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Senior Full Stack Engineer (Backend) - Casual AI -MarTech/AdTech

Three Pillars Recruiting
San Francisco, CA Full Time
POSTED ON 12/24/2025
AVAILABLE BEFORE 1/22/2026
PLEASE CLICK HERE TO SEE *ALL* OF OUR JOB OPENINGS!

Senior Full Stack Engineer (Backend)

As a Senior Full-Stack Engineer, you'll be a key player in building the technology platform that delivers these insights, working with cutting-edge algorithms and composite AI solutions. This role offers the perfect balance of technical challenge and business impact in a fast-growing environment where your contributions will be visible from day one.

What You’ll Do

  • Architect, design, and develop full-stack applications, ensuring scalability, security, and performance.
  • Build and optimize frontend applications using modern frameworks.
  • Develop backend services and APIs using languages like Node.js or Python.
  • Design and manage databases and data-intensive applications.
  • Mentor junior and mid-level engineers, fostering a strong technical culture.
  • Contribute to hiring and shaping the engineering team as we scale.

What Will Help You Succeed

  • 10 years of experience as a full-stack engineer, with deep expertise in both frontend and backend development.
  • Strong experience with JavaScript/TypeScript and modern frontend frameworks like React.
  • Proficiency in backend development using Node.js and Python.
  • Experience designing scalable architectures, including microservices, serverless, or event-driven systems.
  • Deep understanding of databases, query optimization, and data modeling (PostgreSQL and Elastic).
  • Experience working with cloud platforms (AWS, GCP, Azure) and DevOps tools (Docker, Kubernetes, Terraform, CI/CD pipelines).
  • Strong problem-solving skills and ability to navigate ambiguous startup environments.
  • Excellent collaboration and communication skills, with the ability to work cross-functionally.

Nice-to-Haves

  • Experience in AI/ML or working with data platforms.
  • Previous experience in high-growth startups.
  • Experience leading teams or projects in a fast-paced environment.

Why Join?

  • Be a foundational team member and help shape the company’s technology and culture.
  • Onsite collaboration in their San Francisco office.
  • Opportunity to grow into a technical leadership role as they scale.
  • Work on cutting-edge technology and solve complex engineering challenges.

Job-3508022

Salary.com Estimation for Senior Full Stack Engineer (Backend) - Casual AI -MarTech/AdTech in San Francisco, CA
$142,987 to $179,940
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