I'm Siddharth Pachori-image

I'm Siddharth Pachori

Engineering leader with 11+ years building large-scale e-commerce checkout, payments, and regulated financial infrastructure across 26 countries, from system design through production ownership. I enjoy architecting distributed systems, leading cross-functional teams, and mentoring engineers toward senior-level ownership.

Current Work / Resume

Selected projects & impact

Unified Checkout Platform

Contribution

Architected a unified, event-driven checkout platform supporting any reference (cart, order, or point node). Built plug-and-play components packaging payment methods, billing & shipping. Included authorization and split & on-demand capture, plugging directly into post-order fulfillment workflows.

Technologies

  • Event-Driven Architecture
  • Payment Methods
  • Billing & Shipping
  • Post-Order Fulfillment

PCI-DSS Compliance & Expansion

Contribution

Led a global PCI-DSS transformation across checkout and payment systems, strengthening controls, reducing card-data exposure, and enabling secure expansion across multiple markets.

Technologies

  • PCI-DSS
  • Checkout
  • Payments
  • Security

Credit Risk, Fraud Prevention & Settlement

Contribution

Built pre- and post-order controls using AVS checks, velocity rules, risk scoring, capture/hold logic, payment validation and settlement workflows. Added self-service invoice workflows and enhanced detection using device intelligence and behavioral signals.

Impact

~40% less review time, ~15% lower loss exposure, ~45% less reconciliation time

Technologies

  • AVS
  • Risk Scoring
  • Device Intelligence
  • Settlement

Payment Gateways & Methods

Contribution

Integrated Adyen, Braintree, PayPal, credit & debit cards (Visa, Mastercard), Google Pay, Apple Pay, Klarna, direct debit, bank transfers, and Pay by Invoice across regional journeys.

Impact

Expanded payment capabilities across 8-10 markets

Technologies

  • Adyen
  • Braintree
  • PayPal
  • Digital Wallets
  • Bank Transfers

Micro-Frontend Platform Migration

Contribution

Modernized legacy checkout and payment applications into Node.js microservices on AWS using event-driven processing. Transformed UI into a micro-frontend platform with shared content delivery and independently owned frontend domains.

Impact

32% scalability gain, 30% lower latency

Technologies

  • Node.js
  • AWS
  • Event-Driven Processing
  • Micro-Frontends

GraphQL / Apollo API Modernization

Contribution

Owned UI and built reusable components for Fictiv's vendor/quote platforms. Upgraded REST API to Apollo framework.

Impact

30% faster on-demand response, 15% better on-time delivery

Technologies

  • GraphQL
  • Apollo
  • REST APIs

AI & Context Engineering

Contribution

Driving dev using coding agents, LLMs, prompt engineering, and agentic workflows, while structuring product, domain, architecture, codebase, and production context to improve generation, review, testing & troubleshooting.

Technologies

  • Coding Agents
  • LLMs
  • Prompt Engineering
  • Agentic Workflows