Fintech web · engineering partner
A fintech web development company
for web products your regulator can read.
TrustChange is a fintech web development company for EU-facing banks, neobanks, PSPs, EMIs, crypto operators and licensed VASPs. We deliver bespoke fintech web development services end to end — the signed-in customer app, the internal ops and treasury console, and the public marketing and partner site — on one design system, in your repositories, with PSD2- and GDPR-aware controls engineered in.
- EU-based engineers
- PSD2-aware delivery
- WCAG 2.2 AA baseline
- Core Web Vitals in CI
- GDPR-aware storage
What "fintech web" means here
Fintech website development services that treat the web as part of the platform
Most searches for fintech web development services surface generic agencies with no regulated-industry depth, or site builders that lock the whole surface behind a licence. We work the other way. TrustChange is a fintech web development partner: your brand, your data, your telemetry, your code — engineered against the same controls and audit expectations as the rest of your platform.
Mobile alongside web? See fintech mobile app development company and fintech app development company. Platform view: fintech infrastructure.
Product surface
Three surfaces in every fintech web development company engagement
A fintech's web is not one site. It is the signed-in product your customers work in, the console your ops and treasury team runs, and the public marketing and partner surface. We ship all three on one design system so support does not feel like a different company.
-
01
Customer web product
The signed-in web app your customers work in — onboarding, dashboards, transfers, statements, cards, wallets and self-service support under your brand.
- Design tokens per tenant
- Accessible, keyboard-first
- SSO + step-up auth
-
02
Operator & treasury console
Internal web console for ops, risk, treasury and support — users, transfers, cases, limits, keys, screening decisions and manual overrides behind role-based access.
- Role-based access
- Four-eyes on overrides
- Bulk actions with audit
-
03
Marketing & partner site
The public web surface — product pages, pricing, docs, sandbox links and partner or affiliate portals — built on the same design system as the product.
- Static, SEO-shaped
- Docs & sandbox portal
- Consent management
Stack
What sits behind fintech web development services
Eight layers, one system. Every layer names an owner, a control and a piece of evidence — nothing is left implied under the "fintech web" label.
Payments layer: payment gateway engineering. AML tooling: AML case management software development. Delivery patterns: how we deliver.
| Layer | What we build |
|---|---|
| Frontend framework | Modern SSR/SSG (React, Astro or Next) with typed components and design tokens Framework choice matches your existing team, not our preference. |
| Design system | Tokens, primitives and patterns shared across product, admin and marketing surfaces One system so a support agent's console feels like the customer app. |
| Auth & session | SSO, MFA, step-up for money-moving actions and short-lived signed requests Bound to your identity provider; no shadow user store. |
| APIs & signed requests | REST and webhook contracts against your ledger, screening and payments services Every write is idempotent and stamped with an operator id. |
| Client-side data | Cache with revalidation, optimistic updates only where safe, no local money state Money truth stays on the server; the web app never guesses balances. |
| Compliance & privacy | Cookie consent, PSD2-aware consent flows, GDPR-aware telemetry and retention Only necessary data crosses the origin; PII stays inside your regions. |
| Performance & accessibility | Core Web Vitals budgets, WCAG 2.2 AA baseline, keyboard-first UX and prefers-reduced-motion respected Budgets are tracked in CI, not left as a launch aspiration. |
| Runtime & delivery | EU-hosted, CI/CD pipelines, observability, canary releases, 24/7 on-call cover Your identity provider, your CDN choice, your data regions. |
Request path
How a money-moving click crosses the web app
Every action in the fintech web product goes through the same gates before it reaches the ledger. The browser never holds money truth, and no request is trusted on device metadata alone.
- 01
Request
Real time
A user clicks in the web product; the request is authenticated and stamped with device metadata.
- 02
Policy
Sub-second
Session, role and step-up rules run at the edge before any call reaches the ledger.
- 03
API call
Server-side
The web app calls your API layer with an idempotency key; nothing sensitive lives in the browser.
- 04
Service
Server-side
Ledger, screening or payment service runs the write against typed contracts and returns a signed result.
- 05
Render
Immediate
The web app re-renders from the source of truth; caches revalidate; audit-log entries are written server-side.
Delivery
How we deliver a fintech web development services engagement
Five steps, in this order. Regulated web work runs inside the product backlog — no separate compliance phase bolted on before launch, no big-bang release of an untested web app.
- 01
Scoping
Weeks 1–2
We map surfaces, users, roles, journeys, licence context and the risk you must stand behind. Output: a scope, a control map and a costed plan.
- 02
Design system + IA
Weeks 3–4
Tokens, primitives and patterns land first, alongside information architecture and accessibility baselines. The system is the contract.
- 03
Build
Two-week sprints
Customer, admin and marketing surfaces ship in slices against typed API contracts. Each merge runs tests, static checks and a dependency scan.
- 04
Hardening
Before launch
Accessibility passes, performance budgets, browser matrix, load work and a third-party pen-test window. Rollback is rehearsed with your ops team.
- 05
Launch and run
Cutover + ongoing
Canary release, named engineers on 24/7 cover, runbooks, dashboards and the audit bundle handed to your team on day one.
Engagement
Four ways to buy engineering from a fintech web development company
Same engineers, same standard. Only the commercial shape changes.
-
Fixed-scope build
A defined web platform at a fixed price and date. Best when surfaces and journeys are settled.
-
Dedicated team
A standing EU squad with a lead. Best for long roadmaps and steady release cycles.
-
Staff augmentation
Senior web engineers inside your team. Best when you already own the plan and need frontend depth.
-
CTO advisory
Architecture, framework and design-system review before you commit. Best at the design stage.
Questions
FAQ: fintech web development services
Six answers up front on scope, agency-vs-partner, frontend stack, PSD2/AML/GDPR, accessibility & performance and ongoing support. Bring the rest to the call.
What do fintech web development services from TrustChange actually cover?
We engineer bespoke, client-owned web products for regulated fintechs end to end — the signed-in customer app, the internal ops/treasury console, and the public marketing and partner site. Everything ships as source code in your repositories, with the IP assigned to you. No SaaS licence, no shared multi-tenant backend, no vendor gate between you and your users.
How is your fintech website development services offering different from a generic agency?
A generic agency will treat a fintech website as a marketing project. TrustChange treats it as part of a regulated platform: PSD2-aware consent flows, GDPR-aware telemetry, WCAG 2.2 AA baseline, Core Web Vitals budgets tracked in CI, and clean contracts with your ledger, screening and payment services. The marketing site, the customer product and the admin console share the same design system so support does not feel like a different company.
Which frontend stack does a fintech web development company use here?
The framework choice fits your existing team — most engagements land on React with a modern SSR/SSG shell (Next or Astro) plus a typed component library and a design-token system. We are not dogmatic about the framework; we are dogmatic about typed contracts, accessibility, performance budgets and the compliance controls that sit around it. The stack is documented so your team can extend it after handover.
How are PSD2, AML, MiCA and GDPR engineered into the web surface?
TrustChange is an engineering partner, not a law firm — your compliance team sets the policy, we ship the controls. That means SCA and step-up on money-moving actions, PSD2-aware consent for open-banking flows, KYC/KYB flows plumbed into the web onboarding, GDPR-aware telemetry with data mapping and retention, and cookie consent that actually blocks scripts. Nothing about licences, opinions or supervisor approvals is claimed on your behalf.
How do you handle accessibility, performance and localisation?
WCAG 2.2 AA is the baseline: semantic HTML, keyboard-first navigation, visible focus, no motion for prefers-reduced-motion, and screen-reader passes on the critical journeys. Performance is budgeted (Core Web Vitals in CI), and localisation runs off an i18n layer with locale-specific formatting for money, dates and legal text. Regressions block merges — they are not fixed after launch.
Do you also run the web platform after launch, or hand it over?
Both are on the table. Most clients start with named TrustChange engineers on 24/7 cover for 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 design-system, product and marketing-site roadmap work.
Book a discovery call for fintech web development services
Bring your surfaces, your target regions, your licence context and where the pain sits — a slow product app, an inaccessible admin, a marketing site that broke a PSD2 consent, or a design system pulling in three directions. We come back with a control map, an architecture view and a costed plan. No demo theatre.