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TRIJIT

Java Application Developer

Hybrid

Brussels region, Belgium

Freelance

09-05-2025

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Job Specifications

Description
Role
As a medior developer, the candidate will join a mixed Agile team developing features for a pension simulator. The developer will work within the Exsyspen team, responsible for simulations for the policy research department to provide data useful for decision-making.

Main responsibilities include developing and maintaining Java applications, collaborating with development teams to integrate new features, participating in code reviews and testing, resolving technical issues, and optimizing performance. The developer will also be responsible for keeping up with technological advancements in Java and providing necessary data for policy research.

More specifically, the role involves coding for:

Functionally:

Separation between socio-economic simulation and benefit calculations.

Integration of the constant public population model and probabilistic model.

Publication of simulations on pension Stat.

Technically:

Software upgrades (including migration to Java 21).

Integrated deployment of both the Toolkit (Framework) code and the simulation code.

Required Skills
Java

Git

Jenkins

Agile methodology

Cassandra

Vert.x

Advanced SQL

XLDeploy

Linux

Dynatrace

CI/CD

Maven

TDD

Jira

CQL

Experience with microservices and distributed architectures (preferred)

Candidate Requirements
Ability to work in a team

Clear communication skills

Proactivity and autonomy

Problem-solving abilities

Strong critical thinking

Knowledge of best practices in Java application development

Ability to set priorities

Good organizational skills

Ability to document work

Ability to manage priorities and work under pressure

Adaptability and flexibility to change

Selection Criteria
Over 15 years of experience in Java development

5+ years of experience with Git

5+ years of experience with Jenkins

5+ years of Agile methodology experience

At least 2 years of experience with Cassandra

In-depth knowledge of Vert.x, SQL, XLDeploy, Linux, Dynatrace

CI/CD experience

Ability to coach junior developers

Proven autonomy and strong critical thinking

Knowledge of microservices and distributed architectures

Business knowledge of employee and public sector pensions (a strong plus)

Additional Requirement:
In their CV, the candidate must briefly explain the contribution of Vert.x in the context of a simulation tool.

On-site Presence:
The mission requires at least 2 days per week on-site at the SFP offices in Brussels.

Roles
Expert Application Developer

Languages
Dutch: Native

English: Active knowledge

French: Passive knowledge

About the Company

Trijit provides Staffing & Recruitment along with IT Consulting Services across USA, UK, Europe & India to our valued customers. We specialize in Staffing, Recruitment, IT Services & Consulting. We have over 15 years of experience within Recruitment | Staffing | IT Consulting and have catered to wide variety of clientele from SMEs to global corporations. We have a well-oiled machine in place, where we have a dedicated and experienced team at your disposal. We specialize in providing Staffing & Recruitment Services in Info... Know more