Full Stack Developer

Mission Overview:

We are seeking a Full Stack Developer for a consultancy mission at a client site, representing Keystone Solutions. The primary focus will be on the development of a new web application, 'Target 2', using Java and JavaScript, aimed at supporting the agents of the DGH, particularly hydrographers, as a replacement for the outdated 'Target 1' application.

Key Responsibilities:

• Develop interactions via web services with a business calculation engine written in Python.
• Implement interactions through a Datahup Denodo with external data stored outside the application.
• Facilitate interactions with a PostgreSQL database for application-specific stored data.
• Create a user-friendly, graphical, and secure interface.
• Develop a modern, secure, robust, and sustainable application that allows for the calculation, saving, updating, and visualization of the rating curves associated with the measurement stations of the Walloon hydrological network.
• Propose an intuitive, user-friendly, and well-documented interface to facilitate application usage.
• Ensure the application interfaces with existing databases and exchange channels within the DGH, necessary for its proper functioning.
• Establish sustainable maintenance of the tool, covering both back-end and front-end aspects.

Technical Environment:

Back-office Angular, API Spring Boot, PostgreSQL DB, Datahup Denodo, hosted by SPW Digital.

Soft Skills:

• Effective collaboration within an agile team.
• Autonomous.
• Pragmatic and results-oriented.

This position offers the opportunity to work on dynamic projects, providing a broad learning experience and professional development. As a consultant at Keystone Solutions, you will be part of a team that values ambition and growth, bringing our core values to every engagement.

If you are ready to tackle technical and strategic challenges in a dynamic consultancy environment, apply today at Keystone Solutions Career Portal.

Duration: 01/10/2026 - 14/06/2027 9 months • (full time)

Skills required:

• Architecture Logicielle
• (mandatory) - Level: T2 - Confirmed - Most recent: Any time
• Bases de données : expérience avec SQL, PostgreSQL
• (mandatory) - Level: T2 - Confirmed - Most recent: Any time
• Datahup Denodo - Level: T1 - Junior - Most recent: Any time
• Développement Back-End : Java & Spring Boot
• (mandatory) - Level: T2 - Confirmed - Most recent: Any time
• Développement Front-End : Angular, maîtrise de JavaScript, HTML5, CSS3, utilisation d’un design system
• (mandatory) - Level: T2 - Confirmed - Most recent: Any time
• DevSecOps : expérience avec les outils CI/CD (comme Jenkins, GitLab CI)
• (mandatory) - Level: T2 - Confirmed - Most recent: Any time
• Jira & Jira Xray - Level: T1 - Junior - Most recent: Any time
• Rédaction de documents techniques et fonctionnels
• (mandatory) - Level: T2 - Confirmed - Most recent: Any time
• Reprise de données d’une DB Oracle
• (mandatory) - Level: T2 - Confirmed - Most recent: Any time
• Scrum et Agile : expérience dans des projets Agiles et dans la méthode Scrum
• (mandatory) - Level: T2 - Confirmed - Most recent: Any time
• Sécurité des Applications : connaissance des meilleures pratiques de sécurité (OWASP)
• (mandatory) - Level: T2 - Confirmed - Most recent: Any time
• Web Services, REST API, RESTful API
• (mandatory) - Level: T2 - Confirmed - Most recent: Any time

Language requirements:

French
(mandatory)
Level Proficiency (C2)