# Legal Notice

## Company Information

**Techventura GmbH**  
Oberhafenstraße 1  
20097 Hamburg, Germany

Managing Director: Vlad Tarasenko

Registered office: Hamburg  
District Court Hamburg, HRB 168980

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Three strictly isolated layers. Zero opaque runtime behavior. By minimizing the dependency surface, Fernel guarantees predictable, audit-ready financial operations that survive regulatory scrutiny.

Zero-Loss Orchestration for mission-critical payments

Durable Workflow Engine

The Brain

High-Performance Management

The Face

Safety-Critical Engineering with zero external dependencies

Immutable Ledger Core

The Rock

"Coreless"

Advantage

Evaluate the architecture, review the documentation, and talk to our team about your requirements.

Ship Financial Products

on a Solid Foundation.

Integration requires predictability. Fernel exposes its internal architecture through strict REST APIs, type-safe SDKs, and exhaustive documentation designed for senior engineers.

OpenAPI-first design with a type-safe client SDK for predictable integration. Additional SDKs planned.

REST API & Client SDK

ADRs, API references, integration guides. Everything your team needs to evaluate and ship.

Exhaustive Documentation

No black box. Your compliance team can review the architecture and verify security practices before signing.

Fully Auditable

reliability

Built for developers who care about

We've received your inquiry and will get back to you shortly at {email}. Our team typically responds within 24 hours.

Thank You!

Talk to our team about your requirements. No sales pitch, real conversation.

Request a Demo

Engineered for absolute state integrity. Wallets, payments, and compliance infrastructure that refuse to drift.

Every entry traceable, every balance reconstructable at any point in time.

Audit-friendly by design

High-throughput processing with predictable latency.

Immutable double-entry

Workflows ensure payments complete or roll back cleanly.

Durable workflows

Create multi-currency wallets with dedicated account identifiers.

Multi-currency accounts

build financial products

Core primitives for

No partial states. No silently swallowed exceptions. Fernel provides safety-critical infrastructure enforcing strict serializability across ledgers, durable payment workflows, and compliance primitives.

Financial State is Absolute.

The Financial Operating System

Fernel

Regulators audit architecture, not marketing. Fernel embeds compliance into the infrastructure layer, minimizing operational risk through immutable data structures.

Immutable audit trails, double-entry integrity, and tenant isolation. The building blocks auditors look for.

Compliance-Ready Architecture

Architectural foundations for ICT risk management (Art. 5-15): deterministic execution, hash-chained audit, minimal dependency surface.

DORA-Aligned Architecture

Consistent latency under load. No unpredictable pauses, no hidden overhead, no surprises.

Predictable Performance

Self-contained deployment. Minimal external dependencies. Verifiable builds.

Minimal Attack Surface

Regulatory Alignment

Safety-Critical

Built for

Finance

Wallets, payments, compliance, reconciliation. One consistent REST API covering the full financial operations lifecycle.

Our team has built financial systems across banking, payments, and compliance since 2010.

Core banking systems hide their flaws behind vendor lock-in. Fernel inverts this model. We provide a transparent, verifiable financial core built on absolute technical honesty. You own the architecture.