API Development built for Fintech companies
What is API Development?
We design APIs that third-party developers and internal teams actually enjoy integrating with. For Fintech companies, this means navigating PCI DSS, PSD2 while shipping fast.
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
Software that moves and manages money must be fast, auditable and bulletproof under regulatory scrutiny.
From Kathmandu, our team delivers API Development for Fintech businesses across with real timezone overlap.
Stop guessing on API Development — let's build a real plan together
Book a free 30-minute discovery callWhy Fintech teams in outgrow their current API Development setup
- 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 GarudLabs approaches API Development for Fintech companies in
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
$25,000 - $90,000
API Development engagements in this combination typically need to account for:
- PCI DSS
- PSD2
- SOX
- GDPR
- AML/KYC regulations
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 studyTalk to our Fintech API Development specialists this week
Get a free project cost estimateFrequently 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.
A typical api development engagement includes restful or graphql api design, along with the other deliverables outlined in our proposal, such as documentation and a post-launch support window. The exact scope is tailored to your project during discovery.
Most clients come to us for api development because of undocumented apis slowing partner integrations, among other related challenges. We start every engagement by mapping your specific pain points before writing a single line of code.
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.