Mid Java Developer

5+ years of Java development with Spring, microservices architecture, GraphQL implementation, AWS deployment (ECS, Lambda, API Gateway), RESTful services, strong problem-solving skills, and experience building reusable libraries.

Client: 7-Eleven

Position: Mid Java Developer – ID 12099

Type: Contract 6 month+

Location: Irving, TX (5 days onsite)

Openings: 2

About This Oppertunity

As a Mid Java Developer with deep expertise in Java Spring and GraphQL to help us build a Backend For Frontend (BFF) service. This BFF will unify multiple microservices behind a single, streamlined interface, reducing complexity for our web and mobile front-end clients. The ideal candidate is a senior engineer with a strong track record in microservices, Java Spring, and real-world GraphQL implementation.

KEY RESPONSIBILITIES

Design and develop the BFF layer in Java Spring, with a focus on GraphQL technology.

Orchestrate data retrieval from multiple microservices into client-specific payloads

Implement resolvers and data fetchers that efficiently map from various back-end services

Optimize data access and response times by leveraging caching or persisted queries.

Ensure the BFF is resilient and scalable under high load, including parallel calls and fallback strategies.

Design and build common libraries for logging, error handling, configuration, and data mapping

Provide clear documentation on the architecture, schema, and integration points for future maintainers.

Conduct knowledge transfer sessions to internal teams at the end of the contract.

REQUIRED SKILLS & EXPERIENCE

5+ years of professional Java development experience, focusing on enterprise-grade applications.

5+ years of experience in microservices & Spring-related technologies

3+ years of hands-on experience deploying services on AWS (e.g., ECS, Lambda, API Gateway)

Expertise in building RESTful or GraphQL services with Spring Framework.

Proven experience implementing GraphQL solutions in production environments

Strong understanding of microservice architecture, including inter-service communication, error handling, and data transformation

Demonstrated track record of building or contributing to shared libraries that unify cross-cutting concerns

Strong knowledge of code design patterns and best practices for reusability.

Experience calling downstream services from a Java-based service.

Self-driven and able to operate autonomously, delivering solutions within tight timelines

Clear communication skills, with the ability to document work and provide effective handover.

Ability to understand business requirements and translate into technical requirements.

Demonstrated problem-solving skills, with a focus on performance optimization and reliability.

Preferred Qualifications

• Bachelor's degree in Computer Science or equivalent.

• Familiarity with code versioning tools - Git (Gitlab).

• Exposure to retail industry, experience with e-commerce applications.