Senior Fullstack Engineer, Content Creation

Box; Warszawa; Hybrid; PLN 260,000 - 320,000; Full time

Job summary

Box Poland is seeking a Senior Frontend Engineer to join our Content Creation team. You will work on Notes and Canvas, delivering high-quality, scalable web UI using React.js with strong HTML/CSS and modern front-end practices.

You will collaborate with cross-functional teams, design APIs, and contribute to real-time features and engineering standards. The role requires ownership, security-minded development, and occasional on-call responsibilities.

Qualifications

• 6+ years of professional software development experience.
• Deep expertise in JavaScript/TypeScript with React.js and strong HTML/CSS knowledge.
• Some backend coding experience with Node.js is required, and proficiency will be an advantage.
• Experience designing and implementing APIs and services; solid grasp of system design and data modeling.
• Proven ability to design, build, and deploy high-quality software.
• Strong knowledge of algorithms, data structures, software design principles, and OO programming.
• Proficient in English.

Responsibilities

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

Skills

JavaScript/TypeScript

React.js

HTML/CSS

APIs & data modeling

English proficiency

Algorithms & data structures

Ownership & excellence

Tools

Node.js

Web sockets

GCP/AWS

Job description

Box (NYSE:BOX) is the leader in Intelligent Content Management. Our platform enables organizations to fuel collaboration, manage the entire content lifecycle, secure critical content, and transform business workflows with enterprise AI. We help companies thrive in the new AI-first era of business. Founded in 2005, Box simplifies work for leading global organizations, including JLL, Morgan Stanley, and Nationwide. Box is headquartered in Redwood City, CA, with offices across the United States, Europe, and Asia.

By joining Box, you will have the unique opportunity to continue driving our platform forward. Content powers how we work. It’s the billions of files and information flowing across teams, departments, and key business processes every single day: contracts, invoices, employee records, financials, product specs, marketing assets, and more. Our mission is to bring intelligence to the world of content management and empower our customers to completely transform workflows across their organizations. With the combination of AI and enterprise content, the opportunity has never been greater to transform how the world works together and at Box you will be on the front lines of this massive shift.

Why Box needs you:

The Content Creation team owns Notes and Canvas products of Box's platform. The functionality that this team builds is used by our largest cohorts of users (versus just admin users). They are the only true real-time service at Box, using web sockets to deliver a real-time editing product. It’s a complex problem space that we are experts in, and it’s a great team to join if you want to contribute to creating one of the most vital Box products. The team is mostly developing Front-End with React.js, for Back-End tasks they use mostly Node.js.

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 (e.g., Claude, Cursor) 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
• Maintain and support one or more legacy codebases
• Contribute to defining and implementing engineering 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.

Requirements:

• 6+ 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; strong understanding of state management, accessibility, performance, and security basics.
• Some 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.
• Proven ability to design, build, and deploy high-quality software.
• Strong knowledge of algorithms, data structures, software design principles, and object-oriented programming.
• Passionate about new technologies with the capability to implement them in existing products.
• Demonstrates ownership mentality and strives for excellence in both technical work and team interactions.
• Proficient in English.

Nice to have:

• Experience with Google Cloud Platform and/or Amazon Web Services.
• Experience with Web sockets and real-time applications
• Experience contributing to cross-platform solutions as part of a team

At Box, we believe that providing the best tools leads to the best outcomes. That's why we equip our engineers with AI-powered development tools like Cursor IDE and GitHub Copilot to help you write better code faster.

Benefits

Check out the overview of the benefits and additional perks offered at Box.

Box lives its values, with community and in-person collaboration being a core part of our culture. Boxers are expected to work from their assigned office a minimum of 3 days per week, with a focus on Tuesdays, Wednesdays, and Thursdays. Your Recruiter will share more about how we work and company culture during the hiring process.

EQUAL OPPORTUNITY

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability, and any other protected ground of discrimination under applicable human rights legislation.

For details on how we protect your information when you apply, please see our Personnel Privacy Notice. For more details on how Box Poland protects your information, please see our Supplemental Personnel and Candidate Privacy Notice.