About the role
**About Heidi Systems
**Heidi Systems is building the data infrastructure layer for buildings and energy. We help property owners and managers digitize metering, consumption data, reporting, and billing workflows in one of the largest and most outdated infrastructure markets in Europe.
We are looking for an exceptional intern who wants to work close to the core of our technical system: data architecture, DevOps, infrastructure, and backend tooling.
This is not a classic internship. You will work directly on production-relevant systems, help shape our data infrastructure, and build tools that directly impact customers, internal operations, and the scalability of the company.
Tasks
What you will work on
Build and improve our data ingestion and processing infrastructure
Work on backend services in Go and TypeScript
Support the architecture of reliable data pipelines for meter, gateway, and building data
Improve internal DevOps workflows, deployments, monitoring, and system reliability
Work with configuration formats such as YAML and TOML
Help structure, validate, and transform high-volume device and consumption data
Build internal tools that make our operations faster and more automated
Support debugging of real-world infrastructure issues across gateways, MQTT, APIs, and databases
Work closely with the founding team on technical architecture decisions
Requirements
Who we are looking for
We are looking for someone unusually strong, curious, and hands-on.
You should be excited about infrastructure, data systems, and clean technical architecture. You do not need to know everything already, but you should learn extremely fast, think from first principles, and enjoy solving hard technical problems.
You are a great fit if you:
Have strong coding ability and a clear technical mindset
Are comfortable working independently and taking ownership
Care about clean systems, reliability, and scalability
Enjoy working close to real-world infrastructure and messy data
Are curious about DevOps, backend architecture, and data engineering
Like fast-moving environments with high responsibility
Want to build systems that are used in the real world, not just prototypes
Tech stack
Go / Golang
TypeScript
YAML
TOML
MQTT / IoT data streams
APIs, databases, and data pipelines
DevOps tooling, monitoring, and deployment infrastructure
Benefits
Why join us
Work directly with the founding team
Own real technical projects from day one
Learn how to build infrastructure for a fast-growing startup
Get exposure to DevOps, data architecture, IoT, energy, and real estate infrastructure
Help shape the technical foundation of a company tackling a huge, outdated market
High ownership, high learning curve, high impact
**Location
**Berlin preferred. Hybrid setup possible.
Start
As soon as possible.
**How to apply
**Send us a short note, your CV or GitHub profile, and ideally one project you are proud of.
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