{"id":1666463,"url":"https://alion.io/job/mozilla-ai-senior-software-engineer-add-ons","title":"Senior Software Engineer, Add-Ons","company":{"id":16704,"name":"Mozilla.ai","domain":"mozilla.ai","url":"https://alion.io/company/mozilla-ai","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"inferred_payroll_markers","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":[],"countries":[],"hiring_countries":["US"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":85000,"max_usd":213000,"period":"year","method":"global_role_seniority_cell","sample_n":6933},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Django","optional":false},{"name":"GCP","optional":false},{"name":"MySQL","optional":false},{"name":"Python","optional":false},{"name":"TypeScript","optional":false}],"status":"live","first_seen_at":"2026-10-02T03:42:00Z","employer_posted_date":null,"last_verified_at":"2026-10-02T03:42:00Z","board_verified":false,"closed_at":null,"days_open":15,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":15},"description":"To learn the Hiring Ranges for this position, please select your location from the Apply Now dropdown menu.\nTo learn more about our Hiring Range System, please click this link.\n\nWhy 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.\n The 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.\n\nAbout this team and role:\naddons.mozilla.org (AMO) is the foundation of the Firefox add-ons ecosystem. It’s a showcase for developers to publish and grow their extensions, and a place of discovery for millions of users who customize Firefox to make it their own. Behind the scenes are the DevHub which enables developers to manage their extensions. To manage the ecosystem there are a series of Reviewer tools and automated moderation systems. \n\nAs a Senior Software Engineer - Operations, you’ll bring a passion for crafting resilient systems that accelerate our review and operations team to provide a first-class experience for Add-on developers. You’ll work closely with engineers, reviewers, developer relations, and Add-ons leadership to turn ideas into polished features, modernize the platform and its architecture, and see your work reach millions of people around the world.\n\nWhat you’ll do: \n\nDeliver major features and architectural improvements across the Add-ons stack, including automated moderation pipelines, Reviewer tools, and DevHub.\n\nCreate robust observability systems and data-backed insights.\n\nProvide peer feedback, share knowledge and help others grow.\n\nImprove platform reliability through deployments, monitoring, and incident response.\n\nHelp keep the platform safe and trustworthy, with attention to security and user trust.\n\nStep in to resolve issues impacting users and developers, from small bugs to larger incidents.\n\nCollaborate with designers, product managers, QA, and community contributors to deliver end-to-end improvements.\n\nContribute in the open through pull requests, code reviews, and discussions.\n\nWork on:\n\nFull stack development: React/TypeScript frontends, Django backend, MySQL datastore.\n\nPlatform reliability: deployments, monitoring, and incident response on Google Cloud.\n\nFeature development: submission flows, trust and safety signals, DevHub and Reviewer tools modernization.\n\nEcosystem moderation: abuse report management, policy compliance, and ecosystem safety. \n\nOpen collaboration: We work in the open, with contributions from Mozilla staff and community members.\n\nWhat you’ll bring: \n\nExperience building modern web applications.\n\nStrong experience with Python/Django or similar backend frameworks.\n\nUnderstanding of web security principles and practices.\n\nStrong collaboration and communication skills in a distributed team environment.\n\nAdept at navigating ambiguity, exploring solutions, and shaping direction in new problem spaces.\n\nCommitment to our values:\n\nWelcoming differences\n\nBeing relationship-minded\n\nPracticing responsible participation\n\nHaving grit\n\nBonus points for:\n\nExperience in building automated security systems.\n\nExposure to cloud infrastructure (Google Cloud or similar).\n\nContributions to open source projects.\n\nExperience with policy-compliant ecosystem moderation tools.\n\nWhat you’ll get:\n\nGenerous performance-based bonus plans to all eligible employees - we share in our success as one team\n\nRich medical, dental, and vision coverage\n\nGenerous retirement contributions with 100% immediate vesting (regardless of whether you contribute)\n\nQuarterly all-company wellness days where everyone takes a pause together\n\nCountry specific holidays plus a day off for your birthday\n\nOne-time home office stipend\n\nAnnual professional development budget\n\nQuarterly well-being stipend\n\nConsiderable paid parental leave\n\nEmployee referral bonus program\n\nOther benefits (life/AD&D, disability, EAP, etc. - varies by country)\n\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.\n\nCommitment to diversity, equity, inclusion, and belonging\n\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.\n\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.\n\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.\n\nGroup: D\nReq ID: R3023\nOriginally posted on Himalayas","description_format":"text","description_chars":6596,"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 States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["AI Agents","AI Safety & Alignment","AI Development Tools","AI Evaluation & Observability"],"lifecycle":[{"event":"open","at":"2026-10-02T06:08:55Z"}],"visa":[],"liveness":{"score":59,"band":"ok","label":"Likely open","p_open":0.85,"p_active":0.771,"p_room":0.9,"age_days":15,"expected_fill_days":29,"reasons":["seen:15","velocity","win:mid"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/mozilla-ai-senior-software-engineer-add-ons","json_url":"https://alion.io/job/mozilla-ai-senior-software-engineer-add-ons.json","meta":{"generated_at":"2026-10-17T18:52:22Z","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":1926,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"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":16704},"rest":"https://alion.io/mcp/rest/get_company?id=16704"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmozilla-ai-senior-software-engineer-add-ons"},{"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-ai-senior-software-engineer-add-ons"},{"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-ai-senior-software-engineer-add-ons"},{"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-ai-senior-software-engineer-add-ons\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmozilla-ai-senior-software-engineer-add-ons"}]}