System integrations for the
financial industry
We have extensive experience integrating numerous systems within service-oriented architectures. We’ve connected a wide range of systems and design solutions composed of small modules that communicate with each other.
Service-Oriented Architecture (SOA/Microservices)
We don’t believe in big monoliths. We prefer small, specialized modules that communicate via well-defined APIs.
🧩 Many small modules
Instead of one big system, we build multiple small, independent modules. Each owns a specific domain (counterparties, documents, rules, notifications).
🔌 API-based communication
Modules talk over REST APIs, message queues, or other mechanisms. That keeps them independent and easily replaceable.
⚡ Easy integrations
New external system? We add an integration adapter without touching core business logic. Switching a vendor? Replace the adapter – everything else stays intact.
How do we integrate systems?
We’ve worked with a wide range of integration technologies and pick the best fit for each case.
REST APIs
The most common integration approach in modern systems – lightweight, fast, and well documented.
Real-time integrations
Data synchronization
Expose functionality
SOAP / Web Services
Older, but still widespread in finance and banking. Strong typing, XML Schema, WSDL.
Bank integrations
Legacy systems
Strict contracts (XSD)
Message queues
Asynchronous system-to-system communication. Delivery guarantees, retry mechanisms, load balancing.
Long-running processes
Batch integrations
Event-driven architecture
ESB / Service Bus
Enterprise Service Bus – a central integration backbone. Routing, transformations, orchestration.
Many systems
Centralized management
Data transformations
Database procedures
Direct database access via stored procedures or views.
Legacy without APIs
Bulk operations
Reporting systems
Files (CSV, XML, JSON)
File exchange via SFTP, FTP, or shared folders.
Batch imports/exports
Systems without APIs
External partners
Which systems do we integrate with?
We offer ready-made integration adapters for the most popular systems in financial services.
🔍 Credit information bureaus
- • BIK (Credit Information Bureau)
- • BIG InfoMonitor
- • KRD (National Debt Register)
- • ERIF
Real-time creditworthiness checks
📋 Public registers
- • KRS (National Court Register)
- • CEIDG
- • CEPiK (Vehicle Registry)
- • REGON, GUS
Auto-filling counterparty data, vehicle verification
🛡️ Insurers
- •PZU
- •Warta
- •Ergo Hestia
- •Generali, Allianz, Link4
Premium calculations, policy issuance, insurance financing
💼 Accounting systems
- •SAP
- •Microsoft Dynamics
- •Symfonia
- •Comarch ERP, Sage, Oracle Financials
Automatic posting of transactions, counterparty sync
✍️ E-signatures
- •Autenti
- •mSign (mBank)
- •PekaoPay
- •DocuSign, Adobe Sign
Electronic contract signing to speed up processes
💳 Payment systems
- •PayU
- •Przelewy24
- •Tpay
- •PayPal, Blue Media
Online payments, installment deposits, prepayments
Other systems
CRM & Marketing
- • Salesforce, HubSpot
- • MailChimp, SendGrid
Communication
- • SMS (Twilio, SMSAPI)
- • Push notifications
Cloud & HR
- • Azure, AWS S3, Google Drive
- • SAP SuccessFactors, Workday
Need an integration that’s not on the list?
We build custom integrations with any system that exposes an API, database, or other data exchange mechanism.
How we build custom integrations
Analysis
- • Understand source and target systems
- • Review the API / protocol / data format
- • Define mappings and transformations
- • Identify edge cases and error handling
Design
- • Integration adapter architecture
- • Technology choice (REST, SOAP, queues, files)
- • Retry and logging design
- • Security (authentication, encryption)
Implementation
- • Adapter code
- • Unit tests and integration tests
- • Technical documentation
- • Deploy to the test environment
Testing & Go-Live
- • Integration tests with real data
- • Performance testing
- • UAT with business stakeholders
- • Production deployment and monitoring
Real-world integration cases
Integration with BIK and a multi-insurer broker
Challenge:
A leasing platform had to check customers in BIK and automatically fetch quotes from five insurers.
Solution:
- • REST API with BIK (real time)
- • SOAP integrations with five insurers
- • Offer comparison module
- • Automatic policy issuance
Result: -70% processing time
Leasing front office integrated with back office
Challenge:
The company used a front office for sales and a back office for contract settlement. Synchronization was needed.
Solution:
- • Event-driven architecture (RabbitMQ)
- • Event emitted on contract signing
- • Adapter consumes the event
- • Sync of installments, invoices, and payments
Result: Real-time synchronization
Broker portal with a legacy system
Challenge:
A portal for 200+ brokers had to integrate with a legacy system without an API.
Solution:
- • Database stored procedures
- • Nightly batch synchronization
- • Real-time notifications (RabbitMQ)
Result: Real-time portal for users
How do we secure integrations?
🔒 Authentication & authorization
OAuth 2.0, JWT tokens, API keys, and mutual TLS – depending on requirements.
🔐 Encryption in transit
TLS 1.2+ for all connections. Never plaintext.
🛡️ Encryption at rest
Sensitive data (PII, financial data) is encrypted in the database.
📝 Audit logs
Full logging of all API calls: who, when, what, and the outcome.
⚠️ Error handling
Retry mechanisms, circuit breakers, and graceful degradation.
🔍 Monitoring & alerting
Real-time integration monitoring with alerts when something breaks.
What sets us apart?
✅ Experience across technologies
REST, SOAP, queues, stored procedures, files – we choose the best fit for the use case.
✅ Service-oriented architecture
Small modules, well-defined APIs, and easy component swaps.
✅ Financial-industry expertise
We understand BIK, BIG, KRD, insurers, and accounting systems.
✅ Ready-made adapters
A library of prebuilt integrations with popular systems.
✅ Enterprise-grade security
TLS, OAuth, encryption, audit logs, meeting the highest standards.
✅ Monitoring & support
Real-time monitoring, alerts, and ongoing technical assistance.
Need to connect your systems?
Get in touch–we’ll review your landscape, suggest the best integration approach, and estimate time and cost.
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