working Advanced Advanced
Concurrency & Parallelism
Multithreading Awareness Working Advanced Advanced Expert
Async Programming Awareness Working Advanced Advanced Expert
Clean Code & Refactoring
Code Quality & Refactoring Awareness Working Working Advanced Expert
Type Systems
Type Safety & Type Systems Awareness Working Working Advanced Advanced
Memory Management
Memory Management Awareness Working Advanced Advanced Expert

Backend Development

2 skills · 10 requirements
Skill Junior Middle Senior Lead Principal
Message Queues & Event Streaming
Apache Kafka Awareness Working Working Advanced Advanced
Caching
Redis Awareness Working Working Advanced Advanced

Frontend Development

1 skills · 5 requirements
Skill Junior Middle Senior Lead Principal
State Management
Data Fetching Awareness Working Advanced Advanced Expert

Mobile Development

8 skills · 40 requirements
Skill Junior Middle Senior Lead Principal
Android Development
Kotlin & Jetpack Compose Awareness Working Advanced Advanced Expert
Android Architecture Components Awareness Working Advanced Advanced Expert
Navigation & Deep Links Awareness Working Advanced Advanced Expert
Kotlin Coroutines & Flow Awareness Working Advanced Advanced Expert
General Mobile Practices
Mobile CI/CD Awareness Working Advanced Advanced Expert
Mobile Security Awareness Working Advanced Advanced Expert
Mobile Performance Awareness Working Advanced Advanced Expert
App Store Optimization (ASO) Awareness Working Advanced Advanced Expert

Database Management

3 skills · 15 requirements
Skill Junior Middle Senior Lead Principal
Relational Databases
PostgreSQL Awareness Working Working Advanced Advanced
Database Optimization
Database Indexing Awareness Working Working Advanced Advanced
Query Optimization Awareness Working Working Advanced Advanced

API & Integration

4 skills · 20 requirements
Skill Junior Middle Senior Lead Principal
REST API
REST API Design Awareness Working Working Advanced Advanced
GraphQL
GraphQL Design Awareness Working Advanced Advanced Expert
API Protocols
WebSocket API Design Awareness Working Advanced Advanced Expert
API Management
API Documentation Awareness Working Advanced Advanced Expert

Cloud & Infrastructure

5 skills · 25 requirements
Skill Junior Middle Senior Lead Principal
Containerization
Docker Awareness Working Working Advanced Advanced
Kubernetes & Orchestration
Kubernetes Core Awareness Working Working Advanced Advanced
Infrastructure as Code
Terraform Awareness Working Working Advanced Advanced
Cloud Providers
AWS Awareness Working Working Advanced Advanced
Networking
Network Fundamentals Awareness Working Working Advanced Advanced

DevOps & CI/CD

1 skills · 5 requirements
Skill Junior Middle Senior Lead Principal
CI/CD
GitHub Actions / GitLab CI Awareness Working Working Advanced Advanced

Testing & QA

4 skills · 20 requirements
Skill Junior Middle Senior Lead Principal
Unit Testing
Unit Testing Awareness Working Working Advanced Advanced
Integration Testing
Integration Testing Awareness Working Working Advanced Advanced
E2E Testing
E2E Testing Awareness Working Advanced Advanced Expert
Specialized Testing
Mobile Testing Awareness Working Advanced Advanced Expert

Security

3 skills · 13 requirements
Skill Junior Middle Senior Lead Principal
Application Security
OWASP & Application Security Awareness Working Advanced — —
Secure Coding Practices Awareness Working Advanced Advanced Expert
Authentication & Authorization
JWT / OAuth2 / OIDC Awareness Working Advanced Advanced Expert

AI-Assisted Development

4 skills · 18 requirements
Skill Junior Middle Senior Lead Principal
AI Coding Assistants
GitHub Copilot Awareness Working Working Advanced Advanced
Cursor IDE Awareness Working Working Advanced —
ChatGPT / Claude Awareness Working Working Advanced Advanced
Prompt Engineering
Prompt Engineering for Code Awareness Working Working Advanced —

Architecture & System Design

2 skills · 10 requirements
Skill Junior Middle Senior Lead Principal
System Design
System Design Fundamentals Awareness Working Working Advanced Advanced
Architecture Patterns
Clean Architecture Awareness Working Advanced Advanced Expert

Observability & Monitoring

4 skills · 20 requirements
Skill Junior Middle Senior Lead Principal
Logging
Structured Logging Awareness Working Working Advanced Advanced
Metrics & Monitoring
Prometheus & Grafana Awareness Working Working Advanced Advanced
Distributed Tracing
OpenTelemetry Awareness Working Working Advanced Advanced
Alerting & On-Call
SLI / SLO / SLA Awareness Working Working Advanced Advanced

Version Control & Collaboration

2 skills · 10 requirements
Skill Junior Middle Senior Lead Principal
Git & Workflows
Git Advanced Awareness Working Working Advanced Advanced
Code Review
Code Review Awareness Working Working Advanced Expert

Performance Engineering

1 skills · 5 requirements
Skill Junior Middle Senior Lead Principal
Benchmarking
Performance Budgets Awareness Working Advanced Advanced Expert
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