Payment Gateway SDK Integration Services | Secure & Scalable

Adequate Infosoft specializes in payment gateway integration. So far, our developers have integrated 20+ payment gateways for different countries, gaining hands-on experience with almost all popular payment gateways.

If you are looking for payment integration services or want to hire a developer to integrate a payment gateway into your application, you’ve come to the right place.

Payment gateway SDK integration allows businesses to easily accept payments on their mobile apps, websites, and POS systems. Through our payment SDK integration services, we help businesses support card, wallet, UPI, and subscription models, seamlessly integrating payments into their systems while ensuring security and compliance.

We deliver end-to-end payment gateway integration services using SDKs like Stripe, PayPal, QuickPay, Paystack, Reepay, Razorpay, Paytm, Apple Pay, and more. Our payment solutions ensure:

Smooth checkout experience for customers.
Secure and compliant payment transactions.
Scalable systems that support growth.
Faster go-to-market with SDK-driven solutions.

Connect Your Gateway

How payments work

A payment gateway is a digital manager that ensures that the money transaction between a customer and a shopkeeper (or merchant) is completed securely and quickly.

Payment gateways securely transfer money between customers and merchants. They take care of authorization, capture, and settlement, enabling instant payments across countries and currencies.

Fraud protection

Payment gateways have smart technology that keeps your money and data safe. Gateways use tokenization, encryption, and AI to prevent fraud, reduce chargebacks, data breaches, and other risks, and comply with PCI DSS regulations.

Multiple payment options

Support cards, digital wallets, UPI, subscriptions, and other payment methods, leading to happier customers and more successful transactions.

Easy international transactions

With tools like Adyen and PayPal, businesses can accept payments worldwide, convert currencies, and reach international customers easily while complying with local regulations.

What Different Payment Gateway SDKs We Integrate

Stripe SDK

Stripe enables payments, subscriptions, and wallets. It supports recurring billing, tokenization, multi-currency, and PCI DSS compliance, making it ideal for SaaS, e-commerce, and marketplaces.

PayPal SDK

PayPal allows checkout, invoicing, and global payments. With buyer protection, instant payments, and subscription APIs, it remains one of the most trusted payment solutions worldwide.

Braintree SDK

A PayPal-owned SDK that supports cards, wallets, and subscriptions. It offers advanced fraud detection, recurring billing, and smooth mobile SDKs for global payments.

Square SDK

Square supports POS + online payments. It enables inventory syncing, card-on-file payments, invoicing, and omnichannel solutions for retailers and service providers.

Adyen SDK

Adyen enables global payments, checkout, and risk management. It offers multi-currency, local payment methods, fraud prevention, and advanced compliance features for enterprises.

Razorpay SDK

Razorpay supports UPI, subscriptions, cards, and wallets for India. It is widely used for startups and enterprises offering fast settlement and easy integration.

Paytm SDK

Paytm SDK allows wallet, UPI, and card payments in India. It supports QR code-based transactions and loyalty rewards for e-commerce and on-demand apps.

Google Pay SDK

Google Pay SDK enables in-app UPI and card payments with tokenization. It supports India-first UPI solutions and global card transactions across Android apps.

Apple Pay SDK

Apple Pay SDK provides NFC/contactless payments. It enables Face ID/Touch ID authentication, tokenization, and integration with POS terminals and iOS apps.

Our Payment Gateway Integration Services

Payment Gateway API
Integration

We integrate payment gateway APIs across web and mobile platforms to make transactions incredibly easy and seamless.
Our solutions handle authorization (approval of payments), capture (securing funds), settlement (depositing funds into the merchant's account), and refunds with complete security.

Integration with Multiple Payment Methods

Our team supports a variety of payment methods, including credit/debit cards, mobile wallets, UPI, and subscription billing.

Our system securely manages authorization (approving payments), capture (holding funds), settlement (crediting funds to the merchant's account), and refunds.

It complies with PCI DSS regulations and increases transaction success rates across multiple locations. This means payments are completed smoothly and without interruption, no matter where the customer is.

Payment Gateway UI Optimization

We design customized checkout UIs optimized for speed and user experience. From one-tap payments to branded hosted pages, our integration reduces cart abandonment, builds customer trust, and drives higher transaction success on all platforms.

Whether it's a one-click payment or a branded hosted page, our goal is to keep customers engaged and reduce cart abandonment. This not only builds trust but also increases payment success across all platforms.

Security Features Implementation

We fully comply with PCI DSS regulations and protect sensitive customer information, such as card details, using technologies like tokenization and TLS encryption.

Our fraud prevention features include AI-powered risk analysis, velocity checks, and real-time monitoring, providing a strong security shield to protect businesses and customers from financial threats.

Multi-Currency & Global Payment Support

If your business accepts payments internationally, we can build a robust platform to handle transactions from customers around the world. We integrate popular SDKs like Stripe, Adyen, and PayPal directly into your system.

Recurring Billing & Subscription Management

If your project is based on a subscription model, don't worry, we also make recurring payments easy for you. We use Stripe, Paystack, Quickpay, Braintree, and Razorpay APIs to build subscription management systems that seamlessly scale your business.

Our features include automated invoicing, regular billing, dunning management, and a self-service portal for customers. All of these features help SaaS and membership platforms manage recurring payments easily and efficiently, so you can build strong and trustworthy relationships with your customers.

Technical Overview: Payment Gateway SDK Integration

Our integration process includes both frontend and backend development. We configure tokenization, webhooks, transaction settlement, and fraud monitoring. Our architecture ensures PCI DSS compliance, TLS encryption, and multi-currency support, providing a scalable and secure payment solution.

So, no matter what technology your project uses, it doesn’t matter to us. We can integrate a payment gateway for you on any platform – whether it's a web application, mobile application, or desktop application. All you need to do is contact us and tell us your requirements, and we'll take care of the rest.

How to Choose the Right Payment Gateway

Selecting the right payment gateway is crucial for ensuring smooth, secure, and cost-effective transactions. The ideal solution should balance customer convenience with business needs, offering global reach, multiple payment options, and strong security. Below are the key factors to consider before finalizing an integration for your platform.

Supported Payment Methods

Choose based on cards, wallets, UPI, or subscriptions.

Geographic Reach

Ensure global or local payment acceptance.

Transaction Fees

Compare charges for domestic and cross-border payments.

Integration Complexity

Select SDKs/APIs that fit your tech stack.

Security & Compliance

PCI DSS, AML, and fraud detection features.

Why Us for Payment Gateway Integration

Adequate Infosoft has been engaged in custom software development for over 10 years. Over the years, we have successfully delivered robust, secure, and scalable solutions for various industries. Our journey isn't limited to technical achievements, but also to the trust of our clients and the dedication of our team.

Our deep expertise in the finance and payments domains enables us to design payment systems that not only meet international compliance standards but also support the unique needs of each business.

We understand that, today, security and trust are paramount in every transaction. That’s why we develop payment solutions that are technologically advanced while ensuring a seamless and secure user experience.

Our goal is not just to build software, but to create systems that drive business growth and ensure our clients have a trusted technology partner by their side.

Expertise with Multiple Payment Systems
We integrate SDKs like Stripe, PayPal, Razorpay, and more.
Compliance Best
Practice
Ensuring PCI DSS, AML, and GDPR compliance.
Fraud Prevention Expertise
Tokenization and AI-driven fraud detection systems.
Continuous Upgrade & Maintenance
Regular updates for SDKs, APIs, and compliance.
Transaction Speed Optimization
Faster settlement and reduced checkout latency.
Scalability
Solutions designed for startups to enterprises.

Some of Our Recent Apps with
Payment Gateway Integration

EV System

In this project, we've integrated a payment gateway as well as a wallet payment method. This is an electric vehicle charging platform that features real-time charging sessions, automatic billing, and secure card and wallet payments.

The system is already live and being used by many customers. Available on both mobile and web, the platform delivers a seamless and reliable experience for every user. This project was developed specifically for Denmark.You can find it here:

letel

Bluelionlifestyle

Blue Lion Lifestyle is a fully-fledged e-commerce website that supports card, wallet, and UPI payments. This platform ensures smooth checkout, secure booking, and fast customer onboarding for users.

We successfully integrated the Razorpay payment gateway and SDK into this platform for seamless payment processing.

bluelionlifestyle

Veetickets

Veetickets is a digital ticketing and event management platform that provides a secure booking, ticket purchase, and easy checkout experience for both users and organizers. The platform utilizes integrated payment APIs to ensure every transaction is fast, secure, and reliable.

In this project, we integrated two payment gateways –

Stripe: for internal payment processing
Paystack: for payment collection in Ghana

Thus, Veetickets not only simplifies event management for both organizers and users but also provides global payment support.

veetickets

Leadership That Leads Worldwide

With a physical presence in over 15 countries and a global footprint spanning 25+ countries, we are ready to serve you anywhere. Location, language, or culture is never a barrier, because our global team can work with you in your language. Our strong international team ensures seamless collaboration across borders We have a strong tech team, highly recognized in their domains, with extensive technical expertise.

Payment Gateway SDK Integration Services | Secure & Scalable