Lead Backend & Infrastructure Engineer specializing in scaling high-performance search systems, structuring clean decoupled APIs, and automating AI-native developer workflows.
- Massive Scale Optimization: Migrated 60M+ unstructured records from compressed flat files into a self-hosted Elasticsearch cluster, cutting query latencies from 105 seconds to sub-2 seconds (98% drop).
- Decoupled Architecture: Proven production delivery using the 5-Layer Pattern (Controller → Service → Repository → Cache → Queue) with BullMQ, Express, and FastAPI.
- Infrastructure Engineering: Complete ownership of production environments on self-hosted Ubuntu Linux VPS nodes utilizing Nginx proxies, Docker setups, and systemd process tracking.
- DevEx Automation: Customizing terminal-native coding pipelines using Aider and Claude Code platforms to condense 3-day module creation targets into 4 hours.
- Search Optimization: Implementing high-performance search configurations using Elasticsearch, Redis, and customized database caching strategies.
- Infrastructure & Observability: Managing self-hosted production nodes via Linux VPS, Nginx reverse proxies, and centralized systemd logging tools.
- Advanced Backend: Scalable 5-layer API design, asynchronous task workers (BullMQ), and large-scale data migrations.
- AI Infrastructure: Local developer environment pipelines, code scaffolding workflows, and terminal engineering automation.
- DevOps: VPS deployment, Linux service hardening, Docker containers, and live log routing.
- LinkedIn: Rafshan Jani
- Email: rafshan.dev@gmail.com