Bengaluru, Karnataka
Job Summary

Job Description – Senior .NET Developer (Cards / Payments)

Position: Senior .NET Developer – Cards & Payments

Experience : 8+ Years (hands on)

Role Summary

We are seeking an experienced .NET Developer with strong Cards and Payments domain expertise to design, develop, and support enterprise-grade payment applications. The ideal candidate should possess hands-on experience in payment processing platforms, card payment systems, transaction lifecycle management, and contemporary .NET technologies.

Key Responsibilities

Key Responsibilities

Design and develop scalable payment and card-processing applications.
Build and support high-volume transaction processing systems.
Develop APIs for payment gateways and third-party integrations.
Work on card transaction lifecycle—from authorization through settlement.
Ensure applications meet security and PCI-DSS compliance requirements.
Troubleshoot production issues and provide L3 support.
Participate in architecture reviews and technical design discussions.
Collaborate with business analysts, architects, QA teams, and payment SMEs.

Nice to Have

Exposure to Open Banking.
Experience with Payment Gateway integrations (Stripe, Adyen, Worldpay, Fiserv, etc.).
Azure Kubernetes Service (AKS).
Docker & Kubernetes.
Event-driven architectures.
Fraud Monitoring Systems.
Payment Modernization Programs.
Skill Requirements

Mandatory Technical Skills

.NET Technologies

8+ years of hands-on experience in:
C#




ASP.NET MVC / ASP.NET Core
.NET Framework / .NET Core
Web API / REST Services
Entity Framework
LINQ
Microservices Architecture

Database

SQL Server
Stored Procedures
Query Optimization
Database Design

Cloud & DevOps

Azure /AWS Cloud
DevOps
CI/CD Pipelines
Git / GitHub

Integration & Messaging

REST APIs
SOAP Services
JSON/XML
Kafka / MQ / RabbitMQ (preferred)

Cards & Payments Domain Expertise (Mandatory)

Strong working experience in one or more of the following areas:

Card Payments

Credit Card Processing
Debit Card Processing
Prepaid Cards
Virtual Cards
Card Issuing & Acquiring

Payment Processing

Authorization
Clearing & Settlement
Reconciliation
Chargebacks & Disputes
Transaction Monitoring

Card Networks

Visa
Mastercard
AMEX
Discover

Payment Standards

ISO 8583
ISO 20022
PCI-DSS Compliance

Payment Platforms

Merchant Payment Systems
Payment Gateway Integrations
Real-Time Payments
Digital Payments
Open Banking APIs

These domain areas align with internal Payments & Cards capability focus areas such as Cards, Merchant Solutions, Real-Time Payments, Payment Security, and Payment Processing.

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📌 Senior Technical Lead - .Net, Azure, C# (India)
🏢 HCLTech
📍 India