About

Hey, I’m Alexander Hagemann!

I build global payments systems by day and boot-strap products by night.

Download my CV (PDF)

Saïd Business School, Oxford — 2023

What I’m doing now

Driving global payments platform dev at Marex, where my team delivers cloud-native, real-time settlement services for institutional clients
Speaking & mentoring at conferences, meetups and university capstones on clean architecture, domain-driven design and tech leadership.

How I got here

I’ve spent 15 years moving from .NET backend developer to engineering leader.

2025 — now: Software Development Manager, Marex
2022 — 2025: Lead Software Engineer, StoneX Group
2020 — 2022: Senior Software Engineer, StoneX Group
2017 — now: Founder & CEO, Cloudkasten GmbH
2010 — 2017: Various engineering & consulting gigs in automotive and e-commerce

I back-filled the technical chops with an Oxford Executive Leadership Programme and the Oxford Entrepreneurship: Venture Creation course at Saïd Business School.

Skills & experiences

.NET / C# architecture & performance tuning
Microsoft Azure, Kubernetes & event-driven micro-services
Payments & financial-market APIs
Domain-driven design, CQRS & clean architecture
Team leadership, mentoring & public speaking

Off the clock

When I’m not pairing on code or writing on alex.rocks, you’ll find me:

brewing the perfect V60,
enjoying trips with my family,
or tinkering with home-lab networking and kubernetes clusters.

Let’s connect — ideas, stories and moon-shots welcome!