Senior Backend Engineer

This Senior Backend Engineer role builds and owns distributed systems for Zeta's CRM platform, handling a high-throughput event pipeline processing tens of thousands of messages per second. The engineer will design and implement core components, ensure product quality, and take ownership of significant components. Requires 5+ years of experience with Python, Ruby, or J2EE, plus strong knowledge of Kafka, Elasticsearch, NoSQL databases, and AWS.

This role designs and implements scalable backend services and libraries that serve as the foundation for Similarweb's B2B platform, handling hundreds of terabytes in production. The engineer builds developer tools, promotes best practices for code quality and reliability, and leads the adoption of AI tools for code generation and debugging. Requires 5+ years of backend/infrastructure experience, proficiency in C#, Python, Java, or Go, and experience with cloud platforms and Kubernetes.

This role serves as the backend technical anchor for the Frisbee Rewards consumer app, designing and owning Rust-based microservices that control business logic and UX configuration. The engineer will define APIs and data models, collaborate with mobile teams, and provide architectural guidance. Requires 6+ years of backend experience and familiarity with configuration-driven architectures.

This Lead Backend Engineer role designs and owns distributed systems for Zeta's CRM platform, focusing on high-throughput mobile communication services like SMS, MMS, and RCS. The engineer will lead architecture, ensure scalability and reliability, and mentor the team. Requires 8-12 years of experience with Python, Ruby, or J2EE, plus expertise in Kafka, Elasticsearch, NoSQL databases, and cloud-native architectures.

This Senior Frontend Engineer role focuses on building and scaling the Editor platform, a creative production tool for designing, animating, and scaling ad assets. You will own end-to-end vertical slices, lead technical design decisions, and mentor team members, leveraging deep expertise in React and TypeScript with high-performance canvas interactions. The role requires 6+ years of experience and a hybrid presence in Helsinki.

This Senior Product Manager role owns the next generation of Smartly's Triggers, a core optimization feature managing over $1B in annual ad spend. The PM will lead discovery, define the roadmap, and launch a closed alpha with select customers, working closely with engineering and channel teams. Requires 5+ years of B2B SaaS product management experience, ideally in digital advertising, with strong data analysis and cross-functional leadership skills.

This Senior Software Engineer role is part of Team Autopsy, which builds automation and optimization capabilities for Smartly's advertising platform, including services like Triggers, Ad Rotation, Smartly Actions, and Action Router. The engineer will design and maintain backend services and frontend applications using TypeScript, Node.js, Python, and React, with a focus on distributed systems and cloud-native practices. Requires strong experience in backend development, automated testing, and the ability to drive projects independently.