Job description

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. 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. • 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 • Direct impact on enabling scalable multi-vehicle multi-profile user experiences • Critical role in aligning platform architecture with federated identity standards and payment constraints Certifications Required not required 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. *Please note, this role is not able to offer visa transfer or sponsorship now or in the future* • Applications will be accepted until July 31st , 2026 • LI#- #LI-SC6 Compensation & Benefits $125,000 – $135,000 per year + Cost of living allowance • Bonus + Comprehensive Benefits Additional Information • • ⚠️ Visa sponsorship is not available now or in the future. Candidates requiring sponsorship will not be considered. Benefits : Cognizant offers the following benefits for this position, subject to applicable eligibility requirements: • 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 About Cognizant: Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, bridging the gap between AI investment and enterprise value by building full-stack AI solutions for our clients. Our deep industry, process and engineering expertise enables us to build an organization’s unique context into technology systems that amplify human potential, drive tangible outcomes and keep global enterprises ahead in a fast-changing world. See how at cognizant.ai or @cognizant. Additional employment information Compensation information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law. Applicants may be required to attend interviews in person or by video conference. In addition, candidates may be required to present their current state or government issued ID during each interview. Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, state or local laws. If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email CareersNA2@cognizant.com for roles based in the Americas or CareersIndia2@cognizant.com for roles based in India.

Requirements

Must-haves

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
Account-level vehicle-level and profile-level operations
Updated relationships between entities (account-vehicles-profiles)
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
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

Nice-to-haves

None flagged.

Application prep

Use the role’s language and application details while tailoring your materials.

Keywords to mirror

apirestjavaai

Platform: cognizant
Effort: medium

Benefits

Benefits detected in the listing.

Dental

Vision

401(K)

Pto

Paid Time Off

Parental Leave