Full Stack Engineer, Growth

Triple Whale; New York (NY); On-site; USD 110,000 - 160,000; Full time

Job summary

Jobtailor in New York is seeking a frontend engineer focused on growth experimentation to drive self-serve conversions and activation milestones.

You will own feature flags, A/B testing, and analytics integration while delivering reliable UI in critical paths and collaborating with product and data teams.

Qualifications

• 2-4 years of professional full-stack engineering with a frontend emphasis.
• Experience building UI in critical path of user conversion or monetization.
• Hands-on experience with feature flagging and A/B testing infrastructure.
• Comfort with analytics instrumentation and event tracking.
• Experience using AI tools as part of development workflow.
• Ability to move fast and ship iteratively with high code quality and collaboration.

Responsibilities

• Build the frontend experiences that drive self‑serve conversion: upgrade modals, plan comparison views, usage limit messaging, gating experiences, and in‑product CTAs.
• Own the frontend side of the growth experimentation stack including implementing feature flags, building A/B test variants, and instrumenting events for analytics.
• Build the in‑product experiences that help new and existing customers hit activation milestones faster: guided flows, tooltips, checklists, contextual nudges, and feature education moments.
• Ensure clean, reliable event tracking across the growth surfaces you build so the team can measure activation, conversion, and feature adoption accurately.
• Contribute to core product work when priorities call for it.

Skills

React

Frontend engineering

Full-stack with Node.js/Python

A/B testing & feature flags

Analytics instrumentation

AI tooling integration

Tools

LaunchDarkly

Amplitude

Mixpanel

Node.js

Python

Job description

Responsibilities

• Build the frontend experiences that drive self‑serve conversion: upgrade modals, plan comparison views, usage limit messaging, gating experiences, and in‑product CTAs.
• Own the frontend side of the growth experimentation stack including implementing feature flags, building A/B test variants, and instrumenting events for analytics.
• Build the in‑product experiences that help new and existing customers hit activation milestones faster: guided flows, tooltips, checklists, contextual nudges, and feature education moments.
• Ensure clean, reliable event tracking across the growth surfaces you build so the team can measure activation, conversion, and feature adoption accurately.
• Contribute to core product work when priorities call for it.

Requirements

• 2‑4 years of professional full‑stack engineering experience with a frontend emphasis, primarily in React with backend experience in Node.js, Python, or similar.
• Experience building UI that sits in the critical path of user conversion or monetization (upgrade flows, checkout, onboarding, paywalls, or similar).
• Hands‑on experience with feature flagging and A/B testing infrastructure, whether through third‑party tools (LaunchDarkly, Statsig, Optimizely) or custom‑built systems.
• Comfort with analytics instrumentation and event tracking (Segment, Amplitude, Mixpanel, or similar).
• Experience using AI tools (Cursor, Claude, Copilot, or similar) as a core part of your development workflow, not just occasionally.
• Ability to move fast and ship iteratively without sacrificing code quality in the areas that matter.
• Strong collaboration skills, especially working in a tight loop with product and using data to inform what you build next.