Senior Human Resources Business Partner (HRBP)

Axion•New York, NY

About The Position

Axion is looking for a Senior HR Business Partner to help shape the next chapter of our growth by building the foundational people infrastructure that will power our team through scale. This is a high-impact, hands-on role for a builder who thrives in fast-moving, unstructured environments and is eager to design programs that don’t yet exist. You’ll work directly with senior leaders across Product, Engineering, GTM, and Operations to establish core people systems and management practices—from the first formal performance review cycle to manager training, goal-setting, and feedback rituals. Your work will ensure our culture scales intentionally as our company grows. This is an opportunity to make a lasting mark by creating the frameworks, processes, and leadership capabilities that define how Axion operates and leads.

Requirements

Experience operating as a People Partner or HRBP supporting multiple departments or leadership teams within a high-growth, fast-changing environment.
Proven success building or formalizing people programs from scratch , such as performance reviews, leveling frameworks, or management training.
Strong track record of coaching managers through sensitive employee relations, performance, or organizational challenges.
Demonstrated ability to drive clarity and structure in environments with little precedent or process.
Experience collaborating cross-functionally with Recruiting, Finance, and Operations on organizational design and compensation reviews.
Adept at using data and feedback to inform strategic people decisions and measure program effectiveness.

Nice To Haves

Played a key role in helping a company scale from ~75 to 250+ employees.
Experience building or modernizing performance management, feedback, or promotion processes.
Exposure to technical and engineering teams , understanding their unique rhythms and leadership challenges.
Comfort operating as the first or only embedded HRBP in a scaling organization.
Based in NYC or open to working from our Williamsburg HQ at least 3 days/week.

Responsibilities

Act as a trusted advisor and coach to leaders across Product, Engineering, GTM, and Operations, helping them navigate performance, feedback, and team development challenges.
Partner with the executive team to shape Axion’s long-term people strategy — advising on culture, engagement, retention, and leadership effectiveness.
Design and implement foundational people programs — including performance management, manager enablement, leveling frameworks, and feedback systems — to support scale.
Establish consistent management rhythms such as goal setting, 1:1 frameworks, and review cycles that drive accountability and growth.
Own the end-to-end employee experience, from onboarding through offboarding, ensuring every touchpoint reflects Axion’s values and culture.
Build scalable feedback loops and employee listening mechanisms (e.g., pulse surveys, stay interviews, exit feedback) that turn insight into action.
Develop playbooks, training content, and toolkits that strengthen manager capability and drive consistency across teams.
Collaborate cross-functionally with Recruiting, Finance, and Operations on workforce planning, compensation alignment, and organizational initiatives.
Use people data and qualitative insights to identify trends, flag leadership risks, and inform proactive retention and engagement strategies.