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Keylent

Sr. Java Lead Backend Developer with Core Java (14+ yrs), Spring Boot/Microservi

Keylent, Charlotte, North Carolina, United States, 28245

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Sr. Java Lead Backend Developer with Core Java (14 yrs), Spring Boot/Microservices, REST APIs, Spring AI/LLM integrations, SQL & vector DBs (Pinecone/MilvRedis Vector), DDD/CQRS/Event Sourcing, Reactive Streams (WebFlux), OAuth/JWT/OIDC security, Spring Cloud components, AI orchestration & cloud AI (AWS/Azure/Vertex), strong design patterns & technical leadership- Onsite – Charlotte NC – need locals and in-person interview must

Key Responsibilities

Lead backend development with Core Java (14 years experience required)

Architect and build microservices using Spring Boot, Spring Framework, Spring Data, Spring Security

Design & consume REST APIs; exposure to SOAP/WSDL/XML is a plus

Integrate AI/LLM workflows using Spring AI or similar frameworks

Work with SQL databases and vector databases (Pinecone, Milvus, Redis Vector)

Apply Domain-Driven Design (DDD), CQRS, Event Sourcing, Reactive Streams (Reactor, WebFlux)

Implement secure authentication/authorization: OAuth, JWT, OpenID Connect

Participate in high-level architecture discussions and mentor developers

Support hybrid deployments, legacy modernization, and AI-enabled microservices

Implement feature toggles, A/B testing, canary deployments

Required Skills & Experience

Deep expertise in the Java ecosystem and backend architectural patterns

Strong hands-on experience with Spring Cloud components: Config Server, Service Discovery, Circuit Breakers, API Gateway

Strong knowledge of design patterns: Repository, Service, Factory, Strategy

Experience with AI orchestration, prompt chaining, multi-agent workflows

Familiarity with cloud-native AI deployments (AWS Lambda, Azure AI, Google Vertex AI)

Ability to analyze, explain, and justify code-level decisions and architectures

Soft Skills

Excellent communication & cross-team collaboration

Strong problem-solving and leadership abilities

Ability to mentor and guide junior engineers

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