Freelancer profile translated to English.
Back to original languageAbout Julien
Stripe Consultant & Developer | Expert Stripe Connect
Audit, redesign, and payment architecture for marketplaces and SaaS platforms.
My audits in 2026 identified between+€15k and +€50k/year in recurring gainsfor my clients (digiSchool, Maxicours, Ventilo, CheckTaPaie, Load Stations).
✓ Stripe Professional Platform Architect & Developer (July 2026)
✓ 5x Certified Stripe (Architect & Developer)
✓ Ex-CTO x2 (raised €250k and exit)
✓ +20 Stripe missions
🎯 WHO I WORK WITH
- Marketplaces using Stripe Connect (Standard, Express, Custom, marketplace flows, customer onboarding, KYC)
- Subscription SaaS platforms on Stripe Billing (churn, dunning, recovery, subscription management, multi-country VAT) and AI SaaS with usage-based billing (credits, overages, metered billing)
- Founders, CTOs, and direct tech teams
💸 WHAT I DO
- Stripe Audits: architecture, webhooks, marketplace flows, compliance, quantified quick wins
- Implementation & Redesign: Stripe Connect (KYC onboarding, commissions, payouts), Stripe Billing (subscriptions, multi-country VAT, recovery)
- Custom Development: backend APIs, idempotent webhooks, custom plugins, Stripe integration
- Ongoing Support: external Stripe point of contact, architecture evolution, regulatory changes (SCA, ViDA 2026, Stripe Tax)
- Payment FinOps: Stripe cost optimization (payout fees, pricing structure, commissions)
- PSP Comparison & Migration: Stripe, Adyen, MangoPay, Mollie, Lemonway, Ryft..
📩 A project or question about Stripe?
Let's talk. You'll leave with concrete leads from the very first conversation.
French
Native or bilingual
English
Native or bilingual
Can work on-site
Lyon (up to 50km), Paris (up to 50km), Marseille (up to 50km), Toulouse (up to 50km)
Experience
- SEJER
On Malt
Stripe Expert – Klarna 3x Installment IntegrationEDUCATION AND E-LEARNINGApril 2026 - June 2026 (2 months)Lyon, FranceTechnical support for integrating Klarna's 3x interest-free installments on Maxicours EdTech platform's recurring subscriptions. Consulting and technical scoping mission to support the client's development provider.Missions completed:- Drafted a functional pilot summary (billing method, promo codes, freemium period, grace period, payment method update, cancellations) confirming Klarna's compatibility with existing Stripe mechanisms.
- Wrote a 30-page technical implementation guide for the development team: SetupIntent → Subscription flow, Stripe API version management per request, webhook configuration, promo codes, dunning, and test plan with test clocks.
- Designed two modeling patterns for the 24-month single payment offer (deferred payment via PaymentIntent vs. single-cycle subscription) with a reasoned recommendation on MRR cleanliness.
- Specified customer data required by Klarna (billing details, international format, scoring) and test data sets (approved/declined cases).
- Two technical video conferences and review of the integration produced by the provider before go-live.
- LOAD STATIONSStripe Expert – Audit, Architecture & SupportSOFTWARE PUBLISHINGApril 2026 - July 2026 (3 months)Nîmes, FranceStripe support for a SaaS provider of electric vehicle charging station monitoring and billing, operating a complex multi-account payment architecture (CPO/eMSP model, 6 tenant archetypes, roaming flow).Missions completed:
- On-site kick-off: meeting stakeholders (management, tech, accounting), mapping 5 payment flows (in/out roaming, subscribers, guests, businesses) and tenant payouts.
- Comprehensive Stripe audit (45-page report): event-driven architecture, data and metadata structuring, accounting reconciliation, payment methods, fraud & Radar, fee optimization, chargebacks.
- Identification of critical issues: absence of webhooks, unstructured Products/Prices catalog, cross-border tax risk, API key security.
- Design of the target Stripe Connect architecture (one connected account per tenant, application_fee, direct payouts) to structure the multi-tenant model.
- Prioritized action plan over three horizons (quick wins, structural projects, strategic projects) with estimated workload per project.
- Ongoing implementation for webhook setup, idempotency error correction, migration to Stripe Connect.
- CheckTaPaieStripe Connect Developer – Audit, Architecture & ImplementationHUMAN RESOURCESNovember 2025 - April 2026 (5 months)Lyon, FranceComplete redesign of a B2B SaaS platform's Stripe Connect architecture after an audit identified critical risks in financial flows, VAT, and webhooks. Migration from a WooCommerce stack + third-party plugins to a native Stripe Connect Express integration + Pennylane automated billing.Missions completed:
- Comprehensive Stripe/WooCommerce/WordPress audit: payment flows, payouts, VAT, webhooks, onboarding.
- Identification of critical risks in the payment architecture and remediation recommendations.
- Full implementation: Express onboarding, KYC, reliable webhooks, Pennylane API automated billing (5 invoice types, GP mandate, PDF sending).
- Architecture recommendation: Stripe Connect Express migration + SC&T, automated commissions and payouts, VAT by territory.
- Custom WordPress plugin development: Stripe Connect Express + Pennylane, auto-retry with exponential backoff.
Reviews
Recommendations
EM
+6
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Education
- Stripe ConnectStripe Training2025Architecture multipartie et implémentation Connect (Express, Custom) : onboarding KYC, flux de fonds, commissions, reversements automatisés, webhooks idempotents. Marketplaces et plateformes SaaS.
- Stripe BillingStripe Training2025Abonnements et recurring revenue : Payment Intents, Setup Intents, subscription schedules, dunning, migrations, test clocks. Gestion de la TVA multi-pays et conformité SCA/PSD2.
Certifications
- Stripe Professional Platform ArchitectStripe2026
- Stripe Professional Platform DeveloperStripe2026