Sr. Full Stack Software Engineer

Job  Number: 26-00557

Title:

Sr. Full Stack Software Engineer

Location:

Iselin, NJ, 08830

Posted Date:
Contact:
Deepak Kumar Contact Email: dipak

Contact Phone:
Company: HAN Staffing

Job Title:

Sr. Full Stack Software Engineer Location :
Jersey City, NJ ( Local)
Exp: 12+ Yrs Rate: $75/hrNo of Position: 118316-3 and 118316-4

RTTO – 5 Days Onsite Job responsibilities

Leads end-to-end delivery of full stack solutions using React, Java Spring Boot, GraphQL/REST, and AWS-managed services, from design through production support.

Drives architecture and design reviews, defining service boundaries, API contracts, data models, and integration patterns.

Develops secure, high-quality, production-grade code; conducts thorough code reviews; sets and enforces engineering standards.

Builds and maintains highly available and scalable services with strong operational excellence: reliability, performance, cost awareness, and maintainability.

Implements and governsauthentication/authorization using OIDC/OAuth2, token validation, scopes/claims, and service-to-service security patterns.

Establishes robust observabilitypractices (structured logging, metrics, tracing), incident response readiness (runbooks).Evaluates vendor and internal solutions (including architectural fit, security posture, scalability, and operability) and guides adoption decisions.

Partners with Product and UX to deliver outcomes; translates requirements into technical plans and milestones; proactively manages trade-offs.

Required qualifications, capabilities, and skills

Minimum 8 years applied full stack engineering experience delivering and operating production systems; experience as a senior/lead capacity (technical leadership, design ownership).React expertise: modern React patterns, Type Script, state management, component design systems, performance optimization, and responsive UI development.

Java Spring Boot expertise: building APIs, dependency injection, validation, error handling, and performance tuning.

GraphQL proficiency: schema design, resolvers, federation/composition patterns (where applicable), query performance (N+1 mitigation, caching), and API governance/versioning strategy.

REST proficiency:
OpenAPI-style contract design, pagination/filtering, idempotency, backward compatibility, and consumer-driven API evolution.

OIDC/OAuth2: hands-on implementation with JWTs, refresh/access token flows, scopes/claims, secure session patterns, and least-privilege access control.

AWS experience (hands-on): designing, deploying, and operating cloud-native applications; strong understanding of IAM, networking basics, and operational tooling (logs/metrics/alarms).Data layer expertise:

AWS Aurora PostgreSQL: advanced SQL, indexing, query optimization, migrations, and transactional design.

AWS Neptune: gremlin, graph modeling, query patterns, and performance considerations for graph workloads.

Event-driven systems:

AWS Kafka (MSK): topics/partitions, consumer groups, schema evolution, ordering/at-least-once semantics, idempotency, retries/DLQs, and operational monitoring.

CI/CD and quality:

Strong Git practices, automated testing (unit/integration/contract/e2e), code quality gates, and release confidence practices (feature flags, progressive rollout where applicable).AI-assisted engineering (MUST):

Demonstrated proficiency using Claude Code and/or Git Hub Copilot to accelerate development, debugging, refactoring, test generation, and documentation—while ensuring correctness, security, and maintainability (e.g., validating outputs, avoiding sensitive data leakage, and adhering to team standards).Preferred qualifications, capabilities, and skills

Infrastructure as Code (Terraform/Cloud Formation/CDK) and deployment automation patterns.

Containerization and…