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Build tool/alert system to help managing server backend.\nAnalyze / Detect bottleneck in database to improve performance, throughput.\nDesign database cluster for new feature of Zalo chat message system.\nBuild tool to help maintain/manage microservice system.\nWhat you need\n3+ years experience in backend systems.\nExperience in linux operating system, async i/o, event driven design.\nExperience with NoSQL database, understand disk I/O, network effect on database.\nKnowledge in distributed, microservice system, RPC (gRPC/Thrift), message queue (kafka/...)\nShould have fluency in C++/Java.","description_format":"text","description_chars":849,"description_truncated":false,"requirements":{"experience_years_min":3,"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":["Messaging Apps","Social Networks"],"lifecycle":[{"event":"open","at":"2026-10-15T10:53:17Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":0,"expected_fill_days":76,"reasons":["conf:0","velocity","win:early"],"computed_at":"2026-10-16T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/zalo-senior-software-engineer-cjava","json_url":"https://alion.io/job/zalo-senior-software-engineer-cjava.json","meta":{"generated_at":"2026-10-16T14:30:49Z","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":14104,"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":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-cjava"},{"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-cjava"},{"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-cjava"},{"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-cjava\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fzalo-senior-software-engineer-cjava"}]}