{"id":1710736,"url":"https://alion.io/job/mujin-frontend-engineerreact-native","title":"Frontend Engineer（React Native）","company":{"id":9678,"name":"Mujin","domain":"mujin.co.jp","url":"https://alion.io/company/mujin","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"A","score":88,"open_postings":48,"ghost_share":0.125,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":222,"computed_at":"2026-10-08T05:49:30Z"}},"role":"DevOps","role_family":"DevOps","seniority":"junior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Tokyo, Japan"],"countries":["JP"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Babylon.js","optional":false},{"name":"C++","optional":false},{"name":"JavaScript","optional":false},{"name":"Linux","optional":false},{"name":"Python","optional":false},{"name":"React.js","optional":false},{"name":"TypeScript","optional":false}],"status":"live","first_seen_at":"2026-01-15T06:52:54Z","employer_posted_date":"2026-01-15","last_verified_at":"2026-10-09T01:14:36Z","board_verified":true,"closed_at":null,"days_open":266,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":265},"description":"Team Introduction\nAs a Frontend Engineer on Mujin’s Warehouse Execution System (WES) & Fleet Management team, you will develop user-facing applications used daily in warehouse operations. Your work will shape how operators interact with warehouse systems through browser-based interfaces and industrial Android devices.\nYou will build reliable, responsive, and intuitive interfaces for demanding production environments, where stability, performance, and usability are critical. Working closely with backend engineers, product managers, designers, and operations teams, you will deliver features that support warehouse workflows and help users monitor and manage automated operations.\nThe role spans frontend architecture, reusable UI components, backend integration, and development tooling, with opportunities to contribute across the application stack.\nResponsibilities\n- Design, develop, and maintain user interfaces for WES and fleet management applications across web and industrial Android devices.\n- Build reusable, high-performance UI components that support real-time operational data and long-running warehouse workflows.\n- Collaborate with designers and product managers to translate operational requirements into intuitive, accessible user experiences.\n- Integrate frontend applications with backend APIs and collaborate with backend engineers to deliver end-to-end features.\n- Improve application stability, responsiveness, and maintainability through profiling, debugging, and refactoring.\n- Develop and improve testing, localization, build, and release pipelines.\n- Investigate and resolve production issues in collaboration with engineering and operations teams.\n- Participate in code reviews and share knowledge across the team.\n- Occasionally travel to customer sites in Japan and abroad to understand operational needs and support deployment.\nMinimum Requirements\n2+ years of professional software development experience.\nA bachelor’s degree or higher in Computer Science, Computer Engineering, or a related field, or equivalent academic or professional experience.\nProficiency in Python.\nProduct development experience using desktop, mobile, or web UI frameworks.\nFamiliarity with Linux software development and toolchains.\nEnglish communication skills sufficient for technical discussions and collaboration.\nPreferable Requirements\nProduct development experience using React, Babylon.js, or WebGL.\nProficiency in TypeScript and JavaScript.\nKnowledge of asynchronous programming and threading.\nFamiliarity with localization and translation pipelines.\nExperience developing C++ and Python addons.\nFull-stack development experience.\nAttractiveness\n- Build software that directly supports real-world warehouse operations. You will see your work used by operators and contribute to interfaces that make complex automation easier to understand and manage.\n- Our team works collaboratively, reviews ideas openly, and encourages continuous learning. You will have opportunities to take ownership from design through deployment, solve challenging technical problems, and work across frontend and backend systems alongside engineers with deep expertise in industrial automation.\nInterview Process:\nCoding Assessment: Initial technical evaluation.\nHR Interview: Discussion with Human Resources.\nTechnical Interview: One or two rounds with the frontend team's manager.\n Final Interview: Cultural fit interview with hiring manager.","description_format":"text","description_chars":3440,"description_truncated":false,"requirements":{"experience_years_min":2,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[{"language":"English","level":"Upper-Intermediate (B2)","optional":false}]},"benefits":["Continuous learning"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Logistics & Warehouse Robotics","Industrial Robotics","Robotic Software & Control Systems"],"lifecycle":[{"event":"open","at":"2026-10-02T17:17:21Z"}],"visa":[],"liveness":{"score":29,"band":"fade","label":"Fading","p_open":1,"p_active":0.667,"p_room":0.44,"age_days":265,"expected_fill_days":222,"reasons":["conf:0","velocity","win:tail","crowd:junior"],"computed_at":"2026-10-08T05:49:30Z"},"pay":null,"html_url":"https://alion.io/job/mujin-frontend-engineerreact-native","json_url":"https://alion.io/job/mujin-frontend-engineerreact-native.json","meta":{"generated_at":"2026-10-09T03:44:35Z","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","counted_by":"address","units_charged":1,"used_today":2836,"day_limit":5000,"remaining_today":2164,"minute_limit":60,"resets_at":"2026-10-10T00:00:00Z"}},"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":9678},"rest":"https://alion.io/mcp/rest/get_company?id=9678"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmujin-frontend-engineerreact-native"},{"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%2Fmujin-frontend-engineerreact-native"},{"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%2Fmujin-frontend-engineerreact-native"},{"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/mujin-frontend-engineerreact-native\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmujin-frontend-engineerreact-native"}]}