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Fintech Software Development

We design and build secure payment, banking and investment software, from first prototype to production, with the founders writing the code.

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What you get with Authect's fintech software development

Financial products live or die on trust, accuracy and uptime. Authect builds the software behind them: payment flows, banking apps, lending platforms and the internal tools that keep money moving correctly. We work as a small team led by the founders and senior engineers, so the people who scope your product are the people who build it.

Security and compliance are part of the design from day one, not a review at the end. We build with audit trails, strong authentication and encrypted data by default, document decisions as we go, and hand you code and infrastructure you own outright.

What we do

What's included in our fintech software development services

  • Application development

    Web and mobile apps for payments, accounts, onboarding and investing, built around your users' flows and the rules your product has to follow.

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  • Cyber security

  • Data engineering

  • Artificial intelligence

  • Legacy software modernization

Build financial software regulators can trust, with the founders writing it, not a sales team.

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Service benefits

How we help financial products grow

  1. 01

    Launch faster without cutting corners

    We ship a focused first release quickly, with the security, testing and monitoring a financial product needs already in place, so speed never becomes technical debt.

  2. 02

    Protect customers and their money

    Strong authentication, least-privilege access, encryption and fraud checks are designed into every flow, reducing the risk of breaches and account takeover.

  3. 03

    Stay ready for audits

    Clear audit trails, documented decisions and repeatable infrastructure make it easier to answer regulators, partners and due-diligence questions.

  4. 04

    Scale with confidence

    Architectures built for growing transaction volumes, with load testing and observability, so new markets and features don't put stability at risk.

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The fintech solutions we build

Whether you are launching a new financial product or rebuilding a core system, we cover the full journey: discovery, design, engineering, launch and ongoing support, with a founder accountable at every step.

  1. Payment platforms

    Checkout, payouts, wallets and payment orchestration with provider integrations, retries, reconciliation and clear status for every transaction.

  2. Digital banking apps

    Account opening, KYC flows, cards, transfers and statements in mobile and web apps that are simple to use and hard to abuse.

  3. Lending and credit tools

    Loan origination, decision engines, repayment schedules and servicing back-offices that keep every calculation traceable.

  4. Trading and investment platforms

    Portfolio views, order management and real-time market data integrations with the performance and precision traders expect.

  5. Fraud and risk monitoring

    Rules and machine-learning signals that flag suspicious activity in real time, with dashboards and review queues for your risk team.

Our financial domain expertise

Payments

Card and account-to-account payments, payment-provider integrations, refunds, chargebacks and reconciliation, built so that every movement of money can be traced end to end. We design payment flows around the moments that matter to your customers, such as checkout, payouts and failed payments, and handle the details that keep finance teams sane: idempotent requests, retries, webhooks, settlement reports and clear statuses for support.

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Banking

Customer onboarding, accounts, cards and transfers on top of banking-as-a-service providers or your own core, with the security controls banking customers rightly expect. We build identity and KYC journeys that are quick for genuine customers and hard for fraudsters, mobile and web apps for everyday banking, and the back-office tools your operations team needs to review cases, manage limits and answer customers with confidence.

Hands holding a smartphone showing a mobile banking app in a living room
Lending

Applications, credit decisions, repayment plans and collections, with transparent calculations and records that stand up to scrutiny. We connect your product to credit bureaus, open-banking data and identity checks, turn your credit policy into a decision engine your risk team can adjust, and build servicing tools that keep schedules, interest, fees and arrears accurate for the whole life of every loan.

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Wealth and trading

Investment apps, portfolio reporting and trading tools that handle real-time data, precise calculations and clear presentation of risk. We integrate market data feeds and brokerage or custody APIs, design order and portfolio views that stay fast under load, and present performance, fees and holdings in a way that is easy to understand for both experienced investors and people making their first investment.

Two desktop monitors displaying financial price charts beside a keyboard
Insurtech

Quoting, policy administration and claims journeys that connect to underwriting rules and partners, replacing paperwork with clear digital flows. We build customer-facing quote and buy journeys, self-service portals and claims apps that let people submit photos and documents, and the internal tools that help underwriters and claims handlers work through cases quickly, with every decision recorded.

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How we work

Our approach to fintech software development

  1. 01

    Discovery and scoping

    A founder runs the first workshops with you: your product, your customers, the rules that apply and the providers you already use. You get a written scope, an architecture outline and a price, from the people who will build it.

  2. 02

    Design and prototyping

    We map the critical journeys, such as onboarding, payments and disputes, and test clickable prototypes with real users before any code is written, so costly mistakes are caught while they are still cheap to fix.

  3. 03

    Build in short iterations

    Two-week iterations with working software at the end of each one. Security reviews, automated tests and audit logging are part of every iteration, not a phase left for the end.

  4. 04

    Launch and hardening

    We prepare production environments, monitoring and alerting, support load and penetration testing with the partners you choose, and plan a rollout that keeps the risk to customers and their money low.

  5. 05

    Support and growth

    After launch the same team stays with you: fixing issues quickly, keeping dependencies and providers up to date, and building the next features as your product and your customer base grow.

Why develop your fintech software with Authect

  • Founders on every project

    The people who scope your fintech product are the people who design, build and support it. Decisions are made quickly, by engineers who understand both the code and the business behind it.

  • Security and compliance by design

    Threat modelling, encryption, least-privilege access and audit trails are standard in everything we build, and we work alongside your compliance team so regulatory requirements shape the product from the first sprint.

  • You own everything

    Code, designs, documentation and infrastructure live in accounts you control from day one. No lock-in and no black boxes: any engineer can pick up where we left off.

Case studies

Our fintech projects

Fintech software development FAQs

What is fintech software development?

It is the design and engineering of software for financial services: payment systems, banking and investment apps, lending platforms and the internal tools behind them. Compared with other software, it puts extra weight on security, accuracy, auditability and regulatory requirements.

How do you handle security in financial software?

We start with a threat model, then build in strong authentication, least-privilege access, encryption in transit and at rest, input validation and detailed audit logs. Code is reviewed, dependencies are monitored, and infrastructure is defined as code so environments stay consistent.

Can you work within regulatory requirements like PSD2 or PCI DSS?

Yes. We design products to fit the rules that apply to them, for example by keeping card data out of your systems with compliant payment providers, or by using strong customer authentication. We work alongside your compliance team or advisers, who remain responsible for your regulatory position.

Can you integrate with our existing banking or payment providers?

Yes. We regularly work with third-party APIs and can connect your product to payment processors, banking-as-a-service platforms, identity verification and accounting tools, with retries, monitoring and reconciliation around each integration.

How long does it take to build a fintech MVP?

It depends on scope and regulation, but a focused first release usually takes a few months. We agree the smallest version worth launching, then deliver in short iterations so you can test with real users early.

Tell us what you’re building. A founder replies within one working day, and builds it with you.

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