Senior Software Engineer, Desktop

Box; Warszawa; On-site; PLN 260,000 - 360,000; Full time

Job summary

Box, a leader in Intelligent Content Management, seeks a Senior Software Engineer for its Desktop Applications team in Warsaw. You will design, implement, and ship Box Drive, Box Tools, and Box for Office across Windows and macOS, bridging native and React Native code while ensuring performance, security, and reliability.

You will collaborate with product managers, QA, and designers to deliver high-quality desktop experiences, routinely review architecture, and contribute to Box culture in

Qualifications

• 5+ years of professional desktop software development experience.
• Proficient in C++, C#, and/or Swift with strong software design principles.
• Experience building and shipping desktop applications on Windows and macOS.
• Comfortable across the full desktop stack: VFS, OS integrations, networking, UI.
• Must speak English proficiently.

Responsibilities

• Design, develop, and ship high-quality features for Box's desktop apps (Box Drive, Box Tools, Box for Office) on Windows and macOS.
• Work across the desktop stack: VFS, data persistence, OS integrations, network, sync, UI.
• Contribute to cross-platform development using React Native for desktop.
• Collaborate with Product Managers, QA, and designers to translate requirements into robust software.
• Lead design discussions, architecture reviews, and code reviews to uphold quality.
• Diagnose and resolve performance, reliability, and compatibility issues affecting millions of users.
• Participate in on-call rotation and team meetings.

Skills

Desktop development

C++

C#

Swift

React Native

AI coding tools

Tools

Win32 APIs

GitHub Enterprise

Jenkins

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 Desktop Applications team at Box, you'll be at the heart of building and evolving the products that millions of users rely on every day - Box Drive, Box Tools, and Box for Office on both Windows and macOS. You'll work across the full depth of the desktop stack, from virtual file systems and OS integrations to sync, networking, and UI, helping shape how enterprise content comes to life on the desktop. You'll collaborate closely with Product Managers, QA engineers, and designers to deliver features that are fast, reliable, and secure - and you'll bring a growth mindset and a passion for leveraging AI tools to accelerate your impact.

What you'll do:

• Design, develop, and ship high-quality features for Box's desktop applications (Box Drive, Box Tools, Box for Office) on Windows and macOS, ensuring they are performant, user-friendly, and secure
• Work across the full desktop stack - including virtual file systems, data persistence, OS integrations, network and sync layers, and UI - to solve complex technical challenges at scale
• Contribute to cross-platform development using React Native, bridging front-end and native desktop experiences
• Collaborate daily with Product Managers, QA engineers, and designers to translate requirements into robust, well-tested software
• Lead and participate in design discussions, architecture reviews, and code reviews to uphold engineering quality and share knowledge across the team
• Diagnose and resolve complex performance, reliability, and compatibility issues affecting millions of end users
• Attend and engage in weekly stand-ups, team meetings, and manager 1:1s
• Work collaboratively with other engineers, team members, and across teams
• Play a role in developing and fostering Box culture in the Warsaw office and represent Box Poland internally and externally
• Participate in our on-call rotation, available at all times while on-call to help respond to and triage any issues that arise

Who you are:

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.

5+ years of professional desktop software development experience

Proficient in C++, C#, and/or Swift, with a strong command of software design and architecture principles

Demonstrated experience building and shipping desktop applications on Windows and/or macOS

Comfortable working across the full desktop stack: virtual file systems, OS integrations, networking, sync, and UI

Experienced with unit testing and functional testing practices in an agile team environment

Passionate about building software that is user-friendly, performant, and secure

Strong problem-solving skills with the ability to diagnose and resolve complex technical issues

Able to assess, communicate, and complete project milestones with your manager and team members in a time-sensitive manner

Must speak English proficiently

Preferred Skills:

• Experience with Windows systems-level programming (Win32 APIs, multi-threading, IPC, COM)
• Cross-platform development experience across both macOS and Windows
• Familiarity with React Native for desktop or cross-platform UI development
• Prior experience using AI coding tools (e.g., GitHub Copilot, Cursor) as part of your daily workflow

Percentage of Time Spent:

15% design and architecture

60% coding, code reviews, and testing

15% bug fixes

5% documentation

5% meetings

Methodology:

Agile management - Scrum

Issue tracking - Jira

Knowledge repository - Box / Confluence / GitHub Enterprise

Code reviews - GitHub Enterprise

Version control - GIT

CI/CD - Jenkins

Communication - Slack / Zoom

BENEFITS

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