{"id":614967,"url":"https://alion.io/job/hudsonmanpower-senior-software-engineer-2","title":"Senior Software Engineer (2)","company":{"id":678128,"name":"Hudson Manpower","domain":"hudsonmanpower.com","url":"https://alion.io/company/hudsonmanpower","size_band":"1001-5000","is_staffing_agency":true,"is_intermediary":false,"listed_via":null,"ats_vendor":"Recruitee","truth_index":{"grade":"A","score":94,"open_postings":115,"ghost_share":0,"stale_share":0.035,"repost_share":0,"time_to_fill_p50_days":184,"computed_at":"2026-09-24T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Cincinnati, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":55,"max":60,"currency":"USD","period":"hour","gross":null,"usd_annual":120000},"salary_estimate":null,"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"API Gateway","optional":false},{"name":"Java","optional":false},{"name":"Rest API","optional":false},{"name":"Spring Boot","optional":false},{"name":"Apache Kafka","optional":true},{"name":"CI/CD","optional":true},{"name":"SQL","optional":true}],"status":"live","first_seen_at":"2026-08-25T21:36:45Z","employer_posted_date":"2026-08-25","last_verified_at":"2026-09-24T20:54:23Z","board_verified":true,"closed_at":null,"days_open":30,"trust":{"level":"ok","repost_count":0,"flags":[],"days_open":29},"description":"Position Overview\nWe are seeking a Senior/Advanced Java Developer to support a newly established team working on an Omnichannel Payment Platform (OPP) and a new Point-of-Sale (POS) system. The consultant will help stabilize the POS environment and integrate it with the OPP platform.\nThe ideal candidate will have strong hands-on experience with Java, Spring, Spring Boot, REST APIs, backend microservices, API Gateway integrations, enterprise payment systems, and POS environments. Experience working in PCI-scoped or security-sensitive environments is highly valued.\nTop Required Skills\n7+ years of senior-level Java development experience\n\nStrong hands-on experience with Java, Spring, and Spring Boot\n\nExperience developing RESTful APIs and backend microservices\n\nExperience with API Gateway integration and enterprise system integrations\n\nHands-on Point-of-Sale (POS) experience, including POS terminals or related test environments\n\nExperience in PCI-scoped, payment, financial, or security-sensitive environments\n\nStrong ability to work onsite with cross-functional technical teams\n\nRequired Technology Stack\nJava\n\nSpring / Spring Boot\n\nREST APIs\n\nAPI Gateway\n\nMicroservices\n\nPOS Integration\n\nPCI / Secure Development Practices\n\nPreferred Skills\nKafka\n\nEvent-Driven Architecture\n\nPayment Systems\n\nCI/CD\n\nCloud\n\nContainers\n\nKey Responsibilities\nDesign, develop, and maintain backend services using Java and Spring Boot.\n\nIntegrate the new POS platform with the Omnichannel Payment Platform (OPP).\n\nDevelop and support integrations with enterprise API Gateway platforms and downstream services.\n\nTroubleshoot and stabilize POS-to-backend and payment-processing integrations.\n\nPerform hands-on testing and troubleshooting using physical POS terminals and test hardware in the onsite POS lab.\n\nDevelop secure, scalable, and highly available backend services.\n\nWork within PCI-scoped environments and follow applicable security and compliance standards.\n\nCollaborate with POS, payment, architecture, QA, DevOps, and product teams.\n\nParticipate in technical design, code reviews, troubleshooting, and architecture discussions.\n\nDevelop automated unit and integration tests.\n\nInvestigate complex integration and production issues and drive them through resolution.\n\nSupport event-driven architectures and messaging technologies as required.\n\nHelp establish development and integration practices for the OPP/POS team.\n\nImportant\nNo SQL requirement.\nRequirements\nRequired Technology Stack\nJava\n\nSpring / Spring Boot\n\nREST APIs\n\nAPI Gateway\n\nMicroservices\n\nPOS Integration\n\nPCI / Secure Development Practices\n\nPreferred Skills\nKafka\n\nEvent-Driven Architecture\n\nPayment Systems\n\nCI/CD\n\nCloud\n\nContainers\n\nKey Responsibilities\nDesign, develop, and maintain backend services using Java and Spring Boot.\n\nIntegrate the new POS platform with the Omnichannel Payment Platform (OPP).\n\nDevelop and support integrations with enterprise API Gateway platforms and downstream services.\n\nTroubleshoot and stabilize POS-to-backend and payment-processing integrations.\n\nPerform hands-on testing and troubleshooting using physical POS terminals and test hardware in the onsite POS lab.\n\nDevelop secure, scalable, and highly available backend services.\n\nWork within PCI-scoped environments and follow applicable security and compliance standards.\n\nCollaborate with POS, payment, architecture, QA, DevOps, and product teams.\n\nParticipate in technical design, code reviews, troubleshooting, and architecture discussions.\n\nDevelop automated unit and integration tests.\n\nInvestigate complex integration and production issues and drive them through resolution.\n\nSupport event-driven architectures and messaging technologies as required.\n\nHelp establish development and integration practices for the OPP/POS team.\n\nImportant\nNo SQL requirement.","description_format":"text","description_chars":3818,"description_truncated":false,"requirements":{"experience_years_min":7,"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":[],"lifecycle":[{"event":"open","at":"2026-09-10T18:29:25Z"}],"liveness":{"score":52,"band":"ok","label":"Likely open","p_open":1,"p_active":0.524,"p_room":1,"age_days":29,"expected_fill_days":184,"reasons":["conf:2","agency","velocity","win:early","comp:brand"],"computed_at":"2026-09-24T05:45:00Z"},"pay":{"stated_usd_annual":120000,"is_top_pay":false},"html_url":"https://alion.io/job/hudsonmanpower-senior-software-engineer-2","json_url":"https://alion.io/job/hudsonmanpower-senior-software-engineer-2.json","meta":{"generated_at":"2026-09-24T22:57:43Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":1186,"day_limit":5000,"remaining_today":3814,"minute_limit":60,"resets_at":"2026-09-25T00:00:00Z"}}}