Microservices Developer (Remote)

Overview: Tier One Technologies is seeking a Microservices Developer to support our US Government client. Responsibilities: Design, build, and maintain Spring Boot microservices using Java 21 and Java 25.

Overview:

• Tier One Technologies is seeking a Microservices Developer to support our US Government client.
• This will be a 100% remote contract-to-hire position.
• SELECTED CANDIDATES WITHOUT REQUIRED CLEARANCE WILL BE SUBJECT TO A FEDERAL GOVERNMENT BACKGROUND INVESTIGATION TO RECEIVE IT.

Responsibilities:

• Design, build, and maintain Spring Boot microservices using Java 21 and Java 25.
• Create and evolve RESTful APIs with clear contracts, versioning, and backward compatibility.
• Implement input validation, error handling, idempotency, and standardized response models.
• Integrate services with on-prem and AWS-hosted databases during migration phases.
• Plan and execute data-access changes to support hybrid connectivity (on-prem to AWS) safely.
• Optimize database interactions, including query tuning, connection pooling, and transaction boundaries.
• Containerize services and maintain production-ready Docker images.
• Deploy and operate services on Kubernetes with health probes, resource limits, and autoscaling.
• Build and maintain CI/CD pipelines for build, test, security scan, and deployment automation.
• Implement secure service-to-service and client authentication/authorization.
• Manage secrets and configuration using AWS-native and Kubernetes-native approaches.
• Add observability: structured logging, metrics, distributed tracing, dashboards, and alerting.
• Troubleshoot incidents across application, container, cluster, network, and database layers.
• Improve resiliency with retries, timeouts, circuit breakers, and graceful degradation patterns.
• Participate in migration planning from on-prem infrastructure and data stores to AWS.
• Support release validation in staging and production, including rollback readiness.
• Write and maintain unit, integration, contract, and performance tests.
• Address vulnerabilities by upgrading dependencies and remediating CVEs in application libraries.
• Collaborate with QA, platform, security, and architecture teams on standards and best practices.
• Document APIs, operational runbooks, and service ownership responsibilities.

Qualifications:

• A degree from an accredited College/University in the applicable field of services is required. If the individual's degree is not in the applicable field, then 4 additional years of related experience is required.
• 8+ years of experience in IT software development.
• Strong knowledge of Spring Boot microservices.
• Hands-on experience with Java 21 and Java 25.
• Excellent communication skills.
• Must be a US Citizen or have Permanent Residence status (Green Card).
• Must be able to obtain a Position of Public Trust Clearance.
• Must be able to pass a drug screening, criminal history, and credit checks.
• Must have lived in the United States for the past 5 years.
• Cannot have more than 6 months travel outside the United States within the last five years. Military Service excluded. (Exception does not include military family members.)