Version Control (Git, GitHub, GitLab, Bitbucket)
CI/CD (GitHub Actions, GitLab CI/CD, Jenkins, CircleCI)
API Design & Documentation (Postman, Swagger/OpenAPI, Redoc)
Frameworks & Platforms (Express.js, NestJS, FastAPI, Spring Boot, Laravel)
Authentication & Authorization (JWT, OAuth2, Passport.js, Firebase Auth)
Testing Tools (Postman, Jest, Supertest, Newman, Mocha)
Database Management (MongoDB, PostgreSQL, MySQL, Prisma, Sequelize)
Code Quality & Linting (ESLint, Prettier, SonarQube)
Monitoring & Logging (Prometheus, Grafana, ELK Stack, Sentry, LogRocket)
Agile & Scrum Methodology