{"id":122399,"url":"https://alion.io/job/duolingo-blog-senior-android-engineer-client-platform-application-stability-and-performance","title":"Senior Android Engineer, Client Platform - Application Stability and Performance","company":{"id":19161,"name":"Duolingo","domain":"duolingo.com","url":"https://alion.io/company/duolingo-blog","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"A","score":86,"open_postings":14,"ghost_share":0,"stale_share":0.571,"repost_share":0,"time_to_fill_p50_days":51,"computed_at":"2026-10-21T05:46:15Z"}},"role":"Mobile","role_family":"Mobile","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["New York, United States","Pittsburgh, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":182800,"max":247300,"currency":"USD","period":"year","gross":null,"usd_annual":247300},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"AI Agents","optional":false},{"name":"Jetpack Compose","optional":false},{"name":"Kotlin","optional":false},{"name":"Kotlin Coroutines","optional":false},{"name":"Sentry","optional":false}],"status":"closed","first_seen_at":"2026-08-25T13:19:51Z","employer_posted_date":"2026-10-02","last_verified_at":"2026-10-19T22:26:24Z","board_verified":false,"closed_at":"2026-10-19T22:26:24Z","days_open":55,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":55},"description":"Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in!\nAt Duolingo, you’ll join a team that cares about finding innovative solutions to complex technical problems, running countless experiments (300+ at a time!) with our massive user base to make data-driven decisions, and educating our users and employees alike. You’ll have limitless learning opportunities, mentorship and collaboration with world-class minds, and a variety of projects with large scopes - while doing work that’s both fun and meaningful. \nJoin our life-changing mission to develop education for our half a billion (and growing!) learners around the world.\nAbout the role...\nAs an Android engineer on our Application Stability and Performance team you’ll own the stability and performance of the Duolingo Android Learning app for millions of learners. \nThis team builds the tooling other engineers depend on to keep the app performant like AI agent driven crash and memory analysis, coroutine system tracing, and Macrobenchmark suites that catch regressions before they ship. You'll also own the performance metrics that feed into our experiment analyses and help ensure hundreds of concurrent experiments surface any performance issues or regressions.\n You will...\nLead architectural initiatives to fix the slowest parts of the app, from startup to critical learning flows\nOwn and evolve our performance tooling with tracing, benchmarking, and automated regression detection\nServe as a bridge between Client Platform and Product feature teams, helping them understand and act on the performance data we provide\nFoster a culture of engineering excellence around performance and mentor engineers of all experience levels\n You have...\nWorked on and shipped large scale Android applications\nExperience identifying the root cause and resolving ANRs, memory leaks, dropped frames, and complex crashes\nStrong Kotlin skills and deep familiarity with coroutines, Jetpack Compose, and modern architecture patterns\nExperience optimizing startup time, memory, and network usage for low-memory devices\nStrong problem-solving skills and a passion for tackling difficult challenges\n⭐ Exceptional candidates will have...\nExpertise in Android tracing tooling like the AndroidX Tracing Library and Perfetto\nExperience with crash observability tooling like Sentry and Android Vitals\nThe offered salary is dependent upon several factors, including work experience, skills, and internal peer comparisons. The posted range is subject to change in the future. For this role, base salary is supplemented by equity compensation. We encourage you to talk with your recruiter for more information related to compensation for this role!\nSalary Range:\n$182,800—$247,300 USD\nBenefits: Take a peek at how we care for our employees' holistic well-being with our benefits here.\nJob Alerts: Sign up for job alerts here.\nAccommodations: We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact .\nEqual Employment Opportunity: Duolingo is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.\nFraud Warning: Unfortunately, there is a rise in scammers pretending to be real Duolingo employees. Duolingo and our employees will never ask for your Social Security number, bank details, or passport info, and we’ll never ask you to deposit a check, purchase equipment, or exchange money during the interview process. Real Duolingo employees always use an email that ends in @duolingo.com or @recruiting.duolingo.com. Stay alert and double-check these details before sharing any information.\nBy applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice.","description_format":"text","description_chars":4242,"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"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Language Learning","E-learning"],"lifecycle":[{"event":"open","at":"2026-08-25T13:19:51Z"},{"event":"close","at":"2026-10-19T22:26:24Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 104 · green card filings: 19","filings_12m":104,"filings_prev_12m":41,"green_card_filings_12m":19,"median_offered_wage_usd":158638,"route":null,"cap_exempt":false,"checked_at":"2026-10-15T11:24:14+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)","US Department of Labor: PERM disclosure data (green cards)"],"filings_for_role_12m":76}],"liveness":null,"pay":{"stated_usd_annual":247300,"is_top_pay":true},"html_url":"https://alion.io/job/duolingo-blog-senior-android-engineer-client-platform-application-stability-and-performance","json_url":"https://alion.io/job/duolingo-blog-senior-android-engineer-client-platform-application-stability-and-performance.json","meta":{"generated_at":"2026-10-21T08:34:09Z","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":12144,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-22T00:00:00Z"}},"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":19161},"rest":"https://alion.io/mcp/rest/get_company?id=19161"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fduolingo-blog-senior-android-engineer-client-platform-application-stability-and-performance"},{"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%2Fduolingo-blog-senior-android-engineer-client-platform-application-stability-and-performance"},{"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%2Fduolingo-blog-senior-android-engineer-client-platform-application-stability-and-performance"},{"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/duolingo-blog-senior-android-engineer-client-platform-application-stability-and-performance\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fduolingo-blog-senior-android-engineer-client-platform-application-stability-and-performance"}]}