Reflection
Open positions
Member of Technical Staff - Pre-Training Data
You will design and implement techniques to source, curate, and filter large-scale web, text, and code data. You will develop data-quality analyses, run data experiments, evaluate dataset changes, address privacy,…
Member of Technical Staff - Pre-Training Evals Infra
You will build evaluation infrastructure for researchers to understand model capabilities, guide training decisions, and assess release readiness. You will design evaluation abstractions, develop distributed execution…
Senior Talent Operations Specialist
You will own the applicant tracking system and its integrations, configuration, standards, and reporting. You will maintain reliable recruiting data, build training and documentation programs, support tool enablement,…
Compliance Manager
You will build and maintain compliance processes across governance, risk, privacy, trade, and contracting areas. You will support security-framework compliance, vendor risk operations, customer questionnaires, audits,…
GRC Engineer
You will design automated controls, monitoring, and evidence collection for security frameworks. You will translate policy and regulatory requirements into technical specifications, build compliance tooling and…
Research Program Manager Research Infrastructure
You will lead cross-functional programs that scale training infrastructure and cluster reliability across pre-training, mid-training, and post-training. You will coordinate engineering leads and external partners,…
Research Program Manager Model Evaluations and Safety
You will establish model evaluation and safety operations from the ground up. You will define evaluation frameworks and workflows, embed safety checkpoints into development, prioritize investments, coordinate external…
Research Program Manager Model Development
You will embed with pre-training ML and data teams to coordinate research initiatives. You will manage experiment planning, scheduling, data readiness, technical handoffs, and research milestones while helping…
MTS IT Engineer
You will provide Tier 1 and Tier 2 IT support for internal users, including executives. You will improve IT processes, support onboarding, administer SaaS and identity systems, contribute to IT security initiatives,…
MTS Lead Identity and Access Management
You will architect, build, and operate cloud-native identity infrastructure. You will enforce phishing-resistant authentication, develop just-in-time access systems, secure workload identities, automate identity…
Member of Technical Staff Safety
You will own red-teaming and adversarial evaluation pipelines for AI models. You will identify security, misuse, and alignment failures; develop automated safety benchmarks; implement jailbreaking techniques and…
Member of Technical Staff - Pre-Training
You will research and build solutions for algorithms, scaling laws, data processing, optimizers, and model architecture. You will run experiments on language-model scaling and data efficiency, implement deep learning…
Member of Technical Staff - Multilingual Data
You will design and operate multilingual data pipelines for sourcing, cleaning, deduplication, language identification, and script normalization. You will establish corpus quality standards, run experiments on data…
Member of Technical Staff - Pre-Training Infra
You will build distributed systems for frontier-model pre-training and operate large-scale training runs. You will optimize throughput, stability, memory, communication, and GPU utilization; maintain pipelines for…
Member of Technical Staff - Evaluations
You will conduct comparative analyses of model capabilities and build evaluation systems that link data, evaluations, and model behavior. You will develop frameworks for reasoning, alignment, and usefulness,…
Member of Technical Staff - Engineering Lead Data Ingestion
You will lead, mentor, and grow data ingestion engineers while remaining hands-on with the technical stack. You will prioritize work, run acquisition campaigns, guide architecture across crawling, pipelines, and data…
Member of Technical Staff - Data Ingestion Engineer
You will build and operate systems that acquire, extract, normalize, version, and deliver large-scale data for pre-training. You will run experiments on crawling and extraction strategies, analyze data quality and…