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

About the role

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

Responsibilities

• 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 the organization scales.

Requirements

• 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 such as 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.

Benefits

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