About
Sachin Gupta
Member of Technical Staff 2 · eBay · San Jose, CA
Backend engineer with 15+ years building large-scale billing and financial systems. My work centers on financial correctness, reliability, and the unglamorous engineering that keeps high-traffic, money-moving platforms honest.
At eBay I build and run key parts of the next-generation billing platform, from microservices and public APIs to reconciliation pipelines. I led the seller-and-balance migration and the public-API rebuild, and I now lead AI-enablement: the data contracts, observability, and governance a team needs before AI-assisted workflows can ship safely.
Outside the day job I judge at AI hackathons, speak at engineering conferences, mentor at universities, and peer-review for ACL and ICML. Building things in public (open-source projects, technical writing, community work) is how I keep current and how I give back.
What I focus on
- Billing Architecture
- Financial correctness, resilience, and operability across microservices and reconciliation pipelines.
- API Rearchitecture
- High-traffic reliability, performance tuning, and rollout governance on the public API layer.
- AI Enablement
- Data contracts, observability, and governance so AI-assisted workflows can ship safely and measurably.
- Reconciliation Pipelines
- Deterministic validations, idempotent processing, and audit-grade financial workflows.
Selected work
View all →eBay Next-Gen Billing Platform
Zero-disruption migration across the entire seller ecosystem
eBay · 2021-present
NSDL e-Voting Platform
STQC-certified e-voting for India's listed companies
Tata Consultancy · Government authorized
Walgreens Specialty Pharmacy Platform
LDD referral reporting and compliance for Walgreens specialty pharmacy
Tata Consultancy · Walgreens
HeapLens
Java & Android heap-dump analysis in VS Code
Open source · VS Code extension
SlideSherlock
Hallucination-free PPT to narrated video
Open source · Pipeline
Journey
2021 – Present
Member of Technical Staff 2 · eBay
San Jose, CA
Architecture and delivery on eBay's next-generation billing platform. Led the seller-and-balance migration cutover, rearchitected the public API layer for high-traffic reliability, and drive AI-enablement across data contracts, observability, and reconciliation pipelines.
2015 – 2021
Senior Java Developer · Tata Consultancy Services
Built and owned a specialty-pharmacy platform for Walgreens for reporting on Limited Distribution Drug referrals: near real-time integration with the core dispensing system, prescription tracking and auditing, and manufacturer-contract compliance. Served as technical SME for the domain and led releases end to end.
2012 – 2015
Java Developer · Tata Consultancy Services
Built merchandising applications for Walgreens covering basic department management, including store and planogram setup, and competitor pricing.
2011 – 2012
Java Developer · Tata Consultancy Services
Built the STQC-certified NSDL e-Voting web application: government-authorized electronic shareholder voting, aligned with W3C standards, with secure input handling, validation, and functional/database testing.
In the community
View all →- 4
- Talks
- 12
- Events judged
- 24
- Papers reviewed
- 20+
- Builders mentored
- 3
- Awards
Get in touch
Best reached on LinkedIn. You can also find me on GitHub, or Medium.