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Fintech software development

Fintech Software Development Services

We design, build and ship production fintech systems end to end — payments, digital banking, lending, trading, cards and compliance. Built for banks, fintechs and platforms handling real money.

For enterprises modernizing, funded startups launching, and teams extending internal engineering capability.

For banksFor fintechsFor platforms
Fintech systems we build · end to end
Experience · apps & portals
Web & mobile banking, onboarding, dashboards
Core · payments & ledger
Payments, wallets, double-entry ledger, cards
Integrations · rails & data
Card networks, ACH/SEPA, open banking, KYC
Platform · security & compliance
Encryption, audit trails, PCI, monitoring
Overview

What fintech development really involves

Fintech software carries a higher bar than most products: money movement must be correct to the cent, systems must be secure and auditable, and the whole thing has to satisfy regulators and payment networks. A missed edge case in a ledger or a compliance gap is not a bug — it is a liability.

As a fintech software development company, we build across the stack: customer-facing apps and onboarding, a correct double-entry ledger and payments core, integrations with card networks, banking rails and open-banking APIs, and the security and compliance controls that keep it all defensible. Whether you are launching a neobank, a payments product, a lending platform or a trading app, we take it from idea to launch.

The problems we solve are concrete: moving money faster and cheaper, reducing fraud and risk, onboarding users without friction, and staying compliant as you scale across markets. We pair careful financial engineering with security and regulatory discipline — so what ships is accurate, safe and ready for audit.

At a glance
Who it’s for
Banks, fintechs and platforms handling payments and money.
Engagement
From-scratch builds, existing-project pickup, or advisory.
Proof
Response
Scoping reply within 2–3 business days.
Talk to our team →
What we deliver

Full-stack fintech capabilities

Eight capabilities that combine into a compliant, production financial system.

Our approach

How we run a fintech engagement

A disciplined path from idea to a launched, compliant product.

01

Discovery & compliance scoping

Requirements, flows and the regulatory and PCI scope up front.

02

Architecture & security design

Ledger, payments and security architecture with threat modelling.

03

Build & integrate

Core, apps and rail integrations built in short, tested cycles.

04

Test & certify

End-to-end testing, reconciliation checks and network certification.

05

Launch & go-live

Controlled rollout, monitoring and runbooks for money-critical systems.

06

Support & scale

Ongoing support, new rails and scaling as volume grows.

Tech stack

Tools & frameworks we use

We pick the stack that fits your regulatory, latency and reliability needs.

Backend & languages
Java / KotlinGoNode.jsPythonPostgreSQL
Payments & rails
StripeAdyenPlaidMarqetaISO 20022ACH / SEPA
Security & compliance
OAuth2 / OIDCHSM / KMSPCI DSS3-D SecureVault
Infra & data
KafkaRedisAWS / GCPKubernetesDatadog
Proof

Fintech systems we’ve shipped

Production financial software — secure, compliant and reconciled.

Regulated stablecoin infrastructurePayments

Issuance and settlement for a regulated stablecoin — mint, burn and redemption under multi-signature authorisation with hardware-backed custody, reserve accounting reconciled against on-chain supply, transfer restrictions and allowlists enforced at contract level, and freeze, seize and recovery controls for regulatory instruction.

Multi-sig
authorisation with hardware-backed custody
Every transfer
sanctions and risk screened
Read case study →
FincorLending

A chain built around a custom security model, with an AI compliance and KYT engine on top — risk scoring and anomaly detection engineered into the platform rather than bolted on from a vendor feed.

Custom
security model at the protocol layer
AI
compliance, KYT and anomaly detection
Read case study →
Why Magnus Mage

Regulated-grade engineering

Money-movement code is unforgiving. We build fintech systems with the correctness, security and audit discipline the domain demands.

We’re the engineering partner enterprises and funded startups pick when execution risk, time to launch, and long-term ownership matter — a single accountable team from architecture through operations.

Talk to our team →
01

Regulated-grade engineering

Correct ledgers, reconciliation and audit trails — built to survive scrutiny.

02

Security & compliance built-in

PCI, KYC/AML and threat modelling from day one, not before launch.

03

Scales with volume

Architectures that stay reliable as transactions and users grow.

04

Full-stack fintech depth

Apps, core, rails and infra — one team that owns the whole system.

FAQ

Fintech development questions

What buyers ask before starting a fintech project.

It depends on scope. A single payment integration is far smaller than a full neobank or lending platform with a ledger, rails and compliance. We scope against your requirements and give a clear range before work starts.

A focused product can ship in a few months through discovery, build, testing, certification and go-live. Complex, multi-rail platforms take longer. We share a realistic timeline during scoping.

Yes. We design to PCI DSS, build KYC/AML and reporting, and scope regulatory requirements early — and we work alongside your compliance and legal teams.

Card networks and processors (Stripe, Adyen, Marqeta), banking rails (ACH, SEPA, ISO 20022) and open banking (Plaid and similar) — chosen for your markets and use case.

A correct double-entry ledger, reconciliation, encryption and key management (HSM/KMS), threat modelling, and full audit trails and monitoring on every money movement.

Yes. You own all source code and IP we build for you, delivered with documentation and a clean handover.

Explore other services

Talk to our team

Tell us what you’re building. We’ll come back within 2–3 business days with a scoping call — straight to our team, no sales runaround.

From-scratch builds, existing-project pickup, or advisory
You own all code and IP
2–3 business day response
Thanks — we’ll be in touch within 2–3 business days.
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