Integration & API Analyst – Railway Systems

Médiane Système; Brussel; Sur place; EUR 60 000 - 90 000; Plein temps

Résumé du poste

Médiane Benelux is seeking an Integration & API Analyst for a long-term mission in a critical IT environment focused on real-time railway data exchange and system integration. You will support API-driven data flows between internal and external platforms.

Responsibilities include designing API contracts, modelling data, and collaborating with developers, architects, and stakeholders to ensure secure, scalable integrations and quality outcomes.

Qualifications

• 5–10 years in API, integration, or functional analysis roles.
• Strong experience in data modeling and system integration.
• Proven background in Agile/Scrum environments.
• Experience in defining and managing user stories.
• API design: REST, SOAP, WSDL.
• API documentation: Swagger / OpenAPI.
• API testing: Postman or equivalent.
• Security: OAuth2, JWT.
• Data formats: XML, XSD, XPath.
• SQL and data querying.
• Programming knowledge: Java, .NET, or Python.
• Functional validation of integrations (test cases, scenarios).
• Root cause analysis for incidents and defects.
• Definition of non-functional requirements.
• French or Dutch: C2.
• Second national language: B2.
• English: C1.

Responsabilités

• Analyze integration needs and data exchange requirements.
• Collect, structure, and formalize data models and business rules.
• Design and document API contracts (REST, SOAP).
• Write detailed functional and technical integration specifications.
• Collaborate with developers, architects, and stakeholders.
• Define and execute API test scenarios and validation processes.
• Ensure compliance between implementations and defined contracts.
• Perform impact analysis on integrations and data flows.

Connaissances

API integration

Data modelling

Agile/Scrum

User stories

API design

Security: OAuth2/JWT

REST/SOAP/WSDL

Swagger/OpenAPI

XML/XSD/XPath

SQL

Java/.NET/Python

Root cause analysis

Non-functional requirements

English (C1)

French or Dutch (C2)

Formation

Bachelor's degree in Computer Science or related field

Outils

Postman

Description du poste

Médiane Benelux: Career Booster! Since 2017, and with over 35 years of experience in France and Italy, Médiane Benelux is an engineering company specializing in software, electronics, and cybersecurity across key sectors such as Railways, Automotive, Energy, Medical, Aerospace, Space, Telecoms, Industry, and Defense.

What We Offer

• IT consulting and strategy
• Digital transformation and IoT solutions
• Project management and process optimization

As specialists in electronics, development, and embedded systems design, we operate from sensor to cloud.

Why choose Médiane Benelux?

• Human-sized company: Promotes teamwork and collaboration in a dynamic and stimulating environment
• Sharp technical expertise and tailored solutions for each sector
• Talent support: Personalized follow-up, continuous training, and skill development for our employees
• Custom solutions tailored to the specific needs of each client
• Culture of innovation: Participation in innovative and varied projects
• Ecovadis Gold certification: Commitment to equality, well-being, and responsibility
• Human values: Commitment, Respect, Trust, Listening

"Happy at Work" and "Happy Clients" labels by Choose my Company: A fulfilling work environment and optimal client satisfaction

Job Description

We are looking for an Integration & API Analyst for a long‑term mission within a critical IT environment focused on data exchange and system integration. The role supports real‑time railway traffic systems, ensuring reliable, secure, and scalable data flows between internal and external platforms.

Responsibilities

• Analyze integration needs and data exchange requirements
• Collect, structure, and formalize data models and business rules
• Design and document API contracts (REST, SOAP)
• Write detailed functional and technical integration specifications
• Collaborate with developers, architects, and stakeholders
• Define and execute API test scenarios and validation processes
• Ensure compliance between implementations and defined contracts
• Perform impact analysis on integrations and data flows

Scope

• Data exchange across internal systems and external partners
• Real‑time and batch processing environments
• API‑driven architecture and service‑oriented integrations
• Multi‑stakeholder ecosystem including European platforms

Profile / Requirements

• 5–10 years in API, integration, or functional analysis roles
• Strong experience in data modeling and system integration
• Proven background in Agile/Scrum environments
• Experience in defining and managing user stories
• API design: REST, SOAP, WSDL
• API documentation: Swagger / OpenAPI
• API testing: Postman or equivalent
• Security: OAuth2, JWT
• Data formats: XML, XSD, XPath
• SQL and data querying
• Programming knowledge: Java, .NET, or Python
• Functional validation of integrations (test cases, scenarios)
• Root cause analysis for incidents and defects
• Definition of non‑functional requirements
• French or Dutch: C2
• Second national language: B2
• English: C1

Nice to Have

• Experience in integration impact analysis
• Experience in API documentation and data dictionaries
• Knowledge of railway or transport systems

Soft Skills

• Strong analytical and structured mindset
• Autonomous and proactive
• Clear communication with technical and business teams
• Ability to work in complex, multi‑stakeholder environments
• Resilient and team‑oriented

Benefits

Attractive salary package, additional statutory leave days, mobility package (car or public transport subscription), DKV health insurance, group insurance, meal vouchers, eco‑vouchers, etc