Senior Node.js Developer

Box; Warszawa; On-site; PLN 200,000 - 320,000; Full time

Job summary

Box Poland is seeking a Senior Software Engineer on the Content Creation team to help build real-time collaboration features such as Notes and Canvas. You will work across frontend and backend to deliver scalable, high-quality software in a fast-paced, AI-enabled environment.

You will partner with cross-functional teams to design APIs, implement robust frontend experiences with React/TypeScript, and contribute to on-call rotations while applying AI tools to accelerate development and improve

Qualifications

• 6+ years of professional software development experience.
• Strong coding skills with Node.js and TypeScript for backend.
• Experience designing and implementing APIs and distributed services; solid grasp of system design and data modeling.
• Proven ability to design, build, and deploy high-quality software in cloud environments.
• Expertise HTML/CSS, and at least one modern frontend framework (e.g., React); strong understanding of state management, accessibility, performance, and security basics.
• 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.
• Demonstrate ownership mentality and strives for excellence in both technical work and team interactions.
• Proficient in 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
• 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.

Skills

Node.js

TypeScript

React.js

HTML/CSS

APIs & distributed systems

Cloud environments

Websockets

English proficiency

Tools

Websockets

ProseMirror/TipTap

Cursor AI tools

Job description

What is Box?

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:

As a Senior Software Engineer on the Content Creation team , you will be at the forefront of real time applications within Box. Being one of the core applications, we are one of the first stops customers make when using Box platform. You will play an integral role in paving the future path for what it means to generate content within Box.

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.

What you’ll do:

• 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.

We are an AI-first company. This means you approach your work with a growth mindset and find ways to leverage AI to help make faster, smarter decisions that will 10X your impact at Box.

Who you are:

• 6+ years of professional software development experience.
• Strong coding skills with demonstrated proficiency in Node.js + TypeScript for backend
• Experience designing and implementing APIs and distributed services; solid grasp of system design and data modeling.
• Proven ability to design, build, and deploy high-quality software in cloud environments
• Expertise HTML/CSS, and at least one modern frontend framework (e.g., React); strong understanding of state management, accessibility, performance, and security basics.
• 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.
• Demonstrate 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

Tech Stack:

• Backend: Node.js + TypeScript, some PHP, DB: BigTable
• Frontend: React.js + TypeScript
• Infra: Google Cloud Platform (240 pods, 3 regions)
• Other: websockets, real-time editing and collaboration (ProseMirror / TipTap), low-latency and high-availability

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 Claude 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.

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.

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