DHEERAJ YADAV

Senior Software Engineer (Backend / Full Stack) at Optimiser CRM

Owned and scaled backend services powering user-facing features involving financial data, transactional work-flows, and real-time user activity. Designed and maintained production-grade APIs using TypeScript, Node.js, and NestJS with strong validation, authentication, and authorization guarantees. Modeled and optimized PostgreSQL and Redis data stores to maintain consistency across user profiles, transactional records, and derived metrics. Implemented WebSocket-based real-time services for live updates, notifications, and activity tracking at scale. Integrated third-party APIs and asynchronous pipelines with robust retry logic, idempotency, and failure handling. Collaborated closely with frontend and product teams to deliver end-to-end features, translating business requirements into scalable technical solutions. Improved system reliability and performance through structured logging, monitoring, alerting, and hands-on production incident response. Led end-to-end feature ownership acros

Backend Developer Intern at Sowe Apps (MoneyNotSleep)

Developed backend APIs using Express.js to support authentication, data ingestion, and workflow orchestration. Designed MongoDB schemas and aggregation pipelines for analytics and reporting use cases. Implemented middleware for input validation, request sanitization, and centralized error handling.

Senior Software Engineer (Rust Backend) at Optimiser

Designed and built high-performance REST APIs in Rust (Tokio) with validation, structured error handling, and API security. Implemented authentication and authorization (JWT-based flows) with rate limiting and input sanitization. Rewrote latency-critical services from Node.js to Rust, improving p95 latency by 60% and reducing infra cost by 45%. Architected event-driven systems using Kafka with retries, DLQ, and fault-tolerant consumers. Designed and optimized database schemas, migrations, and queries for PostgreSQL and Redis. Built a distributed task scheduler with retry logic, exponential backoff, and idempotent execution guarantees. Leveraged AI coding tools (Cursor, Copilot) to speed up development, debugging, and incident resolution. Led production debugging and incident reporting, improving observability with metrics, tracing, and logs.