Specialist Implementation Consultant – Card Payments

ESTREEM

Consultant implémentation monétique chez Estreem, fintech de processing de paiements. Accompagnement des banques sur intégration, tests, validation et résolution d’anomalies.

Posted 8/4/2026full-timeParis • 🇫🇷 FranceJuniorMid-LevelWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in client-side implementation projects, focusing on testing, integration, and functional/technical validation. Proficient in analyzing REST API exchanges and familiar with payment schemes and the card payments domain.

Highest-signal resume keywords

Master's Degree in Engineering or Computer ScienceFluent French (C2)Experience in QA, Testing and ValidationUnderstanding of Application Integration and API ArchitecturesKnowledge of Postman and Payment Simulators

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

QATestingValidationIntegrationApplication SupportAPI DocumentationREST API AnalysisPayment SchemesSFTPJSON and XML Formats

Soft Skills

Strong Communication SkillsAttention to DetailAutonomyOwnershipCollaborative Mindset

Tools & Technologies

PostmanJiraXraySwagger/OpenAPIPayment Simulators

Industry Keywords

Card Payments DomainAuthorization FlowsSettlementDispute/Chargeback LifecycleClient-Facing Environment

Tech Stack

Tools & technologies

Flux

About the role

Key responsibilities & impact

Act as the technical specialist across the different phases of implementation projects: scoping, integration, testing/acceptance and go‑live
Participate in functional and technical scoping workshops to understand client processes and integration constraints
Identify potential product enhancements with the Product team
Guide clients in understanding the Estreem platform
Collaborate with the Documentation team to improve the documentation site
Prepare test environments, validate connectivity and configure the Estreem platform
Help clients assemble datasets and validate their test cases
Support execution of SIT and UAT campaigns using Postman and payment simulators
Verify results, analyze discrepancies and support investigation of identified behaviors
Handle client incidents: triage, reproduction, log and message flow analysis, documentation and resolution follow‑up
Collaborate with Technology, Product and Customer Delivery Managers
Represent the voice of the customer to internal teams
Contribute to structuring the team, working methods and Professional Services offerings
Continuously improve delivery practices based on feedback, incidents and best practices

Requirements

What you’ll need

Master’s degree (Bac+5) in Engineering, Computer Science or equivalent
Fluent French (C2)
Professional working proficiency in English (B2–C1)
2–5 years’ experience in QA, testing and validation, integration, application support or consulting/IT services roles with a strong technical component
Experience in client-side implementation projects, including testing, integration and functional/technical validation
Experience in the card payments domain (issuance, acquiring, disputes/chargebacks) is highly valued
Basic knowledge of payment schemes: Visa, CB (Carte Bancaire), Mastercard and Wero
Understanding of authorization flows, settlement and the dispute/chargeback lifecycle
Good understanding of application integration and API architectures
Familiarity with SFTP, Swagger/OpenAPI, webhooks and file exchange protocols
Ability to read and understand functional and technical specifications and API documentation
Ability to analyze REST API exchanges and JSON and XML formats
Knowledge of Postman and payment simulators is a plus
Familiarity with Jira, Xray or equivalent is a plus
Strong written and verbal communication skills in a demanding client-facing environment
Ability to structure work and report clearly
Comfortable interacting with operational, technical and project management stakeholders
Ability to work in an Agile environment
Attention to detail, autonomy, ownership, pragmatism, value-orientation and a collaborative mindset

Benefits

Comp & perks

Option to use a Time Savings Account (CET)
Swile card (meal vouchers)
Sustainable mobility allowance (FMD)
Employee savings plan (PEE)
Company retirement savings plan (PERCO)
Profit-sharing bonus
Employer matching contributions
Remote work up to 10 days per month, with a maximum of 3 days per week
Cadre-level status
Position open to candidates with disabilities