Lead Implementation Consultant – Card Payments

ESTREEM

Lead implementation consultant guiding complex payment-platform integrations for European banks at Estreem. Owning functional domains, client testing, migration, and delivery-method improvements.

Posted 8/4/2026full-timeParis • 🇫🇷 FranceSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in leading ERP/SaaS implementation projects, with a strong focus on client engagement, functional specifications, and integration testing. Proficient in payment schemes and transaction lifecycles, with the ability to mentor teams and improve operational efficiency.

Highest-signal resume keywords

ERP/SaaS ImplementationClient-Side Project ManagementCard Payments Domain ExpertiseFluent French (C2)REST APIs and JSON Knowledge

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Implementation LeadFunctional SpecificationsIntegration TestingTransaction Lifecycle UnderstandingPayment Schemes KnowledgeAuthorization FlowsFile-Based FlowsTesting Tools (Postman)Configuration SetupAgile Methodology

Soft Skills

Stakeholder ManagementWorkshop FacilitationMentoring Junior ConsultantsCollaborative MindsetProactive Approach

Tools & Technologies

SFTPJSONXMLREST APIs

Certifications & Qualifications

Master’s Degree in Engineering or Computer Science

Industry Keywords

Financial SectorBanking SectorCard IssuanceAcquiringDisputes/Chargebacks

Tech Stack

Tools & technologies

ERPFlux

About the role

Key responsibilities & impact

Lead implementation projects as the Implementation Lead
Facilitate functional and technical scoping workshops to understand client requirements
Support clients in building proficiency on the platform
Work with the Product team to prioritize and resolve functional gaps
Draft and own functional and integration specifications
Coordinate technical topics with Technology teams
Drive support for client test phases, including configuration, connectivity and test execution
Oversee defect triage and coordinate issue resolution
Act as the primary client contact and escalation point for sensitive functional matters
Identify deviations from the standard and scope change requests
Support data and transaction flow migrations
Ensure handover to Customer Success teams
Advocate for the client with Product and Technology teams
Coordinate projects with Customer Delivery Managers
Document best practices and develop delivery templates and guides
Continuously improve the operational efficiency of the Professional Services offering

Requirements

What you’ll need

Master’s degree (or equivalent) in Engineering, Computer Science or a related field
Fluent French (C2)
Professional working proficiency in English (B2–C1)
More than 6 years’ experience in consulting, integration or implementation of ERP/SaaS projects in the financial or banking sector
Proven experience on client-side implementation projects, including testing, integration and user acceptance testing (UAT)
Essential experience in at least one card payments domain: issuance, acquiring or disputes/chargebacks
Strong understanding of the transaction lifecycle in at least one domain
Solid understanding of payment schemes: Visa, CB (Cartes Bancaires), Mastercard and Wero
Understanding of authorization flows, settlement and the dispute lifecycle
Good knowledge of REST APIs and JSON and XML formats
Ability to read and challenge functional and technical specifications
Understanding of file-based flows and secure transfer protocols, including SFTP
Familiarity with testing tools, in particular Postman
Experience setting up test environments and configuration
Ability to lead workshops, explain concepts, structure discussions and provide reassurance
Stakeholder management on complex accounts
Ability to clearly present risks and trade-offs with options
Ability to mentor and upskill junior consultants
Ability to operate in an Agile, fast-paced and highly transforming environment
Rigour, autonomy, a collaborative mindset, transparency and a proactive approach

Benefits

Comp & perks

Time Savings Account (Compte Épargne-Temps - CET) option available
SWILE meal card (employee meal vouchers)
Sustainable mobility allowance (FMD)
Employee savings and profit-sharing schemes: PEE, PERCO, profit-sharing (intéressement) and employer matching (abondement)
Position open to candidates with disabilities
Every candidate is welcomed with respect and care