Senior Software Engineer, Box Apps

tags.new Senior Software Engineer, Box Apps Warsaw, Poland Apply 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 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. 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 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. Additional skills / Nice to have: Experience with Node.js and/or 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. Methodology Agile management - Scrum Issue tracking tool - Jira Knowledge repository - Confluence Code reviews - GitHub Enterprise Version control system - GIT 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 .  #LI-GW1 #LI-Hybrid Create a Job Alert Interested in building your career at Box? Get future opportunities sent straight to your email. 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