Payments & FinTech
Engineering Staffing

Retail Payment Solutions

Payments & FinTech Engineering Staffing

EverExpanse provides specialized Staff Augmentation and Staffing services in Payments and FinTech Engineering, supporting payment processors, financial institutions, POS manufacturers, payment gateway providers, and FinTech platforms in building secure, compliant, and scalable payment solutions.

With deep expertise across the complete payment ecosystem—from EMV kernel development and POS application engineering to payment gateway integration, transaction processing, and certification—EverExpanse enables organizations to accelerate payment product development and regulatory compliance through highly skilled engineering talent.

Our payment engineering professionals bring hands-on experience in EMV L1, L2, and L3 certification, contact and contactless payment technologies, payment device software, secure transaction processing, and gateway integrations aligned with PCI, EMVCo, and scheme certification requirements.

Our Payment Engineering Expertise Includes

Payment Equipment Manufacturer

Payment Device Software & EMV Kernel Development

EMV Kernel Development (Contact & Contactless)

EMV L1 / L2 / L3 Certification support

Payment terminal software development

SoftPOS development

Android POS and Linux POS development

Payment device firmware integration

Technologies:

Embedded C / C++

Java / Kotlin (Android POS)

Linux-based embedded systems

Payment Equipment Manufacturer

POS Application Development

Android POS application development

Payment terminal UI development

Transaction processing logic

Device integration (card reader, NFC, PIN pad, printer)

Platforms:

Verifone

Ingenico

PAX

Newland

Castles Technology

SoftPOS platforms

Payment Equipment Manufacturer

Payment Gateway Integration & Development

Payment gateway integration

Payment gateway backend development

Payment orchestration platforms

API-based payment integrations

Technologies:

Java

GoLang

.NET Core

Node.js

REST APIs

Microservices architecture

Protocols:

ISO 8583

ISO 20022

JSON / REST

SOAP

Payment Equipment Manufacturer

Payment Processing Systems

Payment switch development

Transaction routing systems

Authorization and settlement systems

Transaction lifecycle management

Technologies:

Java

GoLang

PostgreSQL

SQL Server

Redis

Kafka

Payment Equipment Manufacturer

Certification & Compliance Support

EMVCo certification support

Visa / Mastercard certification support

PCI DSS compliance engineering support

Scheme certification integration

Payment Equipment Manufacturer

Digital Payment Technologies

Contactless payments (NFC)

QR code payments

Mobile wallets integration

Tokenization

Secure Remote Commerce (SRC)

3D Secure (3DS)

Payment Technology Expertise

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Programming Languages

Embedded C , C++, Java, GoLang, .NET Core, Kotlin, Python

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Platforms

Android, Linux, Embedded systems

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Databases

PostgreSQL, SQL Server, MySQL, Oracle

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Messaging & Integration

Kafka, RabbitMQ, REST APIs, ISO 8583

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Cloud Platforms

Azure, AWS, Linux server environments

Retail Payment Solutions

Payment Industry Segments We Support

Payment Processors

Payment Gateway Providers

POS Terminal Manufacturers

FinTech Companies

Banks and Financial Institutions

Payment Aggregators

Payment Device Manufacturers

img Our Valuable Clients