Software Engineer - Java/Kotlin / Middle+ at Plata Card

✨ The Stack take on this Plata Card job

• 🏢 Plata Card has 34 jobs here, 34 with visa sponsorship see all
• 🛂 Visa: EU Blue Card. Minimum salary: €50,700 a year guide
• 💡 No salary shown. Ask Plata Card if it is above the minimum.

Updated 2026-11-03, from our data and official sources.

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About the role

Responsibilities:
- Build, maintain and optimize scalable backend services using Kotlin/Java.
- Design APIs, system components and integrations within the authorization domain (OAuth2).
- Work on high-impact features used by many internal teams; clarify requirements and propose solutions.
- Implement performance and reliability improvements and participate in on-call incident response.
- Integrate services with AWS, databases, message brokers and internal consumers.
- Own small-to-medium initiatives from design through production rollout.

Requirements:
- 3+ years in backend development with strong knowledge of a JVM language (Kotlin preferred).
- Hands-on experience with Micronaut or Spring, PostgreSQL, Redis and Kafka.
- Comfortable with ambiguous problem statements and able to design pragmatic solutions.
- Experience in platform or high-load product teams is a strong plus.
- B1+ English for cross-functional communication.
- Bonus: led non-trivial refactors, system design under uncertainty, or interest in learning Go.

Responsibilities

You will build and maintain scalable backend services using Kotlin while participating in incident response and on-call rotations. Additionally, you will clarify requirements with stakeholders and design robust solutions within the authorization domain.

Requirements

Candidates must have at least 3 years of experience in a similar role with strong knowledge of JVM languages like Java or Kotlin. You should be comfortable working with ambiguity and have experience with technologies such as Micronaut, PostgreSQL, Redis, and Kafka.

Key skills

• Java — in 347 other listings on The Stack
• Kotlin — in 249 other listings on The Stack
• Micronaut — in 1 other listing on The Stack
• PostgreSQL — in 290 other listings on The Stack
• Redis — in 119 other listings on The Stack
• Kafka — in 167 other listings on The Stack
• OAuth2 — in 7 other listings on The Stack
• AWS — in 788 other listings on The Stack
• Backend development
• System architecture
• Incident response
• API design
• GraalVM
• JOOQ
• Liquibase
• gRPC

On The Stack (as of 2026-11-03)

• Plata Card has 33 other listings on The Stack, 33 of them marked as offering visa sponsorship.
• 162 visa-sponsored jobs in Germany on The Stack, posted in the last 60 days.
• 180 visa-sponsored software engineer jobs in Europe on The Stack, posted in the last 60 days.

Frequently asked questions about Plata Card

Is this Software Engineer - Java/Kotlin / Middle+ role still open?

It was posted on 2026-08-25. Listings more than 30 days old may no longer be active, so check Plata Card's site before applying.

Does Plata Card offer visa sponsorship?

This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Plata Card's site.

Where is this role located?

The listing gives the location as Germany. It is marked on-site.

What skills does this role ask for?

The listing names: Java, Kotlin, Micronaut, PostgreSQL, Redis, Kafka, OAuth2, AWS, Backend development, System architecture, Incident response, API design, GraalVM, JOOQ, Liquibase, gRPC.