Hand holding a smartphone displaying a mobile app with a contactless icon next to graphic elements illustrating a secure payment gateway Hand holding a smartphone displaying a mobile app with a contactless icon next to graphic elements illustrating a secure payment gateway

Payment Gateway Integration Services for Regulated Industries

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Build a compliant payment infrastructure with Neontri

Navigating strict regulatory frameworks shouldn’t hold back your financial technology.
We design and deploy custom payment gateway integrations tailored specifically for banks, fintechs, and enterprise organizations,  where bulletproof security and regulatory fit are non-negotiable.

Neontri payment gateway integration capabilities built for regulated tech stacks

API gateway integration

API gateway integration
Our engineers create a centralized API management layer that routes, monitors, and controls payment traffic across multiple provider connections.

Legacy system integration

Legacy system integration
We bridge existing core banking or ERP infrastructure with modern payment applications without replacing systems that already work.

Custom connectors

Leveraging 10+ years of custom software development experience, our team can build bespoke integration components for non-standard payment systems where off-the-shelf adapters don’t fit the architecture.

Webhooks for payment workflows

We set up real-time, event-driven notifications that trigger downstream actions the moment a payment status changes.

Secure integration architecture

Our engineers apply data integrity controls and encrypted transport at every layer of the integration, tailored to your environment’s requirements.

Third-party risk and verification service integrations

Our team connects identity verification, fraud scoring, and AML screening tools directly into the payment flow.

Mobile payment scheme integration

We support mobile-first payment schemes and digital wallet protocols used across consumer and enterprise channels.

Multi-gateway routing logic

Our engineers design integration architecture that supports routing rules across multiple gateways based on transaction type, geography, or fallback conditions.

Tokenization-ready integration design

We structure payment data handling to support tokenization at the integration layer, reducing exposure across connected systems.

Reconciliation feed integration

We connect payment gateway output to internal reconciliation and reporting systems so finance teams get clean, structured data.

Sandbox and staging environment setup

Our team sets up isolated test environments that mirror production behavior, letting QA teams validate flows before go-live.

Payment gateway integration for high-risk verticals

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Banking

We deliver payment gateway integration built around regulatory requirements, reconciliation accuracy, and audit-ready transaction records, giving institutions infrastructure that holds up under financial oversight.

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Fintech

Neontri creates payment infrastructure designed for platforms that need to scale fast while meeting the same compliance and security bar as traditional banks.

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Enterprise

Our experts create multi-gateway, multi-currency integrations built to fit complex treasury and compliance structures, connecting Fortune 500 and top European businesses to the providers their operations require.

From kickoff to go-live:
How payment gateway integration engagements run

Close-up of architects or engineers working on technical blueprints and project specifications at a desk with a ruler and laptop

01

Discovery and scoping

We map out your current architecture, regulatory obligations, and technical constraints to define a clear integration scope with established project boundaries and success criteria.

02

Architecture design

The integration architecture is designed to fit the existing stack and the compliance requirements, resulting in a comprehensive technical blueprint ready for development sign-off.

03

Development

Our team builds the core gateway connections, configures secure data flows, and aligns external systems to deliver a fully functional payment integration in a staging environment.

04

Testing and QA

Our engineers run rigorous functional, load, and compliance testing across all payment flows to ensure there are no critical defects before any production deployment.

05

Deployment

We execute a controlled production rollout using structured go-live procedures, continuous monitoring, and predefined rollback protocols to protect business operations during launch.

06

Post-launch support

Following go-live, we provide structured support through the stabilization period and beyond. Deliverables include defined SLAs, escalation paths, and detailed technical handover documentation to support your operational stability through transition.

Ready to turn your requirements into a working plan?

TALK TO OUR TEAM

Security and compliance built for regulated payment environments

Regulated industries don’t get second chances on security. Banks, fintech platforms, and enterprise payment operations carry compliance obligations that turn integration partner selection into a risk decision, not just a technical one.  Neontri approaches every integration with that risk in mind, building payment infrastructure for major European banks, including PSD2-compliant open banking hubs and mobile payment schemes.

01

PSD2-compliant architecture

Neontri builds open banking integrations to the standard from the start, rather than retrofitting them later.

02

Secure API design

Our experts scope encryption requirements and data integrity controls at the architecture stage, before development even begins.

03

Third-party risk coverage

We handle identity verification, fraud scoring, and AML screening integrations as part of the engagement scope.

04

Regulated-industry track record

Neontri has delivered payment infrastructure for major European banks and fintech clients operating under strict oversight.

What you get with Neontri’s payment gateway integration services

Neontri provides end-to-end payment gateway integration, taking full accountability from initial architecture through post-launch maintenance. We ensure your system remains stable, compliant, and reliable long after go-live without leaving your team to troubleshoot unfamiliar infrastructure.

On-time, on-budget delivery

A clearly defined development plan with established phase boundaries, timelines, and budgets set before development begins.

Top-down view of a team collaborating over project schedules, charts, laptops, and coffee cups at a wooden table

Lower infrastructure costs

Integration architecture optimized for the existing stack, reducing redundant components and operational overhead.

Built-in compliance coverage

Regulated-industry requirements addressed in the architecture itself, not retrofitted after delivery.

Stable operation post-launch

A fully built and rigorously tested payment gateway integration designed for stable operation in production environments.

Modern data center hallway lined with clean white and black server racks, representing stable payment system hosting

Secure and scalable integration  design

A payment gateway integration built to handle growing transaction volumes and evolving regulatory requirements without rearchitecting.

Abstract 3D architectural wireframe with blue cubes, symbolizing scalable software integration and system infrastructure

Long-term alignment

Continued work toward business objectives beyond go-live, so the integration keeps serving the strategy as it changes.

Why a regulated payment integration isn’t a job for a generalist

Choosing the wrong integration partner in a regulated environment doesn’t just slow delivery – it creates compliance exposure that surfaces after go-live. The table below shows where specialization matters.

Dimension

Neontri

Generic integration provider

Regulated-industry experience

Banking, fintech, enterprise systems

No vertical specialization

PSD2 / open banking compliance

Built into delivery scope

Typically out of scope or client-managed

Delivery framework

Proprietary NEAF framework structures every engagement

No documented regulated-industry methodology

Post-launch support

Defined support scope agreed at engagement start

Variable, often ends at handoff

Client retention

High repeat engagement rate across regulated clients

Not tracked or published

Ready to scope your payment gateway integration?

 

Tell us about your stack, compliance requirements, and projected timeline, and we’ll prepare an overview of what the engagement might look like.

BOOK A DISCOVERY CALL

What payment gateway integration costs

Payment gateway integration projects don’t have a fixed price, because the real cost depends on decisions specific to the technical architecture and project constraints. Neontri scopes each engagement before committing to a number, working on either a time-and-materials or fixed-scope basis depending on how well-defined requirements are at the start. Several key factors directly influence total integration costs.

Legacy system complexity

Older infrastructure typically requires more custom bridging and longer testing cycles.

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Ongoing support needs

Post-launch maintenance and monitoring are scoped separately from the initial build.

Workstation showing financial performance charts and analytics graphs on computer screens and a tablet, representing post-launch maintenance

Compliance requirements

Regulated industries carry additional security and audit obligations that affect delivery scope.

Futuristic digital illustration of a bank building with a central padlock icon, symbolizing regulatory compliance and security infrastructure

Project timeline

Compressed delivery windows affect resource allocation and overall engagement cost.

Computer screen displaying a project management timeline with a red progress bar and milestone markers

Still evaluating? A scoping call costs you nothing

 

If you’re still weighing options, a discovery call is the right next step. We’ll scope your payment gateway integration requirements, identify any compliance constraints,

and give you a clear picture of what the engagement entails before you decide.

BOOK A SCOPING SESSION

Why a general-purpose shop
creates compliance risk
in regulated payment
environments

Open banking frameworks like PSD2 demand nuanced interpretation, not just endpoint mapping. Generalist teams learn regulatory nuances on the project, absorbing time and budget when audit gaps delay launch.

Major European banks run core systems that predate modern API conventions. Connecting to them requires hands-on experience with specific patterns those stacks impose rather than generic API integration skills.

Regulated payment flows require robust controls beyond standard API hardening. While a generalist dev shop builds strictly for the launch date, a specialized team delivers the domain continuity required to maintain compliance long after go-live.

Gateways update, regulations shift, and edge cases surface in production.

A generalist dev shop builds for the launch date; a specialized team provides the domain continuity required to maintain compliance over time.

Payment rails constantly evolve as gateways update, regulations change, and edge cases hit production. Generalist shops deliver one-time builds and lack the domain continuity needed for long-term maintenance.

Compliance documents and regulatory dashboards in a modern office
Legacy banking hardware connected to API systems in office
Payment verification devices surrounded by security layers in office
Gateway maintenance equipment beside payment monitoring dashboard in office

Smart solutions start here
Let’s talk about your next big idea

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