Built and maintained production pipelines at scale.
Data Engineer | Product Engineer
Rajasekar C
Data Engineer with 5+ years building high-volume production systems, backend services, and data platforms. Experienced in SQL, Python, PostgreSQL, ETL, and production automation, supporting systems that process approximately 50 million records daily. Currently building independent software products from architecture through deployment.
Proof / Impact
Key results
Built internal tooling that cut issue resolution time dramatically.
Resolved production issues and helped reduce backlog significantly.
Experience
Independent Product Engineer & Founder
Independent Product Engineer
- Designed and built software products end to end, owning system architecture, backend, and deployment
- Built backend services and REST APIs on PostgreSQL and Redis, adding caching and automated background jobs for reliability
- Containerized and shipped services with Docker, managing source, releases, and CI-style workflows through Git and GitHub
- Automated data indexing, metadata handling, and operational tasks to reduce manual effort and keep systems consistent
- Leveraged AI-assisted development tools, including Cursor, Claude, and Codex, to accelerate prototyping, testing, and feature delivery
Digit Insurance
Data Engineer
- Built a Flask and Pandas automation tool that cut Vahan issue resolution from ~30 minutes to under 1 minute, earning the company "Tech Titan" award
- Designed and ran ETL pipelines processing ~50M records/day, keeping downstream reporting accurate and timely
- Automated MoEngage customer notifications through real-time stored procedures for policy-renewal detection, eliminating redundant alerts
- Versioned PostgreSQL schemas by extracting DDL into Git, making deployments traceable, reviewable, and reproducible
- Implemented PII classification and secure credential storage to keep data handling compliant
- Delivered ETL pipelines and schemas for the Bima Satrak regulatory reporting service
- Resolved 4000+ production issues, cutting the open backlog from ~600 to under 70
- Automated recurring credit-update and Excel-to-database ingestion with SQL and Pandas, replacing manual runs
Appzwork
Software Engineer
- Built and maintained Oracle SQL and PL/SQL solutions, including stored procedures and reports, for banking and insurance production systems
- Owned incident response for live banking and insurance systems, diagnosing root causes and deploying fixes to production
- Tuned slow queries and stored procedures to improve database performance under high-usage production workloads
- Managed deployments and database maintenance and recovery across client production environments
Construction Business
Founder / Civil Engineer
- Founded and ran a construction business delivering residential and commercial projects end to end
- Managed vendors, clients, budgets, and schedules across concurrent projects
- Led site teams and daily operations, owning quality and on-time delivery
Independent Projects
Valipokkann
- A full-stack publishing platform built on a custom CMS, with dynamic content management, media handling, and page rendering across a self-designed architecture.
Hard Copy
- A native iPad note-taking app built for fast, structured capture and document organization, with a data model designed for quick entry and retrieval.
Onchain Rugs
- An on-chain generative art system that solves deterministic asset generation, on-chain metadata, and event indexing so every minted asset stays verifiable and reproducible.
Madraschecks
- A browser-based procedural generator that recreates Madras check textiles from seeded algorithms, so each pattern is unique yet historically accurate, paired with a research site on the textile's history.
Awards
Tech Titan Award
Digit Insurance
- Recognized for building a Flask + Pandas automation tool that reduced Vahan issue resolution from approximately 30 minutes to under one minute.
Skills
Languages
Databases
Backend
Data Engineering
DevOps
Cloud & Big Data
Developer Tools
AI Development
Education
B.E.
RMK Engineering College
HSC
Infant Jesus MHSS
SSLC
St. Mary's Matriculation