Case studies
Scaling a production NestJS backend with PostgreSQL, Redis, RabbitMQ, Prisma, and disciplined team delivery.
Maintained 99.9% uptime, reduced API latency by 40%, and supported consistent delivery with a backend team of 8 engineers.
Role: Engineering Manager / backend architecture owner
Scope: NestJS modules, Prisma repositories, PostgreSQL, Redis, RabbitMQ, Nginx, delivery process
Tradeoff: Improved performance and maintainability without rewriting stable business behavior.
Risk managed: Production regressions on high-traffic workflows.
A consulting platform with chat, VoIP, video, learning modules, and backend microservices.
Supported 500+ concurrent users with real-time communication flows and faster SQL retrieval paths.
Role: Backend developer on communication-heavy platform
Scope: Chat, VoIP, video sessions, SQL optimization, RabbitMQ, Angular integration
Tradeoff: Separated communication orchestration from persistence while keeping latency-sensitive paths direct.
Risk managed: Call reliability, session state synchronization, and database bottlenecks.
Financial backend systems with KYC/AML, exchange integrations, blockchain nodes, and polyglot persistence.
Enabled compliant onboarding and scalable backend features for financial workflows.
Role: Backend developer for financial platform services
Scope: KYC/AML, document validation, Binance integration, PostgreSQL, MongoDB, Neo4j, Redis, Elasticsearch
Tradeoff: Used the right persistence model for each workflow instead of forcing one database pattern.
Risk managed: Sensitive document handling and correctness in financial/accounting flows.