Senior Full-Stack Engineer (AI-Driven Backend Focus)

Similarweb; United States; On-site; USD 140,000 - 190,000; Full time

Job summary

Similarweb is seeking a Senior Fullstack Engineer with a strong backend orientation to join our AI-powered product development. You will work across backend services and frontend collaboration, shaping the data models, APIs, and user experiences that power our digital intelligence platform.

You will design scalable backend architectures using NestJS, Node.js, TypeScript, and Python while integrating AI tooling to enhance productivity and code quality.

Qualifications

• 5+ years of fullstack engineering experience with backend focus.
• Strong proficiency in Node.js, TypeScript, and NestJS; Python is a plus.
• Solid React and frontend fundamentals.
• Experience designing scalable backend architectures and data models.
• Deep understanding of API design, authentication flows, and distributed system tradeoffs.
• Experience with relational and NoSQL databases.
• Familiar with testing methodologies and observability tooling.
• Experience using AI development tools in daily workflows.
• Ability to work in fast iteration environments.

Responsibilities

• Design and build scalable backend services using NestJS (Node.js/TypeScript) and/or Python.
• Own API design, contracts, and versioning across services
• Design and optimize data models, database schemas, and query performance
• Implement authentication, authorization, and secure API integration patterns
• Build reliable data-fetching layers, caching strategies, and async processing
• Lead backend technical decisions, code quality standards, and system architecture
• Ensure system scalability, fault tolerance, and observability
• Contribute to CI/CD pipelines and deployment practices for backend services
• Collaborate on frontend applications built with React, TypeScript, and Vite
• Partner with frontend engineers to align on data shapes and UX constraints
• Translate product requirements into robust technical solutions
• Conduct high-quality code reviews and drive architectural discussions
• Improve testing, observability, CI/CD, and system reliability
• Use AI coding tools effectively, validate and refine AI-generated code

Skills

Node.js

TypeScript

NestJS

Python

React

Frontend fundamentals

API design

Distributed systems

CI/CD

AI tooling

Prompt engineering

Testing methodologies

Security best practices

Communication

Tools

SQL

NoSQL

REST APIs

Job description

Similarweb is seeking a Senior Fullstack Engineer with a strong backend orientation to join our AI-powered product development. You will work across backend services and frontend collaboration, shaping the data models, APIs, and user experiences that power our digital intelligence platform.

You will design scalable backend architectures using NestJS, Node.js, TypeScript, and Python while integrating AI tooling to enhance productivity and code quality.