Web Developer and Web Service API Consultant

Keystone Solutions; Town of Belgium (WI); Hybrid; USD 54,000 - 82,000; Full time

Job summary

Keystone Solutions is seeking a Web Developer and Web Service API Consultant to join a client site team, delivering agile and high-performance software solutions as part of the DECOM program.

The role focuses on migrating police data from mainframes to a modern open architecture, building REST APIs, PHP/JavaScript components, and integrating AI and ILP features while adhering to security and DevOps practices.

Qualifications

• Experience in RESTful API development and web services.
• Ability to design software architecture.
• Fluency in French or Dutch with passive knowledge of the other language.

Responsibilities

• Develop APIs and web services within the DECOM program for data migration.
• Design data exchange services and REST APIs for integrating police applications.
• Enhance PoliceSearch and PolLogs with analytics, AI, and ILP features.
• Build components in PHP and JavaScript and define technical architecture.

Skills

API REST

Software architecture

OAuth/OpenID/JWT

Containerization

Design patterns

JavaScript development

PHP development

DevOps, MLOPS, GitLab

Application security

SQL NoSQL PostgreSQL

Automated testing

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 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 PoliceSearch and PolLogs, 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
• 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