HR Business Partner
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Overview
Job Description
Our Mission
Reflection’s mission is to build open superintelligence and make it accessible to all.
We’re developing open weight models for individuals, agents, enterprises, and even nation states. Our team of AI researchers and company builders come from DeepMind, OpenAI, Google Brain, Meta, Character.AI, Anthropic and beyond.
About the Role
The HR Business Partner will serve as a strategic advisor to functional leaders across both technical and non-technical teams. This role is responsible for driving organizational effectiveness, supporting high-performance standards, and guiding leaders through complex people decisions.
This foundational role will help build the HRBP function from the ground up: establishing core management toolkits, strengthening org design rigor, advising on performance and flight risk, and acting as connective tissue between leaders and the broader People team. You’ll help ensure we scale with intentionality, high performance, and sound judgment, while laying the groundwork for future org growth.
What You’ll Do
Strategic Leadership Partnership
Partner with leaders to strengthen team performance and organizational health
Advise on org design, role clarity, and team structure
Support workforce planning aligned to business objectives
Coach managers on feedback, accountability, and leadership effectiveness
Guide leaders through change and scaling challenges
Performance & Talent Management
Coach managers through performance reviews, calibration, and promotion decisions
Uphold high performance standards and consistency across teams
Support talent planning and succession conversations
Guide performance improvement and complex people decisions
Ensure decisions are thoughtful, consistent, and well-documented
Build scalable frameworks for separation and performance management practices
Building for Scale
Identify gaps in people practices and implement pragmatic, scalable solutions
Partner cross-functionally to evolve people frameworks as the company grows
What You Bring
7+ years of experience in an HR Business Partner role, ideally in high-growth or technology environments
Strong experience with employee relations and workplace investigations
Experience advising senior leaders and influencing decision-making
Demonstrated ability to build HR frameworks in scaling organizations
Deep knowledge of US employment practices; UK exposure is a plus
Strong judgment, discretion, and ability to navigate ambiguity
Ability to balance business needs with a fair and consistent employee experience
What We Offer:
We believe that to build superintelligence that is truly open, you need to start at the foundation. Joining Reflection means building from the ground up as part of a small talent-dense team. You will help define our future as a company, and help define the frontier of open foundational models.
We want you to do the most impactful work of your career with the confidence that you and the people you care about most are supported.
Top-tier compensation: Salary and equity structured to recognize and retain the best talent globally.
Health & wellness: Comprehensive medical, dental, vision, life, and disability insurance.
Life & family: Fully paid parental leave for all new parents, including adoptive and surrogate journeys. Financial support for family planning.
Benefits & balance: paid time off when you need it, relocation support, and more perks that optimize your time.
Opportunities to connect with teammates: lunch and dinner are provided daily. We have regular off-sites and team celebrations.
Automate your job search with Sonara.
Submit 10x as many applications with less effort than one manual application.
