Fintech Software Development

Secure, compliant, and scalable financial technology solutions for banks, fintech startups, and financial services across Germany and the EU. We design and build high-performance platforms: payments, lending, scoring, KYC/AML workflows, internal financial systems, and data-driven decision tools — with architecture that passes security review and survives scale.

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Who We Work With

Built for Modern Fintech Teams

We work with companies that need more than a brochure site — they need real financial infrastructure.

Whether you're launching a new product or refactoring a legacy system, we help you build architecture that is secure, auditable, and ready for regulatory scrutiny.

Banks and financial institutions launching new digital products

Fintech startups building payment, lending, or investment platforms

Card issuers, PSPs, and payment orchestration platforms

BNPL, consumer lending, and B2B credit solutions

Scoring, risk, and underwriting teams that need reliable data pipelines

Wealth, brokerage, and investment platforms

Internal teams modernizing legacy core systems with modern APIs

Common Problems

Typical Challenges in Fintech Software Development

Most fintech products struggle not because of ideas, but because of architecture and execution.

Most fintech products struggle not because of ideas, but because of architecture and execution.

  • Legacy core systems with no clean API layer
  • Manual processes around KYC, onboarding, and underwriting
  • Inconsistent data between CRM, core banking, and reporting systems
  • Fragile integrations with payment providers and card processors
  • No clear separation between business rules and infrastructure code
  • Limited observability into transactions, errors, and anomalies
  • Difficulty passing security audits and compliance checks
  • Systems that don't scale when transaction volume spikes

We help teams move from "it works for now" to "this is a reliable financial platform."

Solutions

What We Build for Fintech Teams

H-Studio Fintech Software Development services illustration

We build backend systems for card payments, bank transfers, payouts, and internal wallets:

  • Transaction processing pipelines
  • Idempotent APIs and retry-safe workflows
  • Ledgering and balance management
  • Reconciliation flows and reporting exports

End-to-end flows for lending products:

  • Application and onboarding workflows
  • Scoring and risk rules engines
  • Offer generation and decisioning logic
  • Repayment schedules, penalties, and restructuring logic

We design data flows that your risk and analytics teams can trust:

  • Event-driven architectures for transaction and behavioral data
  • ETL/ELT pipelines into ClickHouse / BigQuery / PostgreSQL
  • Feature stores and scoring inputs for ML models
  • Dashboards for risk, collections, and product performance

We integrate KYC/AML providers and wrap them in clear workflows:

  • KYC verification flows (documents, checks, liveness)
  • Sanctions & PEP screening integrations
  • Suspicious activity monitoring hooks
  • Audit trails, logs, and case-management APIs

We expose your fintech capabilities through stable, secure APIs:

  • REST / GraphQL / gRPC APIs with clear versioning
  • OAuth2 / JWT / Keycloak-based access control
  • Rate limiting, throttling, and abuse protection
  • Partner onboarding flows and developer documentation

We build the internal interfaces your team actually uses:

  • Operator consoles for support and risk teams
  • Back-office tools for adjustments, refunds, overrides
  • Monitoring dashboards for transactions and incidents
  • Role-based access control for sensitive operations
Process

How We Work With Fintech and Financial Services Teams

Step 01

Architecture & Compliance Review

We review existing systems, integrations, and regulatory constraints (PCI-DSS, GDPR, internal policies). You get a clear architecture map and risk/tech debt overview.

Step 02

Product & Data Design

We define domain models, transaction flows, data schemas, and integration points. Business rules are separated from infrastructure so they can evolve safely.

Step 03

Implementation & Integration

We deliver backend services, APIs, data pipelines, and UI components. We integrate with providers (payments, KYC, scoring) and your existing core systems.

Step 04

Hardening, Testing & Observability

Load tests, security checks, logging, metrics, and alerting. We ensure the system behaves predictably under real usage and is ready for incident response.

Step 05

Launch, Handover & Iteration

We help you launch safely, train your team, and continue iterating based on data — not guesses.

Outcomes

What Fintech Teams Typically Achieve

01

Faster time-to-market for new financial products

→ From ideas to production-ready systems without endless rewrites.

02

Systems that pass internal security & compliance reviews

→ Clear architecture, auditable flows, access control, and logging.

03

Stable integrations with payment, KYC, and data providers

→ Fewer incidents, lower operational overhead, and predictable behavior.

04

Cleaner separation of business logic and infrastructure

→ Easier to change pricing, rules, scoring, or risk policies without breaking everything.

05

Better visibility into transactions, risk, and performance

→ Dashboards and monitoring designed for product, risk, and ops teams.

06

Architecture ready for growth and new markets

→ Multi-country, multi-currency, and multi-product expansion becomes a roadmap question — not a rewrite.

Fintech Software Development | Secure Financial Technology Solutions | H-Studio