Senior FullStack Engineer – Real User Monitoring (RUM)

. Build and evolve fullstack features for Real User Monitoring (RUM), spanning frontend experiences, backend services, APIs, and storage systems .

Posted 9/25/2026full-timeRemote • United States, CanadaSenior💰 $154,445 - $185,334 per yearWebsite

Tools & technologies

ApacheAWSAzureCassandraDistributed SystemsDockerGoogle Cloud PlatformKafkaKubernetesPostgresReactTypeScriptGo

Key responsibilities & impact

Build and evolve fullstack features for Real User Monitoring (RUM), spanning frontend experiences, backend services, APIs, and storage systems
Design and implement systems that ingest, store, and query high-cardinality, high-volume telemetry using columnar and analytical databases
Develop performant query layers and APIs for real-time exploration of user sessions, traces, and events
Contribute to frontend applications that visualize RUM data and help users debug performance issues and understand user behavior
Work on data modeling, indexing strategies, and query optimization for low-latency, cost-efficient analytics at scale
Collaborate with browser and mobile SDK engineers on data ingestion and schema evolution
Own projects end-to-end, from design and implementation through deployment, monitoring, and iteration
Break down complex problems into incremental deliverables and iterate based on feedback
Ensure quality through testing, system observability, documentation, and smooth upgrade paths
Collaborate with backend, frontend, product, and solutions engineering teams
Support teammates, participate in technical design discussions, and help shape the RUM roadmap

What you’ll need

5+ years of fullstack engineering experience with strong frontend fundamentals
Frontend experience with TypeScript and React
Backend experience; Go is preferred
Experience building or operating distributed systems in production, such as Kafka, WarpStream, Apache Pinot, ClickHouse, Cassandra, or Postgres
Familiarity with Docker, Kubernetes, AWS, GCP, or Azure
Experience working with high-throughput, high-cardinality data, including logs, metrics, traces, and events
Strong understanding of data modeling, query optimization, and performance tradeoffs
Experience designing and building APIs and distributed services
Experience building data-heavy UIs, dashboards, query tools, or debugging interfaces
Familiarity with observability concepts and/or OpenTelemetry
Strong communication skills and ability to work in a remote, distributed team
Pragmatic, self-driven, and comfortable navigating ambiguity
Customer-focused mindset with a passion for developer experience
Bonus: experience with browser or mobile instrumentation, mobile development, OpenTelemetry contributions, developer-facing platforms, observability products, session replay, sampling strategies, or user behavior analytics systems

Comp & perks