{"id":53459,"url":"https://alion.io/job/docker-senior-software-engineer-sandboxes-eu-or-east-coast-preferred","title":"Senior Software Engineer, Sandboxes (London or East Coast Preferred)","company":{"id":569,"name":"Docker","domain":"docker.com","url":"https://alion.io/company/docker","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":79,"open_postings":8,"ghost_share":0,"stale_share":0.625,"repost_share":0,"time_to_fill_p50_days":60,"computed_at":"2026-10-26T05:57:25Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_regions","remote_scope_basis":"posting_text","remote_working_hours":{"label":"ET","utc_offset_min":-5,"utc_offset_max":-5},"hiring_geo_confidence":"explicit","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":["US","DE","FR","AT","BE","BG","CA","HR","CY","CZ","DK","FI","HU","IE","IT","NL","PL","RO","ES","SE","EE","GR","LV","LT","LU","MT","PT","SK","SI"],"hiring_countries_total":29,"salary":null,"salary_estimate":{"min_usd":100000,"max_usd":203000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":29},"experience_years_min":8,"visa_sponsorship":true,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Claude Code","optional":false},{"name":"Docker","optional":false},{"name":"Linux","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"OpenAI Codex","optional":false},{"name":"Outlook","optional":false},{"name":"Windows","optional":false}],"status":"live","first_seen_at":"2026-08-12T15:44:37Z","employer_posted_date":"2026-08-12","last_verified_at":"2026-10-26T14:39:12Z","board_verified":true,"closed_at":null,"days_open":74,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":74},"description":"About Docker\nDocker 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.\nWe 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.\n_______________________________________________________________________\nThe 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.\nThis 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.\nThe 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.\nThey 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.\n Please note: this role is currently prioritizing candidates currently located in the Eastern time zone (US or Canada), or in the EU.\nResponsibilities\nDesign, develop, and lead improvements to the sandboxes product across agent integration, tool permissions, and developer-facing workflows.\n\nInvestigate and resolve correctness, performance, and stability issues in the agent integration layer across macOS, Windows, and Linux.\n\nDrive the reliability and performance of sandbox creation, session management, and teardown for AI agent workloads.\n\nCollaborate with peers, Product, and adjacent teams to evolve the architecture as requirements grow.\n\nMentor engineers on the team and set the bar in design reviews and code reviews.\n\nEngage with the open source and agentic development community around sandboxing, MCP, and related ecosystems.\n\nParticipate in on-call rotations and respond to critical stability issues affecting users.\n\nDocument your work clearly and share knowledge with the rest of the team.\n\nQualifications\n8+ years of software engineering experience, with demonstrated technical leadership on production systems at scale.\n\nBachelor’s degree in Computer Science, Engineering, or a related field, or equivalent practical experience\n\nExperience building developer tools, desktop applications, or runtime infrastructure used directly by developers.\n\nFamiliarity with the agentic software development ecosystem: how coding agents work and how tools like Claude Code, Codex, or similar agents interact with their environment.\n\nAbility to reason about isolation and security boundaries: what a sandbox should and shouldn't expose, and how to make safe defaults obvious to users.\n\nExperience driving architecture and technical strategy across multiple engineers or teams.\n\nStrong written and verbal communication skills.\n\nComfortable working with a high degree of autonomy in a remote-first environment.\n\nWhat to Expect\nFirst 30 Days\nBuild an understanding of our codebase.\n\nMeet the people on your team and those adjacent to it.\n\nBuild an understanding of the products we are shipping and our near-term technical priorities.\n\nDeliver small fixes or improvements.\n\nFirst 90 Days\nLead the design and development of a significant improvement or feature of the local sandboxes stack.\n\nEngage with our open source project and the relevant upstream communities.\n\nShape the team's technical direction, and drive architecture discussions.\n\nOne Year Outlook (First Year)\nDeliver measurable improvements to the correctness and performance of sandboxes.\n\nBecome a recognized technical owner of key parts of the codebase and a go-to technical leader for the local runtime.\n\nHelp 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.\n\nDocker considers visa sponsorship on a case-by-case basis based on business needs.\nCompensation & Equity\nUnited States: $160,900 - $260,700 + equity\n______________________________________________________________________\nPosting Information\nOpen vacancy: This posting is for an existing open role.\n\nAI in hiring: Docker may use AI-assisted tools during our recruiting process.\n\nInterview 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.\n\n______________________________________________________________________\nPerks & Benefits\nRemote-first by design - Work from your home, with offices in Seattle and Paris for connection and collaboration.\n\nFlexibility that fits your life - We trust you to manage your schedule while delivering great work.\n\nTime to recharge - Generous PTO, designated quarterly Whaleness Days, and a designated end-of-year Whaleness break.\n\nHome office support - Set up your workspace for comfort and success.\n\nTechnology stipend - Equivalent to US$100 net per month to help support your work.\n\nLearning & development - Annual stipend for conferences, courses, certifications, and continued learning.\n\nParental leave - 16 weeks of paid parental leave after six months of employment.\n\nEquity for all full-time employees - Share in Docker's long-term success as we continue to grow.\n\nComprehensive benefits - Medical, retirement, and paid holidays vary by country.\n\nDocker swag - Because representing the whale never gets old.\n\nDocker 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.","description_format":"text","description_chars":6708,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":true},"security_clearance":false,"languages":[]},"benefits":["Equity","Home office","Parental leave"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"},{"name":"Germany","iso":"DE","kind":"region"},{"name":"France","iso":"FR","kind":"region"},{"name":"Austria","iso":"AT","kind":"region"},{"name":"Belgium","iso":"BE","kind":"region"},{"name":"Bulgaria","iso":"BG","kind":"region"},{"name":"Canada","iso":"CA","kind":"country"},{"name":"Croatia","iso":"HR","kind":"region"},{"name":"Cyprus","iso":"CY","kind":"region"},{"name":"Czech Republic","iso":"CZ","kind":"region"},{"name":"Denmark","iso":"DK","kind":"region"},{"name":"Finland","iso":"FI","kind":"region"},{"name":"Hungary","iso":"HU","kind":"region"},{"name":"Ireland","iso":"IE","kind":"region"},{"name":"Italy","iso":"IT","kind":"region"},{"name":"Netherlands","iso":"NL","kind":"region"},{"name":"Poland","iso":"PL","kind":"region"},{"name":"Romania","iso":"RO","kind":"region"},{"name":"Spain","iso":"ES","kind":"region"},{"name":"Sweden","iso":"SE","kind":"region"},{"name":"Estonia","iso":"EE","kind":"region"},{"name":"Greece","iso":"GR","kind":"region"},{"name":"Latvia","iso":"LV","kind":"region"},{"name":"Lithuania","iso":"LT","kind":"region"},{"name":"Luxembourg","iso":"LU","kind":"region"},{"name":"Malta","iso":"MT","kind":"region"},{"name":"Portugal","iso":"PT","kind":"region"},{"name":"Slovakia","iso":"SK","kind":"region"},{"name":"Slovenia","iso":"SI","kind":"region"}],"hiring_excludes":[],"relocation_offered":false,"industries":["DevOps & Platform Engineering","Virtualization & Containers","Developer Tools"],"lifecycle":[{"event":"open","at":"2026-08-12T15:44:37Z"}],"visa":[],"liveness":{"score":38,"band":"fade","label":"Fading","p_open":1,"p_active":0.869,"p_room":0.44,"age_days":74,"expected_fill_days":60,"reasons":["conf:0","velocity","win:tail","crowd:"],"computed_at":"2026-10-26T05:57:25Z"},"pay":null,"html_url":"https://alion.io/job/docker-senior-software-engineer-sandboxes-eu-or-east-coast-preferred","json_url":"https://alion.io/job/docker-senior-software-engineer-sandboxes-eu-or-east-coast-preferred.json","meta":{"generated_at":"2026-10-26T15:20:06Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":20416,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-27T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":569},"rest":"https://alion.io/mcp/rest/get_company?id=569"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fdocker-senior-software-engineer-sandboxes-eu-or-east-coast-preferred"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fdocker-senior-software-engineer-sandboxes-eu-or-east-coast-preferred"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fdocker-senior-software-engineer-sandboxes-eu-or-east-coast-preferred"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/docker-senior-software-engineer-sandboxes-eu-or-east-coast-preferred\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fdocker-senior-software-engineer-sandboxes-eu-or-east-coast-preferred"}]}