JavaScript Developer: responsibilities, education, skills and career path

Builds web and server applications with JavaScript across frontend, backend (Node.js) and tooling.

Entry

Intermediate

Coding

Very High

Key skills

JavaScript (ES6+)Node.js / ExpressGitReact / Vue

Common progression

JavaScript Developer
Senior Software Engineer

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Career overview

The JavaScript Developer lives across the whole JavaScript ecosystem: frontend frameworks, Node.js backends, build tooling, serverless functions. JavaScript runs everywhere now, which makes this one of the most flexible developer roles. The path leads to senior software engineering, technical lead or full stack positions, often with a strong TypeScript dimension.

Main responsibilities

Develop applications with JavaScript and Node.js
Build user interfaces with modern frameworks
Design and document REST APIs
Write, test and review production code
Write unit and integration tests
Refactor legacy code and reduce technical debt
Build and maintain CI/CD pipelines
Keep technical documentation up to date
Mentor junior team members and review their work
Prepare and execute change requests in production

Technical skills

JavaScript (ES6+)92%

Node.js / Express85%

React / Vue82%

REST / GraphQL APIs78%

Testing (Jest/Mocha)70%

Docker65%

CI/CD65%

Git85%

Web performance70%

TypeScript basics72%

Technologies

JavaScriptNode.jsExpressNestJSReactVueTypeScriptGraphQLRESTPostgreSQLMongoDBRedisDockerKubernetesAWSGitJestViteLinux

Education level

Education requirements vary depending on the company, country and experience. Professional experience, certifications and technical skills can sometimes compensate for formal education.

High School / Bac

Less common

Bac+2 (2-year degree)

Common entry point

Bac+3 (Bachelor)

Common entry point

Bac+5 (Master / Engineering)

Common entry point