Udhaya KumarStaff Backend Engineer
←Back to Home
CURRICULUM VITAE // 13+ YEARS

Resume & Track Record

Architect and operate high-scale data systems where every layer — ingestion, modeling, serving, operations — matters. Seeking Staff Engineer, Principal Engineer, or Founding Engineer roles in data infrastructure or platform systems. Open to Indian, international, remote, and hybrid opportunities.

MERCHANTS OWNED200+
FASTEST FRESHNESS<5min
TEAM GROWTH4 → 7
COST REDUCTION66%
✓PDF · CONSOLIDATED RESUME

Staff Backend Engineer | Debezium · ClickHouse · Pub/Sub · Real-time CDC

13+ years backend infrastructure, data platforms, and production systems. Links back to case studies and incident records for verification.

⬇Download Resume (PDF)

◷Engineering Track Record

2010 — 2026

Senior Software Developer - Team Lead

2020 — 2021
ConvertCart•Real-time data pipelines, production incidents, recommendation engine
MySQLDebeziumPub/SubWebhooksDatastreamGKE
  • •
    Diagnosed fragile cron-sync system (normalize-on-ingest locked all retroactive changes to full resyncs), redesigned to raw-source storage eliminating expensive resync friction.
  • •
    Replaced batch sync with real-time pipelines: native webhooks for Shopify and BigCommerce, custom implementations for WooCommerce and Magento 2 (no native webhook support).
  • •
    Stopped production crisis: 50M-row CDC snapshot consumed 60% CPU, blocked writes. Diagnosed root cause (table-level snapshots at scale), recovered safely via Datastream, fixed via incremental table-level migration with production-scale testing.
  • •
    Initiated recommendation engine (Manual → Automated → Smart trust ladder). Validated 80%+ adoption on Smart tier.

Senior Product Development Lead

2021 — 2026
ConvertCart•Data platform architecture, identity resolution, segmentation, recommendations
MySQLDebeziumPub/SubMongoDBBigQueryClickHouseRedisGKE
  • •
    Owned architecture, migration, monitoring, and production operation for customer and order data across 200+ merchants on five commerce platforms.
  • •
    Designed multi-source BigQuery customer schema consolidating Shopify, BigCommerce, WooCommerce, Magento plus click-tracking. Implemented deterministic identity resolution across anonymous sessions and known customers.
  • •
    Built SQL query builder and materialization pipeline enabling non-technical CSMs to create segments. Reached 1,000+ active segments in 6 months, eliminated 40-request engineering backlog.
  • •
    Scaled recommendation engine to 80% merchant adoption at 200ms p99 across five regions.
  • •
    Migrated segmentation compute from BigQuery to ClickHouse: $2,470 → $850/month (66% reduction) via cityHash64-based batched hashing and ClickHouse tuning.
  • •
    Architected 50+ microservices platform while growing team from 4 to 7 engineers.

Backend Consultant

2019 — 2020
Independent Consultant•Freelance backend development
  • •
    Freelance backend development and delivery work for clients during transition between full-time roles.

Software Development Lead

2018 — 2019
Friday Media Group•Marketplace APIs, content ingestion, team leadership
  • •
    Managed 3–6 engineers across marketplace API development, content ingestion, and data pipeline systems. Coached team on technical depth and ownership.

Senior Software Engineer

2014 — 2018
Scientific Games•Query optimization, reporting integrations, microservices
MySQLJasperReportsSQL optimization
  • •
    Diagnosed and fixed pagination + join cardinality inversion bug in recurring reporting query. Fixed by reordering operations (filter before join): 3+ min → <500ms (360x).
  • •
    Built reporting integrations and web services for high-volume gaming platforms.

Web Developer

2012 — 2014
Tenlegs•Email systems, web applications
PHPMySQLHTML/CSS
  • •
    Designed and built CSS-to-inline email template converter, parsing client website CSS and converting all styling to inline rules for cross-email-client consistency. Adopted internally and considered technically challenging at the time.
  • •
    Built web applications for an education-sector startup platform serving the artistic community.

Junior Software Engineer

2010 — 2012
ISPG Technologies•LAMP-stack web projects
PHPMySQLLAMP
  • •
    Delivered multiple web projects end-to-end using PHP, MySQL, HTML, and JavaScript — content management systems, social-networking platforms.
  • •
    Built strong foundation across the LAMP stack through varied small-to-medium projects.

Questions about the resume?

Email me with the system you need owned, and I can discuss specific details.

Read the ten incident records that shaped this resume →