file://jochen-vajda.de/index v 4.0.0 · rev. 2026-09-05 fmt: system-architecture-diagram theme · auto [light] dark

— a system architecture diagram —

Jochen Vajda

cloud architect · specialist leader · legacy transformation

idjochen-vajda

nodeneu-ulm.de

coords48°23′N · 10°00′E

stateoperational

component → relation stable in flux [c.0n] component id

[c.01.subject] rev. 2026.09 stable

Subject

The component the rest of the system depends on.

01 / 04

full name	Jochen Vajda
role	Associate VP, Architecture
employer	Deloitte
previous	Chief Software Architect, Daimler AG
focus	cloud transformation · legacy modernization
tenure	15+ years in software architecture
location	Neu-Ulm · Stuttgart

cloud-native DDD microservices platform eng strangler-fig migrations AWS · Azure · GCP

[c.02.practice] rev. 2026.09 stable

Practice

What the subject does, professionally, for money.

id	practice	description	stack / methods
p.01	Application modernization	Mainframe, COBOL, ESB, and monolith → cloud-native services. Strangler-fig migrations that don't break the business mid-quarter.	Java · Spring · Kafka · Kubernetes
p.02	Cloud architecture	Target-state architectures across AWS, Azure, GCP. Reference architectures, landing zones, platform engineering.	AWS · Azure · GCP · Terraform
p.03	Domain-driven design	Bounded contexts, event storming, ubiquitous language. Translating business processes into software boundaries that hold.	EventStorming · C4 · ArchUnit
p.04	Strategic leadership	Between steering committees and people who write the code. Roadmaps, hiring, technology selection, vendor management.	Team Topologies · OKRs · 1:1s

fig. b.1 — mainframe → cloud · ulm minster · animated plate ref: p.01

[c.03.place] rev. 2026.09 stable

Place

Where the subject is geographically anchored.

name	Neu-Ulm
land	Bavaria, DE
twin	Ulm · left bank of the Donau
border	Donau · BAY \| BW
lat / lon	48°23′N · 10°00′E
altitude	468 m ü. NHN
river	Donau · Iller
pop.	~59 000 · Ulm ~127 000

Home node: Neu-Ulm — the Bavarian twin city on the right bank of the Danube; the state border runs down the middle of the river. On the far bank: Ulm, and the cathedral in the elevation on the left, the Ulm Minster — a Gothic Lutheran church begun in 1377 and finished, slowly, over the following five centuries.

Its spire, completed in 1890, stands at 161.53 m: still the tallest church spire in the world from 1890 until 2026. Engineers tend to like this fact.

Also: Einstein was born across the river in Ulm, in 1879. The Hochschule für Gestaltung Ulm (1953–1968) helped shape modern industrial design and visual identity.

[c.04.solar] rev. live live

Solar

The sun over Ulm — today's arc, tracked as it moves.

daylight12h 33m

elapsed—

remaining—

max elev.44.7°

position now—

moon phaseWaxing crescent

[c.05.body] rev. live live

Conditions

Weather around the body, and the body itself.

[o.01] Weather Meteostat

—°C

state	—
precip.	—
wind	—
humidity	—
pressure	—

[o.02] Last activity Garmin

…

type	—
activity	—
calories	—
distance	—
pace	—

[c.06.artifacts] rev. 2026.09 stable

Artifacts

What the system produces and maintains.

id	a.01
artifact	AtlasFrame
role	creator & maintainer
description	Self-hosted photo gallery engine for curated albums — open, lean, no cloud dependency.
source	codeberg.org/jvcode/AtlasFrame ↗
powers	gallery.jvcode.de · /photographs/

[c.07.endpoints] rev. 2026.09 stable

Endpoints

How to reach the subject from elsewhere on the network.

id	protocol	address	note
e.01	linkedin://	in/jochen-vajda	primary professional channel	↗
e.02	mailto://	decoded via JS …	lower latency, higher signal	↗
e.03	https://	/photographs/	personal gallery	↗
e.04	git://	codeberg.org/jvcode/AtlasFrame	AtlasFrame source · [a.01]	↗
e.05	legal://	/impressum/	Legal notice / § 5 DDG & Privacy	↗