What problems we help to solve


Disconnected systems and data silos

We unify fragmented financial systems into a single, reliable data flow, eliminating silos and ensuring all platforms work seamlessly together.

Manual processes and operational inefficiencies

By automating data exchange and workflows, we reduce manual work, minimize human error, and lower operational costs.

Slow product launches due to complex integrations

Our proven integration frameworks accelerate development, helping you launch new financial products and features faster.

Inconsistent or unreliable data across platforms

We ensure accurate, synchronized data across all systems, so your teams and customers always rely on a single source of truth.

Security and compliance risks in data exchange

We build integrations with security and regulatory requirements in mind, reducing exposure to data breaches and compliance issues.

Poor visibility of real-time business performance

Real-time data synchronization and monitoring give you instant insights into transactions, operations, and system health.

Legacy software modernization services we offer


Whether you need a strategic roadmap, a specific security upgrade, or a full-fledged platform modernization, our company tailors the right engagement model to meet your goals.

API integration & orchestration

Design, build, and manage scalable APIs that enable smooth communication between internal systems and external partners.

Core banking & legacy system integration

Connect modern FinTech solutions with existing banking infrastructure without disrupting ongoing operations.

Payment provider & PSP integrations

Seamless integration with payment gateways, acquirers, and PSPs to support secure and efficient payment flows.

Open Banking & PSD2 connectivity

Enable secure data sharing and third-party access through compliant Open Banking and PSD2 integrations.

CRM, ERP, and FinTEch systems integration

Synchronize customer, transaction, and operational data across CRM, ERP, and financial platforms.

Data synchronization & ETL pipelines

Build reliable ETL processes to move, transform, and synchronize data across systems in real time or batch mode.

Middleware & integration layer development

Create robust middleware layers that decouple systems, improve flexibility, and simplify future integrations.

Event-driven architecture implementation

Implement event-based systems that react instantly to changes, improving scalability and performance.

Integration testing & monitoring setup

Ensure long-term stability with automated testing, monitoring, alerting, and performance optimization.

Who it’s for


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Enterprises managing multiple financial tools and vendors

Large organizations and financial institutions that need secure, scalable integrations across complex financial ecosystems.

Marketplaces & platforms handling multi-party payment flows

Platforms that manage payouts, commissions, and complex transaction logic between multiple parties.

FinTech startups building products on top of complex ecosystems

Fast-growing startups that need reliable integrations to scale, comply with regulations, and reach market quickly.

How it works (Our process)


1
Discovery & architecture
2
Integration design
3
Implementation & testing
4
Ongoing optimization

Discovery & architecture

We analyze your ecosystem, goals, and constraints to design the optimal integration approach and architecture.

Integration design

We define data flows, APIs, security layers, and system interactions to ensure stability and scalability.

Implementation & testing

We build, connect, and validate integrations with a strong focus on reliability, performance, and security.

Ongoing optimization

We monitor, improve, and scale your integrations as your product, traffic, and ecosystem grow.    

Our success in numbers

Genuisee’s versatile experience, gained over more than 8 years, has enabled us to form a team with a proven track record.


Geniusee 195 1 2

20+

Countries

180+

Projects completed

80

NPS score

250+

Industry-specific experts


Why choose Geniusee


✅ FinTech domain expertise across banking, payments, lending, and SaaS

We bring deep hands-on experience across key FinTech verticals, enabling us to design solutions that meet real financial, regulatory, and business needs.

✅ Secure-by-design integrations aligned with industry regulations

Security and compliance are embedded from day one, ensuring every integration meets industry standards and regulatory requirements.

✅ Clear communication and transparency at every stage

We maintain open, honest communication throughout the project, providing full visibility into progress, timelines, and decisions.

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Features & capabilities of our financial services


Secure API gateways

We implement secure, scalable API gateways that control access, manage traffic, enforce authentication, and protect your integrations from unauthorized use and attacks.

Real-time data synchronization

Ensure instant, accurate data exchange across systems so transactions, balances, and business metrics are always up to date.

Event-driven & microservices architecture

Build flexible, loosely coupled systems that react instantly to changes, enabling faster scaling, easier updates, and improved system resilience.

High-availability infrastructure

Design fault-tolerant architectures with redundancy and failover mechanisms to keep your integrations running 24/7 with minimal downtime.

Error handling & retry mechanisms

Automated error detection, retries, and fallback logic ensure data consistency and reliability even when external systems fail.

Monitoring & observability dashboards

Gain full visibility into integration performance with real-time dashboards, alerts, and logs that help detect issues before they impact users.

Role-based access control

Restrict system access based on user roles and responsibilities to enhance security and meet internal governance requirements.

Event-driven architecture implementation

Maintain detailed logs of all data exchanges and system actions to support troubleshooting, audits, and regulatory compliance.

Compliance-ready integration flows

Prebuilt security and compliance patterns ensure your integrations meet financial industry regulations and data protection standards.

Recognition, certifications, and partnership


logo aws

Certified AWS Partner delivering secure, scalable cloud-native solutions.

logo iso

ISO-compliant processes ensuring quality, security, and reliability.

logo plaid

Trusted integration partner for financial data connectivity and open banking.

logo istqb

Team of ISTQB-certified QA engineers for world-class software testing.

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Consistently rated ★5.0 by clients for reliability and delivery excellence.

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Accredited partnership supporting advanced testing and continuous QA automation.

FinTech integration services FAQs


How long does a FinTech integration project take?

A typical FinTech integration project usually ranges from 8–20 weeks, depending on the number of systems involved and regulatory complexity. 

Small integrations like a payment API might take about 2–3 months, while enterprise‑level integrations with multiple banks, data feeds, and compliance layers can extend toward 5 months or more.

Do you work with legacy systems?

Yes, we specialize in integrating modern FinTech solutions with legacy systems, whether it’s a core banking mainframe or custom internal platform. We assess your current architecture, identify risks, and create a modernization roadmap that minimizes disruption to your operations. 

How do you ensure security during integrations?

Security is built into every phase of the integration through industry‑standard controls like ISO‑grade encryption, role‑based access, vulnerability scanning, and penetration testing. We align with compliance frameworks such as ISO 27001 and GDPR and perform continuous audits to make sure data and transactions remain safe.

Can you support ongoing maintenance?

Absolutely, after launch, we offer ongoing support, monitoring, and updates to keep your integrations secure and performing well. Maintenance can include everything from patching security issues to adding new API connections as your business grows.

How much does your FinTech integration services cost?

Costs depend on complexity, scope, and regulatory requirements – smaller integrations like a single payment API typically start around €25,000–€40,000, while full platform integrations can range €80,000–€250,000+. 

For an approximate price without using a calculator, try our Estimator, just multiply your main components (APIs, compliance, frontend, backend) by the number of integrations you need. 

Most clients see the best value when they define key features up front, so the quote reflects real needs instead of surprises down the line.

What are the most popular FinTech integrations in 2026?

In 2026, the most soughtafter integrations include embedded finance capabilities that let non‑financial apps offer payments, lending, or insurance directly inside their UX. 

Open banking and BaaS (Banking‑as‑a‑Service) APIs remain essential for connecting accounts, initiating payments, and accessing financial data securely. 

There’s also strong demand for integrations with real‑time payments, AI‑driven fraud detection, and digital identity verification tools that help deliver seamless and compliant customer experiences.