Senior Backend Engineer

About the Role

Join the engineering team of a Series A B2B SaaS company building an AI-powered omnichannel messaging and customer communication platform for SMEs. In this ownership-driven environment, you'll work end-to-end on backend systems that power real-time messaging, automation, and AI-driven workflows at scale. Your ideas will directly shape the product and architecture.

What You'll Do

• Design, build, and ship new backend features end-to-end for customers across multiple communication channels.
• Improve platform performance and reliability to enhance the overall user experience.
• Participate in architectural discussions and contribute to the long-term technical direction of the platform.
• Help shape internal development processes, tooling, and engineering best practices.
• Bring your own ideas to influence product direction and technical strategy.

What We're Looking For

• Must-have: Proficiency in both Java and TypeScript.
• Experience with Quarkus or Spring Boot (or comparable JVM frameworks).
• Solid hands-on experience with AWS and Terraform for cloud infrastructure.
• Strong PostgreSQL skills and experience with relational data modeling at scale.
• Familiarity with AI/LLM libraries such as LangGraph or similar.
• Background building scalable backend systems for communications, messaging, or similar high-throughput platforms.
• Strong computer science fundamentals (data structures, algorithms, distributed systems).
• Senior-level experience with a proven track record of delivering complex features independently.

Nice to Have

• Experience with event-driven architectures using queues and pub/sub systems (e.g. SQS, SNS).
• Familiarity with search infrastructure (e.g. OpenSearch/Elasticsearch).
• Prior work at or with B2B SaaS companies in the messaging, CRM, or customer engagement space.

Location & Work Arrangement

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