Implementation Manager (Hybrid) - YC W23

About Numeral

Numeral is building the automation backbone for internet commerce — starting with the painful world of sales tax compliance. We handle everything from registration to remittance, delivering a white-glove service so e-commerce businesses can stay laser-focused on what they do best: growing their products, customers, and teams.

We’re one of the fastest-growing companies from Y Combinator’s W23 batch, backed by top-tier investors including Benchmark Capital. Our team has deep roots from the early days at Stripe, Airbnb, Notion, and other breakout companies — and now we’re bringing that same level of craft, speed, and ambition to a space that’s long overdue for reinvention.

Numeral is small but mighty. Growth is already borderline unmanageable — which means every hire we make now will directly shape the trajectory of the company. If you’re excited about joining as an early team member and want the kind of ownership that defines careers, we want to meet you.

Mission

Running an online business today means wearing a thousand hats — most of them not the reason founders started their company. Our mission is to eliminate the administrative and accounting burdens that distract businesses from doing what they love.

We’ve already helped hundreds of merchants avoid the headache of building giant finance teams just to manage tax compliance. Tomorrow, we’re scaling that impact even further: building the automation layer that lets internet businesses stay nimble, compliant, and future-proof.

About the role:

We’re looking for an Implementation Manager to join our growing team and build the onboarding engine that powers our customer success. You’ll be the face of Numeral to our newest clients, guiding them from signed contract to full deployment. Your role blends client engagement, project management, and operational execution — ensuring customers launch quickly and confidently on our platform.

This is a high-impact, cross-functional role. You’ll work closely with product, engineering, and customer experience teams, and help design scalable playbooks that can support rapid growth. You thrive in ambiguity, bring order to chaos, and love building processes from 0 to 1.

Responsibilities:

• Own the end-to-end onboarding experience for new clients, ensuring a smooth and timely implementation with Numeral's platform.
• Manage a sizable book of business of clients at various stages of setup and go-live.
• Serve as the primary point of contact during onboarding, answering questions, solving problems, and guiding clients through setup.
• Translate client needs and workflows into internal requirements that inform product and operations
• Configure customer accounts, troubleshoot technical issues, and guide them through integration best practices.
• Partner with engineering and product teams to resolve client challenges and influence roadmap improvements.
• Build scalable implementation playbooks, documentation, and help center resources.
• Identify and address downstream impacts of onboarding decisions to ensure long-term system health.
• Continuously improve implementation processes for speed, efficiency, and customer satisfaction.

Qualifications:

• 2+ years of experience in implementation, onboarding, customer success, consulting, operations roles or related roles
• Strong project management skills with the ability to juggle multiple client projects and high bias for action.
• Ability to navigate technical systems and explain them to non-technical users with empathy
• Excellent problem-solving and communication skills — able to translate between technical and non-technical stakeholders.
• Comfortable working cross-functionally in a fast-paced, startup environment.

Bonus Points For:

• Experience with prompt writing or improving operational workflows using AI tools.
• Prior experience building client-facing documentation or help center resources.
• Experience in early-stage startup environments.
• Experience in fintech, SaaS, or tax-related industries.
• Familiarity with spreadsheets, SQL, or basic data workflows

Why Join Us?

• Be a core builder in an ambitious, globally minded startup.
• Learn hands-on how to scale international compliance systems.
• Work across functions and with leadership early in your career.
• Make a visible impact immediately through enablement and operational design.
• Enjoy a flexible, remote-first culture with strong mentorship and ownership opportunities.