Senior-led software engineering

Complex systems.
Clear thinking.
Lasting impact.

We connect the moving parts of your business. Thoughtful architecture, hands-on engineering, and the experience to see it through.

Experience across systems that matter.

Financial services Industrial technology Healthcare
01 / Selected work

The thinking.
The work. The impact.

A selection of Crixus projects and founder experience. Real challenges, considered solutions.

6 projects shown

Platform engineering

One platform. Many providers.

An API-first transaction platform built to bring complex supplier workflows behind a consistent interface.

Founder experience & later Crixus delivery

Legacy modernization

New capabilities. Existing foundations.

Connecting a new loan-origination platform to an established banking environment, while retaining valuable workflows.

Crixus · partner engagement

Industrial software

Turning machine signals into usable data.

Commercial industrial modules connecting equipment protocols with a common automation environment.

Founder experience & later Crixus delivery

Founder experience

From printed statements to digital delivery.

Customer-specific banking documents delivered through an authenticated online portal.

Before Crixus · former-employer work

Kiipad · working prototype

Making business records work together.

A user-guided workflow connecting documents, structured data, and accounting systems.

Crixus-owned · working prototype

Sujes / Assemblor · pilot

AI-assisted delivery. Senior accountability.

Role-separated agents operating within a delivery process directed and approved by an experienced engineer.

Crixus-owned · pre-release paid-work pilot

Confidential by design. Client engagements are anonymized; each case study identifies the delivery context. Diagrams illustrate systems, not client interfaces.

02 / Our expertise

Deep expertise.
Practical delivery.

From the first architecture decision to the details that make a system work. We bring clarity to complex technical challenges.

Find the right approach
01

Architecture & platforms

API-first systems, stable abstractions, and maintainable foundations shaped around how your business operates.

02

Systems integration

Connect providers, financial systems, industrial equipment, and business applications through clear, dependable contracts.

03

Legacy modernization

Understand what already works. Extend valuable systems with carefully scoped changes and a considered path forward.

04

Workflow & delivery automation

Connect repetitive processes with purpose-built software and AI-assisted workflows, with senior engineering oversight.

Jermaine Rattray, founder of Crixus
Jermaine Rattray Founder & engineer
03 / The person behind the work

Senior thinking.
Hands-on from day one.

Crixus is led by Jermaine Rattray, a software engineer, architect, and technical lead with approximately two decades of experience.

That experience spans banking, healthcare, industrial technology, and long-lived business platforms. It brings a practical understanding of what it takes to build software—and remain accountable as it evolves.

Founded in 2021, Crixus brings that perspective to every engagement: understand the business, make the right technical decisions, and stay close to the implementation.

We think in code. And start with the problem you need to solve.
04 / Working together

A clear path through complexity.

01 / UNDERSTAND

Get to the real problem.

Explore your goals, constraints, existing systems, and the workflows that matter. Start with context before choosing tools.

02 / ENGINEER

Make considered choices.

Define the approach, implement the critical pieces, and keep decisions connected to the business need.

03 / EVOLVE

Build for what comes next.

Document the system, support handover, and establish a foundation that can evolve with your operation.

Let’s build something that matters

Your next challenge.
Our kind of thinking.

A platform to build, a system to connect, or a workflow to rethink? Let’s start with a conversation.

Discuss your project

CRIXUS / SELECTED WORK