Senior Backend Developer – Identity & Vehicle Platform Engineering-Remote

About the role

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.

This is a critical role in aligning platform architecture with federated identity standards and payment constraints, with direct impact on enabling scalable multi-vehicle, multi-profile user experiences.

Responsibilities

• Data Model & Persistence Layer
  • Design and implement new domain entities including user_account and vehicle_profile to support federated identity mapping.
  • Refactor existing schemas (e.g., vehicle_enrollment) 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.
• API & Middleware Development
  • 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.
• Authentication & Security Integration
  • Integrate Firebase Authentication and implement ID-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.
• Service Layer & Business Logic
  • 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)
    • MasterCard SRC (card tokenization and identity binding)
    • Payment middleware and BOS systems
  • Ensure consistency of entity mapping across internal services and external callbacks.
• Testing & Quality Engineering
  • 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.

Requirements

• 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., MasterCard 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

About Cognizant’s IoT Practice

Intelligent, IoT-enabled products will soon result in the proliferation of data and disrupt virtually all industries. To be successful, both large and small companies must leverage IoT capabilities by designing modern products that fundamentally connect people with processes. Within Cognizant IoT, we engineer industry-aligned, IoT-enabled products that merge industry needs with human drivers. Our intelligent products will revolutionize experiences and result in exciting, transformative outcomes. Without human-centered thinking, connected products are just standalone things—but with it, our modern connected products facilitate a unified way of life enjoyed by all.

Visa sponsorship is not available now or in the future. Candidates requiring sponsorship will not be considered.

Pay

$125,000 – $131,000 per year + cost of living allowance + bonus.

Benefits

• Medical/Dental/Vision/Life Insurance
• Paid holidays plus Paid Time Off
• 401(k) plan and contributions
• Long-term/Short-term Disability
• Paid Parental Leave
• Employee Stock Purchase Plan