Calmus Dennis
Backend Engineer & Systems Architect
I design and implement backend systems with explicit trade-offs. Focus on data integrity, fault tolerance, and maintainable architectures. Documentation includes not just what was built, but why specific technical decisions were made.
Database Design
Schema optimization, indexing, transactions
API Architecture
REST, GraphQL, event-driven patterns
System Reliability
Monitoring, error handling, recovery
Systems & Implementations
OpenRents
ProductionAggregates noisy rental data into confidence-aware insights using consensus-based trust scoring.
PostgreSQLRedisRubySMS Integration
ContraScan
ProductionAI contract analysis system. Private beta scanning for 200+ risk patterns across document types.
Document ProcessingRisk ModelsSecure Storage