{"id":1318160,"url":"https://alion.io/job/zalo-senior-software-engineer-zalo","title":"Senior Software Engineer, Zalo","company":{"id":183385,"name":"Zalo","domain":"zalo.me","url":"https://alion.io/company/zalo-2","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Career site","truth_index":{"grade":"B","score":84,"open_postings":32,"ghost_share":0,"stale_share":0.438,"repost_share":0,"time_to_fill_p50_days":76,"computed_at":"2026-10-19T05:45:15Z"}},"role":"Backend","role_family":"Backend","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":["Ho Chi Minh City, Vietnam"],"countries":["VN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":13000,"max_usd":39000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":6933},"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Android SDK","optional":false},{"name":"GCD","optional":false},{"name":"iOS SDK","optional":false},{"name":"Java","optional":false},{"name":"Kotlin","optional":false},{"name":"Objective-C","optional":false},{"name":"Swift","optional":false},{"name":"Swift Concurrency","optional":false},{"name":"C++","optional":true},{"name":"Dart","optional":true},{"name":"Flutter","optional":true},{"name":"JavaScript","optional":true},{"name":"React Native","optional":true},{"name":"React.js","optional":true}],"status":"live","first_seen_at":"2026-07-14T00:00:00Z","employer_posted_date":"2026-09-26","last_verified_at":"2026-10-19T18:43:52Z","board_verified":true,"closed_at":null,"days_open":97,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":97},"description":"As a member of the Platform Team, your primary responsibility is to develop and maintain core instant systems (real-time/instant experiences) with a strong emphasis on deep technical know-how and algorithmic/problem-solving capability.\nThis role is open to candidates with a strong mobile background in either iOS or Android\nWhat you will do\nDesign, develop, and optimize high-performance mobile platform components and core functionalities (iOS/Android), with minimal reliance on third-party libraries;\nTackle complex technical challenges using strong algorithmic and analytical skills, ensuring performance, reliability, and scalability at platform level;\nContinuously explore and integrate new technologies, frameworks, and best practices to enhance Zalo’s instant platform efficiency and developer productivity;\nCollaborate with cross-functional teams (Product, Design, Backend, QA, etc.) to implement and refine product features with a platform-first mindset (reusable, stable, long-term maintainable).\nWhat you need\n2+ years of software development experience with strong exposure to core system architecture and platform-level thinking;\nStrong proficiency in either Android (Java/Kotlin, Android SDK, app/framework internals, tooling) or iOS (Swift/Objective-C, iOS SDK, runtime fundamentals, tooling);\nSolid knowledge of algorithms, data structures, and OOP;\nHands-on experience with memory management and multithreading/concurrency: Android: JVM/ART memory behavior, threading, concurrency primitives, iOS: ARC, retain cycles, GCD/OperationQueue/Swift Concurrency;\nExperience in performance optimization (profiling, tracing, CPU/memory/battery/network optimization) is highly desirable;\nProactive, open-minded, strong sense of ownership, and eager to learn and grow;\nNice to have\nC/C++ knowledge (useful for low-level system work, performance-critical modules, native integrations);\nFamiliarity with the core functionality of cross-platform frameworks such as Flutter or React Native (integration patterns, performance trade-offs);\nStrong research skills with the ability to quickly adapt to technologies beyond mobile (e.g., networking/real-time systems, runtime optimization, platform tooling).","description_format":"text","description_chars":2205,"description_truncated":false,"requirements":{"experience_years_min":2,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-09-26T20:12:57Z"}],"visa":[],"liveness":{"score":31,"band":"fade","label":"Fading","p_open":1,"p_active":0.704,"p_room":0.44,"age_days":97,"expected_fill_days":76,"reasons":["conf:2","velocity","win:tail","crowd:"],"computed_at":"2026-10-19T05:45:15Z"},"pay":null,"html_url":"https://alion.io/job/zalo-senior-software-engineer-zalo","json_url":"https://alion.io/job/zalo-senior-software-engineer-zalo.json","meta":{"generated_at":"2026-10-19T18:50:50Z","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":14844,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-20T00:00:00Z"}},"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":183385},"rest":"https://alion.io/mcp/rest/get_company?id=183385"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fzalo-senior-software-engineer-zalo"},{"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%2Fzalo-senior-software-engineer-zalo"},{"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%2Fzalo-senior-software-engineer-zalo"},{"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/zalo-senior-software-engineer-zalo\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fzalo-senior-software-engineer-zalo"}]}