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Senior Growth Full-Stack Engineer

https://seamless.ai/ Logo

Seamless.AI

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Location:
United States

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Category:
IT - Software Development

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Contract Type:
Employment contract

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Salary:

Not provided
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Job Description:

Senior Growth Full-Stack Engineer role at Seamless.AI focusing on user activation, engagement, and onboarding through experimentation and data-driven approaches

Job Responsibility:

  • 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

Requirements:

  • 5+ years of experience as a full-stack engineer (startup or growth-focused environment preferred) with SaaS product
  • Strong proficiency in modern JavaScript/TypeScript (React.js, Node.js)
  • Proficiency with modern database technologies (PostgreSQL, Vector DBs, OpenSearch, DynamoDB)
  • Proficiency with Cloud architecture and scalability best practices, in particular AWS (Lambda, serverless, cloud-native services)
  • Hands-on experience with A/B testing platforms (GrowthBook, Optimizely, LaunchDarkly, etc.)
  • Familiarity with feature flag systems and controlled experiment rollout strategies
  • Experience with product analytics tools (Amplitude, Segment, Tableau)
  • Ability to translate growth hypotheses into technical experiments quickly and iteratively
  • Strong data-driven mindset with the ability to evaluate experiment outcomes statistically
  • Comfortable working in fast-moving, cross-functional growth teams
  • Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent practical experience)
  • Proven experience delivering full-stack features and experiment infrastructure in a fast-paced environment
  • Demonstrated ability to collaborate across engineering, product, and growth teams
  • Strong problem-solving and analytical skills with a data-first approach

Nice to have:

  • Background in PLG, growth engineering, activation, or onboarding-focused roles
  • Experience with event-driven architecture and scalable systems
  • Familiarity with in-app education & onboarding tooling (e.g., Userflow)
  • Familiarity with Pinecone and LLMs
  • Experience building SaaS applications in the B2B or productivity space

Additional Information:

Job Posted:
September 06, 2025

Employment Type:
Fulltime
Work Type:
Remote work
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