Founding Full-Stack Engineer

FitNext Co.

Founding Full-Stack Engineer

San Francisco, CA
Full Time
Paid
  • Responsibilities

    Founding Full-Stack Engineer

    Industry: Sales Technology | Generative AI Stage: Seed | Scaling to $1M+ ARR

    Salary: Competitive, based on experience

    Location: San Francisco, USA (On-site)

    Job Type: Full-Time

    About The Company

    The company is the world's first unified revenue acceleration platform built natively on generative AI. We help sales teams at companies like Lenovo and Redpanda ramp faster through AI-powered training and coaching, instantly surface and personalize sales collateral, and engage buyers through the industry's first AI Sales Room.

    We've raised $2.7M in seed funding from top-tier investors including Y Combinator, Formus Capital, Soma, Pioneer Fund, and TechNexus. As we scale beyond $1M+ ARR , we're building our founding team and looking for engineers excited to shape both the product and the company from the ground up

    The Role

    We're hiring a Founding Full-Stack Engineer as one of our first engineering hires. You'll have a major influence on product direction, engineering culture, and company growth , working directly with leadership to define how our platform evolves.

    This is a high-impact role with real ownership over customer-facing, AI-powered features.

    What You'll Do

    • Build high-performance, responsive customer-facing features using Python, React, Redux, and TypeScript

    • Design and implement LLM-powered features across text, image, video, and audio

    • Collaborate closely with backend engineers on integrations and architecture

    • Develop APIs and frontend integrations for scalable, AI-driven workflows

    • Work directly with customer feedback to continuously improve UX

    • Own features end-to-end, from concept to production

    What We're Looking For

    Required Qualifications

    • 3+ years of experience in full-stack software development

    • Strong experience with TypeScript/JavaScript, React, and Python

    • Experience with API integration and modern web architectures

    • Solid understanding of database fundamentals

    • Familiarity with AWS, Terraform , and cloud infrastructure

    • Experience with automated UI testing frameworks

    • Prior experience with or strong interest in Generative AI

    • Strong communication, collaboration, and problem-solving skills

    Why Join

    • Be part of the founding engineering team at a fast-growing AI startup

    • High ownership and autonomy over product and technical decisions

    • Competitive compensation and meaningful equity

    • Direct impact on customers, product direction, and company culture

    How We Operate

    Here, we encourage everyone to be unapologetically themselves while operating by our core principles:

    • Customer-obsessed: Make customers unreasonably happy

    • Ambitious yet practical: Set bold goals and execute with discipline

    • Direct yet kind: Speak openly, always with respect

    • Driven yet humble: Move fast, aim high, stay grounded

    Work Authorization (Important)

    • Candidates must have unrestricted authorization to work in the U.S.

    • Visa sponsorship is not available now or in the future

    • Work authorization will be confirmed during the screening process