Open to backend, platform, and payments roles

Yogesh Sai Dondapati

Software Engineer @ Juspay

Backend and platform engineer carrying complex payment systems from architecture and merchant requirements through production delivery.

Led Air India Express from API alignment to production go-live

View Engineering Work

Download Resume

production-shell

$ whoami

backend/platform engineer @ Juspay

$ focus

payment architecture, merchant integrations, risk, refunds, reliability

$ operating-mode

architecture → implementation → production ownership

$ status

Open to backend, platform, and payments roles

Live system topology

Scroll through transaction lanes, architecture boundaries, production impact, and engineering judgment.

Scroll controls camera depthPointer controls perspective

250K+

monthly card transactions on the authentication flow

20M/day

transaction footprint behind analytics design

Live

Air India Express merchant integration delivered

End-to-end

DCC + multi-currency lifecycle architecture

TestFlight

native CernoviX macOS external beta

179

native XCTest cases built for CernoviX

JuspayNIT DurgapurPayment ArchitectureMerchant Integrations3DS AuthenticationRefunds & ReconciliationFraud-Risk SystemsMulti-Currency PaymentsNative macOS

Engineering Impact

Ownership across the payment lifecycle

Selected systems where the responsibility extended beyond implementation into architecture, merchant alignment, cross-team decisions, rollout readiness, and production behavior.

Architecture Lead & Developer

DCC + Multi-Currency Platform

A basic currency-conversion path had to evolve into a network-compliant platform supporting cardholder currency choice and merchant-selected transaction currencies across heterogeneous gateways.

Designed the FX-provider configuration dashboard and the extension to the existing payment page that selects and presents DCC, MCP, or both without conflicting customer choices; also defined the frontend-backend currency contracts, gateway payloads, audit-safe analytics, and lifecycle behavior across authorization, capture, void, refund, and chargeback flows.

DCCMCPPayment ArchitectureFX Providers

Produced the reviewed end-to-end design and common gateway contract for DCC and multi-currency processing across the payment lifecycle.

Tech Lead & Backend Developer

Air India Express Integration

The merchant needed production-ready payment behavior plus refund and reconciliation capabilities that the existing platform did not support for linked parent and child orders.

Led API alignment and rollout while implementing linked-order refunds with newest-child-first allocation and designing reconciliation across gateway files, ticket identifiers, and order relationships.

Technical LeadershipMerchant IntegrationRefundsReconciliation

Took a major merchant integration from API alignment to production go-live, including new refund and reconciliation behavior.

Lead Developer

Shared 3DS Authentication Platform

A merchant-scale 3DS flow needed to preserve payment correctness and operational visibility without becoming a one-off integration that future authentication products could not reuse.

Designed API contracts, authentication orchestration, reusable data-pipeline boundaries, observability, and load-test coverage for a shared integration model.

3DSAuthenticationAPI ContractsData Pipelines

Supports 250K+ monthly Air India card transactions and a reusable path for additional authentication flows.

Primary Engineering POC & Backend Engineer

HSBC Technical Ownership

I was handed primary technical ownership for requirements, decisions, delivery follow-through, and integration communication. One major delivery stream was extending Feedzai risk evaluation into refunds while making provider notifications merchant-configurable.

Provided end-to-end technical ownership for the HSBC integration and implemented pre- and post-refund risk flows plus a backward-compatible notification-policy layer driven by dashboard configuration, runtime rules evaluation, and auditable decisions.

FeedzaiRisk ScoringRefund RiskPolicy Engine

Served as HSBC's primary engineering point of contact while delivering a configurable Feedzai risk extension across transaction and refund lifecycles.

Explore all engineering case studies

Architecture Thinking

Designing the boundaries before scaling the implementation

The diagrams omit proprietary internals, but preserve the engineering questions that matter: contracts, state, failure semantics, data exposure, observability, and lifecycle consistency.

Authentication Platform

A shared contract carries authentication state from merchant checkout through provider interaction, gateway handoff, and an explainable result.

1Checkout

2Core Transaction

3Auth Service

43DS

5Gateway

6Issuer

Configurable Risk Lifecycle

Merchant policy and provider scoring operate across transaction and refund stages, with explicit notification eligibility and auditing.

1Intent

2Policy

3Provider

4Decision

5Notification

6Audit

Multi-Currency Payment Flow

Merchant FX configuration and customer currency choice remain consistent through payment, gateway processing, refunds, and chargebacks.

1Config

2Eligibility

3FX Quote

4Payment

5Gateway

6Refund

Independent Engineering

Product ownership beyond assigned work

Independent products reveal a different signal: the ability to choose the problem, set the architecture and quality bar, and carry the result toward real distribution.

Native macOS app in external TestFlight

Independent Product

CernoviX

A privacy-first financial email workspace that turns inbox data into searchable mail, transactions, accounts, balances, offers, and reconciled financial activity—all processed on-device.

Built two product implementations: a universal Electron desktop application and a native SwiftUI macOS application.
Engineered secure Gmail sync, OAuth PKCE, App Sandbox isolation, encrypted credential storage, exact-value SQLite persistence, full-text search, and checkpointed deduplication.
Automated signed distribution through CI and built 179 native XCTest cases across financial parsing, persistence, synchronization, and account behavior.

SwiftUIElectronSQLiteOAuthOn-Device PrivacyXCTest

Cross-team information workflow

Internal Hackathon · Runner-up

NewsPulse

An AI-assisted news intelligence service built to reduce the time teams spend finding, classifying, and acting on product, engineering, and business updates.

Built periodic ingestion and AI classification across product, engineering, and business relevance.
Delivered concise summaries and recommended actions to Slack, backed by a searchable dashboard for cross-team discovery.
Placed runner-up by turning a broad information problem into a focused, usable workflow within a hackathon timeline.

AI ClassificationSlackSearchDashboardRapid Delivery

View project details

Engineering Judgment

The standard behind the systems

The projects vary; the operating principles stay consistent across architecture, implementation, and production support.

Reliability before cleverness

Production systems reward clear recovery paths, bounded complexity, and predictable behavior under pressure.

Observability is part of the feature

A payment flow is not complete until operators can explain what happened, where it failed, and what to do next.

APIs are contracts, not just endpoints

Strong contracts reduce ambiguity between merchants, providers, gateways, and internal services.

Payment systems require defensive design

Retries, idempotency, validation, secure forwarding, and fallback paths are core design material.

Ownership means staying close to production

The work includes rollout readiness, monitoring, incident feedback, and keeping the system understandable.

Scale starts with data and failure modes

Before code gets complicated, the hard questions are usually correctness, shape of data, and behavior during partial failure.

Progression

From production support to technical ownership

The scope expanded from monitoring and gateway implementation into merchant-facing leadership, platform architecture, cross-team delivery, and mentoring.

Juspay

Associate Software Development Engineer

July 2025 – Present

Led Air India Express's integration from API walkthroughs and merchant issue resolution through production go-live; implemented linked-order refunds with LIFO child-order allocation and designed reconciliation across gateway files, ticket IDs, and order relationships.
Owned the reviewed architecture for Dynamic Currency Conversion and Multi-Currency Processing, including the FX-provider dashboard and an extension to the existing payment page that resolves and presents DCC, MCP, or both through explicit frontend-backend contracts; covered authorization variants, refunds, chargebacks, gateway contracts, auditing, and analytics.
Served as HSBC's primary engineering point of contact for requirements, technical decisions, Jira follow-through, and delivery communication; extended Feedzai risk coverage across transaction and refund lifecycles and built a backward-compatible notification-policy layer with dashboard configuration and audit logs.

Juspay

Software Development Engineer Intern

Jan 2025 – Jun 2025

Owned production monitoring as primary point of contact for IndiGo and contributed fraud-risk and UPI improvements across live payment flows.
Implemented Apple Pay gateway routing, token mapping, API extensions, and secure support for encrypted and decrypted transaction paths.
Selected through the Juspay Hiring Challenge 2024.

Review the complete experience timeline

Build with me

Need an engineer who can carry complex systems from design to production?

I combine hands-on backend delivery with architecture, merchant-facing technical decisions, cross-team execution, and the production discipline required for high-stakes payment systems.

Contact Yogesh Download Resume View LinkedIn