> Markdown version of [/jobs/ext/2391915-senior-software-engineer-sandboxes-eu-or-east-coast-preferred](https://www.wearedevelopers.com/jobs/ext/2391915-senior-software-engineer-sandboxes-eu-or-east-coast-preferred). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer, Sandboxes (EU or East Coast Preferred) - **Company:** Docker - **Location:** UK (Remote available) - **Experience:** Expert - **Salary:** £94,040.0 - £155,650.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Adobe InDesign, Apple Mac Systems, Software Applications, Code Review, Linux, Programming Tools, Open Source Technology, Session Management, Software Engineering, Information Technology, Virtual Agents, Docker - **Published:** August 14, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5841930637 ## About the Role 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., * 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. ## Description * 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., * 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. * 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. * 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. Docker considers visa sponsorship on a case-by-case basis based on business needs. ## Related Videos - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [YOLO Developer Workflows with a Coding Agent in a Box](https://www.wearedevelopers.com/videos/100350-yolo-developer-workflows-with-a-coding-agent-in-a-box) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Are Code Reviews Worth It? Insights from 16 Years of Review Data](https://www.wearedevelopers.com/videos/1135-are-code-reviews-worth-it-insights-from-16-years-of-review-data) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [Docker build without Docker](https://www.wearedevelopers.com/videos/100114-docker-build-without-docker) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 230: Secure Agent Sandboxes, $100m OSS & Tricking Claude](https://www.wearedevelopers.com/magazine/744-dev-digest-230-secure-agent-sandboxes-100m-oss-tricking-claude) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers)