Technical Business Analyst / API Designer

Project overview

As part of the evolution of its information system, we are currently looking for a Technical Business Analyst / API Designer to work with one of our clients in the banking sector, within a team dedicated to financing and factoring activities.

You will join a team responsible for the development and evolution of application services, as part of an API-fication program for the information system.

The work will focus in particular on the design and implementation of APIs around third-party management, whether they are clients or buyers.

You will work in a cross-functional environment, interacting with business teams, developers, and architects, with significant integration challenges and impact on the existing information system.

🎯 Your Role

As a Technical Business Analyst / API Designer, you will work at the intersection of functional needs and technical constraints.

You will be responsible for gathering and analyzing needs, designing application solutions, and formalizing them for development teams.

You will also contribute to the validation of developed services, through the preparation and execution of testing, as well as handling incidents and user requests.

Your Missions

📋 Needs Analysis & Application Design

You will support the teams in defining solutions adapted to business needs and architectural orientations:

🔗 API Design & Documentation

You will actively participate in the design of services exposed by the information system:

🧪 Functional & Technical Testing

You will be responsible for validating the developments carried out:

🛠 Application Support & Continuous Improvement

You will also contribute to the operational maintenance of services:

🧭 Functional & Technical Environment

🏦 Functional Domain

🛠 Technologies & Tools

• Gather and analyze user and stakeholder needs
• Define functional and technical solutions consistent with the target architecture
• Write application architecture diagrams
• Design flowcharts describing functional sequences
• Formalize User Stories and detailed functional specifications
• Contribute to discussions with architects and development teams
• Write API interface contracts
• Formalize service specifications and their exchange methods
• Document interfaces using OpenAPI 3 (OAS3) / Swagger standards
• Define and clarify business rules associated with services
• Support development teams in understanding specifications
• Prepare testing strategies and scenarios
• Design and execute test cases
• Test APIs using tools such as Postman or Insomnia
• Verify data in databases and web services
• Perform SQL checks and queries
• Use Excel for data analysis and verification
• Write and track anomalies until their resolution
• Analyze incidents and requests reported by users
• Participate in level 2 or 3 support activities
• Identify the causes of malfunctions
• Propose corrective solutions or workarounds
• Identify possible improvements to existing services
• Banking and financial services
• Financing and factoring
• Third-party management: clients and buyers
• API-fication of the information system
• Inter-application exchanges and business services
• REST API
• OpenAPI 3 (OAS3) / Swagger
• Postman / Insomnia
• SQL
• Excel
• Jira
• Confluence
• Agile Methods

Project details

• Start: flexible
• Remote: hybrid
• Location: 94220 Charenton-le-Pont, France, FR
• Rate: 60-65 EUR/h
• Languages: French