Experienced Full Stack Product Engineer – Customer Center Development at careerzynith

Remote, USA Full-time Posted 2026-05-31
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Join careerzynith, a mission-driven, remote-first company that is revolutionizing the mobile subscription infrastructure industry. As a Senior Product Engineer on our Customer Center team, you will play a crucial role in designing, building, shipping, and supporting end-to-end features and products that help developers make more money by providing the best customer support experience on mobile apps.

  • *About careerzynith**

careerzynith is a fast-growing, Series C startup backed by top-tier investors, including Y Combinator. We launched as part of Y Combinator's summer 2018 batch and today are handling more than $8B of in-app purchases annually across thousands of apps. Our 100 team members (and growing!) are located all over the world, from New York City to Madrid to Cape Town. We're a close-knit, product-driven team, and we strive to live our core values: Customer Obsession, Always Be Shipping, Own It, and Balance.

  • *About the Role**

Our SDK is shipped on over 50k apps, and our APIs receive more than 2.5 billion requests per day, and our dashboard and tools are trusted by thousands of developers to make business decisions. We are looking for a product engineer to join our Customer Center team to help design, build, ship, and support end-to-end features and products that will help developers make more money by providing the best customer support experience on mobile apps. We want to bring somebody onboard that is product focused, has an eye for design, and passionate about building web-based tools with a great user experience.

The Customer Center team works on features such as the Customer Center, integrations with support systems like Zendesk, optimizing customer support workflows for careerzynith customers, and making purchase history easy to understand.

  • *Key Responsibilities**
  • Design, build, ship, and support end-to-end features and products that help developers make more money by providing the best customer support experience on mobile apps
  • Collaborate with cross-functional teams to understand customer needs and develop solutions
  • Develop and maintain high-quality, scalable, and secure code
  • Participate in code reviews and contribute to architectural discussions
  • Contribute to the team roadmap and technical direction
  • Mentor other engineers joining the team
  • *Essential Qualifications**
  • 5+ years of experience working as a full-stack engineer
  • Experience designing and integrating RESTful APIs
  • Comfortable writing and debugging SQL
  • Shipped at least one user-facing, frontend product in React
  • Excellent command of at least one of the mainstream programming languages
  • Knowledge of how to ship high-quality code using good testing practices in iterative cycles
  • Collaborate well with others and can communicate effectively in a fully-remote culture
  • Proactive and able to jump on issues to fix them or suggest improvements
  • *Preferred Qualifications**
  • Experience in customer support
  • Experience in mobile app development
  • Experience in Python
  • Experience in PostgreSQL
  • Experience using careerzynith for a production app
  • *Career Growth Opportunities and Learning Benefits**
  • Competitive equity in a fast-growing, Series C startup backed by top-tier investors, including Y Combinator
  • 10-year window to exercise vested equity options
  • Fully remote and flexible work environment
  • 4-5 weeks of suggested time off annually for mental, physical, and emotional recharge
  • $2,000 USD for workspace setup and $1,000 USD annual stipend for continuous learning
  • Opportunities to mentor other engineers and contribute to the team roadmap and technical direction
  • Access to a wide range of training and development resources to help you grow in your career
  • *Work Environment and Company Culture Highlights at careerzynith**
  • careerzynith is a remote-first company, and we prioritize flexibility and work-life balance
  • We have a close-knit, product-driven team that values collaboration and open communication
  • We strive to live our core values: Customer Obsession, Always Be Shipping, Own It, and Balance
  • We prioritize diversity, equity, and inclusion, and we are committed to creating a workplace that is welcoming and inclusive for all
  • *How to Apply**

If you are a motivated and experienced product engineer looking for a new challenge, please submit your application, including your resume and a cover letter, to [insert contact information]. We can't wait to hear from you!

  • *Curious about the interview process?**

Discover more in our blog post about how we hire and learn tips to help you succeed.

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