Senior Application Developer

Title: Senior Application Developer

Location: Lansing, MI (Hybrid)

Duration: 12+ Months

Employment Type: W2 Only (Strictly No C2C/1099)

About the Role
We’re seeking a Senior Java Developer to design, build, and optimize scalable, secure microservices and APIs. You’ll lead end‑to‑end development—from architecture and coding to CI/CD and production readiness—while mentoring teammates and collaborating across product, QA, and DevOps.

Key Responsibilities

• Design and build backend services using Java 11+/17, Spring Boot, and RESTful APIs.
• Develop microservices with robust error handling, observability, and resilience patterns.
• Optimize performance (profiling, JVM tuning), and ensure security (OAuth2/JWT).
• Integrate with SQL/NoSQL databases (PostgreSQL/MySQL/Oracle, MongoDB) and caching (Redis).
• Implement CI/CD with Git, Jenkins/Azure DevOps, Docker, Kubernetes.
• Write unit/integration tests (JUnit, Mockito, Testcontainers) and champion code quality.
• Collaborate in Agile teams; conduct code reviews; mentor junior engineers.

Required Skills

• 12+ years in backend development; 2+ years in senior/lead capacity.
• Deep expertise in Java, Spring Boot, REST, ORM/JPA/Hibernate.
• Microservices architecture, API design, event-driven patterns.
• Databases: strong SQL, schema design, NoSQL familiarity.
• DevOps: Git, CI/CD, Docker, Kubernetes, cloud (AWS/Azure/Google Cloud Platform).
• Observability: OpenTelemetry, PrometheGrafana, ELK/Splunk.
• Messaging: Kafka/RabbitMQ; caching: Redis.

Nice-to-Have

• Reactive (Project Reactor/WebFlux), GraphQL, gRPC.
• Security best practices (OWASP), secrets management.
• Performance & load testing (JMeter, Gatling).