Horizon Stack is a fast-growing technology company building operations tools for modern teams. We are fully distributed and passionate about solving hard problems at scale. As a Senior Project Manager, you will play a key role in shaping our culture from anywhere in the world.

What You'll Do:
- Coordinate with vendors, partners, and external stakeholders
- Own and optimize end-to-end operational processes and workflows
- Identify bottlenecks and implement scalable process improvements
- Manage cross-functional project delivery from planning to completion
- Document processes and ensure knowledge is shared across teams
- Facilitate agile ceremonies and keep teams aligned on priorities
- Support resource planning and capacity management initiatives

What We're Looking For:
- Excellent communication and stakeholder management skills
- Proven track record of delivering complex, high-impact projects
- Strong system design and architectural thinking
- Experience mentoring junior and mid-level team members

What We Offer:
- Unlimited PTO and company-wide recharge days
- Flexible hours — we trust you to manage your time
- Fully remote — work from anywhere in the world
- Company-wide team retreats twice per year
- Annual learning and development budget ($1,500+)

To apply, send your resume and a short note about why you are excited about this role. We review every application and respond within 5 business days.