{"id":4175407,"url":"https://alion.io/job/due-software-engineer-senior-back-end-cards","title":"Software Engineer (Senior, Back-End) - Cards","company":{"id":2213023,"name":"Due","domain":"opendue.com","url":"https://alion.io/company/opendue","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Notion","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Go","optional":false},{"name":"Java","optional":false},{"name":"Kotlin","optional":false},{"name":"TypeScript","optional":false}],"status":"live","first_seen_at":"2026-11-12T02:39:11Z","employer_posted_date":null,"last_verified_at":"2026-11-12T02:39:11Z","board_verified":false,"closed_at":null,"days_open":0,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":0},"description":"Due is looking for a Senior Back-End Software Engineer to build card issuing acquiring and push-to-card services integrate card processors and schemes and design ledger reconciliation and dispute handling for card transactions\n\nYou will build the cards stack for stablecoin-backed card issuing, card acquiring and push-to-card. You will work on services that authorise, clear and settle card transactions against stablecoin balances, and on the APIs platforms use to launch card programs.\n\nResponsibilitiesBuild back-end services for card issuing, acquiring and push-to-card\nIntegrate card processors and schemes, including authorisation, clearing and settlement flows\nDesign ledger, reconciliation and dispute handling for card transactions\nBuild Cards APIs and webhooks for platform clients\nWork with Compliance and Operations on fraud controls and program requirements\nOwn reliability and observability of card-critical services\n\nRequirements4+ years of experience in back-end software development\nExperience across Golang / Java / Kotlin / TypeScript or similar\nInterest to learn and develop in Golang\nExperience building reliable distributed systems\nQuick learner, ready to work in a fast-paced environment\nInterest in payments infrastructure and blockchain technology\nFluent English\n\nBenefits28 days of paid holidays\nStock option grants\nWork flexibly and autonomously","description_format":"text","description_chars":1373,"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":["Payment Processing & Gateways","Stablecoins"],"lifecycle":[{"event":"open","at":"2026-11-12T15:54:10Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":27,"reasons":["seen:0","win:early"],"computed_at":"2026-11-12T18:08:28Z"},"pay":null,"html_url":"https://alion.io/job/due-software-engineer-senior-back-end-cards","json_url":"https://alion.io/job/due-software-engineer-senior-back-end-cards.json","meta":{"generated_at":"2026-11-12T18:08:28Z","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":38085,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-13T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":2213023},"rest":"https://alion.io/mcp/rest/get_company?id=2213023"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fdue-software-engineer-senior-back-end-cards"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"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%2Fdue-software-engineer-senior-back-end-cards"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Fdue-software-engineer-senior-back-end-cards"},{"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/due-software-engineer-senior-back-end-cards\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fdue-software-engineer-senior-back-end-cards"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4175407}},{"tool":"search_jobs","arguments":{"company":"opendue.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4175407},"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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