Senior Fullstack Engineer - Growth

The role

You will drive Product-Led Growth by architecting and building features for customer self-onboarding, subscription upgrades, and e-commerce checkout flows. You will own features from database schema and RESTful API design to frontend implementation.

What you will do

• Architect and build features for customer self-onboarding, subscription plan upgrades, and e-commerce checkout flows.
• Own complete features from database schema and RESTful API design to frontend implementation.
• Write clean, well-tested, and maintainable code.
• Contribute to engineering standards and rigorous code reviews.
• Partner with Product, Design, and Data to run experiments and deliver user experiences.
• Identify technical debt and contribute to architectural improvements.
• Mentor junior engineers.
• Participate in on-call rotations.

Required qualifications

• 5+ years of fullstack software engineering experience
• Strong proficiency in React, TypeScript, and Node.js (or similar modern backend technologies)
• Deep experience designing and building scalable RESTful APIs and working with relational databases
• Strong product sense and an understanding of product-led growth mechanics, conversion funnels, and user-centric design
• Demonstrated ability to lead technical initiatives, make sound architectural decisions, and operate with a strong accountability mindset

Nice to have

• Hands-on experience integrating with billing and subscription platforms or building custom e-commerce checkout experiences
• Experience in fintech, payments infrastructure, or donation platforms
• Experience at a Series B or growth-stage startup

Benefits

• Competitive base salary with equity eligibility
• Medical, dental, and vision coverage for employees and dependents
• Generous paid time off and company holidays
• Paid parental leave
• 401(k) retirement plan
• Dedicated mental health and therapy stipend
• Team retreats and intentional in-person gatherings throughout the year

About the company

Overflow is a Series C, growth-stage technology company that is a vertical fintech and SaaS platform. They build infrastructure to make generosity frictionless for churches, nonprofits, and mission-driven institutions.