Julius Hetzel

Hi,
I am Julius

I am a cloud & platform engineer
with 10+ years of software engineering experience.
I design and build the foundations that power
scalable, resilient systems.

What i do

From cloud foundations to developer tooling, I enable product teams to focus on building — while I ensure everything beneath is maintainable, scalable and resilient.

Cloud Architecture & Infrastructure Automation

I design and build secure, scalable AWS environments using Infrastructure as Code and automated CI/CD.

↳ reliable, predictable infrastructure with faster delivery.

Platform Engineering & Developer Enablement

I create internal platforms and tooling that streamline workflows and reduce complexity for product teams.

↳ higher productivity, less friction, smoother development

Data & Workflow Engineering

I develop robust data pipelines and processing workflows for batch and streaming workloads

↳ data-driven insights and workflows that scale with the business

Security & Compliance by Design

I design systems using solid security fundamentals such as least-privilege access, secure workflows, and safe deployment practices.

↳ resilient systems with security built in from the start

Engineering Excellence & Team Growth

I help teams bring clarity to complex systems, improve engineering practices, and make better technical decisions. I mentor engineers and introduce sustainable development and delivery processes.

↳ stronger, more autonomous teams building maintainable systems

Selected Work

Project Logo
2022 - present PlanBlue

PlanBlue is a German startup that specializes in advanced seafloor monitoring, offering insights into seafloor health, biodiversity, carbon storage, and pollution to support sustainable marine management and conservation.

I led the design of PlanBlue’s cloud and infrastructure strategy, migrating their systems into Infrastructure as Code (IaC) and creating reproducible environments. I built individually deployable stacks, automated deployments across cloud and edge, and developed tooling and libraries that streamlined the work of data scientists...

[read more]

pythonawsterraformairflowkotlinscrumbitbucketdockertoolingclean codecloud architecturesoftware architecture

Project Logo
2019 - 2022 heyOBI

heyOBI is a digital assistant and service platform developed for OBI, connecting customers with expert advice through mobile and cloud-based services.

I helped build the heyOBI Android app from the ground up, shaping its architecture and core abstractions. I developed a reusable Android video call library based on AWS Chime and later contributed to backend features and platform-level improvements...

[read more]

androidkotlinjetpack composegraphqlawsnest.jskafkaevent sourcingopamobile architectureterraformtypescriptbitbucketcloud architecture
Interested?

Let's work
together

Professional References

“Julius has consistently delivered outstanding performance and proven himself as a reliable software engineer. Particularly noteworthy are:

  • Deep technical expertise and extensive architectural knowledge
  • Reliable and high-quality delivery as an Android Developer
  • Analytical problem-solving approach with a systematic approach
  • Smooth team collaboration and efficient communication
  • Proactive approach to work and reliable adherence to deadlines I highly recommend him for challenging technical positions.”

- Karl Bode
Senior Manager / Solutions Architect
Open Reply

“Julius is the best kind of programmer. He writes clean maintainable code and teaches everyone around him to do the same. He advocates for rational processes, and brings problems he notices to the attention of leadership in a prompt and solution-oriented manner. I would hire him again in a heartbeat”

- Mike Lee
Head of Engineering
PlanBlue

“Julius is an outstanding Software Engineer. He has an exceptional ability to grasp new concepts, which enables him to tackle complex challenges quickly without any loss of quality. He always strived to share his knowledge and was just as eager to learn from others.”

- Sascha Bosse
Android Tech Lead
Open Reply

Skills & Technologies

Cloud

AWSTerraformDocker

Data

Pipeline designDistributed processingKedroDaskzarr

Engineering

PythonTypeScriptKotlinJavaAPI DesignarchitectureAndroid

Orchestration

airflowevent-driven design

DevOps

CI/CDautomationBitbucketGitHub ActionsAnsible

Team

mentoringtechnical leadershiparchitecture guidance