API Analyst

Keystone Solutions; Brussel; Sur place; EUR 70 000 - 95 000; Plein temps

Résumé du poste

Keystone Solutions is seeking an experienced API Analyst to join the Integration Team. You will translate architectural guidelines into API agreements, draft specifications, and guide teams in designing, publishing, and using APIs.

Your scope includes supporting governance, standardization, and aiding the composable architecture with reusable API building blocks across the application landscape.

Qualifications

• 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.
• Knowledge of integration principles, such as synchronous/asynchronous communication, event-driven integration, messaging, or middleware.
• Knowledge of ESB environments, preferably AXWAY and Fuse, and insight into API within broader integration architectures.
• Knowledge of composable architecture principles, with insight into how APIs, services, ESB platforms, and integration patterns contribute to a modular landscape.
• Experience with API governance, lifecycle management, version control, documentation, and reusability of services.
• Knowledge of API security (OAuth2, OpenID Connect, JWT, certificates, access control).
• Knowledge of Agile/Scrum and collaborating with development teams.

Responsabilités

• 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.
• Collaborate on API designs and integration choices with enterprise and solution architecture to ensure fit within principles and standards.
• Assist development teams in applying composable architecture principles, ensuring APIs, services, and patterns are reusable and manageable.
• Contribute to knowledge sharing, templates, and guidelines for API development within the team and organization.
• Collaborate on professionalization of the Integration Team as an enabling team for development teams.

Connaissances

Agile/Scrum collaboration

API analysis

API design

OpenAPI/Swagger

REST APIs

API governance

API security

ESB integration (AXWAY/Fuse)

Documentation and standards

Stakeholder communication

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