Payment Processing Software
E-commerce payment processing software enables fast and secure payment transactions. Custom systems we at SECL Group specialize in are tailored to accept payments on various devices and provide better customer service.
About Payment Processing Software Solutions
Financial transactions are an integral part of retail businesses. With the growth in digital purchasing, a smooth payment experience is a must. Software for payment processing is suitable for various payment methods. They differ from credit/debit cards to mobile payments and numerous digital wallets, including those for international transactions. They also play a pivotal role in enhancing transactional security, deterring fraudulent activities, and achieving essential compliance.
The automation prowess embedded within these solutions negates the need for manual data entries, minimizing human-induced errors and ensuring rapid transaction processing. Consequently, businesses can offer faster checkout experiences.
By accepting varied electronic payments, businesses organically expand their clientele, as customers are more likely to make purchases if they can conveniently pay with their preferred method. Advanced features even allow the addition of region-specific payment gateways, amplifying the user experience.
Modern solutions also prioritize data security. Advanced encryption, tokenization, and fraud detection mechanisms ensure payment information security. Their versatility lets them integrate seamlessly with other operational software, such as accounting systems, CRM platforms, and ERPs.
Features
Payment processing system
- Payment gateway integration
- Visitor tracking
- Email campaigns
- Lead scoring
- PCI compliance
- Payment tokenization
- Split payments
- Third-party system integration
- Multi-channel support
- Supporting multiple payment methods
- Fraud detection and prevention
- Event tracking
- Forms and landing pages
- Recurring billing
- Customizable checkout
- Digital invoicing
- Customer authentication
- Batch processing
- Lead management
- Automated data entry
- Audience segmentation
- Subscription management
- Real-time reporting and analytics
- Refund and dispute management
- Multi-currency support
- Payment retry
- 3DS protocols
Work Process
Payment processing software development with SECL Group includes several stages, each requiring its own team of specialists. As a rule, special attention is paid to integrations with other e-commerce software.
1
Project planning
We create tasks, plan our work, and set priorities.
Team:
- Project Manager
2
Business analysis
We analyze the client’s infrastructure, develop task specifications, and look for solutions for the client’s problems.
Team:
- Project Manager
- Business Analyst
3
UI/UX design
We create usable and appealing interfaces for various audience groups.
Team:
- Project Manager
- Business Analyst
- UI/UX Designer
4
Back-end development
We develop the server side.
Team:
- Project Manager
- Business Analyst
- UI/UX Designer
- Back-end Engineers
- Manual QA Engineers
5
Front-end development
We develop the user side.
Team:
- Project Manager
- Business Analyst
- UI/UX Designer
- Front-end Engineers
- Manual QA Engineers
6
Integrations
We analyze the software to be integrated and complete two-side integrations.
Team:
- Project Manager
- Business Analyst
- UI/UX Designer
- Front-end Engineers
- Back-end Engineers
- DevOps Engineers
7
Testing
We perform various types of testing: manual, automated, unit, and integration.
Team:
- Project Manager
- Manual QA Engineer
- QA Automation Engineer
- Back-end Engineers
8
Implementation and training
We develop training materials and implement the system in the client’s company.
Team:
- Project Manager
- Technical Writer
- DevOps Engineers
- Support Engineers
Our Clients
We develop large projects for clients across 27 countries, a significant number of which are featured on the Fortune 500 list.


Our company specializes in projects for
Retail & E-commerce
Why Do You Need It?
When it comes to handling financial transactions, retailers face many challenges, including high levels of declined payments. But by working with payment processing software developers from SECL Group, you can eliminate almost all of them, including the following:
High transaction volume
Your company handles vast transaction volumes
Security issues
You want to improve payment security
Multiple sales channels
You work with various sales channels
Manual processing issues
You deal with manual processing errors
Lack of analytics
You want to receive robust payment and sales analytics
Ineffective reconciliation
Payment reconciliation is inefficient
Unorganized transactions
Your transactions lack organization
Fraud issues
You deal with financial losses due to payment fraud
Few payment options
You offer limited payment options for your customers
Elaborate transactions
You receive complex international payments
High commissions
You have high transaction commissions
No subscription
You can’t offer a monthly subscription
High level of refusal
The high refusal rate for card payments
Transaction loss
You lose a part of your payments
International payments
Many transactions from other countries
Need a payment processing solution?
Enable fast and secure payments by building a payment processing system with SECL Group.
Our Standards
In our work, we follow international approaches and standards such as:
| Management: | PMP |
| Design: | ISO 9241-210 |
| Programming: | Coding conventions, MDN Web Docs, Naming convention |
| Python: | PEP 8 |
| JS/TS: | ECMA, JavaScript Standard Style, Google TypeScript Style Guide, ESLint |
| PHP: | PSR |
| С#: | ReSharper |
| HTML/CSS: | W3C |
| Security: | GDPR |
| Testing: | ISTQB |
Technologies
We specialize in specific technologies, with the technology stack chosen based on the project’s purpose and requirements
Programming languages:

Web / Frameworks:

Databases / Data storage:
DevOps containers:
DevOps automation:
DevOps CI/CD:
DevOps monitoring:
Testing:
Clouds:
Results
Providing a wider range of payment options
Enhanced security with robust measures
Streamlined payment process
Enabling real-time analytics and reporting
Efficient chargeback management
Better customer experience
Enhanced lead management
Handling large transaction volumes
Faster transaction processing
You can offer a monthly subscription
Low transaction commissions
No refusals for payments from other countries
FAQ
Here are our answers to some frequent questions about payment processing software development. If you have another question on this topic, get in touch with us and we’ll be happy to discuss it with you.
How do we evaluate whether a vendor is a good fit for building a payment solution?
It usually comes down to how the team approaches real transaction flows and integrations. SECL Group’s team focuses on connecting payment systems with other platforms in a way that keeps operations stable as volumes grow.
How does a vendor support payment systems after launch?
Vendors usually continue working with clients after launch to monitor performance and refine payment flows. Post-launch support for payment processing sofware usually includes adjusting integrations and improving transaction success rates.
How do development teams work on reducing payment failures?
Teams with experience in building retail systems, such as SECL Group, review how the payment flow behaves in real-life scenarios, including how systems respond to errors. Small adjustments to the integration logic or handling edge cases can make transactions more consistent.
What does the design phase look like for payment processing flows?
The design stage for payment processing software focuses on how users move through checkout and how the system responds behind the scenes. This includes structuring interactions to provide a seamless experience while keeping integrations with retail platforms and payment gateways consistent.
What does QA phase look like for payment processing systems?
Testing payment processing software involves simulating real transactions, including failed payments and timeouts. Providers tend to validate how the system behaves under different conditions to make sure payment flows remain consistent.
What kind of business outcomes can you expect from building payment processing software?
SECL Group pays much attention to improving transaction reliability and operational visibility. Our approach connects payment processing with other systems like ERP and analytics. This way businesses process payments and also better understand revenue flows and customer behavior.
How to estimate the cost of building a custom payment processing system?
Costs depend on many factors, including the number of integrations, supported payment methods, and compliance requirements. Teams like SECL Group usually execute thorough requirement analysis to provide accurate estimates before development starts.
How to build payment processing systems for businesses that operate in multiple regions?
These projects involve dealing with multiple currencies, local requirements, and integrations, which adds complexity. SECL Group’s team is often involved in projects where payments need to work across different markets thanks to their experience with retail systems.
How are third-party payment gateway integrations typically handled?
Integrations are implemented as a separate layer in payment processing software development to keep the system flexible. Developers usually structure this so gateways can be easily updated or replaced without affecting the rest of the payment flow.
How do teams iterate on payment systems after the initial release?
Iteration is based on real transaction data and user behavior. Experienced teams like SECL Group make gradual adjustments to payment processing software to improve reliability and adapt to new payment methods or business requirements over time.





