Case studies

Production systems,documented end to end.

Payments, card issuance, KYC and AI infrastructure — mostly private source, so the engineering lives in the write-up.

RAG Support & Operations Assistant

A production LLM assistant grounded in Hizo's internal documentation and knowledge base — hybrid vector + keyword retrieval, multi-provider (Claude and OpenAI), built so that an answer it can't ground is an answer it doesn't give.

KYC

Business KYB Verification

Know Your Business verification for a payment service provider — registry lookups across markets with uneven coverage, ultimate beneficial owner resolution through nested ownership, and a review queue that routes to humans only where judgement is actually required.

Internal MCP Server for LLM Agents

A custom Model Context Protocol server exposing Hizo's internal tools and connectors to LLM agents — one audited, permissioned contract for how agents call company systems, instead of a new bespoke integration per assistant.

Payments

Cross-Border RateEngine

The core pricing layer of Hizo's neobank — a cross-border rate engine driving FX conversion, internal rate sourcing, and liquidity routing across remittance and crypto flows.

Agentic Workflows & LLM Document Extraction

LLM-assisted extraction turning unstructured identity documents into structured, validated fields for the Prova KYC pipeline — plus agentic tool-use workflows that execute multi-step KYC, transaction, and support tasks with a human in the loop.

Payments

Core Payment Infrastructure & Collections

The foundation under a payment service provider — service boundaries, a double-entry ledger as the single source of financial truth, an idempotent webhook and event backbone, and merchant collections over bank transfer, virtual accounts and cards.

KYC

Tiered KYC System (Prova)

Hizo's provider-agnostic KYC platform — tiered identity verification (Smile ID and others) with progressive feature gating that unlocks products as users complete higher verification levels.

Payments

Hizo Global Virtual Card

Architected and shipped USD virtual card issuance for a pan-African neobank — schema, REST API, security, and Interlace SDK integration — live across multiple African markets on iOS and Android.

Security

End-to-End Encryption Layer

A modern end-to-end encryption layer (X25519 key exchange, HKDF-SHA256, AES-256-GCM) for secure virtual-card detail reveals, with a Flutter client SDK so sensitive data is never exposed in transit or at rest on the server.