{"id":3108155,"url":"https://alion.io/job/mozilla-corporation-staff-site-reliability-engineer-tools-systems","title":"Staff Site Reliability Engineer, Tools & Systems","company":{"id":1740,"name":"Mozilla Corporation","domain":"mozilla.org","url":"https://alion.io/company/mozilla","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"A","score":91,"open_postings":23,"ghost_share":0,"stale_share":0.348,"repost_share":0,"time_to_fill_p50_days":43,"computed_at":"2026-10-24T06:02:35Z"}},"role":"DevOps","role_family":"DevOps","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 Kingdom"],"countries":["GB"],"hiring_countries":["GB"],"hiring_countries_total":1,"salary":{"min":81000,"max":108000,"currency":"GBP","period":"year","gross":null,"usd_annual":144485},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"CI/CD","optional":false},{"name":"JavaScript","optional":false},{"name":"Python","optional":false},{"name":"Rust","optional":false},{"name":"Terraform","optional":false},{"name":"TypeScript","optional":false}],"status":"live","first_seen_at":"2026-10-22T19:51:19Z","employer_posted_date":"2026-10-22","last_verified_at":"2026-10-24T06:36:19Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Why Mozilla?\nMozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission - to make the internet better for people. \nThe Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders - only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms.\nAbout this team and role:\nWe are looking for an experienced and versatile software engineer to work on the tools and systems that support Firefox engineering.\nThis is a broad software engineering role spanning internal engineering systems, developer tooling, workflow automation, and the infrastructure required to operate them. We are looking for an engineer with strong software development skills and meaningful experience deploying and operating production systems.\nOur Cloud Engineering teams provide shared platforms and foundational services, while engineering teams own the applications and services they run on them. A key part of this role is helping teams succeed in that model by solving difficult operational problems, establishing standards and patterns, and building tooling and automation that makes systems easier to operate. You will also contribute directly to the software, tools, and systems that support Firefox engineering.\nYou will work across projects and technical domains, joining teams or existing efforts when needed and independently taking on problems that require focused ownership.\nWe build in the open. Open source is fundamental to how we work, and contributing back to the broader open-source ecosystem is an important part of the role.\nWhat you'll do:\nDesign, build, deploy, and operate software and systems supporting Firefox engineering.\nContribute to developer tooling, CI/CD, workflow automation, and AI-assisted development tools.\nOwn complex technical problems end-to-end across software, cloud, and operational layers, improving reliability, performance, observability, and cost efficiency.\nWork with Firefox engineering, Cloud Engineering, IT, and other teams to solve problems that span technical and organizational boundaries.\nUse telemetry, metrics, and data analysis to investigate problems and guide engineering decisions.\nContribute to architecture and technical strategy, identifying recurring problems and solutions that can be applied across teams.\nWhat you'll bring:\nStrong software engineering skills and substantial hands-on experience deploying and operating production systems are core requirements for this role. We do not expect you to be an expert in every technology or domain listed below.\nStrong programming skills in languages such as Python or JavaScript/TypeScript. Experience with C++ or Rust is useful.\nExperience building and deploying and operating production systems in cloud environments, including utilizing infrastructure as code such as Terraform.\nExperience across several areas such as CI/CD, containers and orchestration, networking, databases, observability, or developer tooling.\nExperience using data, telemetry, and metrics to investigate technical problems and make decisions.\nFamiliarity with modern AI-assisted development tools and an understanding of their capabilities, limitations, and appropriate use.\nHow you work:\nYou are comfortable jumping into unfamiliar systems and getting them into a sustainable state.\nYou enjoy moving across projects and technical domains, taking ownership of problems and looking for patterns that make the next one easier to solve.\nYou work effectively across disciplines and can translate between software, infrastructure, and operational concerns.\nYou combine hands-on engineering with systems thinking and longer-term technical judgment.\nYou communicate openly, consistently, and respectfully, and enjoy teaching and helping others build skills in unfamiliar technical areas.\nWhat you’ll get:\nGenerous performance-based bonus plans to all eligible employees - we share in our success as one team\nRich medical, dental, and vision coverage\nGenerous retirement contributions with 100% immediate vesting (regardless of whether you contribute)\nQuarterly all-company wellness days where everyone takes a pause together\nCountry specific holidays plus a day off for your birthday\nOne-time home office stipend\nAnnual professional development budget\nQuarterly well-being stipend\nConsiderable paid parental leave\nEmployee referral bonus program\nOther benefits (life/AD&D, disability, EAP, etc. - varies by country)\nAbout Mozilla \nMozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online.\nCommitment to diversity, equity, inclusion, and belonging\nMozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities, and expressions.\nWe will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at  to request accommodation.\nWe are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose.\nGroup: C\nReq ID: R3254\nHiring Ranges:\nRemote UK\n£81,000—£108,000 GBP","description_format":"text","description_chars":7086,"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":["Equity","Home office","Parental leave","Professional development"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["VPN & Proxy Services","Consumer & Utility Software"],"lifecycle":[{"event":"open","at":"2026-10-22T19:55:50Z"}],"visa":[],"liveness":{"score":99,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.993,"p_room":1,"age_days":1,"expected_fill_days":43,"reasons":["conf:3","wave","velocity","win:early"],"computed_at":"2026-10-24T06:02:35Z"},"pay":{"stated_usd_annual":144485,"is_top_pay":false},"html_url":"https://alion.io/job/mozilla-corporation-staff-site-reliability-engineer-tools-systems","json_url":"https://alion.io/job/mozilla-corporation-staff-site-reliability-engineer-tools-systems.json","meta":{"generated_at":"2026-10-24T07:55:10Z","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":11739,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-25T00:00:00Z"}},"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":1740},"rest":"https://alion.io/mcp/rest/get_company?id=1740"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmozilla-corporation-staff-site-reliability-engineer-tools-systems"},{"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%2Fmozilla-corporation-staff-site-reliability-engineer-tools-systems"},{"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%2Fmozilla-corporation-staff-site-reliability-engineer-tools-systems"},{"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/mozilla-corporation-staff-site-reliability-engineer-tools-systems\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmozilla-corporation-staff-site-reliability-engineer-tools-systems"}]}