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Security-First Engineering

SolutionPlus
for Fintech

German Management Security-First API-First 5–6 Clients at a Time
Encryption
AES-256 · TLS 1.3
API Architecture
REST · Webhooks
Multi-Currency
Multi-Language
Database Design
Multi-Tenant · RLS
Compliance
SOC2 · GDPR
Our Capabilities

What We Bring
to Fintech

Financial products fail in predictable ways. Permissions get retrofitted. Currency logic gets patched. Security gets audited once instead of designed in.

▸ Multi-tenant SaaS with row-level security and role-based access
▸ Payment and invoicing systems with multi-currency and multi-language support
▸ ACH payment integrations, loyalty and rewards infrastructure
▸ API-first architecture — REST, webhooks, sandbox environments
▸ Enterprise-grade encryption (AES-256, TLS 1.3) and compliance alignment (SOC2, GDPR)

We design permissions, encryption, and payment logic into the schema from the start.

Multi-Tenant SaaS
Row-level security, role-based access, and tenant isolation designed into the data model from day one
Payment & Invoicing
Multi-currency, multi-language invoicing and payment flows — ACH, card, and beyond
API-First Architecture
REST APIs, 30+ webhook events, sandbox environments — built to integrate with anything
Encryption & Compliance
AES-256, TLS 1.3, SOC2 Type II, GDPR — security and compliance as architecture decisions, not audits
Proof of Work
QuickBilling

B2B invoicing platform for freelancers. Marketing site and production application built in parallel.

▸Multi-currency, 4 languages, REST API
▸30+ webhook events, sandbox environment
▸SOC2 Type II — designed in from the schema level
6 mo.
to production
30+
webhook events
4 lang
supported
SOC2
Type II
 
SimplePay

ACH checkout replacing credit card payments — passing 2% savings back to shoppers via bank transfers.

▸Payment infrastructure across Stripe, Plaid, and Dwolla
▸Loyalty and rewards engine, merchant integration layer
▸Checkout UX designed for conversion, ACH compliance from architecture level
2%
saved for shoppers
ACH
bank transfer rails
3
payment integrations
Both products required payment logic, security, and third-party integrations to work correctly from launch, not after the first compliance review.
Engagement Model

Working With Us

Area What to expect
Team Embedded engineers, German-led, working in your timezone
Domain Payment systems, multi-tenant architecture, and compliance — understood as engineering problems, not checklists
First Results Working code within 1–3 weeks. Payment and security logic designed in from the first schema decision.
IP & Handover Your IP from day one. Documented architecture. Defined handovers. No lock-in.
Compliance SOC2 Type II, GDPR, AES-256, TLS 1.3 — designed in, not audited in. SOC2
Focus 5–6 clients at a time. Maximum attention. Zero dilution.
View QuickBilling case study getsimplepay.io Contact us