Banks, lenders and fintech integration services teams connect banking APIs, payment gateways, KYC/AML workflows, and open banking protocols into one reliable, secure architecture – without the overhead of maintaining fragile point-to-point connections.
Every new provider means another custom connection to build and maintain, turning the codebase into brittle glue code.
Transactions, balances, and KYC statuses fall out of sync across providers, requiring manual intervention to catch discrepancies.
Adding a new payment rail or identity verification vendor takes months of engineering time instead of days through a unified gateway.
Ad-hoc API connections create unmonitored attack surfaces and make PCI DSS, SOC 2, and GLBA audit compliance a nightmare.
Fintech Integration Services
Our fintech integration services cover the complete financial technology stack – from legacy core banking to modern open banking and embedded finance APIs.
Connect to core banking platforms like Temenos, Mambu, and Finastra via REST and SOAP APIs, enabling real-time account balances, fund transfers, and ledger updates without destabilizing core systems.
Integrate payment gateways – Stripe, PayPal, Adyen, ACH, and SEPA – with automatic routing, multi-currency support, fee optimization, and resilient webhook-driven transaction lifecycle management.
Implement open banking protocols (OFX, PSD2/Open Banking UK, Plaid, MX) to securely access consumer financial data, bank feeds, and account aggregation services with granular consent management.
Integrate automated identity verification, document validation, and sanctions screening (Onfido, Persona, Trulioo, Jumio) into onboarding flows with real-time risk scoring and automated compliance logging.
Enable non-financial platforms to offer lending, bank accounts, and card issuing through BaaS (Banking-as-a-Service) providers like Unit, Treasury Prime, and Marqeta via modular, white-label API layers.
Wrap legacy banking software in modern API abstractions, creating microservices-based middleware that allows modern frontends and third-party tools to interact with legacy backends safely.
Core Features of Fintech Integration Solutions
Every fintech platform integration services project ends up needing some version of these six pieces – the mix depends on how many providers you’re already running.
Single abstracted endpoint layer so your core application interacts with one unified data format, regardless of how many payment or banking providers sit behind it. Business result: swapping or adding providers requires zero frontend changes.
Webhook-driven architecture and polling workers ensure account balances and transaction states synchronize across internal databases and external providers with sub-second latency. Business result: elimination of double-spend and balance discrepancy errors.
Multi-vendor fallback routing for identity checks and sanctions lists, automatically escalating flagged cases to human review queues. Business result: onboarding pass rates increase while maintaining 100% regulatory compliance.
Smart routing between multiple payment processors based on cost, geographic region, and provider availability, with automatic failover on gateway downtime. Business result: lower transaction fees and near-zero checkout drop-off due to processor outages.
Automated end-of-day reconciliation engines that match ledger records against external bank and processor feeds, isolating mismatched transactions for rapid resolution. Business result: manual reconciliation workload reduced by 90%+.
Immutable, tamper-evident audit logs of every API call, payload hash, and data transformation, meeting PCI DSS, SOC 2 Type II, and GLBA standards out of the box. Business result: painless audits and instant regulatory compliance reporting.
From emerging fintech startups to established commercial lenders, we build integration infrastructure that handles financial data safely and reliably.
Connecting legacy core systems with modern digital banking apps, third-party payment rails, and open banking protocols without disrupting daily operations.
Integrating credit scoring, automated underwriting APIs, loan servicing systems, and real-time payment rails to accelerate decision-to-fund cycles.
Building end-to-end integration architecture from scratch: connecting BaaS providers, payment rails, KYC vendors, and cloud ledgers for rapid time-to-market.
Embedding lending, bank accounts, and card issuing into existing non-financial software products via secure, developer-friendly APIs.
Integrating market data feeds, brokerage APIs, custodian integrations, and automated portfolio rebalancing tools with high-throughput data pipelines.
Connecting premium payment processors, claims automation systems, policy administration engines, and carrier APIs for seamless customer journeys.
Custom Fintech Integration vs Off-the-Shelf Middleware
Pre-built middleware platforms claim to solve fintech integration overnight, but their standardized models fall apart when faced with complex reconciliation and custom business logic. Here is how custom fintech integration compares:
Forced into the vendor’s rigid canonical schema
Designed 100% around your proprietary data model
Basic status matching; complex logic requires brittle workarounds
Custom automated reconciliation pipelines with edge-case handling
Recurring monthly platform fees scaling with volume; locked in
Zero platform licensing fees; 100% code ownership
Shared multi-tenant infrastructure; compliance depends on vendor
Dedicated infrastructure in your cloud; direct SOC 2 / PCI DSS audit trail
Extra network hops through middleware proxy servers
Direct, optimized API connections engineered for sub-second responses
Limited to pre-built marketplace connectors; unsupported APIs blocked
Integration with any REST, SOAP, ISO 20022, or custom proprietary API
Let’s build a unified integration layer that scales with your transaction volume.
Book a callDevelopment Process
Here’s how a typical fintech integration services project runs, start to finish:
We map all upstream and downstream APIs, payload formats, authentication schemes, and compliance constraints before writing code.
We design a decoupled gateway layer with message queuing, rate-limiting, error retries, and data encryption architecture.
Engineers build the connectors, token management, mutual TLS, HMAC authentication, and payload transformation pipelines.
Development runs in 2-week sprints with regular sandbox demos, so you test real transaction flows against mock and sandbox environments early.
Every flow undergoes negative testing, network failure simulation, reconciliation audit verification, and penetration testing.
Cutover planning, canary deployments, 24/7 go-live monitoring, and continuous post-launch support as provider APIs evolve.
The stack behind our fintech integration services is chosen for reliability under transaction load first, everything else second.
Every project run by our fintech api integration company team draws from this same stack, adjusted to the providers you’re already committed to.
Let’s talk!
Node.js, Python, Java, .NET
AWS, Google Cloud, Azure
Temenos, Mambu, Finastra APIs
Plaid, Stripe, ACH/Zelle, SWIFT
PostgreSQL, Redis
PCI DSS, SOC 2, OAuth 2.0, TLS 1.3
Let’s talk!
Case Study: Ply
Client: Ply – a procurement platform for MEP contractors.
Challenge: MEP contractors were managing material procurement, supplier requests and payments across disconnected tools, with no unified view of project costs or approvals.
Solution: Dotcode built Ply’s procurement and payment infrastructure integrated with third-party fintech APIs – Plaid, Railz, Lendflow and Stripe – so material requests, supplier bids and payments run through one connected flow instead of separate systems.
Result: Ply’s team gets a live view of project material costs, savings and open requests in one dashboard, with financing and payment data flowing directly from the integrated fintech providers instead of manual entry.
Fintech integration built around your exact data model and provider stack – not generic middleware.
PCI DSS and SOC 2 compliance built into the architecture from day one – not retrofitted before an audit.
Post-payment model – no upfront financial risk. You pay for delivered, tested software.
100% code and data ownership from day one. No vendor lock-in.
Full-cycle delivery: discovery, architecture, integration development, QA, compliance review, launch, post-launch support.
It’s connecting your product to the banking, payment, identity and data providers it depends on, through one architecture instead of separate one-off connections. Fintech integration services typically cover core banking APIs, payment gateways, KYC/AML and open banking data. Most fintech integration solutions combine several of these, depending on which providers your product already relies on.
Core banking (Temenos, Mambu, Finastra), payment gateways (Stripe, Plaid, ACH, SWIFT), and identity/KYC providers for onboarding and sanctions screening. Our fintech api integration services aren’t locked to a fixed provider list – banking api integration services get scoped around whatever your product already connects to, or plans to.
A single provider integration – one payment gateway, for example – can take a few weeks. Full custom fintech integration across banking, payments and KYC runs longer. Most fintech system integration services projects get a real timeline only after mapping your exact provider list and data model.
Cost depends on how many providers you’re connecting and how complex the reconciliation logic needs to be. Fintech integration services for a single gateway cost far less than a full multi-provider gateway layer. If you’d rather talk it through first, that’s exactly what our fintech integration consulting sessions are for.
In most cases, yes. Our core banking integration services cover the major platforms – Temenos, Mambu, Finastra – plus custom or regional providers when needed. If your provider isn’t on our standard list, fintech platform integration services still apply; it just means a discovery call to confirm what their API actually supports.
Yes. Every project our fintech integration company delivers builds PCI DSS and SOC 2 requirements into the architecture from the start – encryption, access controls and audit logging aren’t a separate phase. As a financial services integration company, that’s the baseline we design to, not an upsell.
Yes. Our kyc aml integration services cover identity verification, document checks and sanctions screening, and our open banking integration services handle account aggregation and financial data sharing across the providers your users actually bank with.
Let’s build a secure, scalable integration layer that fits how your fintech platform operates. Contact us or get a free estimate today.