{"id":2433507,"url":"https://alion.io/job/jamm-backend-developer","title":"Backend Developer","company":{"id":47921,"name":"Jamm","domain":"jamm-pay.jp","url":"https://alion.io/company/jamm","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"full_time","work_mode":"hybrid","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":{"min":7000000,"max":10000000,"currency":"JPY","period":"year","gross":null,"usd_annual":63870},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"Go","optional":false},{"name":"gRPC","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Terraform","optional":false}],"status":"live","first_seen_at":"2026-10-13T09:15:19Z","employer_posted_date":null,"last_verified_at":"2026-10-13T09:15:19Z","board_verified":false,"closed_at":null,"days_open":16,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":16},"description":"About us\nWe’re an early stage fintech company building a better way to pay. We’re a small team where engineers work closely with product, design, and business, and where clear thinking and clear communication matter as much as the code itself.\nWhat you’ll work on\nBackend services in Go, from data model and schema design through deployment and operation.\nSystems that coordinate multi-step processes and need to stay correct and recover cleanly when individual steps fail.\nDesign proposals and technical documents that help the team make good decisions.\nReviewing others’ designs and code, and having your own reviewed in turn.\nImproving reliability over time, and making the case for addressing tech debt before it slows us down.\nWho we’re looking for\nYou’ve worked as a backend engineer in a professional setting and can talk in detail about services you built, how they held up in production, and what you learned from them.\nYou’re strong in Go and relational database design, and you understand the trade-offs that come with distributed systems.\nYou explain complex ideas simply, in writing and in conversation, to engineers and non-engineers alike.\nYou ask for feedback on your work, take it seriously, and can point to times it changed your approach.\nYou pick up unfamiliar tools and domains quickly, and you’re comfortable being productive before you know everything.\nYou can take a goal and run with it independently, while keeping others informed without being asked.\nNice to have\nBusiness level Japanese (N2+)\nExperience taking a product from zero to production.\nExperience with workflow orchestration systems such as Temporal or AWS Step Functions.\nExperience in payments, banking, or other domains where correctness is a priority.\nExperience at an early-stage company, or a clear reason you want to be at one now.\nFamiliarity with frontend or mobile development, enough to collaborate comfortably across the stack.\nOur stack\nGo, ConnectRPC/Protobuf, Temporal, PostgreSQL, AWS, Terraform\nYou don’t need experience with all of these. We’d love to talk to someone who has gone deep on a few and learns the rest quickly.\nWhat it’s like here\nDirect access to decision makers. Good ideas get heard and acted on quickly.\nReal ownership of your work, with support from the team when you need it.\nA culture of open, honest feedback in both directions.\nHow to apply\nAlong with your resume, send a short written note about a technical problem you solved at work. Tell us what the constraints were, what you tried that didn’t work, and what you’d change today. We’d love to hear this in your own words, since how you explain your thinking matters to us as much as the problem itself.","description_format":"text","description_chars":2684,"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":[{"language":"Japanese","level":"All levels","optional":true}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Payment Processing & Gateways"],"lifecycle":[{"event":"open","at":"2026-10-13T10:02:44Z"}],"visa":[],"liveness":{"score":57,"band":"ok","label":"Likely open","p_open":0.85,"p_active":0.739,"p_room":0.9,"age_days":15,"expected_fill_days":24,"reasons":["seen:15","win:mid"],"computed_at":"2026-10-29T05:49:05Z"},"pay":{"stated_usd_annual":63870,"is_top_pay":false},"html_url":"https://alion.io/job/jamm-backend-developer","json_url":"https://alion.io/job/jamm-backend-developer.json","meta":{"generated_at":"2026-10-29T18:08:51Z","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":26871,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-30T00:00:00Z"}},"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":47921},"rest":"https://alion.io/mcp/rest/get_company?id=47921"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fjamm-backend-developer"},{"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%2Fjamm-backend-developer"},{"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%2Fjamm-backend-developer"},{"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/jamm-backend-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fjamm-backend-developer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":2433507}},{"tool":"search_jobs","arguments":{"company":"jamm-pay.jp","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":2433507},"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. 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