About this role
Senior Software Engineer, Back-End (Vault) at Collectorsuniverse. Location: California or Santa Ana or New Jersey or Texas or Florida or Japan or Shanghai or Hong Kong or Canada or Mexico or Germany or France. Role: designing systems, developing apis, mentoring engineers Requirements: 5+ years building web applications, APIs, and distributed systems; 2+ years AWS experience (serverless/event-driven); strong Java proficiency (C# a plus); use of modern AI developer tools; strong engineering fundamentals and mentorship experience. Category: Software Development Seniority: Senior Level Tools: AWS, Java, C#, Claude Code CLI, Codex, e-Verify Commitment: Full Time Workplace: Hybrid Languages: English