{"id":4231110,"url":"https://alion.io/job/upplabs-senior-api-integration-lead-integration-architect","title":"Senior API Integration Lead / Integration 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API","optional":false}],"status":"live","first_seen_at":"2026-11-13T09:41:35Z","employer_posted_date":null,"last_verified_at":"2026-11-13T09:41:35Z","board_verified":false,"closed_at":null,"days_open":0,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":0},"description":"Location: Remote\n\nEnglish: B2+\n\nLevel: Senior\n\nFormat: Full-time, Outstaff\n\nEngagement: 30–40 hours per week\n\nContract: 6+ months with the possibility of extension\n\nCompensation: $30–40/hour (Gross)\n\nTime Zone: Several hours of overlap with US Eastern Time (ET)\n\nStart: ASAP\n\nAbout the Project\n\nWe are looking for a Senior API Integration Lead / Integration Architect to join our international client's project on an outstaff basis.\n\nThe project focuses on integrating Core GMS with external systems related to competitions, rankings, federations, training, and payments.\n\nThe main focus is on designing and implementing reliable API integrations, ensuring consistent data exchange between different systems, and preventing duplicate records.\n\nResponsibilities\n\nDesign and implement API integrations between Core GMS and external systems.\n\nWork with REST APIs, authentication protocols, webhooks, and messaging queues.\n\nEnsure reliable data exchange and consistency across integrated systems.\n\nImplement idempotency mechanisms and record-matching logic to prevent duplicate records.\n\nParticipate in integration testing, including contract testing.\n\nSupport and troubleshoot integrations in production environments.\n\nRequirements\n\n5+ years of experience in API integrations.\n\nStrong understanding of REST APIs.\n\nHands-on experience with OAuth2 / OIDC.\n\nKnowledge of OpenAPI specifications.\n\nExperience working with webhooks and messaging queues.\n\nUnderstanding of idempotency principles and data synchronization between systems.\n\nExperience with contract testing.\n\nExperience designing record-matching mechanisms to prevent duplicate records across different systems.\n\nPractical experience in designing, testing, and supporting integration solutions in production environments.\n\nEnglish level B2+ for communication with the client and technical teams.\n\nAvailability to work with several hours of overlap with US Eastern Time (ET).\n\nImportant: We are particularly interested in candidates who can demonstrate their personal contribution to integration design, testing, and ongoing production support.\n\nWhat We Offer\n\n🚀 Remote / Full-time / Long-term collaboration\n\n🤝 The opportunity to work on an international client project\n\n💡 High level of autonomy and the opportunity to have a direct impact on your work\n\n🏖 21 paid vacation days + 10 paid sick leave days + Ukrainian public holidays\n\n🗣 Individual English lessons\n\n💊 Medical insurance for employees based in Ukraine (after 3 months of cooperation)\n\n📚 Safari Books Online subscription\n\n🧠 Corporate psychologist sessions\n\n📚 $300 annual learning and professional development budget\n\n🎓 Trainings, workshops, and mentorship opportunities\n\nRecruitment Process\n\nCV Review — We review your experience and share relevant CVs with the client for initial consideration.\n\nTechnical Assessment — If your profile is approved, we will arrange a technical assessment with the client to evaluate your practical experience and expertise in API integrations.","description_format":"text","description_chars":2991,"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":["Health insurance","Professional development"],"hiring_locations":[{"name":"Ukraine","iso":"UA","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Software","Custom Software 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