Senior Software Engineer, Sandboxes (London or East Coast Preferred) (Remote)

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About Docker

Docker has been one of the most loved brands in developer tooling, trusted by more than 20 million monthly users and over 20 billion container image pulls. From solo founders to the world's largest companies, developers rely on Docker to build, share, and run their applications across our suite of products including Docker Desktop, Docker Hub, and Docker Scout.

We are a globally distributed, remote-first team building the tools that define how software gets built and delivered. As AI agents redefine software development, Docker is at the center of that shift, providing the sandboxed environments, verified images, and secure infrastructure that make autonomous workflows trustworthy by default.

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The Role

The Docker Sandboxes team is building the runtime that lets AI coding agents run safely on a developer's machine: disposable, isolated microVM sandboxes that each get their own Docker daemon, filesystem, and network.

This is the core of Docker's sbx product: developers can give an agent the autonomy it needs to get real work done without it ever touching the host, and tear the whole environment down when it's finished.

The successful candidate is a technical, product-minded engineer with deep experience building secure, isolated runtime environments (sandboxes, containers, or VMs) and a track record of shipping and owning that kind of infrastructure in production at scale. They think naturally about isolation and security boundaries, understand the tradeoffs involved in running untrusted or semi-trusted workloads safely, and can reason confidently about a system that spans multiple surface areas.

They can drive clarity and consensus on hard, ambiguous problems that cross team and component boundaries, raise the bar for engineering quality wherever they work, thrive in a remote-first environment, communicate clearly across time zones, work with our users, while bringing curiosity and craftsmanship to hard problems.

Please note: this role is currently prioritizing candidates currently located in the Eastern time zone (US or Canada), or in the EU.

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Responsibilities

  • Design, develop, and lead improvements to the sandboxes product across agent integration, tool permissions, and developer-facing workflows.

  • Investigate and resolve correctness, performance, and stability issues in the agent integration layer across macOS, Windows, and Linux.

  • Drive the reliability and performance of sandbox creation, session management, and teardown for AI agent workloads.

  • Collaborate with peers, Product, and adjacent teams to evolve the architecture as requirements grow.

  • Mentor engineers on the team and set the bar in design reviews and code reviews.

  • Engage with the open source and agentic development community around sandboxing, MCP, and related ecosystems.

  • Participate in on-call rotations and respond to critical stability issues affecting users.

  • Document your work clearly and share knowledge with the rest of the team.

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Qualifications

  • 8+ years of software engineering experience, with demonstrated technical leadership on production systems at scale.

  • Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent practical experience

  • Experience building developer tools, desktop applications, or runtime infrastructure used directly by developers.

  • Familiarity with the agentic software development ecosystem: how coding agents work and how tools like Claude Code, Codex, or similar agents interact with their environment.

  • Ability to reason about isolation and security boundaries: what a sandbox should and shouldn't expose, and how to make safe defaults obvious to users.

  • Experience driving architecture and technical strategy across multiple engineers or teams.

  • Strong written and verbal communication skills.

  • Comfortable working with a high degree of autonomy in a remote-first environment.

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What to Expect

First 30 Days

  • Build an understanding of our codebase.

  • Meet the people on your team and those adjacent to it.

  • Build an understanding of the products we are shipping and our near-term technical priorities.

  • Deliver small fixes or improvements.

First 90 Days

  • Lead the design and development of a significant improvement or feature of the local sandboxes stack.

  • Engage with our open source project and the relevant upstream communities.

  • Shape the team's technical direction, and drive architecture discussions.

One Year Outlook (First Year)

  • Deliver measurable improvements to the correctness and performance of sandboxes.

  • Become a recognized technical owner of key parts of the codebase and a go-to technical leader for the local runtime.

  • Help us define the longer-term technical strategy for the filesystem layer in a way that fits with Product and Business goals, and rally the team behind it.

Visa sponsorship: Docker considers visa sponsorship on a case-by-case basis based on business needs.

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Compensation & Equity

All full-time roles include equity. Final compensation is determined on factors including but not limited to experience, skills, qualifications, and location.

United States: $160,900 – $260,700 base

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Posting Information

  • Open vacancy: This posting is for an existing open role.

  • AI in hiring: Docker may use AI-assisted tools during our recruiting process.

  • Interview recordings: Candidates will be invited to opt in to interview recordings to support interviewer calibration and consistent evaluations. Recordings are optional and require explicit consent.

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Perks & Benefits

  • Remote-first by design – Work from your home, with offices in Seattle and Paris for connection and collaboration.

  • Flexibility that fits your life – We trust you to manage your schedule while delivering great work.

  • Time to recharge – Generous PTO, designated quarterly Whaleness Days, and a designated end-of-year Whaleness break.

  • Home office support – Set up your workspace for comfort and success.

  • Technology stipend – Equivalent to US$100 net per month to help support your work.

  • Learning & development – Annual stipend for conferences, courses, certifications, and continued learning.

  • Parental leave – 16 weeks of paid parental leave after six months of employment.

  • Equity for all full-time employees – Share in Docker's long-term success as we continue to grow.

  • Comprehensive benefits – Medical, retirement, and paid holidays vary by country.

  • Docker swag – Because representing the whale never gets old.

Docker is proud to be an equal opportunity employer. We are committed to building a team that reflects a broad range of backgrounds, experiences, and perspectives. We believe diverse teams build better products, make better decisions, and better serve our global community.

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Common Interview Questions And Answers

1. HOW DO YOU PLAN YOUR DAY?

This is what this question poses: When do you focus and start working seriously? What are the hours you work optimally? Are you a night owl? A morning bird? Remote teams can be made up of people working on different shifts and around the world, so you won't necessarily be stuck in the 9-5 schedule if it's not for you...

2. HOW DO YOU USE THE DIFFERENT COMMUNICATION TOOLS IN DIFFERENT SITUATIONS?

When you're working on a remote team, there's no way to chat in the hallway between meetings or catch up on the latest project during an office carpool. Therefore, virtual communication will be absolutely essential to get your work done...

3. WHAT IS "WORKING REMOTE" REALLY FOR YOU?

Many people want to work remotely because of the flexibility it allows. You can work anywhere and at any time of the day...

4. WHAT DO YOU NEED IN YOUR PHYSICAL WORKSPACE TO SUCCEED IN YOUR WORK?

With this question, companies are looking to see what equipment they may need to provide you with and to verify how aware you are of what remote working could mean for you physically and logistically...

5. HOW DO YOU PROCESS INFORMATION?

Several years ago, I was working in a team to plan a big event. My supervisor made us all work as a team before the big day. One of our activities has been to find out how each of us processes information...

6. HOW DO YOU MANAGE THE CALENDAR AND THE PROGRAM? WHICH APPLICATIONS / SYSTEM DO YOU USE?

Or you may receive even more specific questions, such as: What's on your calendar? Do you plan blocks of time to do certain types of work? Do you have an open calendar that everyone can see?...

7. HOW DO YOU ORGANIZE FILES, LINKS, AND TABS ON YOUR COMPUTER?

Just like your schedule, how you track files and other information is very important. After all, everything is digital!...

8. HOW TO PRIORITIZE WORK?

The day I watched Marie Forleo's film separating the important from the urgent, my life changed. Not all remote jobs start fast, but most of them are...

9. HOW DO YOU PREPARE FOR A MEETING AND PREPARE A MEETING? WHAT DO YOU SEE HAPPENING DURING THE MEETING?

Just as communication is essential when working remotely, so is organization. Because you won't have those opportunities in the elevator or a casual conversation in the lunchroom, you should take advantage of the little time you have in a video or phone conference...

10. HOW DO YOU USE TECHNOLOGY ON A DAILY BASIS, IN YOUR WORK AND FOR YOUR PLEASURE?

This is a great question because it shows your comfort level with technology, which is very important for a remote worker because you will be working with technology over time...

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