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.