Member of Technical Staff - Post-Training
San Francisco, CA • FullTime
Posted 1mo ago
Remote Work Policy
On-site
Employment Type
FullTime
Categories
Applied AI Engineer
About the job
Reflection is a research lab dedicated to making intelligence open and accessible for everyone to use, customize, and build on. We are building open models that empower individuals to control their intelligence and shape the future of AI. As a Member of Technical Staff - Post-Training, you will play a crucial role in transforming powerful pre-trained models into aligned and general agents. This position involves driving research and engineering initiatives at the forefront of post-training techniques, from data curation to large-scale optimization, and contributing to the advancement of large model reasoning and instruction following capabilities.
Responsibilities
- Build systems to transform pre-trained models into aligned and general agents.
- Drive research and engineering for post-training, including data curation and large-scale optimization.
- Develop data generation pipelines, reward models, reinforcement learning algorithms, and inference-time scaling techniques.
- Collaborate with pre-training and post-training teams to enhance model capabilities.
- Contribute to understanding how large models learn to reason, follow instructions, and improve via reinforcement learning.
Requirements
- Deep understanding of machine learning fundamentals.
- Practical experience with large-scale LLM training.
- Strong engineering skills, comfortable with complex ML codebases and distributed systems.
- Experience improving model behavior through data, reward modeling, or RL techniques.
- Proven ability to own ambitious research or engineering agendas leading to measurable model improvements.
- Ability to work fluidly across research and infrastructure boundaries.
- Strong communication and collaboration skills.
- Passion for advancing the frontier of intelligence.
Benefits
- Top-tier compensation (salary and equity).
- Stock options.
- Comprehensive health, dental, vision, and life insurance.
- Annual wellness allowance.
- Provided lunch and dinner in the office.
- 22 weeks paid parental leave.
- Unlimited paid time off in the U.S.
- 30 days paid time off in the U.K.
- Visa sponsorship support.
- Regular off-sites, happy hours, and team celebrations.