I specialized in the Frontend area. Have been working in the frontend development for more than 2 years now. React and vue is my daily bread :)
I have been learning Backend Development for more than 6 months now. I mainly uses Golang or Python for server logic and API.
For Versioning, I have always used git. For Deployment, most of the time I will be using services from AWS (amplify, ec2, route53, beanstalk, etc)
I have tried both SQL and NoSQL for database and deployed it to server
SQL: PostgreSQL, MySQL
NoSQL: MongoDb