Backend Engineer based in Paris (MSc Computer Science, EPITA), with a Python and Node.js core and hands-on range into Java/Spring Boot and AI/LLM systems. I build production-grade APIs, multi-tenant platforms, and security-conscious systems that hold up under real institutional constraints, from government identity verification to fintech and SaaS.

My background spans fintech, government platforms, and SaaS, with direct exposure to cloud infrastructure, PostgreSQL at scale, and hands-on production security incident response.

• Backend: Python, Node.js, Java (Spring Boot), TypeScript, FastAPI, Django, Flask, Laravel
• Databases: PostgreSQL (modelling, query optimisation, indexing), Redis, MySQL, MongoDB
• Cloud & DevOps: AWS (ECS, RDS, S3, Lambda, CloudWatch, EventBridge), Docker, Kubernetes, Terraform, GitHub Actions, GitLab CI/CD
• Security & Privacy: OAuth 2.0, OpenID Connect (OIDC), JWT, AES-256-CBC, RBAC design, OWASP Top 10, GDPR/NDPR compliance, threat modelling (STRIDE, LINDDUN), production incident response
• AI & LLM: OpenAI API, Retrieval-Augmented Generation (RAG), vector embeddings, Pinecone, prompt engineering
• Data & Observability: ETL pipelines, Databricks, telemetry processing, SQL optimisation, monitoring & alerting
• Frontend: React, Next.js, Vue.js, TypeScript, Tailwind CSS

FarmerMoni Data Revalidation System (Government-commissioned) Independently designed, built, and deployed a national beneficiary identity verification platform for Nigeria's GEEP programme under NSIPA. 50,000+ beneficiaries across 36 states and the FCT, 5 Nigerian languages, 8 role-based access tiers, AES-256-CBC encryption, and full incident response following a production security breach.

Lenal — Logistics Dispatch Platform (Active beta) Production logistics backend built with FastAPI, SQLAlchemy, PostgreSQL, and Docker. Multi-tenant architecture with role-based access, full delivery lifecycle management, event sourcing for audit trails, and JWT/phone-based auth. Designed offline-first (USSD/SMS) for the Kaduna, Nigeria market, with real businesses in active beta.

DocuMentor — AI Document Intelligence Platform (EPITA MSc Thesis, Co-Founder) Co-founded and built a Retrieval-Augmented Generation (RAG) pipeline from ideation through delivery: PDF parsing and chunking, OpenAI embeddings, Pinecone vector search, and GPT-3.5 for context-aware answers with streamed responses.

Eventure — Event Management Platform Built RESTful APIs in Java Spring Boot for event and participant management, within a polyglot backend (Spring Boot + Node.js) routed through a shared API gateway, with OpenID Connect authentication.

Fulfulde Language App (Founder, 2020 – Present) Founded and independently run a consumer product supporting the preservation and revival of Fulfulde, a West and Central African language facing declining intergenerational transmission. Android app with a Python (Flask) backend, 50K+ Play Store downloads, NPS-driven feedback loop with a growing community of contributors.

NaijaFR Store Fullstack e-commerce platform built with React, Node.js, and MongoDB: authentication, product management, order workflows, and PayPal integration.

• Building Lenal, with real clients in active beta
• Open to backend, platform engineering & security engineering roles (CDI) in Paris
• AWS Solutions Architect – Associate (in progress)
• Kubernetes KCNA — Andela African Developer Program (March 2026, in progress)

• 🌐 Portfolio: marwanmai.com
• 💼 LinkedIn: linkedin.com/in/marwan-mai
• 🛠️ Freelance: Binary IT Solutions
• 📧 Email: emef4z@gmail.com