Senior Java Backend Developer

Job Title: Senior Java Backend DeveloperLocation: Durham, NC 27701Work Arrangement: Remote (Local to Raleigh-Durham area preferred | Occasional travel 1-2 days, 1-2 times within 6 months to FL or NC)Employment Type: ContractDuration: 6+ MonthsDomain: Automotive Tech / Fintech & Vehicle Management SystemsPay Rate: $51.00/hr W2 | $62.00/hr C2CApplication Deadline: August 19, 2026SKILLS REQUIREDPrimary (Must-Have):• Strong backend development experience using Java/Spring Boot or similar frameworks | 14+ years of professional engineering experience.• Proven expertise in REST API design and refactoring | Relational database design, schema migrations, and complex indexing.• Strong implementation background in authentication and authorization frameworks (JWT | OAuth | federated identity | Firebase Auth).• Experience building middleware components such as request interceptors, filters, and shared request contexts.Secondary (Good to Have):• Experience with payment systems and tokenization | MasterCard SRC or similar protocols.• Prior work architecting multi-tenant or hierarchical data models (account -> asset -> profile).• Knowledge of event-driven integrations and callback-based third-party systems.• Familiarity with API gateways and distributed security validation patterns.POSITION OVERVIEWOperating within the platform engineering organization and reporting directly to technical leadership, the Senior Backend Developer will own an end-to-end platform refactoring initiative. This role is tasked with modernizing core services to support federated authentication via Firebase and restructuring multi-entity vehicle management data models. The engineer will solve critical challenges around account-to-vehicle-to-profile relationships, ensuring data integrity, backward compatibility, and robust API performance.ROLES & RESPONSIBILITIES• Design and implement new domain entities (user_account | vehicle_profile) and execute complex database migrations, schema refactoring, and data backfill logic.• Refactor REST APIs and middleware layers to support account, vehicle, and profile-level operations alongside custom authentication request interceptors.• Integrate Firebase Authentication and transition from legacy client-credential models while enforcing account-ownership authorization rules across all scopes.• Rework core business logic for vehicle enrollment, profile creation, cryptographic signing key management, and payment/card binding workflows.• Manage third-party integrations with Firebase, MasterCard SRC, and payment middleware while executing rigorous integration and regression test plans.BENEFITSMedical | Dental | Vision | 401(k)EEOC Compliance:We are an equal opportunity employer, and all qualified applicants will receive consideration for employment.DISCLAIMERAI Usage Policy: Pacer Group uses AI to assist in screening applications. Final hiring decisions are made by human recruiters based on qualifications and experience.