Senior Backend Engineer

About the Role

Join the engineering team of a Series A B2B SaaS company building an AI-powered omnichannel customer communication platform for SMEs. You'll work on core backend technologies that power messaging, automation, and AI-driven workflows — shipping features end-to-end in a high-ownership environment and contributing to long-term architecture decisions.

What You'll Do

• Build and deliver new backend features that reach customers directly.

• Improve platform performance and reliability to enhance the user experience at scale.

• Participate in long-term architecture discussions and help define technical direction.

• Shape internal development processes and establish best practices across the engineering team.

• Bring your own ideas to influence product and platform decisions.

What We're Looking For

• Required: Proficiency in Java and TypeScript — both are essential for this role.

• Required: Experience with Quarkus or Spring Boot (or comparable JVM frameworks).

• Required: Hands-on experience with AWS and Terraform for cloud infrastructure.

• Strong PostgreSQL experience.

• Familiarity with AI libraries such as LangGraph.

• Background building scalable backend systems for communications or messaging platforms.

• Strong computer science fundamentals and a track record delivering features end-to-end at senior level.

Tech Stack

• Backend: Java, Kotlin, Quarkus, Spring Boot, TypeScript

• Cloud & Infra: AWS (RDS/PostgreSQL, S3, SQS, SNS, SES, Lambda, CloudFront), Terraform

• AI/Search: LangGraph, OpenSearch

• Observability & tooling: DataDog, Sentry, GitHub Actions, LaunchDarkly

Location & Work Arrangement

This is a hybrid role based in Berlin, Germany. Visa sponsorship is available for qualified candidates.