Hermann YAO

– Full-stack technical lead from architecture design to delivery on a critical business system. – Designed hexagonal : DDD architecture with API-first approach, backend implemented in Java/ Spring Boot, Open api. – Built React 18 + TypeScript frontend (Material UI, React Query, Axios) used by 200+ employees. – Security Integration and customization of Keycloak, implementation of the client app Backend in Spring (boot, Security, Rest), JWT, Nginx/Caddy proxy. – CI/CD pipelines with GitHub Actions, automated tests, Docker/Docker Compose → 10-minute deployments. – Event-driven supplier notification system via Kafka (real-time processing).

– Developed Java 17/Spring Boot REST APIs with financial logic and third-party integrations. – React workflow UI + Angular KYC module used by 150+ business users. – API standardization, Open api, systematic code reviews, 85%+ automated test coverage. – Close collaboration with product and business teams in agile setup. – SGEF, 0 major production incidents over 16 months.

– Designed AWS serverless architecture (Java Lambdas + DynamoDB) → 99.9% SLA. – Angular document management interface used by 300+ internal users. – Infrastructure as Code using Terraform. – Automated GitLab CI/CD → deployment time reduced from 2h to 20 min. – 40% performance improvement in document processing. – 10,000+ documents processed daily.

– Java/Spring + React full-stack development. – Docker + Kubernetes/OpenShift deployment → 99.5% availability. – Reduced minor production incidents by 60%. – Mentored junior developers and improved engineering practices. – Model Risk Tool, 60% reduction in minor incidents.

– Worked across various companies including IFS.alpha (BNP), Wipro Digital (London), La Poste (Digiposte), SGCIB, Allianz, BNP, Crédit Immobilier de France, Bouygues Telecom. – Focused on architecture, cloud migration, DevOps, and technical leadership. – Domains: Banking, Insurance, Telecom, Industry.