Skills you need to be a backend developer
9 skills a hiring manager would actually test for, each with the level this role expects and what it is used for. Not a syllabus — the shape of the job.
Build my path to this roleUpskili checks what you can already do, then sequences only what is missing. No account needed.
What the role requires
Ordered by how much the job depends on it. The bar is the proficiency expected of a competent backend developer — not mastery, and not a passing acquaintance.
-
Java
Essential
Primary language for building and maintaining backend services.
Strong -
Spring Boot
Essential
Framework used to develop production REST APIs and microservices.
Strong -
SQL
Essential
Writing efficient queries and designing relational database schemas.
Strong -
REST API design
Important
Designing consistent, versioned, and secure HTTP APIs.
Strong -
Docker
Important
Containerizing applications for consistent development and deployment.
Strong -
Git
Important
Collaborating via branching, pull requests, and code reviews.
Strong -
Unit testing (JUnit/Mockito)
Important
Writing and maintaining tests to ensure code reliability.
Strong -
Kafka
Useful
Implementing asynchronous messaging between distributed services.
Working -
AWS (EC2, S3, RDS)
Useful
Deploying and monitoring services in a cloud environment.
Working
An order worth learning it in
A list of ten skills is the same unhelpful answer a catalogue gives, just sorted. This is where to actually start.
Start here
Essential to the role, and reachable from a standing start. Everything below rests on these.
- SQL
- REST API design
- Docker
- Git
- Unit testing (JUnit/Mockito)
Then this
The rest of what the role is assessed on. Harder, and it builds on the foundation above.
- Java
- Spring Boot
What sets you apart
Not what gets you hired, but what separates doing the job from being trusted with it.
- Kafka
- AWS (EC2, S3, RDS)
You almost certainly have some of this already.
That is the point of starting from the role rather than a course. Upskili checks what you can do, then builds a path across only the gap.
See my path to backend developer