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Javascript Developer
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Javascript Developer
Technology
OPTIMUS IT SERVICES
Brussels, België
1 weken geleden
Tot 24/9/2026
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Functieomschrijving
Key Responsibilities
Develop and maintain high-quality React-based frontend applications within an Agile squad.
Translate business requirements into clean, scalable, and maintainable code following software craftsmanship principles.
Design, build, and optimize high-performance, reusable, and reliable applications.
Contribute to backend development using
Java and Spring Framework
when required.
Collaborate with cross-functional teams to deliver end-to-end features across web, mobile, and cloud platforms.
Integrate applications with APIs and external data sources while ensuring performance, quality, and responsiveness.
Apply best practices such as
Clean Code, SOLID principles, Test-Driven Development (TDD), and refactoring
.
Write and maintain automated tests using
Jest
and
React Testing Library
.
Participate in Agile ceremonies, pair programming, code reviews, and continuous improvement initiatives.
Identify, troubleshoot, and resolve application bottlenecks and production issues.
Experience Required
8+ years
of experience as a
React Developer
or Frontend Software Engineer.
Strong expertise in
Core JavaScript
and
React
.
Proven experience with
Git
,
Jest
, and
React Testing Library
.
Strong understanding of
Clean Code
,
SOLID principles
,
Design Patterns
, and
Test-Driven Development (TDD)
.
Experience working in
Agile/Scrum
development environments.
Experience with
Java, Spring Framework, Maven, and Databases
is a strong advantage.
Knowledge of authentication processes and secure application development is preferred.
Bachelor's or Master's degree (or equivalent experience).
Strong English communication skills (Dutch or French is a plus).
Keywords
monthsOfExperience: 96
ReactOS
Spring Framework
MAVEN
JavaScript
Pair Programming
Scrum
Java
SOLID
Test-driven development
Git
React.js
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