Languages: Kotlin Java TypeScript JavaScript Python SQL
Mobile: Android (Native) Compose KMP/CMP React Native Firebase Gradle Bluetooth
Backend & Architecture: Clean Hexagonal Microservices DDD TDD/BDD REST (OpenAPI) OAuth2 JWT Ktor Django
Infra / Cloud: GCP Docker Kubernetes Nginx Redis Prometheus Grafana
Databases: PostgreSQL MySQL SQLite
Delivery & Collaboration: Git/GitLab Bitrise Jira Confluence Agile (Scrum/Kanban)
AI tooling: Claude Code Gemini CLI