Payplug
Current
After acquisition of Payplug and Dalenys by BPCE. My work was to bridge gaps between their stacks, unify authentication & permissions system, add OAuth2 integration for users and plugin (Prestashop, Shopify), and migrate users from the legacy monoliths to microservices.
- Unified Authentication: Integrated Ory Stack (Kratos for identity/MFA, Hydra for OAuth2 flows/auto-registration, Keto for granular RBAC/ABAC permissions).
- OAuth2 Portal: Built a self-service portal for internal integrations and CMS plugins (PrestaShop, Shopify) with automated client registration.
- Migration Strategy: Gradual account migration schema from monolith.
- Observability: Full telemetry using Datadog & OpenTelemetry (traces, spans, correlated logs).
Back Market
Context: Engineered high-stakes compliance pipelines for the Finance Team to meet the European DAC7 directive, requiring strict reporting of marketplace transactions in a deterministic format.
- Airflow Pipelines: Designed complex DAGs to transform ledger transaction data into the DAC7 regulatory format.
- Data Engineering: Implemented logic for mapping, normalization, validation, and enrichment of massive financial datasets.
- Infrastructure: Optimized execution on Google Cloud Composer, managing volume and monitoring pipeline stability.
- Compliance: Collaborated with Finance/Legal teams for final data validation.
Shadow
Context: Transitioned the cloud gaming platform from B2C to B2B SaaS following the acquisition by Octave Klaba. I worked on the core subscription lifecycle to support multi-VM rentals and enterprise fleets.
- B2B Features: Extended architecture to support Organizations, multi-machine fleets, and granular roles/permissions.
- Event-Driven: Orchestrated the "Subscription → VM Activation → Billing" flow using async events to ensure consistency.
- Lifecycle Management: Handled activation, suspension, termination, and payment retries.
- Tooling: Developed a Vue.js dashboard to visualize and retry asynchronous Redis Queue (RQ) jobs.
Carrier
Context: Modernized thermodynamics simulation tools (previously desktop/VM based) into a real-time collaborative web platform (similar to Miro) where users can connect Modelica components via drag-and-drop.
- High Performance: Built an ASGI FastAPI backend with WebSockets and Redis to sync user actions (cursors, movements) at 20 FPS with a non-blocking event loop.
- Graph Database: Solved massive file duplication (Modelica libs are 2-4GB) by parsing libraries into a Neo4j semantic graph, enabling versioning and optimized traversal.
- Leadership: Lead a team of 5 developers, managing code reviews and cross-timezone organization.
- Cloud: Deployed via AWS Elastic Beanstalk (Docker) and AWS Lambda for parallel ingestion.
Other
A history of delivering tailored Python solutions for startups, focusing on backend systems, automation, and compliance tools.
- Exomind: Developed a compliance engine (XCCDF) with custom parsers/runners to validate workstation configurations.
- Memorandum: Lead backend support for a kids' entertainment startup. Built a user monitoring dashboard, containerized microservices, and handled CI/CD.
- Automation: Built web scrapers (Selenium) for sports data, automated invoice apps (Qt), and marketing data extraction tools.
Teaching
Instructor for MSc students pursuing engineering degrees in Data Science and Computer Science.
- Taught Machine Learning (XGBoost, SVC), Deep Learning (Keras, CNN/RNN), and Web Scraping.
- Mentored students through practical Python/R projects and introductions to Docker/Kubernetes.