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$
USD
I will develop a fintech app, wallet, payments, banking and crypto
Custom mobile apps built with Figma UIUX and FlutterFlow magic
Hi, I’m Williams W, a UI/UX designer and FlutterFlow developer who helps businesses and founders build custom mobile apps that users actually want to use.
I turn raw ideas into polished, high-perform...
About this Gig
Custom Fintech Solutions Built for Scale, Security, and Speed!
I help fintech companies accelerate development with custom-built modules tailored for real-world financial applications.
Features:
- A multi-currency wallet system
- Crypto on-ramp & off-ramp
- Payment gateways
- Core-banking integration
- Auth module
- KYC/KYB
- Compliace module
- Mobile-friendly
- AML/Fraud detection
- Transfers and transactions
- Categorisation engine
- Fees management
- Custom AI support chat
- Dashboard and admin panel
Technical Highlights:
1) Authentication Module. Secure login flows via email, SMS. OTP/MFA/JWT
2) Immutable Ledger. Track balances and transactions with append-only logic, audit-ready compliance
3) Payment Gateways. Stripe, PayPal, or custom APIs for deposits, withdrawals, and transaction reconciliation
4) Domain Features. KYC/KYB, AML, Fraud Detection, Automated flows, and modular rule engines
5) API-First Architecture. REST/ OpenAPI / GraphQL support
6) Enterprise-Grade Security. Token-based auth, least privilege IAM, encrypted data at rest and in transit
7) Scalable by Design. Serverless-first architecture
Contact me now!
Cloud Provider:
Amazon Web Services
Expertise:
Installation
•
Deployment
•
Backup
•
Migration
•
Configuration
Frameworks:
Npm
My Portfolio
FAQ
What technologies do you use to build the fintech solution?
I use a modern, scalable stack including TypeScript, Node.js, PostgreSQL, and AWS serverless services. This ensures high availability, performance, and cost-efficiency for financial-grade applications
Is the wallet solution secure and compliant?
Yes. The wallet module uses an immutable ledger design to ensure every transaction is traceable and tamper-proof. Security best practices (encrypted data at rest/in-transit, JWT tokens, IAM roles) are baked in. For compliance-heavy environments, I can support KYC/AML add-ons
Can I integrate this with my existing system or mobile app?
Absolutely. All modules are API-first and come with Swagger/OpenAPI documentation for easy integration. I can also help align the system with your frontend or third-party platforms
Do you support multiple currencies or multi-tenant setups?
Yes, these can be added as extras or scoped in a custom offer. Multi-currency support includes currency conversion logic and accurate decimal handling. Multi-tenant support enables isolated wallets and transactions per client or user group
Will I get the full source code?
Yes. You will receive clean, well-documented, production-ready code that you fully own
