Your mission

Who we are

We are simple system – a fast-growing B2B SaaS company based in Munich and Cologne, developing industry-leading procurement software incl. a state-of-the-art B2B marketplace for mid‑sized businesses across Germany, Austria, and Switzerland. With 23,000+ monthly users, 850+ suppliers and partners, €150M+ in platform transaction volume and a 40‑person team, we are building the next generation of B2B commerce. And we’re just getting started.

Team & Technology

The engineering team works closely with business and product, has an impact on the product development roadmap and full autonomy of the tools and technologies used. At simple system we build the best product in the market by fighting for the best solution internally – the engineering perspective being on eye level with the business and product perspective. Our B2B solution has been designed and developed according to modern methodologies and principles. You will be joining a cross‑functional team of very experienced engineers, who believe in making great products and have all the technical skills to make it happen. Occasionally, we meet together to discuss the most important project matters and get to know each other during project workshops (on‑site in Warsaw or Munich). Our technology stack: Spring Boot, PostgreSQL, Elasticsearch, MongoDB, Kafka, ArchUnit, AWS S3, CloudWatch, EKS, Prometheus, Alertmanager, Grafana, Kubernetes, GitHub Actions, Terraform, Ansible, Cypress.

Your part

As a Java Developer, you will be responsible for the design and development of the backend services of the system. You will be joining a cross‑functional team of very experienced engineers, who believe in making great products and have all the technical skills to make it happen. You will leverage AI smartly in your day‑to‑day work and as a powerful building block in customer‑centric feature development.

Requirements

5+ years of professional experience building modern web applications
Good command of recent Java versions (preferably 19+)
Good knowledge of Spring Boot (preferably 3+)
Ability to make design decisions that result in correct, reliable, performant & scalable systems
Experience with Scrum / Agile environment
Be open and willing to learn from mistakes
Fluent in English

Nice to have

Hands‑on experience with ElasticSearch, MongoDB or Kafka
Experience with AWS or Kubernetes
Experience with Kotlin

Why us?

Why us

We’re a no‑nonsense, “roll‑up‑your‑sleeves” team with a deep sense of ownership and customer focus
We offer real responsibility and entrepreneurial freedom – you’ll shape not just our tech stack, but our company’s future
We operate with flat hierarchies, fast decisions and high transparency
We’re backed by a single strategic investor and have an ambition to become the dominant player in procurement software for mid‑sized companies in Europe
We have an awesome team that loves working together

Location & Benefits

Location: Munich‑Pasing
Hybrid setup: In‑office days on Tuesdays & Wednesdays, flexible working hours
Top‑tier work equipment
Multisport membership
Free breakfast & lunch in our in‑house canteen
Attractive compensation
Regular company updates and team‑building activities
Individual career path and regular feedback every 6 months

You’ll be part of an international team where you can use your creativity and enjoy a fun working environment. If communication in English and GIFs, flat organization structure, and permanent challenges make you feel like a kid in a candy store, let’s talk.

About us

We are simple system – a fast-growing B2B SaaS company based in Munich and Cologne, developing industry‑leading procurement software incl. a state‑of‑the‑art B2B marketplace for mid‑sized businesses across Germany, Austria, and Switzerland. With 23,000+ monthly users, 850+ suppliers and partners, €150M+ in platform transaction volume and a 40‑person team, we are building the next generation of B2B commerce. And we’re just getting started.

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simple system

Jobs:

(Senior) Backend Engineer Java (m / f / d)

(Senior) Backend Engineer Java (m / f / d)

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