Level path

Full-stack Practitioner

FSE

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

Total concepts 281

Curated for this specific career level.

Specific to this level 2

Concepts explicitly listed in this level.

Knowledge tracks 6

Concepts span multiple tracks and layers.

Job description signals Typical responsibilities

Deliver user-facing features across frontend, backend, API, and persistence layers.
Make pragmatic tradeoffs across UX, service design, data modeling, and delivery speed.
Coordinate end-to-end testing, release readiness, and production support for full product slices.
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 SEFE / Junior FEBE / Junior BEFSE / Junior FSEDev / DevSE / Mid SEFE / FEBE / BE

Specific to this level 2 Cumulative 281

Track / layer mastery Concept coverage by layer

Product

1 concepts

Web Applications 1

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Software

1 concepts

Programming Languages 1

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Software

166 concepts

Software Design 41 Programming 25 Programming Languages 18 Databases 18 System Design 16 Algorithms & Data Structures 12 Computer Networks 11 Software Architecture 9 Security 7 Quality Assurance 6 Distributed Systems 2 Operating Systems 1

Product

58 concepts

Web Applications 28 API Products 19 Developer Tools 11

OPS

Operations

31 concepts

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

MGT

Management

20 concepts

Business Foundations 10 Requirements & Planning 6 Delivery Methodologies 2 Product Discovery 1 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

Frontend + Backend Foundations

Build enough depth on both sides of a web application boundary.

TypeScript Software · Programming Languages new React Product · Web Applications 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.