Senior Fullstack Engineer, Metadata Platform & AI

Box, Inc.; Warszawa; Hybrid; PLN 180,000 - 300,000; Full time

Job summary

Box, Inc. in Warsaw, Poland, is seeking a Software Engineer III to join our team and help build the next generation of the Box Metadata Platform in an AI-first environment.

You will work with frontend and backend technologies, collaborate with cross-functional teams, and contribute to scalable, secure software that impacts millions of users and global enterprises. This hybrid role requires regular office presence and strong English communication.

Qualifications

• 3+ years of professional software development experience.
• Deep expertise in JavaScript/TypeScript with at least one modern frontend framework (e.g., React), and strong HTML/CSS knowledge with responsive UIs; understanding of state management, accessibility, performance, and security basics.
• Backend coding experience with Node.js is required, and proficiency will be a big advantage.
• Experience designing and implementing APIs and services; solid grasp of system design and data modeling.
• Ability to design, build, and deploy high-quality software is a must.
• Proficiency in spoken and written English.

Responsibilities

• Develop high-quality, scalable, and responsive software using modern technologies.
• Write clean, efficient, and maintainable code using industry best practices.
• Partner with cross-functional teams to onboard, share knowledge, and align on current responsibilities and priorities
• Participate in regular team meetings and manager 1:1s to ensure alignment, growth, and continuous improvement
• Create clear technical documentation, reusable patterns, and examples to scale knowledge across engineering teams
• Leverage AI tools to accelerate development, research, documentation, and bug triage while maintaining high standards of quality and security
• Represent and advocate for Box Poland’s engineering excellence both internally and externally
• Contribute to defining and implementing engineering and operational standards across product teams
• Participate in our on-call rotation, available at all times while on-call to help respond to and triage any issues that arise.

Skills

JavaScript/TypeScript

React

HTML/CSS

Node.js

APIs

System design

English

Tools

Jira

Confluence

GitHub Enterprise

Git

Job description

Box, Inc. in Warsaw, Poland, is seeking a Software Engineer III to join our team and help build the next generation of the Box Metadata Platform in an AI-first environment.

You will work with frontend and backend technologies, collaborate with cross-functional teams, and contribute to scalable, secure software that impacts millions of users and global enterprises. This hybrid role requires regular office presence and strong English communication.