Crypto payment gateway · engineering partner
Crypto payment gateway development,
engineered as a gateway you own.
TrustChange is a crypto payment gateway development company for EU-facing crypto startups, licensed VASPs, PSPs, EMIs, neobanks and merchants. We build the checkout, router, custody stack, ledger and merchant tooling as bespoke code under your brand — not a SaaS licence with a per-transaction fee. You get a crypto payment gateway your engineers can extend, your ops team can run and your auditor can read.
- EU-based engineers
- PSD2-aware delivery
- MiCA-ready architecture
- GDPR-aware storage
What "crypto payment gateway" means here
A crypto payment gateway that plugs into your rails, not a SaaS you rent
Most searches for a crypto payment gateway provider surface multi-tenant SaaS with fixed features and a per-transaction fee. We work the other way. TrustChange is a crypto payment gateway development partner: your brand, your keys, your ledger, your code. What you buy is engineering, not a subscription — and every new asset, market or PSP you add later stays on your platform.
Deciding whether to buy, build or wrap? Start with CTO advisory. The wider pillar sits on payment gateway engineering.
Subsystems
Three subsystems inside every crypto payment gateway we build
A gateway is not one service. It is a checkout and pay-in path, a custody and payout path, and a merchant surface that must agree on every cent. We build the three together, on one plan, with one team accountable end to end.
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01
Checkout & pay-in
Hosted or embedded checkout that accepts crypto beside card and bank rails. Rate lock, confirmation policy per asset, and a settled cart in one flow.
- Hosted + embedded fields
- Per-asset confirmations
- Rate lock windows
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02
Custody & payout
MPC or HSM signing, hot / warm / cold tiers, allow-lists and quorum for withdrawals. Refunds and chargeback offsets settle through the same ledger.
- MPC / HSM signing
- Withdrawal policy engine
- Refund & offset flows
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03
Merchant tooling
Onboarding, KYB, API keys, webhooks, dashboards and reports. Support stops living in your inbox because the merchant can see what the gateway saw.
- KYB onboarding
- Webhook + retry log
- Settlement reports
Stack
What sits behind our crypto payment gateway development services
Eight layers, one system. Every layer names an owner, a control and a piece of audit evidence — nothing is left implied under the "gateway" label.
Delivery patterns and evidence: how we deliver. Wider platform view: fintech infrastructure.
| Layer | What we build |
|---|---|
| Router & orchestration | One router picks the cheapest working path across card, SEPA and on-chain rails, with per-market fallback rules New rails and PSPs land as adapters, not a fork. |
| Risk & screening | Pre-trade risk, sanctions screening and wallet-risk checks before authorisation or signing Rules run inside the flow; each verdict is stored with the request. |
| Chain coverage | Bitcoin, EVM chains, Solana and other UTXO/account networks with per-asset confirmation policy Confirmation targets are policy, not code — reviewable in the console. |
| Custody | MPC or HSM signing across hot, warm and cold tiers with quorum and allow-lists Keys are generated inside your trust boundary and never leave it. |
| Ledger | Double-entry ledger for fiat and crypto legs, idempotent postings, event-sourced Every posting carries a source id, a rule version and an operator id. |
| Reconciliation | Card acquirer files, PSP webhooks, SEPA statements and on-chain reads matched daily Breaks open cases with owners and SLAs; nothing is retro-edited. |
| Compliance | KYC / KYB, Travel Rule messaging, PSD2-aware fiat flows, GDPR data mapping Evidence is produced as a byproduct, not a separate report run. |
| Runtime & delivery | EU-hosted, CI/CD pipelines, observability, 24/7 on-call Your identity provider, your key custody, your data regions. |
Money path
From quote to settled funds
Every payment in the crypto payment gateway goes through the same gates before a fill is written or a signature is requested. Speed comes from tuning the pipeline, not from skipping a step or trusting the input.
- 01
Quote & lock
Seconds
The router picks a path, locks a rate for a defined window and returns a settled quote to the merchant.
- 02
Authorise & screen
Seconds
Card SCA, sanctions and wallet-risk checks run before capture or signing. Each verdict is stored with the request.
- 03
Capture / sign
Seconds to minutes
Card capture or on-chain signing. Confirmations are counted per the policy set for that asset.
- 04
Ledger & reconcile
Same day / T+1
Postings land in the double-entry ledger. Acquirer files and on-chain reads reconcile against it daily.
- 05
Settle & report
T+1 to T+2
Merchants are paid out on the schedule you set. Reports go to finance and to the auditor bundle.
Delivery
How we deliver crypto payment gateway development services
Five steps, in this order. Regulated payment work runs inside the product backlog — no separate compliance phase bolted on before launch, no big-bang release of an untested crypto gateway.
- 01
Scoping
Weeks 1–2
We map rails, assets, custody model, merchant onboarding and licence context. Output: a scope, a control map and a costed plan.
- 02
Architecture
Weeks 3–4
Topology, router design, key handling, ledger schema and screening flow written down first. Regulatory constraints shape the design, not a later patch.
- 03
Build
Two-week sprints
Checkout, router, custody and merchant tooling ship in slices. Each merge runs tests, static checks and a dependency scan. Nothing lands without a review.
- 04
Hardening
Before launch
Load work, failure drills, replay tests against historical traffic and a third-party pen-test window. Recovery is rehearsed with your staff.
- 05
Launch and run
Cut-over + ongoing
Named engineers on 24/7 cover. Runbooks, dashboards and the audit bundle are handed to your team on day one.
Engagement
Four ways to buy your crypto payment gateway build
Same engineers, same standard. Only the commercial shape changes.
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Fixed-scope build
A defined gateway at a fixed price and date. Best when rails, assets and merchants are settled.
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Dedicated team
A standing squad with a lead. Best for long roadmaps and new rails each quarter.
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Staff augmentation
Senior engineers inside your team. Best when you already own the plan and need gateway depth.
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CTO advisory
Architecture and buy-vs-build review before you commit. Best at the design stage.
Questions
FAQ: crypto payment gateway development
Six answers up front on scope, ownership, rails, custody, compliance and support. Bring the rest to the call.
Related specialised builds: payment processing software development, payment ledger & reconciliation development and crypto off-ramp integration.
What do you mean by crypto payment gateway development, exactly?
We engineer a bespoke, client-owned crypto payment gateway for you — checkout, router, custody stack, ledger, reconciliation and merchant tooling — as source code in your repositories, with the IP assigned to you. There is no per-transaction fee, no shared multi-tenant backend and no vendor gate between you and your merchants or your customers.
How is your crypto payment gateway development company different from an off-the-shelf provider?
Off-the-shelf crypto payment gateways are usually multi-tenant SaaS with a fixed feature set and a licence fee. TrustChange is a crypto payment gateway development company that engineers a system you own end to end. The trade-off is honest: a bespoke build takes longer up front, but you keep every line of code, every key and every control decision, and you avoid the roadmap lock-in and per-transaction cost of a packaged crypto payment gateway.
Which assets, chains and fiat rails do your crypto payment gateway development services cover?
Reference builds cover Bitcoin, EVM chains, Solana and other account or UTXO networks alongside card acquiring, SEPA / SEPA Instant and open-banking rails. Confirmation policy is per-asset, quote-and-lock windows are configurable, and both fiat and crypto legs post into the same double-entry ledger — so finance reads one report and reconciles against one source of truth.
How do custody, signing and refunds work in the gateway you deliver?
Keys are generated inside your trust boundary and never leave it. Signing runs on MPC (multi-party computation) or an HSM, with hot, warm and cold tiers, per-asset velocity caps, allow-lists and quorum approvals above defined thresholds. Refunds, reversals and chargeback offsets flow through the same ledger and screening pipeline as pay-in — nothing bypasses the controls, and every action writes to a signed, time-ordered audit log.
How are MiCA, PSD2, AML / Travel Rule and GDPR engineered into the gateway?
TrustChange is an engineering partner, not a law firm — your compliance advisers set the policy, we ship the controls and the evidence. That means KYC / KYB flows in merchant and customer onboarding, sanctions and wallet-risk screening before authorisation or signing, Travel Rule data on crypto transfers, PSD2-aware SCA on the fiat side and GDPR-aware storage with data mapping and retention rules. Nothing about licences, opinions or supervisor approvals is claimed on your behalf.
Do you also run the crypto payment gateway after launch, or hand it over?
Both are on the table. Most clients start with named TrustChange engineers on 24/7 cover during the first months while their own team ramps up, then take the platform in-house with runbooks, dashboards and an on-call handover we author together. Some keep us on as a dedicated development team or on staff augmentation for new-rail adapters and roadmap work.
Book a discovery call for crypto payment gateway development
Bring your rails, your target chains, your merchant and licence context, and the date the gateway must be live. We come back with a control map, an architecture view and a costed plan. No demo theatre.