Open Banking API Development
Build secure, compliant, and scalable banking API platforms engineered for the modern fintech ecosystem.
Why Financial Institutions Need Robust Open Banking Infrastructure
Financial institutions face intense pressure to modernize legacy cores and share data securely. Regulatory frameworks like PSD2 and market-driven standards such as FDX (Financial Data Exchange) demand interoperability. Yet, connecting monolithic banking systems with modern third-party applications presents significant technical hurdles.
Security risks and data privacy concerns often slow down open banking development. Fintechs and banks require engineering partners who understand how to expose financial data APIs without compromising integrity or compliance.
Our Open Banking API Approach
Unosquare approaches API strategy with a security-first mindset. We design middleware and API layers that facilitate seamless communication between legacy infrastructure and modern fintech applications. Our engineering services focus on creating scalable architectures that handle high transaction volumes while adhering to strict financial protocols.
We utilize industry-standard protocols like OAuth 2.0 and OIDC (OpenID Connect) to ensure secure authentication and authorization. By treating APIs as products, we ensure they are documented, versioned, and maintained to support your internal developers and external partners effectively.
What We Deliver
Secure API Gateways
Implementation of robust gateways (Apigee, Kong, AWS) to manage traffic, enforce security policies, and monitor usage analytics across your banking API platforms.
Legacy Core Integration
Development of wrappers and adapters that expose mainframes and legacy databases as modern RESTful or GraphQL endpoints.
Financial Data APIs
Construction of compliant endpoints for account aggregation, transaction history, and payment initiation services (PIS).
Developer Portals
Creation of self-service portals with sandbox environments, allowing third-party providers to test and integrate faster.
Microservices Migration
Decomposing monolithic applications into independent microservices to improve agility and scalability in financial data processing.
Financial Services Compliance & Security Standards
In the financial sector, trust is the currency. Our engineers operate within strict regulatory boundaries to ensure your software withstands audits and penetration testing.
- FAPI (Financial-grade API): Implementing high-security profiles for OAuth 2.0 to protect high-value data.
- PCI-DSS: Ensuring all payment processing integrations adhere to payment card industry data security standards.
- SOC2 & ISO 27001: Maintaining organizational security controls that align with your vendor risk management requirements.
- GDPR/CCPA: Architecting data flows that respect consumer privacy and right-to-be-forgotten requests.
Flexible Partnership Models
We adapt our engagement style to fit your organizational maturity and project velocity.
Staff Augmentation
Inject specific expertise into your existing teams. Perfect for when you need senior engineers with knowledge of financial data APIs to close skill gaps immediately.
Dedicated Teams
A self-contained squad including QA, Scrum Masters, and Developers that integrates with your internal processes to build long-term open banking solutions.
Project Outcomes
We take ownership of the delivery pipeline, building your API strategy from discovery to deployment with defined milestones.
Why Fintech Leaders Choose Unosquare
Learn more about Unosquare and our commitment to engineering excellence.
- Domain Expertise: We do not learn on your dime. Our teams possess deep experience in banking, payments, and insurance verticals.
- Nearshore Alignment: Operating from Mexico, Colombia, and Bolivia, we work in US time zones. This facilitates real-time collaboration, essential for complex API integrations.
- 98% Client Retention: Our consistency in delivery builds long-term trust with enterprise clients.
- Security DNA: Compliance is integrated into our coding standards, not applied as a patch at the end.
Frequently Asked Questions
How do you ensure security in open banking development?
We utilize Financial-grade API (FAPI) security profiles, mutual TLS (mTLS), and strict OAuth 2.0 flows. Every line of code undergoes peer review and automated security scanning to identify vulnerabilities before deployment.
Can you integrate APIs with our legacy mainframe?
Yes. This is a core competency. We build middleware layers or “anti-corruption layers” that translate modern API requests into formats your legacy core can understand (such as ISO 8583 or SOAP), protecting the core while exposing modern REST/GraphQL endpoints.
What is your experience with FDX standards?
We stay current with Financial Data Exchange (FDX) specifications to ensure your APIs are interoperable within the North American market ecosystem, facilitating easier data sharing with aggregators and fintech apps.
How quickly can we scale a team?
With a talent pool of over 1,000 professionals, we can typically deploy engineers within 2-4 weeks, significantly faster than traditional hiring cycles.
Ready to Transform Your Banking Operations?
Let’s discuss how we can help with your open banking api strategy and implementation.