Senior Full Stack Engineer (Frontend-Oriented, AI-First Product Team)
At Similarweb, we are revolutionizing the way businesses interact with the digital world by revealing to them everything that happens online.
Our unique data and solutions empower over 4,300 customers globally, including industry giants like Google, eBay, and Adidas, to make game-changing decisions that drive their digital strategies.
In 2021, we went public on the New York Stock Exchange, and we continue to reach new heights! Come work alongside Similarwebbers across the globe who are bright, curious, practical and good people.
Why is this role so important at Similarweb?
We are looking for a Senior Full Stack Engineer with strong frontend and product orientation to build modern, scalable, AI-powered product experiences.
This role combines deep expertise in client-side architecture and user experience with the ability to contribute across backend services, APIs, and platform infrastructure. You will work closely with product, design, backend, and data/AI teams to deliver end-to-end features while driving engineering excellence and leveraging AI throughout the development lifecycle.
We are looking for engineers who are passionate about building great products, care deeply about user experience, and enjoy owning solutions from concept to production.
So, what will you be doing all day?
Full Stack Engineering
Build end-to-end product experiences across frontend and backend systems
Develop modern web applications using React, TypeScript, Vite, and NestJS
Design scalable frontend architectures, reusable UI components, and shared platform capabilities
Own complex features from concept to production across client and server layers
Design and implement APIs, business logic, and integrations with internal and external services
Optimize application performance, reliability, accessibility, and developer experience
Collaborate closely with product, design, data, and infrastructure teams
Contribute to testing strategies, observability, deployment pipelines, and platform improvements
Lead technical decisions spanning frontend and backend domains
Drive engineering best practices, maintainability, and scalability across the codebase
Backend & Platform Development
Design, build, and maintain backend services using NestJS
Define API contracts and integration patterns across systems
Participate in architectural decisions across frontend and backend systems
Build scalable and reliable services supporting AI-powered product experiences
Contribute to authentication, authorization, and platform capabilities
Understand and optimize system performance across the full stack
Support production operations, monitoring, troubleshooting, and incident resolution when needed
Product & UX
Translate product requirements into polished and intuitive user experiences
Work closely with product designers to improve usability and interaction quality
Balance speed, quality, technical excellence, and business impact
Advocate for accessible, user-centric, and data-informed interfaces
Contribute product ideas and technical insights throughout the product lifecycle
Technical Leadership
Provide technical leadership across frontend and backend domains
Mentor engineers and conduct high-quality code reviews
Drive architectural discussions and engineering best practices
Improve testing, observability, CI/CD, and application reliability
Promote ownership and accountability from design through production
Help establish scalable engineering processes and standards
AI-Augmented Engineering
Use AI coding tools effectively (Cursor, Copilot, Claude, ChatGPT, etc.)
Critically evaluate, validate, and improve AI-generated code
Design efficient workflows for AI-assisted development
Integrate AI capabilities into product experiences where relevant
Understand the limitations, risks, and tradeoffs of LLM-based systems
Contribute to engineering productivity through AI tooling and automation
Collaborate with AI and data teams to build AI-native product experiences
This is the perfect job for someone who:
5+ years of software engineering experience
Strong experience building production-grade web applications across frontend and backend layers
Expert-level proficiency in React, TypeScript, HTML, and CSS
Experience developing backend services using Node.js, NestJS, or similar frameworks
Strong understanding of API design, authentication, and integration patterns
Experience designing scalable frontend architectures and reusable component systems
Deep understanding of state management, rendering, caching, and performance optimization
Experience working with REST APIs and modern frontend data-fetching patterns
Strong understanding of web application performance, accessibility, and responsive design
Experience with testing methodologies, monitoring, and observability practices
Strong product mindset and user experience intuition
Excellent communication, collaboration, and problem-solving skills
AI & Modern Engineering
Hands-on experience using AI development tools in daily workflows
Ability to validate, debug, and improve AI-generated code
Understanding of prompt engineering for software development workflows
Familiarity with AI-powered product patterns and user experiences
Ability to work effectively in fast-paced, iterative environments
Nice to Have
Experience building AI-native or AI-assisted product experiences
Experience integrating LLMs, agents, RAG systems, or AI platforms into products
Experience working in high-growth SaaS or product-driven companies
Familiarity with cloud infrastructure and modern DevOps practices
Experience with analytics, experimentation, and product measurement frameworks
What We’re Looking For
A product-minded engineer who enjoys building exceptional user experiences while owning technical solutions end-to-end. Someone who can comfortably move between frontend, backend, architecture, and product discussions, leverage AI effectively in their workflow, and help shape the next generation of AI-powered products
At Similarweb, collaborating with our colleagues in-office creates a more connected, unified culture. Our best work is a product of our face-to-face collaboration, with the ability to work partially from home.
Why you’ll love being a Similarwebber:
You’ll actually love the product you work with: Our customers aren’t our only raving fans. When we asked our employees why they chose to come work at Similarweb, 99% of them said “the product.” Imagine how exciting your job is when you get to work with the most powerful digital intelligence platform in the world.
You’ll find a home for your big ideas: We encourage an open dialogue and empower employees to bring their ideas to the table. You’ll find the resources you need to take initiative and create meaningful change within the organization.
We offer competitive perks & benefits: We take your well-being seriously, and offer competitive compensation packages to all employees. We also put a strong emphasis on community, with regular team outings and happy hours.
You can grow your career in any direction you choose: Interested in becoming a VP or want to transition into a different department? Whether it’s Career Week, personalized coaching, or our ongoing learning solutions, you’ll find all the tools and opportunities you need to develop your career right here.
Diversity isn’t just a buzzword: People want to work in a place where they can be themselves. We strive to create a workplace that is reflective of the communities we serve, where everyone is empowered to bring their full, authentic selves to work. We are committed to inclusivity across race, gender, ethnicity, culture, sexual orientation, age, religion, spirituality, identity and experience. Our culture of equality and mutual respect also helps us better understand and serve our customers in a world that is becoming more global, more diverse, and more digital every day.
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