Senior Software Engineer, Box Apps

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 AstraZeneca, 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

Box Apps is redefining how enterprises build with content—delivering an intelligent no‑code builder that lets teams automate, orchestrate, and make smarter decisions faster. We’re investing in our Warsaw hub to scale this product globally. As a Senior Software Engineer, you’ll lead projects from concept to production, elevate engineering standards, and shape our technical direction for a rapidly growing product surface used by thousands of customers.

WHAT YOU’LL DO

• Lead design and delivery of complex, user‑facing features and platform capabilities across the Box Apps frontend.
• Partner with product, design, and backend teams to define APIs, data contracts, and cohesive end‑to‑end experiences.
• Drive technical specs, architectural reviews, and design docs that balance velocity, quality, and maintainability.
• Champion reliability with comprehensive testing (unit/integration/e2e), performance profiling, and observability.
• Mentor engineers through pairing, design reviews, and actionable feedback; help level up team practices.
• Decompose ambiguous problems, create roadmaps, and deliver iteratively against quarterly goals.
• Contribute to on‑call readiness, incident response, and post‑mortems; drive preventative improvements.
• Influence frontend standards, tooling, and developer experience; contribute to a strong engineering culture in Warsaw.

WHO YOU ARE

• 5+ years of professional experience building and scaling modern web applications.
• Deep expertise in JavaScript/TypeScript, HTML/CSS, and at least one modern frontend framework (e.g., React); strong understanding of state management, accessibility, performance, and security basics.
• Proven track record leading end‑to‑end projects and collaborating across functions to ship high‑impact features.
• Strong system design skills for frontend architectures and API integration patterns.
• Proficient with testing strategies and frameworks (Jest, Playwright/WebDriverIO) and CI/CD best practices.
• Excellent communication: can align stakeholders, write clear design docs, and give/receive high‑quality feedback.
• Growth mindset with high ownership, pragmatic decision‑making, and a focus on outcomes.
• English proficiency required.

Preferred:

• Experience with Node.js; exposure to Java is a plus.
• Familiarity with cloud platforms (GCP, AWS, or Azure) and modern observability tooling.
• Experience with relational and document databases; comfort reading backend code when needed.
• Prior experience in platform/low‑code/no‑code products or building SDKs/design systems.

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, focusing on Tuesdays and Thursdays. Your recruiter will share more about how we work and our culture during the 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. 

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