4532 •••• •••• 7891
Card Holder
ROHAN SAKHARE
ISO
8583
🏪
UPI · Google Pay
NPCI Switch · VPA: rohan@okaxis
+₹1,500
SUCCESS
💻
POS Terminal · HDFC Bank
MTI: 0100 · DE48 · RuPay Card
+299
APPROVED
🏧
ATM Withdrawal · SBI
MTI: 0200 · Cash Withdrawal · ISO8583
-₹5,000
DEBITED
// Welcome to Rohan's Portfolio
Rohan Sakhare
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Rohan Sakhare

C++ Developer · Payment Systems · Euronet

Building secure, high-performance payment infrastructure. Specializing in ISO 8583 transaction processing, card issuing systems, and backend banking architecture.

1+ Years Euronet
8.58 CGPA
4× Gold Medals
View Projects → GitHub ↗ LinkedIn ↗
Rohan Sakhare
Current Role
C++ Developer
Company
Euronet REN
Domain
Banking & Payments
Since
June 2025
C++ ISO 8583 MySQL STL MariaDB Git
8.58
CGPA
4×
Gold
3+
Projects
Card Tap / Insert · Customer initiates payment
POS Terminal · Captures card & transaction details
MTI 0200 · Financial Request message created
ISO 8583 · Standard message format used
Payment Switch (REN) · Routes transaction
Visa / Mastercard · Network processing
Issuing Bank · Balance & fraud checks
MTI 0210 · Response (Approved / Declined)
POS Terminal · Shows result to customer
Settlement · Funds transferred to merchant
Card Tap / Insert · Customer initiates payment
POS Terminal · Captures card & transaction details
MTI 0200 · Financial Request message created
ISO 8583 · Standard message format used
Payment Switch · Routes transaction
Visa / Mastercard · Network processing
Issuing Bank · Balance & fraud checks
MTI 0210 · Response (Approved / Declined)
POS Terminal · Shows result to customer
Settlement · Funds transferred to merchant
How Payments Flow

Transaction Architecture

💳
Card Holder
▶
TAP/SWIPE
🏪
ATM / POS
▶
TO ACQUIRER
🏦
Acquirer Bank
▶
ISO 8583
⚡
Acquirer Switch
▶
ROUTING
🌐
Visa / MC Network
▶
TO ISSUER
⚡
Issuer Switch
▶
AUTH REQ
🏦
Issuing Bank
▶
CBS CALL
💻
Core Banking (CBS)
About Me

Building the backbone
of modern payments.

I'm a passionate C++ Developer at Euronet, working on the REN Banking Switch platform. I specialize in building secure, efficient payment solutions that power real-world banking infrastructure.

With deep expertise in ISO 8583 message processing, OOP design patterns, STL, and DSA, I craft clean, optimized backend systems. My work touches card issuing and acquiring systems, Mastercard & Visa mandate compliance, and CMS integration.

I graduated with 8.58 CGPA from Dr. D.Y. Patil Institute of Technology, Pune — where I also won 4 gold medals in Kabaddi and served as Computer Department Head at Parakram 2025.

🏦
Current Company
Euronet Worldwide — REN Platform
📍
Location
Mumbai, Maharashtra, India
🎓
Education
B.E. Computer Engineering · DY Patil
⚡
Specialization
Payment Systems · ISO 8583 · C++
🐙
Technical Stack

Core competencies

💻
C++
85%
🗄️
MySQL / MariaDB
70%
🧩
DSA
60%
🔌
API (XML / JSON)
60%
📚
STL
70%
💳
ISO 8583
30%
🔀
Git / GitHub
70%
🧪
Postman / soapUI
65%
Career

Work Experience

JULY 2025 — PRESENT
C++ Software Engineer
Euronet Worldwide · REN Banking Switch Platform

Working as a C++ Software Engineer on the REN Switch, a mission-critical, high-availability payment switching platform processing millions of real-time banking and card transactions daily across global markets.

Designing, developing, and optimizing core transaction processing modules in C++, with deep involvement in ISO 8583 message parsing, validation, routing, and response handling to ensure low latency, high throughput, and fault tolerance.

Owning end-to-end transaction flows for ATM, POS, prepaid cards, and card management systems, including authorization, reversal, settlement, and reconciliation processes.

Supporting international banking clients such as Prezzy Card (NZ/AU), GXS Bank, Standard Chartered (Phoenix/Trust), and IDFC First Bank, ensuring compliance with network mandates, card schemes (Mastercard & Visa), and regulatory standards.

Troubleshooting production-critical issues, performing root cause analysis (RCA), and maintaining 99.99% system availability under strict banking SLAs.

Collaborating with QA, UAT, and implementation teams for feature validation, release readiness, and smooth production rollouts in high-risk financial environments.

Contributing to release build preparation, unit testing, debugging, and performance tuning to ensure stable deployments across multiple client environments.

C++ ISO 8583 MySQL MariaDB CMS Git API(JSON/XML) Bash
DEC 2023 — JUNE 2024
iOS Mobile App Developer
VBAI Solutions Private Limited

Developed iOS mobile applications during a 6-month internship. Gained hands-on experience in mobile development lifecycle and worked on real-world application projects.

iOS Swift Xcode Mobile Dev
Academic Background

Education Journey

2018 – 2019
Yashkirti Vidyalaya, Pandharpur
Class X · Maharashtra State Board
🏅 87%
2020 – 2021
Karmaveer Bhaurao Patil Mahavidyalaya, Pandharpur
Class XII · Maharashtra State Board
🏅 94.18%
2021 – 2025
Dr. D.Y. Patil Institute of Technology, Pimpri Pune
B.E. Computer Engineering
🎓 8.58 CGPA
Portfolio

Featured Projects

💳
Card Payment Simulator
Interactive Payment Flow · POS · Tap to Pay · Transaction Auth · Hosted on GitHub Pages

An interactive Card Payment Simulator built with HTML, CSS, and JavaScript — hosted live on GitHub Pages. Simulates real-world payment scenarios including tap-to-pay, card swipe, POS authentication, approval/decline flows, and receipt generation. A visual demo of how ISO 8583 transactions work end-to-end.

Tap-to-pay & swipe card simulation with animations
Real-time transaction approval/decline decision flow
POS terminal UI with PIN entry and card reader
Receipt generation after successful transactions
Multiple payment scenarios: POS, Online, ATM
Inspired by ISO 8583 payment messaging standards
HTML CSS JavaScript Payment UX ISO 8583 Concepts GitHub Pages Live Demo ↗
📊
roXSAKHARE ISO 8583 Reference
Interactive ISO 8583 Explorer · Transaction MTIs · Data Elements · Hosted UI Tool

A complete and interactive ISO 8583 reference tool designed to explore transaction flows, message types (MTIs), and data elements in a structured and visual way. This project helps developers, QA engineers, and payment domain learners understand how authorization, financial, reversal, and reconciliation messages work end-to-end.

Full ISO 8583 transaction categories (01xx, 02xx, 04xx, 05xx)
Detailed request & response field breakdown for each MTI
Authorization, Advice, Financial & Reversal flow coverage
Search and explore specific data elements (DE fields)
Clean UI for quick debugging & learning payment flows
Useful for QA testing, CBS integration & switch development
HTML CSS JavaScript ISO 8583 Payment Systems FinTech Explore Tool ↗
🏦
Banking Management System
POS · ATM · ECOM · Online Banking · UPI · Fund Transfer · Loans · Card Services

A C++ Console-Based Banking Management System integrated with MySQL and ISO 8583-based transaction simulation, designed to function like a mini real-world bank. Manages Customers, Administrators, and Tellers with secure authentication, real-time validation, and full audit logging.

Secure multi-role authentication (Customer / Admin / Teller)
ISO 8583 message format for POS/ATM transaction simulation
Role-based admin access (A1–A4) for loan & card approvals
Singleton & Factory design patterns for modular architecture
REST API testing via Postman and soapUI
JSON & XML data exchange via custom Mediator layer
DSA-driven transaction queueing for performance
Full audit trail for every event and transaction
C++ MySQL ISO 8583 REST API Postman JSON XML OOPs DSA Design Patterns View on GitHub ↗
💳
CardVerse
Payment Cards · Transaction Flow · FinTech Learning Platform

A web-based fintech knowledge platform designed to explain different types of payment cards, their real-world usage, and complete transaction flows across POS, ATM, and online systems. Built for learning ISO 8583 messaging, banking switches, and real-world payment processing.

Interactive visualization of card transaction flows (POS / ATM / ECOM)
Understanding Debit, Credit, Prepaid, and Gift card usage
ISO 8583 message structure explained with real examples
End-to-end flow: Terminal → Switch → Network → Issuer Bank
Real-world inspired UI with transaction stream simulation
Educational platform focused on fintech awareness
Responsive frontend deployed on cloud
Clean and modular UI for easy understanding
Node.js HTML CSS JavaScript C++ ISO 8583 FinTech Vercel Live Demo ↗
🎯
Interview Experience Hub
Student Platform · Interview Prep · Real Experiences

A web platform built for engineering students to explore real interview experiences, prepare for placements, and learn from peers. It provides structured insights into company-wise interview processes, commonly asked questions, and preparation strategies.

Real interview experiences from multiple companies
Company-wise categorized preparation content
DSA, OOP, DBMS, and core subject topics included
Peer-shared insights and practical interview tips
Interactive UI with smooth navigation and animations
Helpful for college students preparing for placements
Responsive design with modern UI/UX
Deployed using GitHub Pages
HTML CSS JavaScript UI/UX GitHub Pages Frontend Live Demo ↗
⚡
Banking Switch — Euronet REN Platform
Payment Processing · Mastercard & Visa · CMS · Backend Development

Working as a C++ Developer on the Banking Switch (REN) platform at Euronet. Contributing to the NZ/AU Bank "Prezzy" project — handling end-to-end transaction flows, mandate compliance, and core banking modules in a production payment environment.

Mastercard & Visa mandate updates and implementations
Backend development using C++, CMS, and core modules
Unit testing for system stability and banking compliance
End-to-end payment transaction flow hands-on experience
C++ ISO 8583 MySQL MariaDB CMS XML JSON Postman soapUI Git Bash STL
Beyond Code

College Life

Kabaddi Champion
🏆 Champion
Parakram 2025 — 4× Kabaddi Gold Medalist
4 years, 4 gold medals in Kabaddi. An unforgettable journey of battles, teamwork, and victories.
Department Head
🎖 Leadership
Head of Computer Department — Parakram 2025
Led all departmental teams across multiple sports events as Student Head Coordinator.
Mr BE Award
👑 Award
Mr. B.E. — Department of Computer Engineering
Honored for excellence in academics, leadership, and overall contribution.
BE Graduation
🎓 Milestone
B.E. Computer Engineering — Class of 2025
Successfully completed B.E. in Computer Engineering in June 2025.
Dept of Year
🏆 Dept of the Year
Computer Engineering — Parakram 2023 & 2024
Part of the team that claimed "Department of the Year" for two consecutive years.
First Day Euronet
💼 New Chapter
First Day in IT — Euronet Journey Begins
Stepping into the corporate world at Euronet — hard work truly pays off.
Community

Interview Experience Hub

🎯
Interview Experience Hub

Real, honest interview experiences — my own selection story at Euronet, rejections that taught me lessons, and experiences shared by friends placed at top companies.

Goldman Sachs JUSPAY NiCE Pegasystems UKG Synechron HSBC mthree Cognizant IBM LTIMindtree Tech Mahindra Capgemini HCLTech EdgeVerve Emerson & more...
Visit the Hub 🚀