The Through-Line
I start every problem by making it visible. A diagram, a mind map, a system sketch. Clarity precedes good architecture.
For nineteen years I've done the same thing across payments infrastructure, search systems, and commerce platforms: stand outside a complex system, feel where the pressure is accumulating, and make one move that reorganizes everything.
I think in layers: what does the customer need today, what does the system need to become, and what's the smallest step that moves toward both.
I don't chase trends. I build foundations.
Signature Work
OMS Workflow Orchestration Engine
Meta · 2020–2024
Multiple product teams couldn't onboard. One major product line couldn't integrate at all. Diagnosed the root cause as a structural impossibility in the platform's type system. Not a bug — a category-level design error. Spent two years making the case. Executed a 1,000-file migration with zero incidents. Built the replacement: a DAG-based workflow orchestration engine with a novel type system, version control, and visualization tooling. Five verticals, fifteen-plus products, billions of requests per year, multi-billion dollar payment volume. Grew to a team of six. Platform became so critical a dedicated team was created to assume ownership.
Zero-incident migration · Billions of requests/year · Platform outlived the team · 5 verticals · 15+ products
AWS Data Exchange — Search Vision & Launch
AWS · 2017–2020
Designed and launched the Marketplace feature of AWS Data Exchange, contributing to the service's path to GA. Built the search ingestion pipeline that decoupled publishing from indexing. Created the search vision mind map that aligned all ADX leadership on product direction — became the team's architectural reference document. Go-to architect; could diagram the entire ADX architecture on demand.
Aligned leadership · Enabled GA · Became the team's architectural reference
EFD Project Rescue — CashPro Global Payments
Bank of America · 2007–2017
Took ownership of a payments delivery struggling for two months. Diagnosed root problems, realigned the team, delivered with zero defects. Enabled major client migrations off legacy systems. Built automation reducing two-week processes to two to three days. Led four agile teams building payment processing for enterprise banking clients.
Zero-defect delivery · Unblocked strategic client migrations · Built lasting trust
What People Say
"His superpower is his ability to distill big product ideas into documents and artifacts that others can understand."
Peer, AWS Data Exchange
"Getting lighting in meeting rooms just right. Rajan has quietly delivered a number of components that were stretch goals in our launch, and he did it with very little overhead."
Peer, AWS Data Exchange
"He is not just a cornerstone but a foundation on which the entire team can rely upon."
SVP, Senior Technology Manager, Bank of America
"You have consistently shown an ability to solve difficult technical problems with clean and well-articulated solutions which are above the standard at your level."
Engineering Manager, Meta