The platform is the product, so every gap in it shows up in your own sales cycle.
Oxagile extends processing cores, adds acquirer connections, builds merchant onboarding and sub-merchant management, and keeps scheme certification on schedule.
Payment solution software development demands careful planning across infrastructure, integrations, and compliance. We design and build fintech systems that deliver secure and intelligent performance under real-world demands.
Our engineers speak at fintech conferences about failure modes nobody puts in case studies. Show us your build and we’ll tell you what’s coming.
Maksim Narushevich
Senior Software Engineer
Stripe and AWS-certified full-stack engineer. Built core payment infrastructure including the Ledger service for credits, refunds, and payments, and a transaction system that lifted company revenue by 11%.
Andrey Karazey
Full Stack Developer
Full-stack developer with 10+ years at Oxagile. Delivered 3DS upgrades, Apple Pay integration, and a live Checkout.com-to-Braintree migration for a platform with 1.5M active subscribers.
Meet the engineers behind Oxagile’s payment software practice.
Own the transaction lifecycle end to end:
A payment gateway integration shaped around your merchants:
A provider-agnostic layer you own and control:
The payment surfaces your customers meet:
Move funds between people, businesses, and borders:
Reconciliation and ledgers prove where every cent sits, on demand:
Service The platform is the product, so every gap in it shows up in your own sales cycle.
Oxagile extends processing cores, adds acquirer connections, builds merchant onboarding and sub-merchant management, and keeps scheme certification on schedule.
Banks Core systems that predate most of your engineering team still process the money, and taking them offline isn’t on the table.
Oxagile’s team adds digital channels on top, connects instant payment rails, and modernizes module by module against the live system. The core keeps running the whole way through.
Product You ship payment software to your own customers, which makes our work part of your release, brand, and support burden.
The team at Oxagile adds modules, opens new markets, and prepares white-label deployments inside your existing cadence. Engineering capacity with no hiring cycle attached.
Paytech Payments are the product, and the calendar is set by certification windows and funding rounds.
Oxagile’s payment platform development service covers the money path, hardening for volume you don’t have yet, and the run through processor integration and scheme certification. Built for the timeline you’re working to.
Marketplaces Money moves in more than two directions here: buyers, sellers, service providers, and your own take.
Oxagile’s engineers build split payments, escrow and delayed release, seller KYC, and payout APIs that handle scale and edge cases alike. Every party gets paid the right amount, on time.
Merchants You carry the payment relationship for someone else’s brand, so a failed renewal costs you twice.
We build dunning and recovery flows tuned to regional issuer behavior, handle multi-currency renewals, and consolidate reporting across providers. Every recovered renewal is a customer you already won.
Feasibility and business case
We model volume, fees, markets, and regulatory scope first. This is the cheapest place to decide against building.
Architecture and security boundary
We lock in the transaction lifecycle, cardholder data boundary, and money invariants. These choices set what the platform costs.
Core build
Authorization, capture, refund, the tokenization vault, and the ledger underneath. Built in tight cycles against real processor sandboxes.
Certification and launch
Processor integration, scheme certification, segmented deployment, observability. We plan the launch around the network’s calendar.
Operate and evolve
Scheme mandates land twice a year, PCI re-validation once. We stay on to absorb them, plus new rails and regions.
Cloud-native • event-driven • hexagonal, domain-owned core
Rust • Go • PostgreSQL (native decimal, ACID) • Redis for idempotency and rate limiting
Kafka • RabbitMQ • AWS SQS/SNS • signed webhooks with dead-letter and redrive
AWS (Lambda, DynamoDB, EKS) • Google Cloud • Microsoft Azure • AWS CDK • Terraform
AWS KMS • HSM-backed key storage • AES-256-GCM • network tokens (VTS, MDES)
Node.js • TypeScript • Python • Java • .NET/C#
Building and maintaining payment systems requires specialized knowledge in PCI compliance, PSP integrations, fraud prevention, and secure transaction handling. A dedicated payment app development company like Oxagile makes sure your infrastructure is reliable, scalable, and optimized for approval rates and user experience.
No engineering team can hand you a certificate, formal validation comes from a QSA and quarterly ASV scans. In payment processing software development, what Oxagile’s team controls is the architecture: we capture card data in hosted fields, tokenize at the earliest point, isolate the vault, and keep your cardholder data environment as small as the design allows. We also prepare the evidence, audit trails, and access controls your assessor asks for, so the audit confirms what was built rather than uncovering it.
The hard part is the tokens: a token issued by one processor rarely works with another, so Oxagile’s fintech experts start by mapping what can move, what needs network tokens, and what requires re-collection from customers. Migration runs with both providers live, traffic shifted in controlled increments, and reconciliation checks comparing the two on every batch. Rollback stays available at each increment until the numbers hold.
Both, and the choice depends on how much control you need. Oxagile configures and extends commercial platforms like Primer, which take weeks of routing, retry, and lifecycle tuning before they earn their keep. We also build orchestration layers you own outright, with processors and wallets behind runtime ports, which is the right call when vendor limits or PSP lock-in have already cost you.
Our online payment processing software developers work in your repositories, your review process, and your sprint cadence, with a named delivery lead accountable for the engagement. Security teams get threat modeling sessions and design reviews at the architecture stage, not a finished system to approve. Product gets the same standups and the same backlog as everyone else.
Absolutely. Experienced online payment processing software developers like those in Oxagile’s talent pool can work across time zones, managing integrations, monitoring performance, and scaling infrastructure. Such teams have ample technical expertise and operational discipline to maintain uptime, compliance, and smooth user experiences worldwide.
A payment app development company such as Oxagile integrates advanced features in various ways. For fraud detection, they can utilize third-party fraud prevention APIs that analyze transaction patterns for suspicious activity, as well as AI-powered algorithms to monitor user behavior and detect anomalies in real-time. Multi-currency support is implemented through global payment gateways and currency exchange APIs. To achieve real-time transactions, the app is connected to secure payment networks for fast and reliable processing.
