Md. Mehadi Hasan

Senior Software Engineer (Data Engineering & AI)

Goava Sales Intelligence AB

2024-09 – Present

• Cut AWS costs by 43% by re-architecting the OpenSearch cluster ( 2 fewer data nodes) and tuning Elasticsearch queries, S3 access patterns, and retention; sync time down 200 ms . • Drove a 7% lift in customer retention via an LLM-based profile enrichment system adding 15+ dimensions of data per profile and a robust contacts pipeline raising coverage from 75% to 95% . • Built an MCP server for natural-language querying and actioning, cutting manual effort by 98% . • Shipped top-requested LLM agents for prospecting, signals, and research automation. • Co-led three zero-data-loss production MySQL RDS major-version migrations (5.6 through 8.4).

Software Engineer

Goava Sales Intelligence AB

2022-10 – 2024-09

• Architected the core indexing pipeline: 10M+ records/day (3B+/year) across 300M+ OpenSearch docs. • Designed a scalable Pub/Sub event bus streaming user pipeline events into the data lake for real-time analytics, powering a company-matching service with no file-size limit on imports and CRM sync.

Junior Software Engineer

Goava Sales Intelligence AB

2020-11 – 2022-10

• Built Scrapy spiders, 25k jobs/day from 12 sites and partner APIs, plus Indeed via residential proxies.

Shahjalal University of Science & Technology

BSc in Computer Science and Engineering

2015-03 – 2019-03