Garud Labs

API Development for Fintech businesses in United States

What is API Development in United States?

We design APIs that third-party developers and internal teams actually enjoy integrating with. For Fintech companies in United States, this means meeting PCI DSS requirements while maintaining UTC-5 to UTC-10-aligned delivery.

Who needs API Development for Fintech?

  • Meeting evolving compliance requirements across markets
  • Integrating with legacy core banking systems
  • Building real-time fraud detection at scale
  • Undocumented APIs slowing partner integrations
  • No versioning strategy causing breaking changes

Best API Development company in United States

US buyers prioritize speed, communication overlap and proven enterprise security practices over lowest hourly rate. We bring deep knowledge of PCI DSS and PSD2 compliance into every API Development engagement for United States clients.

From Kathmandu, our team delivers API Development for Fintech businesses across United States with real timezone overlap.

Software that moves and manages money must be fast, auditable and bulletproof under regulatory scrutiny.

Bring your API Development idea to a team that ships for Fintech

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What Fintech leaders in United States wish they knew before starting API Development

  • Meeting evolving compliance requirements across markets
  • Integrating with legacy core banking systems
  • Building real-time fraud detection at scale
  • Maintaining uptime during peak transaction volume
  • Balancing UX simplicity with strict KYC/AML flows

How we tailor API Development to Fintech-specific requirements

RESTful or GraphQL API design
OpenAPI/Swagger documentation
Authentication and rate-limiting layer
Webhook and event-driven architecture
Load testing and performance tuning

Core Technology Stack

Node.jsPythonFastAPIGraphQLPostgreSQLRedisDockerKong

Timeline, investment & compliance

Typical timeline

6-12 weeks

Typical investment

$30,000 - $250,000

API Development engagements in this combination typically need to account for:

  • PCI DSS
  • PSD2
  • SOX
  • GDPR
  • AML/KYC regulations
  • SOC 2
  • CCPA
  • HIPAA

Why United States clients choose GarudLabs: The largest software buying market in the world, with deep venture funding and high willingness to pay for quality engineering partners.

Proven Results

"We helped a digital lending platform cut loan approval time from days to minutes while staying fully audit-ready."

Read the full case study

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Frequently Asked Questions

Most API Development engagements take 6-12 weeks, depending on scope and how clear the requirements are upfront. We'll give you a firm timeline estimate after a short discovery call, not a generic range.

API Development projects with us typically range from $15,000 - $90,000, scaled to the complexity of your requirements. We provide a detailed, itemized estimate before any work begins so there are no surprises mid-project.

For api development, we typically work with Node.js, Python, FastAPI, GraphQL, chosen based on your specific scalability and integration requirements. We're not tied to a single stack and will recommend the right tools for your situation rather than our default.

We've delivered multiple fintech projects addressing challenges like meeting evolving compliance requirements across markets. We helped a digital lending platform cut loan approval time from days to minutes while staying fully audit-ready.

For fintech clients, we pay close attention to PCI DSS, PSD2, building these requirements into the architecture from day one rather than retrofitting them later. We'll confirm which specific regulations apply to your business during discovery.

The most common challenges we solve for fintech clients include meeting evolving compliance requirements across markets and integrating with legacy core banking systems. We tailor our discovery process to surface the specific version of these problems your business faces.

Yes, we actively work with clients across United States, including teams in New York, San Francisco, Austin. We structure our working hours to provide meaningful real-time overlap with UTC-5 to UTC-10.

Project budgets for United States-based clients typically range from $30,000 - $250,000, paid in USD or USD depending on your preference. The exact cost depends on project scope, which we'll detail in a proposal after discovery.

Yes, we have experience building to SOC 2, CCPA requirements relevant to United States-based clients. We'll confirm your specific compliance needs during the discovery phase and adjust our development practices accordingly.

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Ready to talk API Development for your Fintech business in United States?

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