I design and build resilient, secure, and scalable backend systems — especially in fintech and enterprise environments.
My work spans authentication systems, microservices, financial transaction processing, event-driven architectures, and high-reliability backend platforms.
Languages & Frameworks
- Java • Spring Boot • Spring Security • JPA/Hibernate
- RESTful APIs • Microservices • CQRS (learning & applying)
Security & Identity
- OAuth2 / OpenID Connect
- Keycloak (SSO, Service-to-Service Auth, Custom SPI Development)
- API Keys, Role-Based Access Control (RBAC), JWT
Data & Messaging
- PostgreSQL • MySQL • Liquibase
- Redis
- AWS SQS / LocalStack
- Distributed Scheduling / Background Processing
Cloud & DevOps
- AWS
- Docker
- CI/CD
- Observability mindset (logging, resilience, monitoring)
- 🛡️ Centralized Authentication Platform using Keycloak with:
- SSO
- Secure service-to-service authentication
- Custom API Key Extensions
- Role-based access control
- 🔌 Enterprise Integration with Zoho Creator, building secure backend services around it
- 💳 Fintech Transaction Systems
- Settlement services
- Wallet & billing flows
- Secure financial APIs
- ⚙️ Distributed Background Job Processing
- SQS + ShedLock
- Retry & DLQ workflows
- 🧩 Microservices architecture
- Clean modular design
- Decoupled components
- Production-grade patterns
- Becoming a Subject Matter Expert in Keycloak & SSO
- Deepening expertise in secure service architectures
- Advancing knowledge in CQRS and scalable event-driven design
- Backend engineering roles
- Architecture-focused work
- Collaborations on enterprise / fintech / security systems
Email: toludavv@gmail.com
Phone: +2338036648861
GitHub: https://github.com/toludavid