Reflection AI

Open 100d On-siteNorth AmericaLead

last week

Member of Technical Staff - Engineering Lead, Data Acquisition

AI Airflow Data Ingestion Data Lake Data Quality +5 skills

Lead a team building and scaling the data ingestion layer that feeds AI training corpora, including web crawling, extraction pipelines, and data lakes, while staying hands-on with distributed systems and collaborating closely with research teams.

Open 15d On-siteNorth AmericaFull-time

2 weeks ago

Member of Technical Staff - Pre-Training Evals Infra

AI API C++ Distributed Systems GPU +3 skills

Builds the evaluation infrastructure behind Reflection AI's pre-training: designing evaluation APIs and data models, running distributed evaluation workloads across GPU inference, and giving researchers tools to track model quality during training and before release. Core stack is Python, C++, or Rust with distributed systems work.

4 weeks ago

Member of Technical Staff - Shared Services

AI API Backbone.js C++ Data Ingestion +6 skills

Builds and operates Reflection AI's core shared-services platform — developer infrastructure, SRE, and data/compute workflow tooling — that research and production teams rely on. Day-to-day involves designing distributed APIs and services with Go, Rust, C++, gRPC, and Kubernetes, with heavy focus on reliability (SLI/SLOs), scalability, and on-call readiness.

Open 107d On-siteNorth AmericaLead

4 weeks ago

Member of Technical Staff - Engineering Lead, Compute Platform

Lead a team of systems engineers building and operating a Kubernetes-based compute platform distributed across multiple neo-clouds. You’ll hire and grow engineers, guide architectural decisions for multi-cloud scheduling, GPU cluster management, and fault tolerance, and stay hands-on with the technical stack. Tech includes Kubernetes, GPU hardware, NCCL, and high-performance storage like VAST.

AI Cloud GPU Kubernetes

Open 41d On-siteNorth America

last month

MTS, IT Engineer

AI API Authentication Automation Cloud +13 skills

Our Mission Reflection is a research lab making intelligence open and accessible for everyone to use, customize, and build on. We build open models that let anyone control their intelligence and help shape the future…

Open 47d On-siteNorth America

2 months ago

Member of Technical Staff - Multilingual Data

AI Data Pipelines LLM Machine Learning NLP +1 skills

Our Mission Reflection is a research lab making intelligence open and accessible for everyone to use, customize, and build on. We build open models that let anyone control their intelligence and help shape the future…

Open 64d On-siteNorth America

2 months ago

Member of Technical Staff, Data Flywheel

AI LLM Machine Learning Reinforcement Learning

Hands-on technical role on the Data Flywheel team building evaluations, data pipelines, and feedback loops to close the gap between LLM benchmark and real-world performance, spanning evaluation design, data curation, and model training infrastructure.

3 months ago

Member of Technical Staff - Post-Training

AI Distributed Systems LLM Machine Learning Reinforcement Learning

Build and optimize post-training systems for large language models, including data pipelines, reward models, and reinforcement learning to improve reasoning and instruction-following.

Open 93d On-siteNorth America

3 months ago

Member of Technical Staff - Research Software Engineer - Safety Evaluations Infrastructure

AI Containerization Data Pipelines Developer Experience LLM +4 skills

Build and maintain secure, isolated infrastructure for evaluating AI models in high-consequence domains like CBRN and child safety, ensuring reproducibility and compliance with safety standards.

Open 105d On-siteNorth AmericaLead

Member of Technical Staff - Engineering Lead, Shared Services

AI Distributed Systems Kubernetes

Leads a team building and scaling the shared infrastructure (distributed systems, Kubernetes, and service platforms) that supports AI research, training, and production at an open-source AI lab in San Francisco.

Open 105d On-siteNorth AmericaLead

Member of Technical Staff - Engineering Lead, Platform Foundations

AI Bazel BGP CI/CD Cloud +10 skills

Lead a team of infrastructure engineers building the foundational platform layer (cloud, networking, security, developer tooling) that every engineering team at this AI research lab depends on. Combine people leadership with hands-on technical work across Kubernetes, Terraform, multi-cloud infrastructure, and CI/CD systems.

Member of Technical Staff, Data Ingestion Engineer

AI Data Ingestion Data Quality Distributed Systems LLM +1 skills

Our Mission Reflection is a research lab making intelligence open and accessible for everyone to use, customize, and build on. We build open models that let anyone control their intelligence and help shape the future…

Open 131d On-siteNorth America

Member of Technical Staff, Web Crawl Engineer

AI Automation Data Quality Distributed Systems Flink +4 skills

Our Mission Reflection is a research lab making intelligence open and accessible for everyone to use, customize, and build on. We build open models that let anyone control their intelligence and help shape the future…

7 months ago

Member of Technical Staff - Pre-Training Infra

AI DeepSpeed Distributed Training GPU Machine Learning

Our Mission Reflection is a research lab making intelligence open and accessible for everyone to use, customize, and build on. We build open models that let anyone control their intelligence and help shape the future…

7 months ago

Member of Technical Staff - Compute Platform

AI Cloud GPU Kubernetes Observability

Our Mission Reflection is a research lab making intelligence open and accessible for everyone to use, customize, and build on. We build open models that let anyone control their intelligence and help shape the future…

8 months ago

Member of Technical Staff - Applications

AI API Api Design Authentication Data Ingestion +10 skills

Our Mission Reflection is a research lab making intelligence open and accessible for everyone to use, customize, and build on. We build open models that let anyone control their intelligence and help shape the future…

8 months ago

Member of Technical Staff - Platform Foundations

AI Automation AWS Bazel BGP +20 skills

Our Mission Reflection is a research lab making intelligence open and accessible for everyone to use, customize, and build on. We build open models that let anyone control their intelligence and help shape the future…

10 months ago

Member of Technical Staff - Safety

AI LLM Machine Learning Reinforcement Learning RLHF

Our Mission Reflection is a research lab making intelligence open and accessible for everyone to use, customize, and build on. We build open models that let anyone control their intelligence and help shape the future…

10 months ago

Member of Technical Staff, Pre-Training Data Quality Engineer