Financial software development
Financial software development company
for regulated money.
TrustChange is an EU-based financial software development company for banks, EMIs, PSPs, VASPs and neobanks. We design and build custom financial software — ledgers, payment rails, custody, screening and reporting — with MiCA, PSD2, AML/Travel Rule and GDPR engineered into every service, not bolted on before an audit.
- EU-based engineers
- MiCA and PSD2-aware design
- GDPR-compliant delivery
- Client-owned source code
Scope
What our financial custom software development covers
Six subsystems that every regulated financial platform depends on. Technical, product, compliance and procurement leads see the same scope: one team, one plan, one line of accountability.
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01
Ledger and treasury
A double-entry ledger holds every movement. Treasury reads one balance, never a reconciled guess.
- Double-entry postings
- Multi-currency accounts
- Cash and position views
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02
Payment and settlement
SEPA, cards and on-chain rails behind one internal contract. Adding a partner stays a config job.
- PSD2-aware routing
- Reconciliation files
- Payout approvals
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03
Custody and key handling
Hot, warm and cold tiers with policy and quorum. Reserves sit behind air-gapped multi-sig.
- MPC / TSS signing
- Written key ceremonies
- Withdrawal policy engine
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04
Onboarding and screening
One identity flow for retail, corporate and counterparty. Vendor swaps stay cheap because the flow is yours.
- KYC and KYB
- Sanctions and PEP checks
- Travel Rule messaging
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05
Risk and controls
Rules, limits and case review inside the product. Alerts land with the context an analyst needs.
- Velocity and volume rules
- Case queue with SLAs
- Four-eyes approvals
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06
Reporting and evidence
One event log feeds finance, risk and the regulator. The same numbers, the same source of truth.
- Warehouse models
- Regulatory extracts
- Immutable audit log
Domains
Financial software solutions development, by domain
Development of financial software fails on the seams between domains. So we scope each domain as a first-class deliverable, then engineer the seams with typed contracts and event flow.
Adjacent detail: payment processing gateway software, wallet and custody engineering, crypto exchange development and on- and off-ramp integration.
| Domain | What we build | Who it serves |
|---|---|---|
| Retail banking | Accounts, cards and payment services on a ledger you own | EMIs, neobanks, licensed banks |
| Digital-asset services | Wallets, custody, trading and settlement infrastructure | VASPs, crypto exchanges, custodians |
| Payments and acquiring | Gateway, routing, tokenised card flow and payouts | PSPs, acquirers, marketplaces |
| Treasury and back-office | Cash, position, fee and reconciliation tooling | Finance, ops and audit teams |
| Compliance and reporting | Screening, monitoring, Travel Rule and regulator packs | MLROs, DPOs, board risk committees |
| Integration and BFF | Adapters to core banking, card networks, chains and vendors | Platform and integration teams |
Delivery process
Five phases, one financial software development team
The sequence does not change with the engagement model. It is what keeps a regulated build predictable, and what a supervisor expects to see when they ask.
- 01
Discovery
2–4 weeks
Target architecture, rail list, control map and a costed delivery plan you can take to the board.
- 02
Architecture
Signed off first
Data model, service boundaries, key handling and failure modes agreed before a service is built.
- 03
Build
Two-week slices
Each release ships with tests, static checks, a dependency scan and a change record.
- 04
Hardening
Before launch
Load tests, failure drills, access review and an evidence pack. Fixes land pre-cutover, not later.
- 05
Run
Ongoing
24/7 support with named engineers. Roadmap work continues beside operations, not instead of it.
Governance
Ownership, evidence and exit — engineered in
Financial software development services outlast one contract, one vendor and often one board. So control, evidence and exit terms are part of the build, not a post-launch negotiation.
For rule-mapping detail see our compliance engineering practice. Delivery patterns and evidence live on how we deliver. Sibling angle: fintech software development company. Related specialised builds: fintech app development company, payment processing software development and payment ledger & reconciliation development.
Engagement models
Four ways to buy custom financial software development
Procurement gets four commercial shapes for the same engineering bench. Scope shifts as you learn — the contract should shift with it, without switching financial software development company mid-programme.
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Fixed-scope build
A defined platform, a fixed price, a dated plan. Best when scope is settled.
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Dedicated team
A standing squad with a lead. Best for long roadmaps and steady releases.
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Staff augmentation
Senior engineers inside your team. Best when you own the plan already.
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CTO advisory
Architecture and hiring guidance. Best before you commit to a build.
Questions
Financial software development: buyer questions
Six answers technical, product, compliance and procurement leads bring to the first call. Bring the rest to the discovery session.
What kind of financial software development company is TrustChange?
TrustChange is an EU-based engineering partner, not a packaged SaaS or a legal-advice firm. Our engineers deliver custom financial software development services for licensed banks, EMIs, PSPs, VASPs and neobanks, and the code, cloud accounts and runbooks ship with your team from day one.
How is a financial software development agency different from a bank tech vendor?
Vendors sell you a product and rent you seats around it. As a financial software development company we design and build the system to your specification, and hand it over as source. You control the roadmap, the release cadence and the exit path, and can hire, fire or extend the engineering bench independently.
Do you replace our core banking or sit beside it?
Most of our financial software development solutions sit beside an existing core: a thin ledger, an event log and a hardened API in front, integrated through adapters we own. Traffic moves across in stages, so a live book keeps trading while the new platform proves itself.
How do you engineer MiCA, PSD2, AML/Travel Rule and GDPR into the build?
Compliance runs beside the code, not after it. Each regulatory obligation maps to a control, a log line and an evidence artefact, and each release ships with the audit trail already assembled. Rule authority stays with your MLRO, DPO and legal advisers — we deliver the software that implements their policy.
Which engagement models do your financial software development consultants offer?
Four. A fixed-scope build for settled scope, a dedicated team for long roadmaps, staff augmentation when you own the plan, and CTO advisory before a build is committed. The same engineering bench sits behind all four contracts, so switching model does not mean switching people mid-programme.
Who owns the intellectual property and the audit evidence?
You do. TrustChange delivers bespoke, client-owned financial software development solutions with contracts assigning IP to you from day one. Repositories, pipelines, cloud accounts and evidence packs stay with your team — there is no white-label licence and no proprietary layer holding your data hostage.
Book a discovery call with a financial software development team
Bring a rough scope, your target licences and the systems you already run. TrustChange comes back with an architecture view, a control map, a risk list and a costed delivery plan. No demo theatre, no boilerplate deck.