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# Back End Software Engineer

- **Company:** Uni Systems
- **Location:** Brussel, Belgium
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, Application Programming Interfaces (APIs), Amazon Web Services, Business Logic, Application Performance Management, Unit Testing, Microsoft Azure, Cloud Computing, Software Quality, Code Review, Databases, CouchDB, Data Validation, Data Security, Relational Databases, Database Storage Structures, Software Debugging, Programming Tools, Web Development, Hibernate (Java), Python (Programming Language), PostgreSQL, MongoDB, MySQL, Node.Js, NoSQL, OAuth, OpenID, Oracle (Applications), Openid Connect, Swagger, Subversion, Web Applications, Web Services, Openapi, Trunk-based Development, Data Logging, Freeform SQL, Spring-boot, Backend, Git Flow, Integration Tests, Kubernetes, Information Technology, Cosmos DB, Software Coding, Restful APIs, Splunk, Software Version Control, Dynatrace, Serverless Computing, Docker, Service Stack, Legacy Systems
- **Published:** October 23, 2026
- **Apply:** https://www.adzuna.be/details/5937667908

## About the Role

* Minimum Master's degree (EQF Level 7) with at least 5 years of IT experience, a Bachelor's degree (EQF Level 6) with at least 7 years of IT experience, or a secondary education diploma granting access to higher education with at least 12 years of professional IT experience.
 * Proficiency in back-end development with Python and experience working with frameworks such as Spring Boot, Hibernate, and Node.js.
 * Strong understanding of the full web development lifecycle, programming concepts, development tools, and best practices.
 * Experience with Application Performance Monitoring (APM) tools such as Dynatrace, Splunk, and Elastic APM, with knowledge of OpenTelemetry for metrics, logs, and distributed tracing.
 * Strong experience with relational databases, including PostgreSQL, Oracle, and MySQL, with the ability to write complex SQL queries and design efficient database structures.
 * Knowledge of NoSQL databases such as MongoDB, CouchDB, and Cosmos DB, including consistency and performance considerations.
 * Experience with version control systems and development workflows, including GitFlow, trunk-based development, and exposure to legacy systems using SVN.
 * Experience designing, developing, documenting, and securing RESTful APIs and web services, including the use of OpenAPI/Swagger.
 * Knowledge of containerization and orchestration technologies such as Docker and Kubernetes.
 * Understanding of authentication and authorization standards, including OAuth 2.0, OpenID Connect (OIDC), JWT, and EU Login.
 * Experience working with and strong understanding of the i2 technology stack.

One of the following or an equivalent certification:

 * AWS Certified Developer
 * Associate, Microsoft Azure Developer Associate, or CNCF Certified Kubernetes
 * Application Developer (CKAD).

## Description

* Develop and maintain back-end web applications, services, and business logic.
 * Design, develop, and optimize APIs and server-side functionality.
 * Integrate front-end components with back-end systems and databases.
 * Design and implement efficient, scalable, and secure data storage solutions.
 * Apply security best practices, including input validation, authentication, authorization, secure storage, logging, and monitoring.
 * Ensure application performance, scalability, and reliability through continuous optimization.
 * Participate in the design and development of scalable software solutions.
 * Maintain clean, organized, and high-quality code following established coding standards.
 * Analyze, troubleshoot, and resolve application issues through code review, monitoring, and debugging.
 * Perform unit and integration testing, validate code changes, and ensure software quality.
 * Deliver solutions that meet functional and non-functional requirements and user expectations.
 * Create and maintain technical documentation.
 * Configure and support cloud-based back-end services, including serverless functions, storage services, and managed Kubernetes environments.
 * Implement and maintain authentication and authorization mechanisms to secure APIs and services.
 * Develop and maintain automated unit and integration tests within CI/CD pipelines.