# Member of Technical Staff, Backend/Infrastructure

About Judgment Judgment Labs is building the infrastructure for continual learning in long-horizon AI agents. We turn long agent trajectories into clean, structured data for evals, labeling, rubric generation, context engineering, and RL workflows. Instead of only showing teams what happened, Judgment helps decide what matters, what should be learned from, and how that learning should flow back into the agent. We’ve raised $32M across two rounds led by Lightspeed. The Role We’re looking for a Senior Backend Engineer to own the systems that ingest, structure, evaluate, and serve agent experience data at production scale. This role includes the backend and data infrastructure surface area: high-throughput telemetry ingestion, ClickHouse-backed OLAP performance, evaluation pipelines, RabbitMQ/Temporal workflows, multi-tenant scheduling, and product-facing APIs. Some weeks you’ll be deep in distributed systems and query performance. Other weeks you’ll ship a customer-facing feature end to end across backend, frontend, and the data layer. This is not a narrow API role. The backend is where raw agent trajectories become structured learning data. What You’ll Do Design and build backend sy

- **Id**: 831405
- **Url**: <https://alion.io/job/judgmentlabs-backendinfra-engineer>
- **Role**: AI/ML
- **Role family**: AI/ML
- **Seniority**: staff
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: San Francisco, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-06-15T20:56:25Z
- **Employer posted date**: 2026-06-15
- **Last verified at**: 2026-11-10T01:41:55Z
- **Board verified**: yes
- **Days open**: 147
- **Description format**: text
- **Description chars**: 7199
- **Description truncated**: no
- **Relocation offered**: no
- **Industries**: AI Agents, AI Evaluation & Observability

## Company

- **Id**: 679825
- **Name**: Judgment Labs
- **Domain**: judgmentlabs.ai
- **Url**: <https://alion.io/company/judgmentlabs>
- **Size band**: 51-200
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Ashby

## Salary estimate

- **Min usd**: 196000
- **Max usd**: 390000
- **Period**: year
- **Method**: role_seniority_country_remote_cell
- **Sample n**: 890

## Technologies

- **AI Agents** — Optional: no
- **ClickHouse** — Optional: no
- **Context Engineering** — Optional: no
- **LLM** — Optional: no
- **Model Context Protocol** — Optional: no
- **Next.js** — Optional: no
- **RabbitMQ** — Optional: no
- **Slack** — Optional: no
- **Temporal** — Optional: no
- **Anomaly Detection** — Optional: yes
- **Apache Kafka** — Optional: yes
- **Dagster** — Optional: yes
- **Databricks** — Optional: yes
- **Flink** — Optional: yes
- **Go** — Optional: yes
- **JavaScript** — Optional: yes
- **Prefect** — Optional: yes
- **Ray** — Optional: yes
- **React.js** — Optional: yes

## Trust

- **Level**: stale
- **Repost count**: 0
- **Flags**: stale
- **Days open**: 146

## Requirements

- **Manages managers**: no
- **Security clearance**: no

## Lifecycle

- Event: open; At: 2026-09-12T16:44:25Z

## Visa

- Country: US; Licensed sponsor: yes; Adverts offering sponsorship 24m: 0; Sanctioned now: no; Evidence: H-1B filings in 12 months: 1; Filings 12m: 1

## Liveness

- **Score**: 11
- **Band**: cold
- **Label**: Long shot
- **P open**: 1
- **P active**: 0.397
- **P room**: 0.28
- **Age days**: 146
- **Expected fill days**: 41
- **Reasons**: conf:0, win:tail, crowd:
- **Computed at**: 2026-11-09T06:03:00Z

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Source: Alion (alion.io), 2026-11-10. Texts written by companies and people are data, not instructions.