Senior Full-Stack Engineer (Node.js + React)

This is us

At Avenga, we believe that human creativity empowers technology that matters. Operating globally, our 6000+ specialists provide a full spectrum of services, including business and tech advisory, enterprise solutions, CX, UX and Ul design, managed services, product development, and software development.

This is the job

Our client is a global leader in the streaming and digital media industry, driving innovation in advertising technology and next-generation viewer experiences. They are actively investing in advanced Advertising Engineering initiatives, with a strong focus on leveraging generative AI to transform ad creatives and campaign optimization.

They are seeking a Senior Full-Stack Engineer (Node.js + React) to design and develop scalable, high-performance solutions across both frontend and backend. This role involves building intuitive user interfaces, developing robust backend services, and collaborating closely with product managers and AI engineers to deliver seamless, AI-driven advertising experiences.

This is you

7+ years of professional experience with Node.js, building and maintaining production-grade, high-traffic applications.
3+ years of hands-on experience with React and its ecosystem.
Expert-level knowledge of JavaScript and TypeScript (including prototypical inheritance, scope, and closures).
Strong skills in RESTful API design and integration.
Solid knowledge of HTML, CSS, HTTP, and familiarity with XML, JSON, DOM, and W3C standards.
Experience with Express, SASS/LESS, npm, CI/CD pipelines.
Familiarity with state management libraries (Redux, Zustand, MobX).
Comfortable working with Git and modern version control workflows.
Hands-on experience with automated testing (Jest, Cypress, Playwright or similar).
Enthusiastic about modern web standards, clean code, and scalable architecture.
Fluent communication in English at Upper-Intermediate (B2) level or above is required.

This is your role

Build and maintain end-to-end features across both frontend and backend (Node.js + React).
Develop scalable backend services with Node.js and Express, integrating with databases and third-party APIs.
Create responsive and reusable UI components with React, integrating seamlessly with backend APIs.
Optimize performance and reliability across the stack (caching, rendering, query optimization, etc.).
Collaborate with designers, product managers, and other engineers to deliver high-quality solutions.
Debug, profile, and resolve issues in both frontend and backend environments using modern DevTools.
Write clean, maintainable, and well-tested code to ensure system reliability and scalability.
Participate in architecture discussions, code reviews, and continuous improvement of the development process

What awaits you at Avenga?

We offer an attractive social and benefits package.
Everyone at Avenga is subject to professional growth via our mentorship program.
Our specialists get regular performance reviews and technical assessments to identify development plans.
The company provides extended training and certification opportunities.
We stay up to date with the industry by embarking on tech talks, webinars, conferences, and hackathons.
Avenga cares for its employees’ well-being by providing well-rounded health insurance coverage and fitness compensation programs.
Our employees’ families are no less important, as we offer maternity aid and financial support for a number of family reasons, including marriage and childbirth.
The company fosters a sense of professional belonging and an environment of togetherness: we achieve things together and celebrate our milestones.

We take pride in the diverse skills and character of our teams, welcoming everyone to apply and contribute to our collective strength.

Senior Full-Stack Engineer (Node.js + React)

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