Fintech · Sydney

Fintech Software Development Company in Sydney, built to ship.

Money software fails loudly. A single mishandled transaction or a KYC gap can stall an entire neobank, so we treat payment, banking, and trading products as systems where correctness and traceability matter more than speed alone. As a build partner to payment companies, neobanks, and financial startups, our team ships PCI DSS-compliant gateways, digital wallets, and KYC and AML workflows with fraud detection wired into every release. The records hold up under scrutiny. Sydney (AEST) is 4.5 hours ahead of India (IST), so your morning overlaps our afternoon and leaves a real four to five hour daily window for live calls, reviews and sign-off before we carry the build forward.

Rated 4.9 stars across 24+ client projectsYou own 100% of the code and IP. NDA on request.

Sydney market

Sydney is Australia's largest startup ecosystem and accounted for roughly 46 percent of all national startup funding in 2025, anchored by a fintech sector that ranks among the world's top ten. With global players like Google, Microsoft and AWS expanding local cloud and data infrastructure, demand for custom software, APIs and mobile apps keeps climbing faster than local hiring can fill it. Geminate Solutions partners with Sydney startups and scale-ups to build and ship product without waiting on a tight talent market.

Local signal: Sydney is Australia's largest startup ecosystem and accounted for around 46 percent of all national startup funding in 2025, with the country raising 5.4 billion AUD across 390 deals that year.

Fintech and financial servicesSaaS and B2B softwareE-commerce and retail techCloud and data infrastructureProptech and insurtech

4.9★

Client rating across 24+ projects

250K+

daily active users on apps we built

10M+

requests per minute handled

50+

products shipped worldwide

The problem

The ledger and the bank statement disagree, and nobody can say why.

Money systems fail quietly. A retried webhook books a payment twice, a timeout leaves a transfer in a state that is neither sent nor failed, and a rounding rule differs by one currency. None of it throws an error. It shows up days later as a reconciliation gap that somebody has to explain to an auditor.

Every hour spent reconciling by hand is an hour not spent shipping, and the gap grows faster than the team does.

What we build

Fintech Software Development for Sydney teams, end to end

PCI DSS-compliant payment gateways with multi-currency support and automated reconciliation

Digital banking and wallet apps for account management, transfers, and bill payments

KYC and AML verification flows using providers such as Onfido and Jumio with sanctions screening

Real-time trading interfaces and portfolio dashboards with regulatory reporting

Fraud detection and transaction monitoring with anomaly alerts

Integrations with payment processors including Stripe and Razorpay

Your time zone

Sydney (AEST) is 4.5 hours ahead of India (IST), so your morning overlaps our afternoon and leaves a real four to five hour daily window for live calls, reviews and sign-off before we carry the build forward.

Your IP, your code

Your IP is contractually yours from the first commit, we work under NDA, and our English-fluent team is used to operating as the remote product arm for Sydney companies that have never offshored before.

Priced in AUD

Transparent, milestone-based, scoped on a free call. No hidden costs and no lock-in.

Sydney specifics

What changes when this is built for Sydney

Australian fintech works under ASIC licensing and the Consumer Data Right, which is Australia's open banking regime and differs enough from the UK model that a European implementation does not port. The New Payments Platform enables real-time payment initiation, which changes the settlement assumptions in the ledger.

Fintech

The decisions fintech software development actually turns on

Systems where the ledger has to be right, not eventually right.

Money is not a float and a balance is not a column

Amounts are integers in minor units, and a balance is derived from an append-only ledger rather than stored and updated. Mutating a balance directly is the bug that produces money from nowhere under concurrency, and it is very hard to find afterwards because the audit trail is the thing you skipped.

Reconciliation is a daily product feature

Your ledger and the processor's settlement file will disagree, and the disagreement is normal: timing, fees, reversals, currency rounding. What matters is that a person can see the difference each morning and resolve it, which means reconciliation is a screen someone uses, not a script nobody runs.

Idempotency at every money-moving boundary

Networks retry. Users double-tap. Without an idempotency key on the payment intent, one intent becomes two charges, and the customer finds out before you do. Every write that moves value needs a key and a stored result for that key.

KYC and AML shape the data model, not just the signup flow

Verification state, document expiry, sanctions screening outcome and the reason for a decision all have to be modelled and retained, because a regulator will ask why a specific customer was approved in a specific month.

Building in Sydney

What is actually different about fintech software development for a Sydney client

Working overlap

3.5 hours a day

Four and a half hours ahead of Surat, five and a half during Australian daylight saving. Their afternoon is our morning, so the shared window is roughly 10:00 to 13:30 IST. Australian teams tend to use that overlap for decisions and leave the build to run unattended, which suits the work.

The law that applies

the Privacy Act 1988 and the Australian Privacy Principles

APP 8 makes the Australian entity accountable for what an overseas recipient does with personal information, which means our handling becomes their liability. That is worth naming in the contract rather than leaving implied. The Notifiable Data Breaches scheme sets the disclosure clock.

How buying works here

Australian buyers are unusually direct about budget and unusually intolerant of scope theatre. A proposal that admits what it does not cover lands better here than one that claims everything.

Procurement

Straightforward and contract-led. Public sector work brings ISM and IRAP considerations that private work does not.

Payments

PayID and the New Payments Platform have changed what Australian users expect from account-to-account transfer, and BPAY still carries meaningful bill-payment volume. Card surcharging is legal and disclosed, which affects how the checkout presents totals.

Compliance in Australia

How does Fintech Software Development stay compliant with Australian Privacy Act / APPs in Sydney?

Sydney companies build under the Australian Privacy Act 1988 and its 13 Australian Privacy Principles, overseen by the Office of the Australian Information Commissioner (OAIC). We design every fintech engagement to respect those rules from day one, not as a checklist bolted on at the end. The Notifiable Data Breaches scheme means a serious breach must be reported, so we build logging, encryption, and breach-response hooks in from the start.

Who regulates you

the Office of the Australian Information Commissioner (OAIC). recent Privacy Act reforms tighten rules on consent and overseas disclosure, which we factor into data flows and third-party services.

Where your data lives

You pick the hosting region. When residency rules or a Australia contract require it, we deploy inside your jurisdiction and you hold the cloud accounts.

What you own

100% of the source code and IP, transferred under contract, with an NDA and a data processing agreement signed before anything is shared.

Proof we can do this at scale: the products we have shipped run at 250K+ daily active users and have handled 10M+ requests per minute, across 50+ products rated 4.9 stars over 24+ client projects. Security and data handling are part of how we build, not an afterthought.

FAQ

Fintech Software Development in Sydney, answered

Can you build PCI DSS-compliant payment systems?

Tokenization, encryption, secure key management, and full transaction logging are the PCI DSS controls we apply across the payment flow. Our team integrates established processors such as Stripe and Razorpay so card data is handled inside a compliant boundary and never lands somewhere it should not.

Do you handle KYC and AML in fintech software development?

Onboarding is where KYC lives, so we build verification straight into it using services like Onfido and Jumio, then layer AML screening against standard sanctions databases. The workflows produce the records financial regulators expect to see.

How do you secure transactions and financial data?

Every transaction is encrypted, authenticated, and recorded. We use AES-256 for data at rest and TLS 1.3 in transit, scope each user to the permissions their role needs, and add real-time fraud monitoring so anomalies surface as they happen. The infrastructure is built to clear a SOC 2 assessment.

What does a normal working day look like across Sydney and India hours?

Sydney runs 4.5 hours ahead of our India team, so we hold live standups and demos during your morning, which is our afternoon, and use the rest of the day for focused development. The overlap is partial but reliable, so you get same-day responses on anything that needs a decision.

Does offshore development with Geminate Solutions work out cheaper than a Sydney agency?

Sydney's developer market is competitive and expensive, so an offshore product partner typically lowers your build cost while keeping quality high. We size the exact cost on a discovery call against your scope and milestones instead of publishing a fixed figure.

How do you handle Australian Privacy Act / APPs and data protection for Sydney clients?

Sydney businesses fall under the Australian Privacy Act 1988 and its 13 Australian Privacy Principles, overseen by the Office of the Australian Information Commissioner (OAIC). The Notifiable Data Breaches scheme means a serious breach must be reported, so we build logging, encryption, and breach-response hooks in from the start. Before any data is shared we sign an NDA and a data processing agreement, and recent Privacy Act reforms tighten rules on consent and overseas disclosure, which we factor into data flows and third-party services.

Where will our data and code be hosted if we build with you from Sydney?

You choose the region. We default to a cloud setup that satisfies Australian Privacy Act / APPs obligations, and when residency rules or a Australia contract require it, we host inside your jurisdiction. You keep full ownership of the source code, the data, and the infrastructure accounts at all times.

How much does Fintech Software Development cost in Sydney?

Every fintech project is scoped on a free call rather than sold as a fixed package, and most engagements start with a paid pilot sprint so you see the work before you commit. You get a clear number in AUD before anything starts.

Do we own the code?

Yes, completely. The code, the project, and the content are handed to you. You hold the keys, not us. We sign an NDA before you share anything.

How long does it take?

Most builds go live in two to four weeks. Larger products with a custom backend or migration take longer, and you get a firm timeline before any work begins.

Start in Sydney

Get a free project estimate

Tell us what you want to build. A senior engineer sends a clear scope and estimate within 24 hours. No pitch, no obligation.

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