Senior Growth Full-Stack Engineer - Remote US

Job DescriptionJob Description The Opportunity

We're looking for a Senior Growth Full-Stack Engineer to join our Activation team at Seamless.AI. This role sits at the intersection of engineering, product, and growth, helping us design, build, and run experiments that accelerate user onboarding, engagement, and activation. You'll partner closely with growth product managers, designers, and analysts to rapidly ship and iterate on experiments that improve how new users discover value in Seamless.AI.

Responsibilities

• Collaborate with growth, product, and data teams to design and implement A / B tests and growth experiments focused on user activation.
• Build, deploy, and maintain full-stack features and experiment infrastructure (frontend + backend).
• Implement and manage feature flagging systems to enable rapid testing and controlled rollouts.
• Work with GrowthBook (or similar experimentation platforms) to set up, track, and analyze experiments.
• Instrument and track user behavior in Amplitude and other analytics platforms to generate insights.
• Write clean, scalable, and maintainable code across the React frontend and Node.js backend.
• Monitor and evaluate experiment outcomes, providing actionable insights and recommendations.
• Balance speed of experimentation with engineering best practices, ensuring quality while moving quickly.
• The #1 goal of this position is to help Seamless.AI increase user activation, feature adoption, and time-to-value. These efforts will maximize customer retention & satisfaction.

Skillset

Education & Requirements

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Since 2015, Seamless.AI has helped sales teams maximize revenue with the world's first real-time B2B search engine. As one of Ohio's fastest-growing companies, we've earned top industry accolades, including G2's 2025 Best Software Products (#1 Highest Satisfaction Product), Purpose Jobs' 2024 Best Places to Work, and LinkedIn's Top 50 Tech Startups (2020, 2022, 2023). We are committed to a diverse, inclusive workplace and do not discriminate based on , , gender, , , or other protected statuses. Visa sponsorship is not available; applicants must be authorized to work in the U.S.