# Senior Fullstack Engineer - Observability Real User Monitoring (RUM) | US | Remote
**Company:** [Grafana Labs](https://hotfix.jobs/companies/grafana-labs)
**Location:** Remote
**Salary:** $154K-$185K
**Experience:** 5+ years
**Skills:** Go, TypeScript, React, Kubernetes, Docker, AWS, GCP, Azure, ClickHouse, OpenTelemetry, Kafka, Postgres, Cassandra
**Posted:** 2026-04-22
> Build fullstack features for Real User Monitoring (RUM) in observability platform, handling high-volume telemetry data ingestion, storage, querying, and visualization. Requires 5+ years fullstack experience with strong backend (Go preferred), distributed systems, and observability concepts.
## Job Description
## What you’ll be doing

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

## What makes you a great fit

- 5+ years of fullstack engineering experience with strong backend fundamentals
- Backend experience (**Go** is preferred) and frontend experience, we use **TypeScript** and **React**
- Experience building or operating distributed systems in production (e.g., **Kafka**, **WarpStream**, **ClickHouse**, **Cassandra**, **Postgres**)
- Familiarity with cloud-native systems (**Docker**, **Kubernetes**, **AWS**, **GCP**, **Azure**)
- Experience working with high-throughput, high-cardinality data (logs, metrics, traces, 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, debugging interfaces)
- Familiarity with observability concepts (traces, logs, metrics) 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 / nice-to-have

- Experience with browser or mobile instrumentation (RUM SDKs, telemetry collection).
- Mobile development experience (iOS or Android) or familiarity with mobile performance and telemetry.
- Contributions to **OpenTelemetry** or other observability OSS.
- Experience building developer-facing platforms or observability products.
- Familiarity with session replay, sampling strategies, or user behavior analytics systems.

**Compensation range: $154,445 - $185,334 USD.**
**Apply:** https://hotfix.jobs/jobs/senior-fullstack-engineer-observability-real-user-monitoring-rum-us-remote-at-70589674-f191-4fda-8cd1-cfa3f8ab469c
**Canonical:** https://hotfix.jobs/jobs/senior-fullstack-engineer-observability-real-user-monitoring-rum-us-remote-at-70589674-f191-4fda-8cd1-cfa3f8ab469c