FinTech, From the Build Up
Notes from our engineers on payments, lending and AI in finance. Each piece opens on oxagile.com.
Payment Platform Technical Debt, or What Code Reviews Actually Find
A new payment gateway scored 60 out of 100 on an independent code review. What "resilient and scalable" hides when nobody reads the code, and what it costs once you build on top of it.
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Payment Reliability & Observability: Spot Issues Before Customers Do
Monitoring, observability and incident response for payment systems: how to catch failed charges, phantom errors and processor outages before your customers feel them.
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Top Online Payment Service Providers (PSP) [2026]
A 2026 rundown of the leading payment service providers: coverage, pricing models, and how to choose the right PSP for your flows.
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Payment Gateway Integration: Architecture, Best Practices, Costs
A field guide to wiring up payment gateways: architecture choices, PSP selection, PCI scope, cost drivers, and the integration pitfalls to avoid.
Read on oxagile.comPayment Gateway Migration Without Downtime
Migrating payment gateways and PSPs without downtime: the architecture, the risks, and lessons from real migrations.
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AI in Finance: Examples, Use Cases, Applications
Where AI actually moves the needle in finance: underwriting, fraud and document processing, plus the operating-model changes it forces.
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Top 10 FinTech Software Development Companies in 2026
How the leading fintech engineering companies of 2026 compare, and what to look for when you pick a development partner.
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What Is FinTech Software Development
The building blocks of fintech software, the compliance constraints, and what separates a prototype from a production-grade system.
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Payment Gateway Architecture: Diagram, Types, Best Practices
The gateway isn't the payment system. Orchestration, tokenization, the vault, reconciliation and fraud services do most of the work. How to choose an architecture across four variables: volume, geographic reach, compliance, and growth.
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Mobile Payment Gateway Integration: A Custom-Software Playbook
Mobile payments are more than an SDK: backend orchestration, tokenization, webhooks, reconciliation, subscriptions, and monitoring sit behind the in-app checkout. A playbook for selection, architecture, and rollout.
Read on oxagile.comHow Much Does It Cost to Build a Custom Payment Gateway?
What actually drives the cost of building a custom payment gateway: scope, compliance, integrations, and the build-versus-buy calculus.
Read on oxagile.comReading is one thing.
Building it is another.
If one of these describes a problem you are carrying, the engineers who wrote it will take the call.