Web Developer and Web Service API Consultant

Keystone Solutions; Belgique; Remote; EUR 47,000 - 69,000; Full time

Job summary

Keystone Solutions is seeking a Web Developer and Web Service API Consultant to join a client-site team working on agile processes (Scrum, DevOps, CI/CD) to design high-performance, scalable software solutions. You will develop PHP and JavaScript components, build data-exchange services with REST APIs, and help modernize data for PoliceSearch, analytics, AI, and ILP.

Fluency in French or Dutch is required, with passive knowledge of the other language; on-site work in Belgium for a two-month

Qualifications

• Experience with API and web services development.
• Ability to design data exchange services and REST APIs.
• Proficiency in PHP and JavaScript development.
• Knowledge of DevOps practices and security-by-design concepts.
• Familiarity with SQL/NoSQL PostgreSQL databases.
• Ability to implement automated tests and quality checks.

Responsibilities

• Participate in development and evolution of applications, APIs and web services.
• Design data exchange services and REST APIs for police applications.
• Enrich PoliceSearch and PolLogs with AI/ILP features.
• Develop components using PHP and JavaScript and help define the technical architecture.

Skills

API REST

Architecture

OAuth/OpenID

Containerization

Design patterns

JavaScript

PHP

DevOps

Security by design

SQL/NoSQL PostgreSQL

Automated tests

Job description

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, DevOps, 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 PoliceSearch, analytics solutions, artificial intelligence (AI), and Intelligence-Led Policing (ILP).

Key Responsibilities:

• Participate in the development and evolution of applications, APIs, and web services as part of the DECOM program.
• Conduct technical analysis, design, and develop data exchange services and REST APIs for integrating various police applications.
• Adapt and enrich strategic solutions such as PoliceSearch and PolLogs, integrating new features related to data analysis, AI, and ILP.
• Develop application components using PHP and JavaScript, contribute to defining the 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 abilities
• Autonomy
• Self-learning
• Quality orientation

Language Skills:

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

Why Join Keystone Solutions:

As a consultant at Keystone Solutions, you will work on-site, tackling diverse challenges across various client environments. This role offers turbo-charged learning opportunities and a commitment to your career growth within our framework. Being a

Duration:

01/11/2026 - 31/12/2026 2 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
• DevOps, MLOPS, GITLab - Level: Confirmed - Most recent: Any time
• Sécurité applicative, Security By Design - Level: Confirmed - Most recent: Any time
• SQL/NoSQL/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