API Analyst

Keystone Solutions; Brussel Hoofdstad; Sur place; EUR 60 000 - 90 000; Plein temps

Résumé du poste

Keystone Solutions is seeking an experienced API Analyst to join its Integration Team in Belgium. The role focuses on designing, standardizing, and managing APIs within an architecture that leverages AXWAY and Fuse ESB, while guiding development teams to publish well-documented, reusable APIs.

The API Analyst acts as an enabler rather than a developer, translating architectural guidelines into actionable API agreements, contributing to a composable, modular, and scalable application landscape.

Qualifications

• Experience with API analysis, design or integration analysis.
• Strong knowledge of REST APIs, API contracts and OpenAPI/Swagger.
• Understanding of integration principles, messaging and middleware.
• Familiarity with API governance and lifecycle management.
• Knowledge of API security concepts (OAuth2, OpenID Connect, JWT).

Responsabilités

• Support development teams in analyzing, designing, and documenting APIs.
• Draft and maintain API specifications (OpenAPI/Swagger).
• Monitor API standards, versioning, error handling and security guidelines.
• Participate in governance reviews aligning with architectural guidelines.
• Coordinate API designs with enterprise architecture and integration standards.
• Contribute to knowledge sharing, templates and guidelines for API dev.

Connaissances

Agile/Scrum with dev teams

API analysis & design

API governance & lifecycle

API security (OAuth2, OIDC, JWT)

OpenAPI/Swagger & API contracts

AXWAY & Fuse ESB knowledge

Integration principles & middleware

Functional & technical IT analysis

Outils

AXWAY

Fuse

Description du poste

Mission Overview

Our client is seeking an experienced API Analyst to join their Integration Team. This team supports the organization in designing, standardizing, managing, and further developing integration solutions and APIs within an integration landscape utilizing technologies such as AXWAY and Fuse. The role has a clear link to application, integration, and technology architecture: the API Analyst translates architectural guidelines into applicable API agreements for development teams. Additionally, the API Analyst contributes to a composable architecture by helping to define APIs as reusable, well-documented, and decoupled building blocks within the application and integration landscape. This role is explicitly not an API developer role, but an enabling role: the consultant guides, advises, and supports development teams in correctly and consistently designing, documenting, publishing, and using APIs.

Key Responsibilities

• Support development teams in analyzing, designing, and documenting APIs.
• Draft and maintain API specifications, for example in OpenAPI/Swagger.
• Monitor API standards, naming conventions, version control, error handling, security guidelines, and documentation quality.
• Actively participate in meetings between business analysts, functional analysts, development teams, architects, security, and operational teams.
• Analyze existing APIs and integration patterns and propose improvements, standardization, and reuse.
• Support API governance, including reviewing API designs and aligning with architectural guidelines.
• Coordinate API designs and integration choices with enterprise and solution architecture to ensure solutions fit within applicable architectural principles and integration standards.
• Assist development teams in applying composable architecture principles, ensuring APIs, services, and integration patterns contribute to a modular, reusable, and manageable application landscape.
• Contribute to knowledge sharing, documentation, templates, and guidelines for API development within the team and the organization.
• Collaborate on the further professionalization of the Integration Team as an enabling team for development teams.

Technical Skills and Experience

• Experience with functional and technical analysis within IT projects or software development.
• Experience with API analysis, API design, or integration analysis.
• Good knowledge of REST APIs, API contracts, OpenAPI/Swagger, and JSON.
• Good understanding of integration principles, such as synchronous/asynchronous communication, event-driven integration, message queues, or middleware.
• Knowledge of or experience with ESB environments, preferably AXWAY and Fuse, and insight into the role of APIs within broader integration architectures.
• Knowledge of composable architecture principles, with insight into how APIs, services, ESB platforms, and integration patterns contribute to a modular, reusable, and manageable application landscape.
• Experience with API governance, API lifecycle management, version control, documentation, and reusability of services.
• Knowledge of API security, such as OAuth2, OpenID Connect, JWT, certificates, access control, and secure API design.
• Knowledge of Agile/Scrum and experience collaborating with or within development teams.

Generic Skills

• Strong analytical skills and structured approach.
• Ability to connect with technical and functional stakeholders for consultation.
• Strong communication skills, both verbal and written.
• Support knowledge expansion for development teams.
• Client and service-oriented work.
• Result-oriented and sense of responsibility.
• Continuous improvement mindset.
• Ability to apply standards without losing sight of the pragmatics of project realization.

Duration: 21/09/2026 - 31/10/2027 14 months

• (full time)

Skills required

• Agile/Scrum samenwerking met development teams - Level: Confirmed - Most recent: Any time
• API-analyse en API-design, inclusief REST API’s - Level: Confirmed - Most recent: Any time
• API-governance, standaardisatie, documentatie en lifecycle management - Level: Confirmed - Most recent: Any time
• API-security, inclusief OAuth2, OpenID Connect, JWT of gelijkaardige concepten - Level: Junior - Most recent: Any time
• API-specificaties en API-contracten, inclusief OpenAPI/Swagger - Level: Confirmed - Most recent: Any time
• ESB-omgevingen en integratieplatformen, bij voorkeur AXWAY en Fuse - Level: Junior - Most recent: Any time
• Functionele en technische analyse binnen softwareontwikkeling - Level: Confirmed - Most recent: Any time
• Integratieprincipes, middleware, messaging of event-driven integration - Level: Confirmed - Most recent: Any time

Language requirements

Dutch

Level Active knowledge

English

Level Active knowledge

French

Level Active knowledge