Senior Backend Data Engineer

Blocks; Berlin; Vor Ort; EUR 60.000 - 90.000; Vollzeit

Benefits dieser Stelle

Competitive compensation

Equity opportunities

Relocation support

Fast-paced work environment

Ownership and impact in product development

Zusammenfassung

A tech startup specializing in cloud solutions in Berlin is looking for a Backend Engineer to architect and build core systems for their cloud cost optimization platform. The ideal candidate will have deep expertise in Python and FastAPI, with strong experience in AWS and data orchestration tools. Responsibilities include designing multi-tenant databases and developing APIs. The role emphasizes ownership and direct impact in a fast-paced startup environment, with competitive compensation and relocation support.

Qualifikationen

• Deep expertise in Python and FastAPI.
• Hands-on experience with data processing tools like Pandas and Airflow.
• Strong AWS skills, particularly with CloudFormation and billing APIs.
• Ability to architect and scale data infrastructure.

Aufgaben

• Architect and build backend systems for cloud cost optimization.
• Design database schema and high-performance APIs.
• Implement CI/CD processes and testing frameworks.

Kenntnisse

Python and FastAPI expertise

Data processing and orchestration

Data infrastructure design and scaling

Strong AWS experience

System design leadership

Startup execution mindset

Problem solving

Effective communication

Tools

Pandas

PySpark

Airflow

Trino

SQL databases

Iceberg-based data lakes

CloudFormation

Jobbeschreibung

Who we are

BLOCKS is bringing big-company cloud efficiency to startups and SMEs. We guarantee 20% savings from day one by pooling cloud spend into a group-buying model. From there, our AI agent “Major Tom” acts like a virtual DevOps engineer, finding waste, optimizing infrastructure, all in an automated way to maximize cloud efficiency. This is just the beginning; more to follow in our discussion with you.

Our founders Oliver and Andreas are serial entrepreneurs, have raised >$1 billion, and successfully sold multiple businesses.

Your role

You'll architect and build the core backend systems powering our cloud cost optimization platform from day zero. You'll design the multi-tenant database architecture, develop high-performance APIs in Python and FastAPI, and design the AWS ETL pipelines that transform billing and usage data into structured cost insights for automated savings plan management.

Your immediate focus: Build the backend for our 1-click AWS connection flow, design the database schema for multi-tenancy (SQL + Iceberg), and create the API architecture serving our web dashboard. You'll also develop the backend logic for our AI DevOps agent “Major Tom,” including automated server scheduling, cost anomaly detection, and AWS invoice processing using Airflow, PySpark, and Trino.

As one of our founding engineers, you'll own critical architectural decisions that scale from startup to enterprise. You'll work directly with AWS APIs, define a high-coverage testing framework, and implement CI/CD from day one to enable rapid iteration, seamless deployment, and high uptime.

What you bring

• Deep expertise in Python and FastAPI: You have built and operated production-grade systems end-to-end with clean, maintainable architecture

• Strong background in data processing and orchestration: You are hands-on with Pandas, PySpark, Airflow, and Trino for large-scale distributed data workflows

• Proven ability to design, optimise, and scale data infrastructure: You have architected SQL databases and Iceberg-based data lakes for performance, reliability, and cost efficiency

• Strong AWS experience: You know CloudFormation, cross-account IAM roles, billing/cost APIs, and automated infrastructure workflows by heart

• Led system design and delivery: You have mentored peers, reviewed designs, and driven architectural decisions for scalable, maintainable services

• Startup execution mindset: You have shipped 0→1 products fast with high ownership, autonomy, and accountability

• Curious, pragmatic problem solver: You experiment quickly, learn deeply, and optimise for impact over theory

• Direct communicator: You value clarity and feedback as tools for speed, improvement, and alignment

• Demonstrated impact: You have impressive achievements from previous jobs and from side projects. Please share them with us.

What we offer

• Build where AI actually matters. Real AI shipped into production that changes how companies run cloud infrastructure.

• Work with founders who’ve done it before. Unicorn builders, $1B+ raised, zero politics, fast calls, radical candor. We move, not debate.

• Zero to One. The opportunity to build a product which startups will consider standard infrastructure.

• Real ownership, not theater. We challenge, you make calls. Some will be wrong. That’s fine. We fix fast and keep shipping.

• Compensation that reflects ambition. Top market cash compensation plus meaningful equity upside.

• Berlin, in person, by design. Early stage companies are built together, not on Zoom. We support relocation.

How we hire

We believe hiring should be like we build: Fast, respecting your time and ours, to the point:

• Intro call with a founding team member (30 min)

• Tech interview/assessment with an engineer (~60 min)

• In-person tech case study with founders and engineers (1-2 hours)

• Offer call within 24 hours with a founder (15 min)