{"id":138606,"url":"https://alion.io/job/mattermost-staff-full-stack-engineer","title":"Staff Full Stack Engineer","company":{"id":38744,"name":"Mattermost","domain":"mattermost.com","url":"https://alion.io/company/mattermost-com","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"staff","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["United States"],"countries":["US"],"hiring_countries":["US"],"hiring_countries_total":1,"salary":{"min":172724,"max":227135,"currency":"USD","period":"year","gross":null,"usd_annual":227135},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Claude Code","optional":false},{"name":"Copilot","optional":false},{"name":"Cursor","optional":false},{"name":"Go","optional":false},{"name":"Microsoft Teams","optional":false},{"name":"Outlook","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React.js","optional":false},{"name":"Redis","optional":false},{"name":"Rest API","optional":false},{"name":"TypeScript","optional":false},{"name":"WebSockets","optional":false},{"name":"FedRAMP","optional":true},{"name":"JavaScript","optional":true},{"name":"Model Context Protocol","optional":true}],"status":"live","first_seen_at":"2026-08-26T18:39:47Z","employer_posted_date":"2026-08-26","last_verified_at":"2026-10-16T16:35:20Z","board_verified":true,"closed_at":null,"days_open":51,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":51},"description":"Mattermost is the leading collaborative workflow platform for defense, intelligence, security, and critical infrastructure. Trusted by the U.S. Department of War and Fortune 500s, our platform runs on-premises and in private clouds, delivering secure messaging, file sharing, workflow automation, audio/screenshare, and project management-all with full data and operational control. Mattermost powers high-stakes workflows across mission planning, real-time, real-world operations, DevSecOps, incident response, and cyber defense-enabling secure collaboration from tactical edge and DDIL environments to enterprise HQ. Teams operate across web, desktop, and mobile, with embedded interoperability for Microsoft Teams, Outlook, and Microsoft 365.\nTo learn more, visit www.mattermost.com\nWe are seeking a Staff Full Stack Engineer to set the technical direction for and scale Mattermost’s core web platform for teams operating in defense and critical infrastructure sectors. You’ll drive architecture and technical strategy across our Go backend and React/TypeScript web frontend - partnering across teams to ship features that hold up under strict security, compliance, and reliability requirements.\nOur engineering culture is AI-forward. We expect engineers to work fluently with AI coding agents such as Claude Code day-to-day - for scaffolding, refactors, code review, and test generation - and treat that as core craft rather than a shortcut. We would rather hire smart people who get stuff done than chase an exact tech-stack match. If you have a track record of shipping and owning complex software end-to-end, we want to hear from you.\nWhat You Will Do\nDefine and drive the technical architecture and roadmap for Mattermost’s core web platform across multiple engineering teams, spanning Go, React, TypeScript, PostgreSQL, and Redis\nSet org-wide standards and best practices for AI-agentic engineering workflows - going beyond personal fluency with tools like Claude Code and Cursor to shape how the broader engineering org adopts them, while retaining accountability for correctness, security, and design decisions\nLead the internal tooling and testing infrastructure strategy that speeds up delivery for the broader engineering org, not just your immediate team\nOwn the testing strategy and quality bar across frontend and backend systems, and hold other engineers accountable to it through design reviews and mentorship\nDrive architectural decisions for REST and WebSocket API design, grounded in deep networking fundamentals\nPartner directly with security, compliance, and product leadership on strategic technical bets tied to our government and enterprise customer requirements\nMentor senior engineers and act as a technical multiplier across the org\nContribute to and help shape technical direction for Mattermost’s open-source codebase\nWhat We Are Looking For\nRequired:\nSenior full-stack development experience in Go and React (or a comparable stack), with a track record of owning complex systems end-to-end\nProven experience designing and owning distributed systems or high-availability service architecture at scale\nExperience designing and consuming REST and WebSocket APIs with solid networking fundamentals\nRelational database experience including PostgreSQL, schema design, and query optimization\nHands-on daily fluency directing AI coding agents such as Claude Code, Cursor, or Copilot for scaffolding, refactors, code review, and test generation - with the judgment to know when to trust the output and when to take the wheel yourself\nDemonstrated ability to influence technical direction across multiple teams without relying on formal authority\nExperience mentoring senior engineers and raising the technical bar for a broader team\nComfortable operating in regulated or high-compliance environments (e.g., enterprise security, government, or critical infrastructure requirements)\nNice to Have:\nPrior experience operating as a staff, principal, or technical lead engineer at another company\nExperience maintaining (not just contributing to) an open-source project\nProgram-level familiarity with compliance frameworks relevant to defense or government customers (e.g., FedRAMP, ITAR)\nExperience helping scale engineering practices or standards across a growing organization\nBackground in defense, intelligence, or critical infrastructure products\nExperience building tools, skills, or workflows on top of AI coding agents including MCP servers, agent skills, or CI-integrated agents\nHow Success Is Measured\nFirst 90 Days: Build cross-team credibility by shipping a meaningful full-stack feature on the core platform, while assessing the technical landscape and identifying the highest-leverage architectural or process improvements to pursue.\nWhy Mattermost\nMission-driven work: Your contributions directly support the organizations and missions that depend on secure, reliable collaboration including the U.S. Department of War and critical infrastructure operators worldwide\nRemote-first culture: Work from anywhere with a globally distributed, high-trust team built for autonomy and ownership\nAI-forward environment: We actively adopt and build AI-enabled workflows. Agentic development is core craft here, not a novelty\nEnd-to-end ownership: Ship and own complex software across the full stack with real accountability for what you build\nOpen source at the core: Be part of a vibrant developer community shaping the future of secure collaboration\nCompensation\nMattermost takes a market-based approach to pay. Actual compensation may vary based on location, skills, experience, qualifications, and market conditions.\nTarget Salary Range: $172,724 - $227,135\nU.S. Eligibility & Compliance\nThis role may require obtaining and maintaining a U.S. government security clearance. Candidates must meet federal eligibility requirements to be considered. For more information visitSecurity Clearances - United States Department of State\nApplicants must meet eligibility requirements for access to export-controlled information as defined by U.S. export control laws, including EAR and ITAR. For more information visit theBureau of Industry and Security and the Directorate of Defense Trade Controls.\nMattermost is an EEO Employer, we are a remote-first, open-source company.\nWe are continually working to expand our hiring in more countries and regions, ensuring compliance with local laws and regulations, which takes time.\nMattermost values your unique perspective-we welcome all applicants. We encourage individuals from all backgrounds to apply and are committed to assessing candidates based on their skills and qualifications. We do not tolerate discrimination against staff or applicants based on race, religion, national origin, age, disability, pregnancy status, veteran status, or other personal characteristics.\nIf you require accommodations during the interview process, please let us know-we’re happy to assist.","description_format":"text","description_chars":6941,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["National Security","Military Communication","Team Communication & Collaboration"],"lifecycle":[{"event":"open","at":"2026-08-26T18:39:47Z"}],"visa":[],"liveness":{"score":74,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.826,"p_room":0.9,"age_days":50,"expected_fill_days":136,"reasons":["conf:2","win:mid"],"computed_at":"2026-10-16T05:45:00Z"},"pay":{"stated_usd_annual":227135,"is_top_pay":false},"html_url":"https://alion.io/job/mattermost-staff-full-stack-engineer","json_url":"https://alion.io/job/mattermost-staff-full-stack-engineer.json","meta":{"generated_at":"2026-10-16T18:59:42Z","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":4441,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-17T00:00:00Z"}},"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":38744},"rest":"https://alion.io/mcp/rest/get_company?id=38744"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmattermost-staff-full-stack-engineer"},{"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%2Fmattermost-staff-full-stack-engineer"},{"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%2Fmattermost-staff-full-stack-engineer"},{"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/mattermost-staff-full-stack-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmattermost-staff-full-stack-engineer"}]}