Senior Backend Developer – Identity & Vehicle Platform Engineering-Remote

Job Summary

We are seeking a Senior Backend Developer to design implement and refactor core platform services supporting federated authentication and a multi-entity vehicle management system. This role focuses on integrating Firebase-based identity restructuring backend data models and modernizing API layers to support scalable account vehicle and profile relationships.

We are seeking a Senior Backend Developer to design implement and refactor core platform services supporting federated authentication and a multi-entity vehicle management system. This role focuses on integrating Firebase-based identity restructuring backend data models and modernizing API layers to support scalable account vehicle and profile relationships.

• Data Model & Persistence Layer
• Design and implement new domain entities including  and  to support federated identity mapping.
• Refactor existing schemas (e.g.) to separate vehicle-level and profile-level concerns.
• Develop and execute database migrations including:
• Table creation column restructuring and foreign key repointing
• Index updates and performance optimizations
• Implement data backfill and reconciliation logic for existing records including consolidation of vehicle and profile relationships.

• Refactor REST APIs to support:
• Account-level vehicle-level and profile-level operations
• Updated relationships between entities (account-vehicles-profiles)
• Implement cross-cutting concerns:
• Request interceptors/filters for authentication and context resolution
• Shared request context updates (vehicleProfileId userAccountId)
• Enhance API contracts OpenAPI documentation and error handling to reflect new data model and authentication patterns.

• Integrate Firebase Authentication and implement
  -token validation and claim extraction.
• Transition from client-credential-based authentication (e.g. Keycloak) to federated identity model.
• Implement account-ownership authorization to enforce access control across account vehicle and profile scopes.

• Rework service logic to support:
• Vehicle enrollment and profile creation flows
• Signing key management and rotation
• Payment/card binding at profile level
• Update transaction processing logic to distinguish between:
• Profile-based signed transactions
• Vehicle-level fallback scenarios
• Implement account-level operations such as:
• Full account closure with cascading vehicle unenrollment and partial failure handling
• Work with third-party integrations including:
• Firebase (identity provider)
• Master Card SRC (card tokenization and identity binding)
• Payment middleware and BOS systems
• Ensure consistency of entity mapping across internal services and external callbacks.

• Develop and execute integration and regression test plans across:
• Updated schema and foreign key relationships
• API endpoints and authentication flows
• Update test teardown and data lifecycle logic to reflect new entity relationships.
• Strong experience in backend development (Java/Spring Boot or similar frameworks)
• Proven expertise in:
• REST API design and refactoring
• Relational database design schema migrations and indexing
• Authentication/authorization frameworks (JWT OAuth federated identity)
• Experience implementing middleware components such as interceptors filters and request contexts
• Familiarity with cloud-based identity providers (e.g. Firebase Auth OAuth providers)
• Experience with payment systems and tokenization (e.g. Master Card SRC or similar)
• Prior work on multi-tenant or hierarchical data models (account-asset-profile)
• Knowledge of event-driven integrations and callback-based third-party systems
• Experience with API gateways and distributed security validation patterns
• Strong system design and data modeling skills
• Ability to manage complex refactoring across multiple layers (DB API service)
• Attention to data integrity security and backward compatibility
• Effective collaboration across architecture QA and integration teams
• End-to-end ownership of a major platform refactor spanning:
• Data model redesign
• Authentication transformation
• API and service re-architecture
• Direct impact on enabling scalable…