Payment Software Development Services

Compliant. Multi-Rail. Production-Ready.
Custom payment gateway development, payment processing systems, digital wallets, and payment orchestration platforms — PCI DSS Level 1-compliant, multi-currency, multi-rail payment engineering for fintech and enterprise.
Reliable partner
Reliable partner
Experienced team
Experienced team
Smart solutions
Smart solutions
Payment Software Development 1920
Payment Software Development 1440

Industry Leaders We Work With

“The global payment gateway market is projected to reach $44.49 billion by 2030, growing at 27.7% CAGR.” — Grand View Research

Outdated payment software creates fraud risk, transaction failures, and integration debt. Zoolatech delivers scalable payment systems built for modern rails and compliance standards.
Domain Expertise

Payment Software Engineering Built for Scale and Compliance

Building a payment system requires engineering depth across PCI DSS scoping, payment network integration, fraud detection, and real-time transaction processing, capabilities that generic payment software companies cannot deliver from first principles.
PCI DSS at architecture level

PCI DSS at architecture level

PCI DSS Level 1 compliance requirements are scoped before development begins — tokenization, point-to-point encryption, and SAQ boundaries are design decisions, not retrofit patches added before audit.
Multi-rail payment integration

Multi-rail payment integration

ACH, SWIFT, SEPA, FedNow, RTP, and card network integration built by engineers who understand payment rails and payment processes — not REST API wrappers around third-party SDKs.
Fraud detection built in

Fraud detection built in

ML fraud scoring, velocity checks, 3DS2 authentication, and device fingerprinting are standard payment software outputs — not optional third-party plugins added after development.
AI-governed fraud detection

AI-governed fraud detection

Fraud detection ML models built with structured governance, continuous monitoring, and documented controls for regulated payment environments requiring audit readiness.
Payment orchestration

Payment orchestration

Intelligent routing across multiple PSPs — Stripe, Adyen, PayPal — with failover logic, cost optimization, and unified reporting built into the payment orchestration platform.
60% senior engineers

60% senior engineers

Senior payment software developers with 5-plus years of domain experience lead every engagement — not junior development teams learning payment network integration on your project budget.
Proof from production

Proof from production

Modernized payment fraud management systems for a leading US retailer — a published case study demonstrating payment engineering capability at enterprise scale.
300+ projects delivered

300+ projects delivered

Across fintech, banking, retail, and enterprise software — 300-plus completed projects demonstrate the delivery depth that advanced payment platform builds require.
Testimonials

What Our Customers Say

“In the case of Zoolatech, it's a very tight partnership.
The team at Zoolatech is incredibly collaborative, and we work as a team despite being thousands of miles away from each other.”
Spencer Rascoff
CEO Match Group
5/5
“Zoolatech has been a key technology partner for Pandora,
enhancing our software development and deployment capabilities. They're ambitious, supportive, fast-moving, and well-skilled, with sound ethical values.”
Erika Romsics
Contract and Vendor Manager, Pandora
erica
5/5
“The apps they’ve developed give us the opportunity to get more customers.
We’re providing more services to target big customers. We can install jobs faster and identify reduce bottlenecks, so we’re providing a better customer experience.”
Aida Youssef
Senior Director of Software Engineering, Complete Solaria
5/5
“Zoolatech has access to a deep talent pool and knows how to identify client's needs.
With the help of Zoolatech, went from a very early and incomplete prototype to the MVP release, the first production release, and the first paying customer!”
Greg Wagenhoffer
CEO, GreenVisr
5/5
“Zoolatech enabled us to build a world-class engineering team quickly and efficiently.
Zoolatech's pre-screening process and engineer training are customized for providing effective engineers that can contribute immediately to accelerating product roadmaps.”
Shariq Minhas
CTO, SVSG
5/5
“We can recommend Zoolatech
for their talent pool, attention, ability to understand our requirements, candidate screening process and constant communication.”
Chaitanya Pallapothula
SVP, Tailored Brands, Inc.
5/5
“Zoolatech’s developers quickly became an integral part of our team effort
with whom we shared daily stand up calls. Overall, Zoolatech fit well with our needs for agile development and continued to adapt as our needs evolved.”
Forrest Glick
UX Designer, Stanford University
5/5
“Working with Zoolatech has been a driving force in our business offerings.
The team utilizes it's experience and expertise meshing with our internal team creating a positive work environment. Zoolatech is by far one of the best teams to work with in the industry.”
Kris Naidu
CEO, Zeacon
Kris Naidu CEO, Zeacon
5/5
What We Build

Payment Gateway Development Services and Software Solutions

From custom payment gateway development to payment orchestration platforms — payment software solutions tailored to the compliance environment and transaction volumes they operate in.
98%

98%

Client Retention Rate
300+

300+

Successful Projects

Payment gateway

Custom payment gateway development: card acquiring, tokenization, and fraud screening for fintech and enterprise

  • Custom payment gateway development covering Visa, Mastercard, and Amex card acquiring with 3DS2 authentication
  • Tokenization and point-to-point encryption removing raw cardholder data from merchant systems for PCI DSS scope reduction
  • ML fraud screening with velocity checks, device fingerprinting, and real-time risk scoring at transaction level
  • Multi-currency payment gateway support with dynamic currency conversion and FX rate management for global digital payment
  • BNPL payment method integration — installment engine, credit decisioning API, and merchant checkout SDK
  • Develop a custom payment gateway meeting PCI DSS Level 1 requirements from the first architecture review

Payment processing

Payment processing software development: transaction routing, settlement, and dispute management

  • Transaction routing across payment networks — ACH, SWIFT, SEPA, FedNow, RTP, and card networks
  • Settlement and reconciliation engine covering multi-currency, multi-PSP, and multi-entity payment flows
  • Dispute and chargeback management workflow with automated evidence collection and network response
  • Robust payment processing software with real-time transaction monitoring and exception handling automation
  • High-throughput payment processing architecture for enterprise transaction volumes with sub-second latency
  • Payment data reporting and analytics dashboards covering payment processing costs for operations, finance, and compliance teams

Payment orchestration

Payment orchestration software development: intelligent PSP routing, failover, and cost optimization

  • Payment orchestration platform routing transactions across Stripe, Adyen, PayPal, Checkout.com, and Worldpay
  • Intelligent routing rules based on transaction type, currency, geography, and PSP cost to automate payments efficiently
  • Automatic failover to secondary PSP when primary payment gateway returns errors or declines
  • Unified payment reporting consolidating transaction data across all connected payment service providers
  • A/B testing framework for payment routing rules — measuring approval rate and cost impact per route
  • Payment orchestration integration with existing payment system development without requiring full platform rebuild

Digital wallet

Digital wallet development: e-wallet, stored value accounts, and mobile payment integration

  • E-wallet development with stored value accounts, card-on-file management, and P2P transfer functionality
  • Apple Pay, Google Pay, and Samsung Pay merchant integration and tokenization for mobile payment apps
  • Loyalty points and rewards wallet integration connecting payment activity to customer engagement programs
  • Multi-currency digital wallet supporting cross-border payment and FX conversion for global payment ecosystems
  • Digital wallet security — biometric authentication, device binding, session management, and fraud detection
  • Open banking API connectivity for bank account funding of digital wallet balances via PSD2 payment initiation

Cross-border payments

Cross-border payment software development: FX engine, multi-currency settlement, and corridor compliance

  • FX rate engine with real-time currency conversion, spread management, and hedging integration
  • SWIFT GPI integration for high-value cross-border payment tracking and settlement confirmation
  • Corridor-specific compliance mapping — sanctions screening, AML transaction monitoring, and remittance reporting
  • Multi-currency settlement across multiple banking partners and correspondent bank relationships
  • Alternative payment methods integration for corridor-specific local payment networks and digital wallets
  • Flexible payment processing solutions covering EU SEPA, US ACH, and global SWIFT payment rails in a single platform

Billing and subscription

Billing and payment software development: recurring billing, dunning, and revenue recognition automation

  • Recurring billing engine with configurable subscription plans, proration, and mid-cycle change management
  • Dunning management automation — payment retry logic, customer communication, and failed payment recovery
  • Revenue recognition automation meeting ASC 606 and IFRS 15 accounting standards for SaaS and fintech
  • Billing software integration with accounting platforms — QuickBooks, Xero, NetSuite, and Stripe Billing
  • Usage-based billing for consumption-driven payment models with metering, aggregation, and invoicing
  • Subscription payment management supporting free trials, pauses, upgrades, downgrades, and cancellation flows

“Global card fraud losses are projected to reach $41.1 billion by 2030 despite continued advances in AI-driven fraud prevention.” — Yahoo Finance

Fraud prevention is a core requirement for modern payment platforms. Zoolatech builds secure payment software with integrated fraud detection and resilient transaction architecture.
Standards and Protocols

Payment Protocol and Compliance Coverage

Compliant payment software starts with the standards and protocols it must support. Zoolatech builds payment platforms around the compliance frameworks and payment rails required for secure transaction processing.
PCI DSS Level 1

PCI DSS Level 1

The highest cardholder data security standard for high-volume payment environments. Zoolatech designs PCI DSS Level 1 requirements into payment architecture through tokenization, P2PE, and SAQ boundary planning.
ACH and SWIFT

ACH and SWIFT

Core payment networks for domestic and cross-border transactions. ACH and SWIFT integrations support secure payment processing, transaction tracking, and settlement workflows across global payment operations.
FedNow and RTP

FedNow and RTP

US real-time payment rails enabling instant payment settlement. Integration includes message formatting, settlement confirmation, and error handling for real-time payment platforms.
SEPA and SEPA Instant

SEPA and SEPA Instant

European payment rails for domestic and cross-border euro transactions. Support includes SEPA Credit Transfer, SEPA Instant, scheme compliance, and IBAN validation.
3DS2 and EMV security

3DS2 and EMV security

EMV 3-D Secure 2.0 strengthens card-not-present authentication while reducing checkout friction. Implementations cover authentication requests, risk-based exemptions, and issuer ACS integration.
PSD2 and open banking

PSD2 and open banking

PSD2 requires Strong Customer Authentication and open banking access for payment initiation services. Support includes SCA compliance, FAPI security profiles, consent management, and payment initiation capabilities.
Development Process

Payment Software Development Process

Building a payment system requires a structured process covering PCI DSS scope, payment rail selection, and fraud architecture. Zoolatech follows a proven 5-stage payment software development process refined across projects in the US and European markets.
Step 1

Discovery and compliance scoping

Every payment software development project begins with discovery to define PCI DSS scope, payment rail requirements, PSP integration priorities, and fraud detection architecture. The output is a compliance blueprint and delivery roadmap that guides architecture decisions and reduces audit risk.
Step 2

Payment architecture and system design

Zoolatech designs payment platform architecture before development begins, defining transaction routing, tokenization, fraud scoring, settlement workflows, and PCI DSS data flows. This ensures the payment gateway architecture is compliant by design.
Step 3

Development and integration

Payment software development covers payment gateway engineering, PSP API integration, payment network connectivity, and fraud detection implementation.
  • PSP integrations: Stripe, Adyen, PayPal, Checkout.com, Worldpay
  • Payment rails: ACH, SWIFT, SEPA, FedNow, RTP
  • Fraud detection and transaction processing capabilities
Step 4

Security testing and PCI DSS validation

Before production deployment, Zoolatech performs penetration testing, PCI DSS validation, 3DS2 authentication verification, and fraud detection testing. The team also prepares QSA-ready documentation to support compliance reviews and audits.
Step 5

Deployment and ongoing support

Payment software deployment follows controlled change management processes with audit trails and rollback capabilities. Ongoing support covers PCI DSS updates, payment network changes, PSP API management, and fraud model optimization.
Technologies We Use

Payment Software Development Technology Stack

Your payment software development team works with the PSP APIs, payment network protocols, security frameworks, and cloud infrastructure that production payment platforms require.
Stripe API
Stripe API
Adyen
Adyen
PayPal
PayPal
Checkout
Checkout
Plaid
Plaid
Swift
Swift
Stripe Radar
Stripe Radar
AWS Payment Cryptography
AWS Payment Cryptography
Apache Kafka
Apache Kafka
PostgreSQL
PostgreSQL
React
React
Docker
Docker
Kubernetes
Kubernetes
and other
Integrations

Payment Software Integrations Across PSPs, Networks, and APIs

Build a payment software platform that integrates with the payment service providers, networks, and banking APIs your business depends on. Integration requirements are defined during discovery to ensure predictable delivery.
approve

Payment service provider integrations

Stripe, Adyen, PayPal, Braintree, Checkout.com, Worldpay, and Square API integration covering payment gateway connectivity, webhook handling, dispute management, and reconciliation. All integrations are built against current API versions with upgrade planning included.
approve

Payment network integrations

ACH, SWIFT, SWIFT GPI, FedNow, RTP, SEPA, SEPA Instant, Visa, and Mastercard integration for domestic, cross-border, and real-time payments. Payment network connectivity includes message validation, error handling, and settlement confirmation workflows.
approve

Mobile payment integrations

Apple Pay, Google Pay, and Samsung Pay integration for mobile apps, payment terminals, and POS environments. Services include tokenization, transaction authorization, and NFC payment flows for a seamless cross-channel payment experience.
approve

Open banking and banking API integrations

Plaid, MX Technologies, PSD2 payment APIs, and direct banking API integration for account verification, payment initiation, and account funding. Integrations include authentication, consent management, and real-time balance verification across open banking workflows.
Payment software development engagements at Zoolatech are structured for predictable delivery — defined PCI DSS scope, phased milestones, and a payment software development team that owns transaction processing outcomes from the first sprint to production launch.
98%
Client retention rate
96%
Client satisfaction rate
Our Strengths

Choosing the Right Payment Software Development Partner

Fintech companies and enterprise businesses choosing a payment gateway software development company need engineering depth in PCI DSS compliance, payment network integration, and fraud detection — not generic software companies repackaged as payment specialists.

PCI DSS compliance from architecture

Tokenization strategy, SAQ boundary design, and point-to-point encryption defined during discovery — so the payment gateway development project arrives at QSA audit with compliant architecture, not a remediation list.

Payment protocol expertise

SWIFT, ISO 20022, FedNow, RTP, SEPA, ACH, and 3DS2 implemented by engineers with payment network experience — not developers learning payment rails inside your development project timeline and budget.

Fraud detection as a standard output

ML fraud scoring, velocity controls, device fingerprinting, and 3DS2 authentication built into every payment platform as standard deliverables — not sourced from third-party fraud plugins that create vendor dependency and integration risk.

Full-stack payment delivery

Payment gateway development services, processing engine, orchestration layer, fraud detection, and PCI DSS compliance delivered by a single professional payment software development team — the right payment software development partner for fintech and enterprise payment builds.
Industries We Serve

Engineering Expertise Across Industries

Payment software development experience in regulated financial environments transfers directly to healthcare, retail, and logistics technology delivery.
Explore All Industries
Why Choose Us

Why Businesses Trust Us

logo
At Zoolatech, we create engineering teams for industry leaders across the US and Europe — teams that move fast, think big, and deliver strong impact.
96%
Client Satisfaction
300+
Successful Projects
2017
Year Founded
98%
Retention Rate
team sport photo
At Zoolatech, we create engineering teams for industry leaders across the US and Europe — teams that move fast, think big, and deliver strong impact.
Engineering Excellence. Every Time.
main award png (1)
At Zoolatech, we create engineering teams for industry leaders across the US and Europe — teams that move fast, think big, and deliver strong impact.
team sport photo
600+
Employees
Headquarters
USA
Development Centers
PL
UA
MX
TR

Start Your Payment Software Project

Tell us your payment rail requirements, PCI DSS scope, and PSP integration priorities. Zoolatech scopes a compliant payment software development approach within 48 hours.
Questions You May Have

What is payment software development?

Payment software development is the engineering of digital systems that handle financial transactions — including payment gateways that authorize transactions, payment processors that route transactions through networks, digital wallets, payment orchestration platforms that route across multiple payment service providers, and billing systems. PCI DSS compliance, fraud detection, and payment network integration covering SWIFT, ACH, SEPA, and FedNow are core engineering requirements for any payment software.

What is the difference between a payment gateway and a payment processor?

A payment gateway is the technology layer that captures, encrypts, and authorizes a transaction from the customer device — it is the interface between the merchant and the payment network. A payment processor routes that authorized transaction through the payment network to move money between accounts. In custom payment software development, these are built as distinct but integrated components, each with different PCI DSS compliance requirements and payment gateway integration scope.

How do you ensure PCI DSS compliance in payment software?

PCI DSS compliance is scoped at the architecture phase before development begins. Zoolatech designs tokenization to remove raw cardholder data from client systems, implements point-to-point encryption, defines SAQ boundaries, and builds access controls and audit logging into the payment platform. The team produces QSA-ready documentation covering data flow diagrams and encryption key management to support the annual payment card industry data security compliance and re-certification process.

What payment rails and protocols do you support?

Zoolatech builds payment software integrating ACH for US domestic payments, SWIFT and SWIFT GPI for cross-border payments, SEPA and SEPA Instant for EU payments, FedNow and RTP for US real-time payments, and Visa and Mastercard card networks. For message standards, ISO 20022 is implemented for SWIFT and FedNow connectivity. The fraud layer supports 3DS2 EMV authentication for card-not-present payment flows, and PSD2 SCA is implemented for EU open banking payment initiation services.

How long does payment software development take?

A focused payment gateway integration added to an existing platform typically takes 6 to 12 weeks. A custom payment gateway with fraud detection, tokenization, and multi-currency support takes 4 to 8 months. A full payment platform with orchestration across multiple PSPs, cross-border payment capabilities, and PCI DSS Level 1 compliance typically runs 8 to 14 months. Zoolatech defines scope and compliance requirements in a structured discovery phase before committing to a timeline.

What PSPs and payment providers does Zoolatech integrate with?

Zoolatech integrates with Stripe, Adyen, PayPal, Braintree, Checkout.com, Worldpay, and Square — covering payment gateway integration, webhook handling, dispute management, and reconciliation across all connected payment gateways. For bank connectivity, Plaid and MX Technologies provide account verification and funding, with PSD2 open banking APIs for EU payment initiation. Mobile payment integration covers Apple Pay, Google Pay, and Samsung Pay for both mobile payment apps and POS software environments.

What makes Zoolatech a reliable payment software development partner?

The primary differentiators are PCI DSS compliance scoped at the architecture stage rather than retrofitted before audit, payment protocol depth across SWIFT, ISO 20022, FedNow, RTP, SEPA, and ACH, and fraud detection built as a standard platform output rather than a third-party plugin. Combined with ISO 42001-governed fraud ML models and full-stack payment delivery covering gateway, processing, orchestration, and compliance in a single payment software development engagement, Zoolatech operates as a long-term payment software development partner accountable for platform outcomes.

Can Zoolatech build payment orchestration software?

Yes. Zoolatech builds payment orchestration platforms that route transactions intelligently across Stripe, Adyen, PayPal, Checkout.com, and Worldpay — with routing rules based on transaction type, currency, geography, and cost optimization. Failover to secondary payment gateways, unified reporting across all PSPs, and A/B testing for routing rules are standard payment orchestration deliverables. Payment orchestration software can be built as a standalone platform or integrated into an existing payment system without requiring a full rebuild.