Rounak Longani/Software Engineer

I build software that makes it past the demo.

Building LLM agent systems — LangGraph and LangChain for orchestration, on top of the Python and Databricks data stack.

• LangGraph
• LangChain
• Python
• SQL
• Databricks
• AWS

Three months on the data engineering side, going from fundamentals to building pipelines.

• Worked across Python, SQL, AWS, MongoDB, Databricks, PySpark and Azure Data Factory on Linux.
• Built up the data warehousing and ETL fundamentals — preprocessing, modelling and pipeline development — that the current role runs on.

• Python
• SQL
• PySpark
• Databricks
• Azure Data Factory

Architected and delivered a multi-tenant SaaS from the ground up, and led the engineering team that shipped it.

• Designed and built the full stack from an empty repo — schema, services and interface — for a product that launched with paying customers.
• Owned the WhatsApp and Instagram API integrations, the subscription payment infrastructure, and tenant isolation across the platform.
• Led a cross-functional engineering team through the whole product lifecycle, from first prototype to launch.

• Next.js
• Python
• FastAPI
• LangChain
• Pinecone
• AWS

Started a small clothing label and learned what running a business actually costs.

• Took a t-shirt collection from idea to a selling product, handling the graphic design and the marketing alongside the operations.

• B2B
• Product marketing
• Graphic design

Two weeks on an events team, working to a fixed date that could not move.

• Helped run an Education Fair at JW Marriott that drew over 300 attendees.

• Events
• Teamwork

First stint in IT services, remote.