Senior Fullstack Engineer – Growth

Overflow

Senior Fullstack Engineer developing key features for a fintech SaaS platform aimed at boosting charitable giving. Collaborating with cross-functional teams on innovative product-led growth initiatives.

Posted 7/14/2026full-timeRemote • 🇺🇸 United StatesSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in fullstack software engineering with a focus on building scalable RESTful APIs and responsive frontend applications using React and TypeScript. Strong leadership in technical initiatives and a commitment to delivering high-quality user experiences through collaboration and architectural improvements.

Highest-signal resume keywords

Fullstack Software EngineeringReactTypeScriptNode.jsRESTful API Design

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Hard Skills

Fullstack Software EngineeringReactTypeScriptNode.jsRESTful API DesignRelational Database DesignClean Code PracticesArchitectural ImprovementsTechnical Debt ManagementUser-Centric Design

Soft Skills

MentoringCollaborationAccountability

Industry Keywords

E-CommerceCustomer Self-OnboardingSubscription Plan UpgradesProduct-Led GrowthConversion Funnels

Tech Stack

Tools & technologies

JavaScriptNode.jsReactTypeScript

About the role

Key responsibilities & impact

Architect and build robust, end-to-end features that enable intuitive customer self-onboarding, seamless subscription plan upgrades, and highly optimized e-commerce checkout flows
Own complete features from database schema and RESTful API design (Node.js) through to a polished, highly responsive frontend implementation (React/TypeScript)
Write clean, well-tested, and maintainable code
Partner closely with Product, Design, and Data to iterate quickly and deliver high-quality user experiences
Identify technical debt and contribute to architectural improvements that enhance reliability, scalability, and speed
Mentor junior engineers and participate in on-call rotations to ensure high availability of systems

Requirements

What you’ll need

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
A 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.

Benefits

Comp & perks

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 to support personal well-being
Team retreats and intentional in-person gatherings throughout the year