How to apply for Product Manager

About Klir

Klir is a mission-driven startup building an integrated water management platform to ensure safer, compliant, and ecologically-friendly utility operations. If you want to work on a product that directly impacts water safety and environmental sustainability, Klir offers a unique blend of tech innovation and social good.

About the role

As Product Manager for Klir Connect's payment workflows, you'll own the roadmap for invoicing, payment processing, and integration with Klir Core. This role is high-impact because you'll shape the financial experience for both utilities and end-users (testers, haulers), enabling seamless transactions and future marketplace features.

A typical day

Your day might start with a customer discovery call with a backflow tester to understand friction in the current payment process. Then you'll write a one-pager for a new invoicing feature, sync with engineering on Stripe integration requirements, and end the day reviewing analytics on payment completion rates with the finance team.

Who Klir is looking for

• Comfortable building products from scratch in ambiguous environments—you thrive when there's no playbook and can define the vision from zero.
• Has payments or fintech literacy: understands payment gateways (e.g., Stripe), convenience fees, reconciliation, and invoicing flows.
• Thinks in two-sided markets: can balance the needs of utilities (compliance, fee collection) with individual users (testers, haulers) for a seamless experience.
• Strong communicator: writes clear one-pagers, runs effective customer discovery interviews, and can brief executives concisely.

Tips for this application

• In your resume and cover letter, highlight any experience launching a product from scratch—especially if it involved payments or multi-sided platforms.
• Show specific fintech knowledge: mention familiarity with Stripe APIs, payment reconciliation, or convenience-fee models.
• Demonstrate two-sided thinking by describing a past project where you balanced conflicting user needs (e.g., enterprise vs. individual customers).
• Include examples of customer discovery work—how you identified user pain points and translated them into product requirements.
• Tailor your portfolio or case studies to include one-pagers or product specs you've written; Klir values clear, concise written communication.

What to cover in your cover letter

['Emphasize your experience building products in ambiguous, zero-to-one environments—Klir is early-stage and needs self-starters.', 'Highlight any payments or fintech background, even if tangential (e.g., building subscription billing, integrating Stripe).', 'Show your ability to conduct customer discovery and synthesize insights into a product roadmap.', 'Express genuine interest in water sustainability and how technology can improve utility operations.']

Research before applying

• Read Klir's website and blog to understand their current product suite (Klir Core, Klir Connect) and their mission around water safety.
• Look into the backflow testing industry—understand the current pain points for testers, haulers, and utilities in submitting reports and payments.
• Research Stripe's payment APIs, especially their Connect platform for marketplace-style payments, as this may be relevant to future features.
• Check Klir's LinkedIn or Crunchbase for recent funding, team size, and company culture to tailor your application.

Likely interview topics

Based on the job description, expect questions about:

• Walk me through how you would design the payment flow for a backflow tester submitting a report and paying a convenience fee.
• How would you prioritize features for the initial launch of Klir Connect's payment workflows?
• Describe a time you had to balance the needs of two different user groups (e.g., utilities vs. testers). How did you decide?
• How would you evaluate the success of a new payment feature? What metrics would you track?
• Explain how you would approach integrating Stripe for the first time, including considerations for reconciliation and error handling.

Common mistakes to avoid

• Don't apply with a generic product manager resume—make sure to highlight payments or fintech experience, even if it's a side project.
• Avoid vague statements like 'I love building products'—be specific about zero-to-one launches and ambiguous environments.
• Don't neglect the two-sided nature of the role; failing to mention how you handle conflicting user needs is a missed opportunity.