Level path

Backend Practitioner

Own features and services with solid implementation judgment across neighboring layers.

Total concepts 247

Curated for this specific career level.

Specific to this level 33

Concepts explicitly listed in this level.

Knowledge tracks 6

Concepts span multiple tracks and layers.

Job description signals Typical responsibilities

Design and implement APIs, service logic, persistence boundaries, and core business workflows.
Improve backend performance, reliability, data correctness, security, and operability.
Own database access patterns, service integrations, and production debugging for backend systems.
Own features end to end from design through implementation, testing, release, and support.
Make local technical tradeoffs and explain them clearly to teammates.
Improve reliability, maintainability, and observability of the systems you touch.
Collaborate with product, design, QA, operations, and adjacent engineering teams.

Cumulative view includes

Dev / Junior DevSE / Junior SEBE / Junior BEDev / DevSE / Mid SE

Specific to this level 33 Cumulative 247

Track / layer mastery Concept coverage by layer

{}

Software

24 concepts

Databases 8 Software Design 6 Software Architecture 4 Programming Languages 3 System Design 2 Programming 1

Product

6 concepts

API Products 6

OPS

Operations

3 concepts

Runtime Infrastructure 2 Observability 1

{}

Software

160 concepts

Software Design 41 Programming 24 Databases 18 Programming Languages 16 System Design 15 Algorithms & Data Structures 12 Computer Networks 11 Software Architecture 9 Security 6 Quality Assurance 5 Distributed Systems 2 Operating Systems 1

OPS

Operations

31 concepts

Deployment 11 Build & Packaging 7 Observability 6 Runtime Infrastructure 4 Continuous Integration 2 Local Development 1

Product

31 concepts

API Products 18 Developer Tools 11 Web Applications 2

MGT

Management

19 concepts

Business Foundations 10 Requirements & Planning 6 Delivery Methodologies 2 Team Leadership 1

DATA

Data

3 concepts

Data Foundations 3

Theory

3 concepts

Algorithmic Analysis 3

Learning scope Concepts by learning area

Specific to this level

Concepts introduced by this level

Level concepts

Web & APIs

Understand how clients and servers communicate through stable service interfaces.

GraphQL Product · API Products working new gRPC Product · API Products working new API Gateway Software · System Design new Webhook Product · API Products new Service Boundary Software · Software Architecture new Shared Service Software · Software Architecture new Shared Library Software · Software Design new

Level concepts

Databases

Store, query, and reason about persistent data correctly and efficiently.

Transaction Isolation Software · Databases working new Foreign Key Software · Databases new Primary Key Software · Databases new Document Store Software · Databases new Key-Value Store Software · Databases new Column-Family Store Software · Databases new Graph Database Software · Databases new

Level concepts

Backend Design

Organize service code and boundaries so backend systems can evolve safely.

Hexagonal Architecture Software · Software Architecture working new Aggregate Software · Software Design new Aggregate Root Software · Software Design new Domain Entity Software · Software Design new Value Object Software · Software Design new Domain Event Software · Software Design new CQRS Software · Software Architecture new

Level concepts

Service Development

Build the capabilities needed for this area.

Schema Evolution Software · Databases new Node.js Software · Programming new Java Software · Programming Languages new Go Software · Programming Languages new C# Software · Programming Languages new Application Server Operations · Runtime Infrastructure new Web Server Operations · Runtime Infrastructure new RPC Product · API Products new SOAP Product · API Products new XML Product · API Products new System Workload Software · System Design new Traffic Metrics Operations · Observability new

Cumulative level expectation

All concepts expected at this level

Inherited path

Coding Foundations

Developers begin by learning to translate requirements into working, readable code.

Inherited path

Developer Tooling

Daily development depends on version control, language tooling, static checks, and repeatable local workflows.

Git Product · Developer Tools awareness Compiler Software · Programming Languages awareness Interpreter Software · Programming Languages Package Manager Operations · Build & Packaging Linting Operations · Build & Packaging Code Editor Product · Developer Tools CLI Software · Operating Systems Version Control Product · Developer Tools Dependency Operations · Build & Packaging Artifact Operations · Build & Packaging Development Environment Operations · Local Development Software Ecosystem Software · Programming Repository Product · Developer Tools awareness Commit Product · Developer Tools awareness Branch Product · Developer Tools awareness Pull Request Product · Developer Tools awareness

Inherited path

Testing & Debugging

A developer owns not only writing code, but proving that it behaves as intended.

Unit Test Software · quality-assurance awareness Debugger Product · Developer Tools awareness Error Handling Software · Programming Code Documentation Software · Software Design Software Testing Software · quality-assurance awareness Test Case Software · quality-assurance awareness

Inherited path

Software Systems Basics

Even implementation-focused developers need a working vocabulary for clients, servers, interfaces, web requests, and the lifecycle surrounding a change.