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Infinity Quest

Back End Developer

Hybrid

Brussels region, Belgium

Senior

Freelance

27-11-2025

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Skills

Java JavaScript TypeScript HTML CSS NoSQL CI/CD Docker Kubernetes Databases apache git angular AWS Postman Spring Hibernate Nginx Spring Boot CI/CD Pipelines Kafka Microservices

Job Specifications

What will you be doing in this role?

Development of back-end website applications
Integration of user-facing elements developed by a front-end developer with server-side logic
Implement core business logic
Creation of servers and databases for functionality
Design and implementation of data storage solutions
Understanding and implementation of security and data protection
Optimization of the application for maximum speed and scalability
Design and develop APIs
Participating in the design and creation of scalable software
Taking lead on projects, as needed
Maintenance of code integrity and organisation
Writing clean, functional code on the back end
Compile and analyse data, processes, and codes to troubleshoot problems and identify areas for improvement
Testing and fixing bugs or other coding issues
Meet both technical and consumer needs
Write technical documentation

Requirements

What you need to succeed in this position:

BSc degree in IT and at least 11 years of experience, or MSc degree and minimum 7 years experience
Proficiency in backend development using Java8+, including Spring, Spring Boot, Hibernate and Java EE
Experience with REST APIs and SOAP Webservices
Experience with Oracle DB and RDBMS technologies such as Oracle
Familiarity with NoSQL databases (plus)
Knowledge of frontend technologies: JavaScript, TypeScript, HTML, CSS and Angular (plus)
Experience with messaging systems such as JMS, Kafka and ActiveMQ
Knowledge of development, building and deployment of microservices
Experience with OpenID Connect integration and SSO
Knowledge of API Gateway configuration with OAuth 2
Knowledge of SSL/TLS Protocol configuration in application servers
Knowledge of reverse proxy configuration
Experience with Oracle WebLogic Server, including configuring domains, deploying and running applications
Knowledge of Apache and Nginx
Experience in Cloud development using Amazon Web Services (AWS)
Knowledge of containerization technologies such as Docker
Familiarity with container orchestration tools such as Kubernetes (plus)
Knowledge of CI/CD pipelines and Continuous Integration & Deployment tools such as Bamboo
Experience with code versioning tools such as Git
Experience with web services testing tools: SOAPUI, ReadyAPI and Postman
Ability to understand, speak and write English at level B1 is mandatory. French at B1 would be an asset

About the Company

Infinity Quest (IQ) with its roots from Staffing and Recruitment provides world class business solutions to our valued customers. We specialise in Professional Services, SAP, Salesforce and RPA. Our team of experts understand the challenges you face every day and provide simple technology driven solutions to your complex problems. We have over 15 years experience within the professional services & technology services industry and have catered to wide variety of clientele from SMEs to global corporations. At IQ we are dedicat... Know more