{"id":1222551,"url":"https://alion.io/job/rosper-uriiransuenjinia","title":"フリーランスエンジニア","company":{"id":2677938,"name":"Prosper Systems","domain":"prosper-s.co.jp","url":"https://alion.io/company/prosper-s","size_band":null,"is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":"HERP","truth_index":{"grade":"B","score":75,"open_postings":6,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-01T06:10:25Z"}},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"freelance","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":500000,"max":1200000,"currency":"JPY","period":"month","gross":null,"usd_annual":91668},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"AWS","optional":false},{"name":"JavaScript","optional":false},{"name":"Linux","optional":false},{"name":"PHP","optional":false},{"name":"Python","optional":false},{"name":"Ruby","optional":false},{"name":"Rust","optional":false},{"name":"C#","optional":true}],"status":"live","first_seen_at":"2024-02-18T07:13:21Z","employer_posted_date":"2024-02-18","last_verified_at":"2026-11-01T10:10:14Z","board_verified":true,"closed_at":null,"days_open":987,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":986},"description":"エンジニアとしての豊富な経験を有するメンバーが案件相談します｜フリーランスエンジニア\nDescription\nWeb・オープン系をはじめ、組込・制御系や汎用系のプロジェクトなど幅広い領域でプロジェクトがあります。\n◎大手生保・損保会社の業務効率化システム開発\n◎大手ゲーム会社の店舗管理システム開発\n◎大手航空会社のコールセンターAI開発（IBM Watson利用）\n◎チャットボットによるAI開発（IBM Watson利用）\n◎次世代ゲーム機のオーディオ評価ソフト開発\n◎デジタルカメラ用ネットワークデバイス（通信機能）開発\n◎SaaSを提供するスタートアップのプロダクト開発\n※担当工程は、要件定義や基本設計などの上流工程から開発・保守まで幅広いです。\n[開発環境] Java、C、C＃、VB.NET、C＋＋、Visual C、Visual C＋＋、PHP、JavaScript、Ruby、Rust、AWS、Linux、Python\nRequirements\nWeb・オープン系をはじめ、組込・制御系や汎用系のプロジェクトなど幅広い領域でプロジェクトがあります。\n◎大手生保・損保会社の業務効率化システム開発\n◎大手ゲーム会社の店舗管理システム開発\n◎大手航空会社のコールセンターAI開発（IBM Watson利用）\n◎チャットボットによるAI開発（IBM Watson利用）\n◎次世代ゲーム機のオーディオ評価ソフト開発\n◎デジタルカメラ用ネットワークデバイス（通信機能）開発\n◎SaaSを提供するスタートアップのプロダクト開発\n※担当工程は、要件定義や基本設計などの上流工程から開発・保守まで幅広いです。\n[開発環境] Java、C、C＃、VB.NET、C＋＋、Visual C、Visual C＋＋、PHP、JavaScript、Ruby、Rust、AWS、Linux、Python\nPreferred Experiences\nWe are looking for\nWorking Conditions\nSalary\nプロジェクトに応じる。\n・当社案件の月額単価：50万円〜120万円\n・当社案件の平均単価：65万円\nLocation\nJob Type\nWork hours\nProbation period\nBenefits","description_format":"text","description_chars":967,"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":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Consulting & Digital Transformation","Custom Software Development"],"lifecycle":[{"event":"open","at":"2026-09-25T12:38:35Z"},{"event":"open","at":"2026-09-25T15:22:58Z"},{"event":"open","at":"2026-10-12T05:37:38Z"}],"visa":[],"liveness":{"score":4,"band":"cold","label":"Long shot","p_open":1,"p_active":0.129,"p_room":0.28,"age_days":986,"expected_fill_days":24,"reasons":["conf:0","win:tail","crowd:"],"computed_at":"2026-11-01T06:10:25Z"},"pay":{"stated_usd_annual":91668,"is_top_pay":false},"html_url":"https://alion.io/job/rosper-uriiransuenjinia","json_url":"https://alion.io/job/rosper-uriiransuenjinia.json","meta":{"generated_at":"2026-11-01T11:55:39Z","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":18466,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-02T00:00:00Z"}},"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":2677938},"rest":"https://alion.io/mcp/rest/get_company?id=2677938"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Frosper-uriiransuenjinia"},{"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%2Frosper-uriiransuenjinia"},{"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%2Frosper-uriiransuenjinia"},{"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/rosper-uriiransuenjinia\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Frosper-uriiransuenjinia"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":1222551}},{"tool":"search_jobs","arguments":{"company":"prosper-s.co.jp","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":1222551},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. Docs: https://alion.io/developers"}}