Can you build MiCA-aligned infrastructure for a Berlin-based crypto business?

Yes, we design custody, reporting, and governance architecture aligned to the technical expectations emerging under MiCA and BaFin guidance.

Can you help modernize our legacy banking core?

Yes, we specialize in incremental core modernization that avoids a risky big-bang rewrite while meeting German banking supervisory expectations.

Do you build GDPR-aligned data architecture?

Yes, data minimization, encryption, and access-control patterns are built into our architecture by default for platforms handling EU personal data.

Do you work with MuleSoft, Apigee, and WSO2?

Yes, we design, implement, and optimize API management on MuleSoft Anypoint, Apigee, WSO2, and Kong.

Can you build open banking APIs for our institution?

Yes, including account information and payment initiation APIs with compliant consent and authentication flows.

How do you speed up partner API onboarding?

Through self-service developer portals with sandbox environments, clear documentation, and standardized authentication.

Can you modernize our legacy core without a full rewrite?

Yes, we wrap legacy cores with a modern API middleware layer, avoiding the risk and cost of a full core replacement.

API & Platform · Berlin

API Integration & Open Banking Engineering in Berlin

Banks, fintechs, and platform businesses run on APIs — and every unreliable integration becomes a partner escalation. Hurain Technologies designs, builds, and secures API ecosystems, from open banking connectivity to enterprise API management, so your partner integrations are fast to onboard, well-governed, and secure by default. In Berlin, that means building to the technical expectations of the local market.

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Berlin Market Landscape

Why api integration services is critical in Berlin

Berlin hosts one of Europe's largest concentrations of crypto-native founders and Web3 startups, distinct from Frankfurt's traditional banking focus.
Lower operating costs than London or Zurich have made Berlin a preferred base for early-stage blockchain teams serving the broader EU market.
Berlin startups frequently need architecture that satisfies both BaFin's German expectations and broader EU MiCA alignment as they scale across the bloc.

The Challenge

Problems we see teams struggling with

Slow partner and third-party onboarding

Without a proper API gateway and developer portal, every new integration takes weeks of custom engineering.

Inconsistent API governance

Multiple teams shipping APIs without standards creates versioning chaos and security gaps.

Legacy core system bottlenecks

Monolithic cores can't expose modern, well-documented APIs without a middleware layer.

Open banking compliance pressure

PSD2/open banking-style mandates require secure, standards-compliant APIs with strong consent and auth flows.

No visibility into API usage and abuse patterns

Without centralized gateway analytics, teams often don't know which partners are hitting rate limits, which endpoints are being scraped, or where latency is actually coming from.

Breaking changes disrupting live partner integrations

APIs shipped without a versioning strategy force partners into painful, uncoordinated migrations every time the underlying system changes.

Our Approach

How we deliver api integration services in Berlin

API strategy & governance

API design standards, versioning policy, and lifecycle governance so every team ships consistent, secure APIs.

Open banking API development

Account information and payment initiation APIs built to open banking standards with OAuth2/OIDC consent flows.

API gateway & management platforms

Implementation and consulting across MuleSoft, Apigee, WSO2, and Kong for traffic management, throttling, and analytics.

Middleware modernization

Wrapping legacy cores with modern, well-documented REST/GraphQL APIs without a risky core rewrite.

Developer portal & partner onboarding

Self-service developer portals with sandbox environments that cut partner integration time from weeks to days.

API security engineering

OAuth2/OIDC, mutual TLS, rate limiting, and API-specific threat protection against abuse and data exfiltration.

Versioning and deprecation strategy

A formal API lifecycle policy that gives partners predictable migration windows instead of surprise breaking changes.

Technology

Tech stack we work with

API Management

MuleSoft AnypointApigeeWSO2KongAWS API Gateway

Standards

RESTGraphQLOAuth2 / OIDCOpen Banking / PSD2-style standards

Backend

Java (Spring Boot)Node.jsGoKafka event streaming

Security

Mutual TLSAPI threat protectionRate limiting & quota management

FAQ

API Integration Services in Berlin — FAQ

Yes, we run fixed-scope token, exchange, and smart contract engagements sized for startup budgets and timelines.

Live Demos

A selection of platforms we've designed and built

For reference — real, working builds across fintech, compliance, healthcare, and commerce.

nexa-demo-jade.vercel.app

Fintech

Nexa

SaaS-style product dashboard and workflow UI for a fintech platform.

Open live demo

aml-compliance-suite.vercel.app

Compliance

AML Compliance Suite

Anti-money-laundering compliance and case-monitoring suite.

Open live demo

debtmanagement-two.vercel.app

Fintech

Debt Management

Debt management and collections tracking platform.

Open live demo

umarsob.vercel.app

Payments

UMARSOB Data

Android VTU/data-reseller platform with wallet, agent/referral system, and admin panel.

Open live demo

hospitalmangement-bay.vercel.app

Healthcare

Hospital Management

Hospital/clinic management system covering patient records, appointments, staff, and billing.

Open live demo

dmi-chw-app.vercel.app

Healthcare

DMI CHW App

Offline-first Community Health Worker counseling app with a central management platform, built for an NGO client.

Open live demo

homemakers-seven.vercel.app

Operations

Homemakers Pro

Enterprise operations system for a domestic staffing agency covering bookings, staff, and client management.

Open live demo

e-commerce-mu-one-39.vercel.app/nl-NL

E-Commerce

E-Commerce (Multi-Locale)

E-commerce storefront demo with multi-language, locale-based support.

Open live demo

mars-js.vercel.app

Legal

Mars

Legal web application prototype.

Open live demo

Ready to bring api integration & open banking engineering to Berlin?

Book a discovery call and get a scoped technical estimate within 5 business days.

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