{"id":3086556,"url":"https://alion.io/job/vivid-resourcing-api-integration-engineer-electronic-cash-register","title":"API Integration Engineer (Electronic Cash Register)","company":{"id":4412973,"name":"Vivid Resourcing","domain":"vividresourcing.com","url":"https://alion.io/company/vivid-resourcing","size_band":"11-50","is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":{"grade":"B","score":75,"open_postings":117,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-04T06:34:25Z"}},"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":"inferred","locations":[],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Jira","optional":false}],"status":"live","first_seen_at":"2026-08-24T13:55:26Z","employer_posted_date":"2026-08-24","last_verified_at":"2026-10-22T13:46:27Z","board_verified":false,"closed_at":null,"days_open":71,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":71},"description":"For a payments customer, we are searching for a freelance API Integration Engineer to join the technical team in Brussel. You will support Electronic Cash Register (ECR) integrations. As an API Integration Engineer, your primary responsibility is to design, maintain, and optimize integrations with external clients, with a specific focus on ECR API integration at the protocol level (VIC, CTEP).\nThis role requires a blend of technical expertise, strong communication skills, and problem-solving ability. You will serve as a technical liaison between engineering teams and customers/partners, helping to troubleshoot and resolve integration issues, and to prevent them from arising in the future.\nResponsibilities\nProvide technical support and hands-on integration assistance for ECR API Integration projectTroubleshoot and resolve issues related to API connectivity and system interoperabilityCollaborate with development and QA teams to ensure robust integration solutionsMonitor system performance and diagnose potential issues before they escalateCommunicate effectively in English with clients and internal teamsManage project-related communications, deliverables, and status updatesUse Jira for issue tracking and project management Profile\nGood communication skills - fluent in Dutch or French and EnglishOpen-minded and flexibleStrong technical background (HW/SW environment) Experience with API integrationsFamiliarity with Jira and agile project practicesReady to work in an international 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