GlassFlow is a startup building the open-source data streaming infra for the next generation of developers and AI companies: Easy to use, massively scalable and optimized for the AI era.

We’re a Berlin startup with a Silicon Valley mentality, backed with $4.8m from Upfront Ventures, the CEO of GitHub, the ex-CTO of Aiven, and more world-class investors.

The founders are serial entrepreneurs with more +10y of experience in building and selling data products.

Why is this role special

This isn’t just another backend role. As a Founding Engineer at GlassFlow, you’ll be shaping the core technology, culture, and trajectory of the company. The code you write will power pipelines for billions of data events created by enterprises around the world.

You’ll be working in a fast, high-ownership environment where speed matters, curiosity is rewarded, and ambition is the norm.

What you’ll do

Build and scale high-performance, low-latency systems in GoLang.

Take complete ownership of projects from idea to production.

Ship fast, break things, learn, and ship again.

Help define the technical culture of GlassFlow.

Work directly with the founders to solve problems in a way that no one has solved before in real-time data infrastructure.

Requirements

You are:

Deep expertise in Go.

Hungry, competitive, and resilient.

Someone with impressive achievements that prove you’re a 10x builder.

A fast learner who thrives in chaos.

Hands-on, pragmatic, and deeply technical.

Actively looking for startup culture.

Previous experience that could be helpful:

Experience with public or private clouds (AWS / GCP / Azure)

Experience with K8s, Docker, Docker Compose

Experience developing on and using queue systems like Kafka, NATS, SQS, and RabbitMQ

Worked in fast-growing environments or early-stage startups

Openness to using AI tools in coding (e.g., Cursor) is considered a plus

Ability to adapt quickly and make compromises in writing code when necessary

This role is not for you if you:

Expect long and detailed roadmaps.

Need a structured process or step-by-step instructions.

Want the “safe” path.

Are afraid of chaos.

Can’t handle pressure.

Want “perfect” code.

Are afraid of wearing multiple hats.

Benefits

What you’ll get

Real ownership: competitive equity (everyone at GlassFlow is an owner).

The chance to build something that changes how the world streams data.

The opportunity to build for global tech brands from day one.

A career trajectory that will 10x your skills and network.

Benefits:

Competitive salary with Stock Option Grant

Ticket for public transportation in Berlin

Company credit card with a monthly allowance

Newest tech of your choosing

Annual Learning budget for personal development

Generous WFH policy and a budget for home office setup

GlassFlow is an equal opportunity employer that values diversity in the workplace. We encourage applications from all qualified individuals, including those with diverse backgrounds and disabilities.