When a potential customer looks for the products they need and adds them to the shopping cart in an online store, the decisive moment of the entire sales funnel begins — checkout. Today’s users need instant, simple, and transparent online payment that can be completed in just a few clicks on the order checkout page.
Properly implemented online payment integration is the bridge between user interest and real money in your bank account. Any delay, platform loading issue, or overly complicated data entry form can instantly turn a buyer into a lost lead.
The NextDoorCoders team provides payment integration on websites for new stores and for existing projects that need payment module improvements. The integration process is predictable and does not get delayed at the testing stage.
Why a Website Needs Online Payment
Online payment is an essential part of modern e-commerce. It helps automate financial processes, reduce the workload on managers, and decrease the number of errors during payment processing.
Modern payment systems support different payment scenarios: card payments, Apple Pay, Google Pay, installment payments, and international transactions. For websites built on Laravel, OpenCart, WooCommerce, and WordPress, it is important to correctly integrate the payment system with order logic, warehouse accounting, and analytics. The stability of the company’s operations and the buyer’s overall experience depend on it.
Overview of Popular Payment Services
The market offers a variety of payment services for websites, each with its own technical, financial, and legal specifics. For working with a Ukrainian audience, the basic options are LiqPay, Fondy, WayForPay, as well as direct acquiring from leading banks such as Monobank and PrivatBank.
| Service | Advantages | Best for |
|---|---|---|
| LiqPay | Deep integration with Privat24. The service supports bank cards, Apple Pay, Google Pay, and has a convenient payment system API for integration with different CMS platforms | Mass e-commerce and retail businesses |
| Fondy | Flexible customization of the payment page design and convenient work with international cards | Stores with international payments in multiple currencies |
| WayForPay | Simple widget setup, convenient work with subscriptions and recurring charges | SaaS services, recurring deliveries, and small businesses |
A NextDoorCoders specialist notes: “Each service uses its own payment gateway and has different rates, connection terms, and functionality levels. When choosing payment systems, it is worth looking at the speed of fund settlement to the current account, the convenience of the personal account for accounting, and the availability of a mobile app for monitoring transactions in real time.”
Choosing a Payment Service for Your Business
The choice of payment systems for a website depends on the business model. Before integration, it is worth considering:
- transaction volume and frequency;
- the need for advanced features such as multi-currency payments, automatic refunds, recurring payments, or integration with ERP systems;
- payment system commission. It varies depending on the service, card type, and product category;
- the availability of a ready-made module for your platform, such as WordPress or OpenCart;
- the need for recurring payments or subscriptions.
At NextDoorCoders, we analyze these parameters at the technical specification stage, so payment services for websites are selected according to specific business goals. This helps the client avoid overpaying commission where a more favorable tariff can be connected.
Stages of Payment System Integration
Online payment setup is a process made up of several consecutive steps:
- registration of a merchant account in the selected payment system and confirmation of company details;
- receiving API keys and connecting the payment system API to the website;
- setting up online payment and its interaction with the company’s business processes;
- configuring payment status notifications;
- test transactions;
- switching to live mode and monitoring the first real payments.
The NextDoorCoders team records each stage in the technical specification, so the store owner knows in advance when online payment on the website will be tested and fully integrated.
Payment Security and Data Protection
Payment security is a requirement without which the payment system will not work. The PCI DSS standard defines how card data must be processed. In particular, the website must not store the card number or CVV in its own database. This data is transferred directly to the payment system through a secure connection.
During development, the NextDoorCoders team ensures:
- a mandatory SSL certificate across the entire website;
- customer data protection through tokenization;
- limiting multiple payment attempts to protect against card data capture;
- logging failed transactions.
For WordPress stores, we also check payment system plugins for update relevance.
Payment Testing Before Launch
Before opening payment for real customers, we run payment testing. We check:
- successful card payment from different banks;
- a declined transaction due to insufficient funds or card blocking;
- correct amount calculation when discounts, promo codes, or delivery fees are applied;
- refunds and partial order cancellations;
- correct webhook operation after payment.
A NextDoorCoders specialist notes: “The most common mistake in self-service integration is testing only the successful payment scenario. We always check declined payments and refunds as well, because these are exactly the scenarios where customers contact support.”
Why Choose NextDoorCoders
Payment service integration makes it possible to ensure stable operation of all business processes, fast order processing, and reliable protection of financial transactions.
The NextDoorCoders team performs online payment setup, integrates popular payment services, and configures interaction with CRM, delivery services, and accounting systems.
We work with new projects and existing resources where current payment systems for websites need to be modernized or replaced. The result is reliable acceptance of payments on the website, convenient for customers and effective for the business.
Payment Service Integration
Fast and secure online payments for your store
Payment Service Integration by NextDoorCoders
What's Included in Payment Service Integration
Audit of the current payment setup
We analyze the existing ways of accepting payments and identify technical limits and the points where customers drop off during checkout.Choosing and connecting a payment gateway
We help you choose between LiqPay, Fondy, WayForPay, Stripe or PayPal based on your business model, then connect the selected service.Integration with CMS and CRM
We set up the payment module to work with your site on WordPress or OpenCart, as well as with your CRM and order accounting systems.Secure Data Transfer
We set up a protected connection, ensure correct transfer of payment data to the service, and check that the website does not store bank card data.Testing payment scenarios
We check successful and declined transactions, refunds, and correct totals with discounts and promo codes before launch.Launch and Operation Check
We switch payments to live mode, check the first real transactions, and verify that order statuses are updated correctly on the website.Who Needs Online Payment Integration
- →New online stores launching payment acceptance for the first time.
- →Existing websites that want to add a new payment service or replace an old one.
- →Businesses transitioning from cash-on-delivery to online payments.
- →Companies that need to integrate payments with CRM or inventory management.
- →SaaS services and platforms with subscriptions or recurring payments.
- →Website owners who want to reduce fees or increase payment conversion.
What Problems Payment Service Integration Solves
Customers dropping off at checkout
A slow or complicated payment form makes buyers abandon their cart before completing the order.Limited choice of payment methods
Missing cards, Apple Pay, Google Pay or other convenient options lowers trust and hurts conversion.Manual payment processing
Managers reconcile payments by hand, which slows down order processing and increases the risk of mistakes.Security risks from poor integration
An incorrectly configured payment service raises the risk of customer card data being exposed.Unclear reasons for declined transactions
Without proper testing it’s hard to tell why a customer couldn’t complete a payment.Incorrect Order Statuses
If the website receives payment statuses incorrectly, orders may remain unpaid, be duplicated, or move into processing with a delay.How Payment Service Integration Works
Audit of the current payment setup
We analyze which payment methods already work on the site and define the business requirements before connecting a new service.
Choosing a payment service
We pick the best fit among LiqPay, Fondy, WayForPay, Stripe or PayPal based on your niche and transaction volume.
Technical spec and integration
We prepare a technical specification and connect the payment module to your site on WordPress, OpenCart or another platform.
Secure Payment Transfer
We set up a protected connection, check correct data transfer to the payment service, and remove the risk of card data being stored on the website.
Testing and launch
We check every payment scenario, from a successful charge to a refund, then switch on real payment acceptance.
Order Status Check
After launch, we check whether the website correctly receives payment statuses, updates orders, and sends data to the CRM or accounting system.
Why Choose Us
Experience with LiqPay, Fondy, WayForPay
We connect the leading payment services on the Ukrainian market and direct bank acquiring — we know the tariffs, API and requirements of each provider.Secure Payment Data Transfer
We set up a protected connection, SSL certificate, and correct transfer of card data directly to the payment service without storing it on the website.Provider Matched to Your Business
We factor in transaction volume, recurring payment needs and provider fees, so you never overpay when a better rate is available.Transparent Integration Stages
Every step, from merchant account registration to going live, is fixed in the technical brief, so payment setup timelines stay predictable.Testing Before Launch
We check not only successful payments but also declined transactions, refunds and correct webhook behavior — so there are no surprises with real customers.Support After Launch
We monitor the first real payments, refine the payment module and keep plugins updated if the store runs on WordPress.
Back-End (development) 
Front-End (web implementation) 
Payment integrations 
Integration with delivery 
Analytics and pixels 
Mailing systems 
Marketplaces, Feeds, CRM, Bots, and Messaging 
Flexible integrations 
Turnkey website development from NextDoorCoders — creating quality websites for your business
We have been working with NextDoorCoders since 2023, and during this time we have been convinced of the high level of service provision and professionalism of the team. During this period, we managed to work both together at the sales stage (we closed seo at the development stage, the partner – site development), and as a team on projects, marketing activities, exchange of insights/hypotheses.
Our clients are grateful for the individual approach to each project, which makes cooperation even more effective. After all, the ability to choose a solution and technology and calculate various implementation options makes NDC quite flexible.
Thank you to Volodymyr and his team for quality, responsibility and joint movement towards the result! 🚀
We would like to separately note the ability to find solutions even in complex tasks – this is what truly distinguishes NextDoorCoders from others. The team does not just complete the task, but offers optimal options to achieve the best result. We were convinced of this on joint projects.
Openness to multifaceted partnerships has also allowed us to be active in marketing: implementing joint cases, being active in the infospace, and writing joint publications on social networks.
Such comprehensive cooperation allows us to be more competitive.
We have been working with NDC since the beginning of 2021. We had a task to find developers who would improve the functionality and support our project and several self-hosted websites. It took us a while to find specialists, as we were getting rejected because we were using an outdated framework. However, NDC stepped in to help, and we quickly agreed to cooperate.
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Our company, All-Ukrainian Management Systems, specialises in implementing and configuring business management systems. We help companies automate processes, increase efficiency and scale their operations.
One of the most frequent requests from our clients is the creation of B2B portals that allow them to optimise interaction with partners and customers, automate orders, improve process control, and reduce costs.
In such projects, we rely on our reliable partners, NextDoorCoders (NDC). This team has deep technical knowledge and practical experience in implementing B2B platforms. NextDoorCoders: professionals in their field, responsible, result-oriented, always offering the best technological solutions and effective teamwork.
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About 6 months ago, we needed to finalise our new rentsoft.ua website, which was handed over to us in an unfinished form by our previous contractors. We decided to find a replacement for them, as the speed of task completion and communication were important to us. On recommendation, we were offered to work with NDC. The recommendation met our expectations.
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Constant daily communication and quick turnaround time have always given us a sense of confidence that the project is being handled and that the contractor values its customers.
I’ve been looking for smart and reliable specialists to improve my website for a long time, and I was finally lucky. The challenge was that the website was not developed by professionals and had numerous issues in its code, which made everyone unwilling to review it.
I communicate with Vladimir, and the tasks are solved as quickly and efficiently as possible.
It’s a pleasure to work with such people. Thank you very much!
We have been successfully working with NextDoorCoders since August 2024. During this time, they have provided fast and high-quality support, significantly improving our website’s performance and user experience through professional recommendations and ongoing technical support.
We have been cooperating with the NextDoorCoders web studio since the beginning of 2024. During this time, the studio has established itself as a reliable technical partner who is attentive to the client’s needs. The team regularly provides professional recommendations on improving the site, performs work on SEO-technical tasks and qualitatively refines the functionality.
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We have a pleasant experience of cooperation with the NextDoorCoders web studio, which has been helping us with the finalization of the site’s functionality since the end of 2024. The team is always in touch, responds quickly to requests and pays attention to all details. All tasks are performed qualitatively and within the agreed deadlines. We especially appreciate the ability to delve into the specifics of the business and offer appropriate solutions. Communication is easy, open and constructive. We sincerely recommend NextDoorCoders as a reliable partner in the field of web development.
We have been working with NextDoorCoders since 2021.
We ordered the development of a CRM for production process management from them.
The team understands business needs perfectly: they implemented a convenient system for accounting for orders, controlling production, and automating many routine processes. We are constantly improving the functionality together with them.
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We collaborated with the NextDoorCoders team on the creation of our website and were very satisfied. The work was done quickly, clearly and qualitatively. All our wishes were taken into account, and corrections were made without unnecessary delays.
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The website works stably, looks modern, and we are already receiving positive feedback from clients. There were no difficulties during the cooperation.
Thank you to the team for their approach and professionalism! We will be happy to contact them again if we have the opportunity.
On behalf of our company, we would like to express our gratitude to the NextDoorCoders team for their cooperation in the implementation of several projects, including the European startup Cooontacts. This product is designed to solve the language barrier problem in Europe – to give businesses the opportunity to find customers in their native language and, conversely, to help people quickly find those who speak their language. The task was not easy, the development environment was quite complex, but all the necessary functions were implemented within the agreed deadlines.
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As a result, we got not just contractors, but reliable partners with whom it is pleasant to work. Thank you NextDoorCoders for your professional approach, flexibility, and responsibility — we look forward to new joint projects.
NextDoorCoders has been providing technical support for our website for a long time. Working with them is convenient: they are always available, respond quickly to requests, and do everything accurately and without unnecessary reminders. We have been working together since 2021, and during this time, we have had no complaints. The team is responsible, attentive to detail, and simply pleasant to communicate with. We recommend them!
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NextDoorCoders created a modern, intuitive and functional website for us, which fully meets our business requirements.
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Since the start of work in 2023 and after the launch – the site has been working stably, and technical support always responds quickly to our requests.
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Our collaboration began when the team built our website from scratch in 2019, and they’ve been maintaining it ever since. Not only are they experts in their field, but they also genuinely care about the success of our store. Working with them is easy and a pleasure!
Working with the NextDoorCoders team was a smooth and pleasant experience. They assisted us with development on the OpenCart platform, were actively involved in the project, and were always available to communicate. We appreciated their responsible approach, clear communication, and attention to detail. All issues were resolved quickly and without any unnecessary complications. Thank you for your collaboration, and we wish them continued success and exciting projects!
