Built and maintained production pipelines at scale.
Data Engineer | Systems Builder
Rajasekar C
Data Engineer with 5+ years of experience in SQL, Python, ETL, PostgreSQL, and Redis. Built and maintained high-volume pipelines, backend systems, and production tooling.
Proof / Impact
Key results
Built internal tooling that cut issue resolution time dramatically.
Resolved production issues and helped reduce backlog significantly.
Experience
Digit Insurance
Data Engineer
- Built a Flask + Pandas tool reducing Vahan issue resolution from ~30 minutes to under 1 minute; awarded "Tech Titan"
- Designed and maintained ETL pipelines processing ~50M records daily
- Developed real-time stored procedures for policy renewal detection and automated MoEngage notifications, eliminating redundant alerts
- Implemented PII classification and secure credential storage workflows for compliance
- Automated DB schema versioning by extracting Postgres DDL and syncing with Git, improving traceability and deployment reliability
- Developed ETL pipelines and schemas for Bima Satrak regulatory service
- Reduced production backlog from ~600 to under 70; resolved 4000+ issues
- Built Excel-to-database ingestion tools using Pandas for operational workflows
- Streamlined credit update processes using SQL automation and stored procedures
Appzwork
Software Engineer
- Delivered SQL-based data solutions for banking and insurance clients
- Built complex queries, stored procedures, and analytics workflows
- Handled production debugging, incident resolution, and deployments
- Supported database maintenance and recovery operations
Independent Systems & Application Development
Product, backend, and automation work
- Built end-to-end systems including backend services, frontend interfaces, and experimental applications across multiple domains
- Developed API-driven pipelines and automation workflows
- Designed Redis-based caching and indexing systems
- Rapidly prototyped and iterated products using AI-assisted development tools
Independent Projects
Valipokkann Platform
- Full-stack artist platform with dynamic content and media systems
- Built as an independent product and creative platform
Onchain Rugs
- Generative system driven by blockchain state and metadata architecture
- Built with indexing, caching, and scalable asset logic
Hard Copy
- iPad note-taking app with structured interaction and memory-assisted design
- Designed for fast capture and structured document workflows
Madraschecks
- Generative textile system with algorithmic pattern rendering and historical context
- Includes a live generator workflow and supporting application logic
Skills
Core Skills
Data & Backend
Tools & Workflow
Development Workflow
Education
B.E.
RMK Engineering College
HSC
Infant Jesus MHSS
SSLC
St. Mary's Matriculation