Software Development for Finance
We're a fintech developer's fintech developer — senior engineers building secure, compliant financial software for banks, lenders, payment companies, wealth platforms, and trading firms. Built to clear PCI DSS, SOC 2, and KYC/AML from the first commit.
A financial software development company built for FinTech.
Fintech is one of the fastest-growing sectors on earth — pushed forward by data analytics, blockchain, cloud, and AI. The opportunity is enormous, and so is the bar: regulated, security-critical software that can't afford to be wrong.
If you run a finance business today, the wake-up call is simple — adapt to new technology faster than ever, and pick a development partner who understands money, not just code. Off-the-shelf tools force you to jam square pegs into round holes; financial institutions have unique workflows, compliance obligations, and data that demand bespoke financial software.
That's where a dedicated fintech software development company earns its keep. We build custom, best-fit solutions for the way your institution actually operates — turning large volumes of financial data into efficiency, insight, and a defensible position in an increasingly digital financial industry.
What our fintech developers build.
Full-stack financial software across the products that move money — engineered for security, auditability, and scale.
Core Banking & Ledgers
Double-entry ledger systems, account and balance engines, digital banking apps, and core-banking integrations with reconciliation built in.
Payments & Card Issuing
Payment processing, ACH and wire flows, card issuing and acquiring, wallets, and PCI-compliant tokenization across rails and providers.
Lending & Underwriting
Loan origination, automated underwriting and credit decisioning, servicing, and BNPL platforms with risk models baked in.
Wealth & Robo-Advisory
Portfolio management, robo-advisors, expense and budgeting tools, and financial-reporting platforms for advisors and consumers.
Trading & Brokerage
Order management, real-time market data, brokerage and exchange systems, and low-latency pipelines for balances and risk.
RegTech, KYC/AML & Fraud
KYC/AML onboarding, transaction monitoring, fraud detection, and regulatory-reporting automation for audit-ready operations.
Few industries have a higher bar for data security. We build to it.
The financial world's data-security requirements are among the strictest anywhere — and a single lapse can be existential. We design security and compliance into the architecture rather than bolting them on afterward.
That means PCI DSS for card data, SOC 2 controls for operations, and the regimes that apply to your market — KYC/AML, PSD2 and open banking, GLBA, and GDPR/CCPA — backed by tokenization, end-to-end encryption, least-privilege access, immutable audit logs, and segregation of duties.
Review Your Compliance NeedsMoney moves on an auditable, double-entry ledger.
Every transaction balances to zero and is recorded immutably — the foundation of any trustworthy financial system.
// Double-entry transfer: debits must equal credits, alwaysasync function transfer(from: Account, to: Account, amount: Money) { assert(amount > 0 && from.balance >= amount) // no overdraft, no negatives return ledger.atomic(async (tx) => { tx.post({ account: from, debit: amount }) // -X tx.post({ account: to, credit: amount }) // +X tx.requireBalanced() // sum(entries) === 0 await audit.record(tx, { actor, ip, traceId }) // immutable trail })}Atomic, balanced, and audited — the same discipline we apply to payments, lending, and trading flows.
How a fintech build runs.
A disciplined process that respects how regulated, money-handling software has to be delivered.
Discovery
Map the product, the money flows, the regulatory surface, and the integrations — banking cores, payment rails, KYC/AML and data providers.
Architecture
Design for security, auditability, and scale: data model, ledger, threat model, and compliance controls before a line of feature code.
Build
Senior engineers ship in tight iterations with automated tests, code review, and reconciliation built into every money path.
Harden & certify
Security testing, penetration tests, and the evidence trail your PCI DSS, SOC 2, and audit obligations require.
Launch & evolve
Zero-downtime deploys, monitoring of transactions and risk, and a roadmap to keep the platform compliant and competitive.
In-house hire vs. a DEV.co fintech team.
Why most financial-tech firms partner instead of building an engineering org from scratch.
| Hiring in-house | DEV.co fintech team | |
|---|---|---|
| Time to first ship | Months of recruiting | Weeks — team is ready |
| Fintech & compliance depth | Hard to find, harder to keep | Built-in across the team |
| Security / PCI / SOC 2 | You build the practice | Engineered in by default |
| Scaling up or down | Slow, costly headcount | Flex the team to the roadmap |
| Total cost over time | Salaries, benefits, churn | Predictable, project-based |
Compliance & standards we build to.
The frameworks and regulations that govern financial software — handled as first-class requirements.
PCI DSS
Cardholder data tokenized, encrypted, and scoped to shrink your compliance burden.
SOC 2
Operational controls, logging, and evidence trails auditors expect to see.
KYC / AML
Identity verification, sanctions screening, and transaction monitoring.
PSD2 / Open Banking
Secure, standards-based APIs for account access and payment initiation.
GLBA
Safeguards for nonpublic personal information across the stack.
GDPR / CCPA
Privacy-by-design, consent, and data-subject rights handled correctly.
SOX-ready
Controls and audit trails that hold up to financial-reporting scrutiny.
Encryption
End-to-end encryption in transit and at rest, with managed key rotation.
A partner that treats your financial software like its own.
We take pride in developing custom software for financial-services companies — whether you have a specific product in mind or want our team to help shape applications that let you grow and compete.
When you work with us, you get security that counters the threats finance faces, reliability proven through rigorous testing, and maintainable code written to the golden rules so your platform stays nimble and modern for years.
Tell Us About Your ProjectWhat you get with DEV.co.
- Senior financial software developers — no junior hand-offs; the people who design your system build it.
- Security and compliance by default — PCI DSS, SOC 2, and KYC/AML treated as requirements, not afterthoughts.
- Auditable, reconciled money flows — double-entry ledgers and immutable trails on every transaction path.
- Clean integrations — payment, banking, and data providers behind swappable, well-tested APIs.
- Modernization without downtime — incremental migration that keeps you processing the whole time.
- Maximum ROI — a fintech focus that delivers value and return at every step.
Ways to engage.
From a focused discovery to a long-term product partnership.
- Product & money-flow mapping
- Architecture & threat model
- Compliance & integration roadmap
- Effort + cost estimate
- Dedicated senior fintech team
- Secure, compliant build
- Payment & banking integrations
- Audit-ready from launch
- Legacy system modernization
- Zero-downtime migration
- Performance & scale work
- Ongoing compliance support
There are plenty of software development services — but few that live and breathe finance. Our focus on FinTech means you get top value and maximum ROI at every step, on software your customers and regulators can trust.
Fintech development questions.
What does a fintech developer at DEV.co actually build?
How do you handle financial compliance and data security?
Should we build financial software in-house or outsource it?
Can you integrate with banking, payment, and market-data providers?
Do you build with blockchain, AI, and real-time data?
How do you keep a financial platform live while you modernize it?
Let's build your fintech platform.
Tell us about the financial software you need — we'll map a secure, compliant path from idea to launch.