Web Developer and Web Service API Consultant

Mission Overview:

Keystone Solutions is seeking a Web Developer and Web Service API Consultant to join a dynamic team at a client site. This consultancy mission focuses on innovative and agile processes (Scrum, Dev Ops, CI/CD) to design high-performance and scalable software solutions.

Project Details:

The project aims to reduce dependency on mainframe systems by migrating BNG, BCE (KBO), and other police data to a modern open architecture. This migration will enhance data accessibility for applications such as Police Search, analytics solutions, artificial intelligence (AI), and Intelligence-Led Policing (ILP).

Key Responsibilities:

• Participate in the development and evolution of applications, APIs, and web services within the DECOM program, aimed at migrating police data to a modern open architecture.
• Conduct technical analysis, design, and develop data exchange services and REST APIs for integrating various police applications.
• Adapt and enrich strategic solutions such as Police Search and Pol Logs, integrating new features related to data analysis, artificial intelligence, and ILP.
• Develop application components in PHP and JavaScript, participate in defining technical architecture, and collaborate with development teams to ensure high-performance, secure, and interoperable solutions that meet operational needs.

Soft Skills:

• Attention to detail and rigor
• Problem-solving skills
• Autonomy
• Self-taught
• Quality orientation

Language

Skills:

Fluency in French or Dutch is required, with a passive knowledge of the second language.

Work Environment:

This position is full-time (40 hours/week) with a requirement to be present in the office at least twice a week, depending on tasks and in agreement with the team. Remote work is allowed from home or at the employer's location in Belgium. The team is multidisciplinary, consisting of a mix of internal and external collaborators.

Duration: 15/10/2026 - 31/12/2026 3 months (full time)

Skills required:

• API, Webservices REST - Level: Confirmed
  - Most recent:
  Any time
• Architecture logicielle - Level: Confirmed
  - Most recent:
  Any time
• Authentication (OAuth 2.0, OpenID Connect, JWT-Based Tokens - Level: Confirmed
  - Most recent:
  Any time
• Containerization - Level: Confirmed
  - Most recent:
  Any time
• Design Principles and patterns - Level: Confirmed
  - Most recent:
  Any time
• Développement JAVASCRIPT - Level: Confirmed
  - Most recent:
  Any time
• Développement PHP - Level: Confirmed
  - Most recent:
  Any time
• Dev Ops, MLOPS, GITLab - Level: Confirmed
  - Most recent:
  Any time
• Sécurité applicative, Security By Design - Level: Confirmed
  - Most recent:
  Any time
• SQL/No
  
  SQL/PostgreSQL - Level: Confirmed
  - Most recent:
  Any time
• Tests automatisés - Level: Junior
  - Most recent:
  Any time

Language requirements:

Dutch or French
Level Native
English
Level Active knowledge