Senior Fullstack Engineer | Tax Technology and Operations | Stockholm

The opportunity

We are looking for a great colleague to join our EY Tech People team as a Senior Fullstack Engineer, where you will play a pivotal role in building innovative tax automation tools and AI-integrated platforms across several business-critical products. Our mission is to enhance efficiency, quality, and satisfaction in tax and compliance workflows, serving thousands of clients with accurate and compliant tax filings.

As part of a dynamic organization operating across the Nordics (DK, FI, SE, NO), you will collaborate with a talented group of engineers, designers, researchers and product managers in a flat, informal structure. While experience in tax law is beneficial, a passion for technology and collaboration is what we truly value.

Your key responsibilities

Building end-to-end tax automation features from React frontends to Node.js backends

Developing AI-integrated platforms with seamless user experiences and robust data processing

Close collaboration with designers, product managers, and fellow developers as well as sparring with users and researchers to understand tax workflows in detail

Contributing to internal tooling and developer experience, including AI-assisted development workflows, MCP server implementations, and prompt libraries

Working across a range of products and problem spaces in the fullstack domain

Skills and attributes for success

Frontend Expertise (Required):

React/TypeScript: Extensive experience with modern hooks, state management, and performance optimization

Modern Tooling: Experience with build tools (Vite/webpack), testing frameworks (Cypress/Playwright), and Kubernetes deployments

Complex UI Development: Building multi-step workflows, sophisticated form validation, and responsive interfaces

Backend Proficiency (Required):

Node.js: Extensive experience with Express, async programming, and RESTful API development

MongoDB: Strong experience with document design, aggregation pipelines, and performance