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Reflection

43 jobs

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43 jobs Posted Sort

Research Program Manager Research Infrastructure

New On-siteNorth America, UK

A senior technical program manager role at Reflection AI that owns cross-functional programs scaling AI training infrastructure and cluster reliability across pre-, mid-, and post-training. Day to day: coordinating engineers and external partners, triaging incidents, and building durable processes — grounded in knowledge of distributed training, GPU clusters, networking, and storage.

Distributed Training Networking Program Management Stakeholder Management

Research Program Manager Model Evaluations and Safety

New On-siteNorth America, UK

Reflection is hiring a Research Program Manager to stand up its model evaluation and safety operations from scratch — defining eval frameworks and safety workflows, embedding safety checkpoints into model development and releases, and coordinating external safety partners. It is a technical program-management role at an AI research company, not a hands-on coding job.

AI Data Pipelines Machine Learning Model Evaluation Program Management

Research Program Manager Model Development

New On-siteNorth America, UK

A research program manager who embeds with pre-training ML and data teams at an AI model developer, coordinating experiment planning, run scheduling, data readiness, checkpoint handoffs, and research milestones across training and infrastructure teams, while advising research leadership on technical tradeoffs.

Machine Learning Program Management Stakeholder Management

Senior Enterprise Risk Operations Specialist

New On-siteNorth America, UKSenior

You will operate audit-ready risk programs across commercial support, third-party risk, controls assurance, and issue management. You will assess vendors and customers, validate controls, manage remediation and…

Go-to-Market Risk Assessment

MTS IT Engineer

New On-siteNorth America

Provides Tier 1 and Tier 2 IT support for internal users, including white-glove executive support, employee onboarding, SaaS and identity administration (Okta, Rippling), and IT security initiatives like hardware security keys and device posture. Works across macOS/Windows, MDM tooling, and platforms like Google Workspace, Slack, Jira, and Linear.

Jamf Jira macOS MDM Networking +4 skills

MTS Lead Identity and Access Management

New On-siteNorth AmericaLead

Reflection is hiring a lead identity and access management engineer to architect, build, and operate cloud-native IAM: phishing-resistant authentication, just-in-time credentials for GPU clusters, workload identity, and authorization-as-code across AWS, GCP, and Kubernetes. Requires 15+ years in identity/security or infrastructure engineering and coding in Go, Python, or Rust.

API Authentication AWS CI/CD Cloud +16 skills

Member of Technical Staff Security Engineer

New On-siteNorth America

Security engineer at Reflection who builds the company's application-security program: implementing security controls for AI agents, defining software supply-chain security, maintaining threat models, leading pentesting, and wiring SAST and a secure SDLC into CI/CD. Core stack includes Python or Golang, Kubernetes, and AWS or GCP.

Agentic AI AI AWS CI/CD GCP +7 skills

Member of Technical Staff Infrastructure Security

New On-siteNorth America

Secures Reflection's multi-cloud Kubernetes and cloud environments day to day: auditing and hardening clusters, unifying authentication and authorization policy, automating security posture monitoring, protecting container workloads, and building incident-response tooling. Core stack includes Kubernetes/GKE, Rancher, Helm, ArgoCD, Terraform/Pulumi, GCP/AWS/Azure, and Python or Go.

Argo CD Authentication AWS Azure CI/CD +11 skills

Member of Technical Staff Safety

New On-siteNorth America, UK

Owns red-teaming and adversarial evaluation pipelines for Reflection's AI models — probing for security, misuse, and alignment failures, implementing jailbreaks and defenses, building automated safety benchmarks, and validating model releases against risk thresholds. Core focus: LLM safety and ML evaluation systems.

AI LLM Machine Learning

Member of Technical Staff Research Software Engineer Safety Evaluations Infrastructure

New On-siteNorth America, UK

Designs, builds, and owns secure sandboxed infrastructure for sensitive AI model evaluations at Reflection, including controlled data pipelines, access controls, audit logging, and evaluation orchestration tooling, with production-quality Python as the core technology.

AI Data Pipelines Developer Experience Python RBAC +1 skills

Member of Technical Staff - Pre-Training

New On-siteNorth America, UK

Research-focused engineer on Reflection's pre-training team: designs and runs experiments on language-model scaling, data efficiency, optimizers, and model architecture; implements deep learning methods, leads small research projects, and optimizes distributed training infrastructure, primarily using Python and PyTorch.

Deep Learning Distributed Training ETL Machine Learning Python +1 skills

Member of Technical Staff - Pre-Training Infra

New On-siteNorth America, UK

Builds and operates distributed training infrastructure for frontier-model pre-training across thousands of GPUs, optimizing throughput, stability, memory, and GPU utilization while maintaining dataset/checkpointing pipelines and debugging bottlenecks. Core tech includes Megatron, DeepSpeed, NCCL, and model parallelism.

Data Pipelines DeepSpeed Distributed Systems Distributed Training Machine Learning

Member of Technical Staff - Multilingual Data

New On-siteNorth America, UK

Reflection is hiring a Member of Technical Staff for Multilingual Data to design and operate pipelines for sourcing, cleaning, deduplicating, and normalizing multilingual corpora, define corpus quality standards, run data-efficiency experiments, and build language-specific evaluations and diagnostics to improve multilingual model capability. Core skills include software engineering, distributed co

Data Pipelines Distributed Computing

Member of Technical Staff - Mid-Training Infra

New On-siteNorth America, UK

Design, build, and operate large-scale GPU infrastructure for high-throughput inference and mid-training workloads at an AI lab. Day-to-day work spans distributed systems for synthetic data generation and reinforcement learning, optimizing model execution and GPU utilization (SGLang, Megatron, kernel optimization), and resolving performance bottlenecks across runtimes, networking, and distributed

Distributed Systems Model Evaluation Networking Reinforcement Learning

Member of Technical Staff - Evaluations

New On-siteNorth America, UK

Conducts comparative analyses of LLM capabilities and builds evaluation systems that link data, evaluations, and model behavior at Reflection — developing generalizable frameworks for reasoning, alignment, and usefulness using synthetic evaluations, human feedback, and real-world interaction data, in close collaboration with research teams.

Member of Technical Staff - Web Crawl Engineer

New On-siteNorth America

Builds and operates web-scale crawling infrastructure: URL discovery, prioritization, scheduling, content extraction, and dataset delivery. Works with distributed systems like Ray, Spark, Beam, or Flink, plus HTML parsing/browser rendering, and builds observability and reliability tooling for petabyte-scale crawl pipelines.

Automation Distributed Systems Flink HTML Observability +1 skills

Member of Technical Staff - Engineering Lead Data Ingestion

New On-siteNorth America, UKLead

Engineering lead for data ingestion at Reflection: build and mentor a team of data ingestion engineers while staying hands-on, leading web crawling, ingestion pipelines, and data-lake delivery at petabyte scale. Core stack includes Ray, Beam, Spark, Airflow, Prefect, Parquet, JSONL, and WARC, with work tied to LLM training impact.

Airflow Data Ingestion Data Lake Data Quality LLM +3 skills

Member of Technical Staff - Data Quality Engineer Pre-training

New On-siteNorth America, UK

Reflection is hiring a Data Quality Engineer for LLM pre-training to define measurable data-quality standards, build automated QA pipelines and human-in-the-loop checks, and monitor quality trends using Python and ML/LLM workflows. On-site roles in San Francisco, New York, or London.

Acceptance Criteria Data Pipelines Data Quality LLM Machine Learning +1 skills

Member of Technical Staff - Data Quality Engineer Post-training

New On-siteNorth America, UK

Reflection AI is hiring a Data Quality Engineer for its post-training team. Day to day, this person defines measurable data-quality standards for LLM training and evaluation, builds automated QA pipelines in Python over large datasets, gives feedback to external data vendors, and monitors quality trends to improve acceptance criteria.

Acceptance Criteria Agentic AI Data Pipelines Data Quality LLM +2 skills

Member of Technical Staff - Data Ingestion Engineer

New On-siteNorth America, UK

Builds and operates large-scale data ingestion systems (crawling, extraction, normalization, versioning) that feed Reflection's LLM pre-training, running experiments on data quality and developing specialized crawlers. Core technologies include distributed data frameworks like Ray, Beam, or Spark.

Data Ingestion Data Quality LLM Spark