SWE – Senior Engineer (backend)

Our client, an Early-stage user data AI platform, are hiring a Senior Backend Engineer to join their team in New York. The successful candidate will help design and build the core systems powering a fast-growing, event-driven platform, while also taking end-to-end ownership of the backend infrastructure stack.

Responsibilities

• Design and implement scalable, event-driven, microservice-based architectures capable of processing millions of events per day.

• Build and maintain fault-tolerant, decoupled systems with a strong focus on reliability and performance.

• Work extensively with event streaming and processing platforms such as Kafka, Kinesis, Google Cloud Pub/Sub and Flink.

• Design robust data models and ontologies that ensure long-term system health and support product evolution.

• Develop and maintain backend services using Node.js, PostgreSQL and AWS.

• Design and expose APIs that power both user-facing features and internal systems.

• Contribute across the full backend stack, including infrastructure, CI/CD pipelines and system tooling.

• Collaborate closely with product and engineering teams to translate requirements into well-structured technical solutions.

• Participate in code reviews, mentor other engineers, and help raise engineering standards across the team.

• Make pragmatic engineering trade-offs between speed, scalability and long-term maintainability.

Skillset

• Strong experience designing and building distributed, scalable backend systems.

• Proven track record of working with event-driven architectures and streaming technologies.

• Deep understanding of data modelling, system design and large-scale data processing.

• Strong proficiency in Node.js, PostgreSQL and AWS.

• Experience with CI/CD pipelines and Infrastructure-as-Code tools such as Docker, Kubernetes, Terraform or Pulumi.

• Ability to operate effectively in fast-moving environments and rapidly adapt to new technologies.

• High engineering standards with a strong focus on code quality, reliability and maintainability.

• Strong communication skills with experience working across multiple teams and disciplines.

• Product-minded approach with an understanding of how technical decisions impact user experience and outcomes.

Benefits

• Salary: $130k – $220k.