Sr Java Backend - Miami

Coderio • Miami, FL

4d • Onsite

About The Position

Coderio designs and delivers scalable digital solutions for global companies. We combine strong technical expertise with a product mindset to lead complex software initiatives end-to-end. We work with international clients, value autonomy and clear communication, and build long-term partnerships through technical excellence. This is a high-impact technical role. We are looking for a Senior Java Microservices Developer for a contract engagement. You will own the design, development, and delivery of a suite of event-driven microservices running on AWS. Operating strictly on-site in the Miami / Fort Lauderdale area, you will be a key player in an established engineering team, bringing deep technical expertise in distributed systems and leveraging modern AI tools and agentic workflows to build production-grade services. This is a hands-on execution role. You are responsible for the technical health of the codebase, the performance of the architecture, and delivering high-quality software that scales.

Requirements

• Senior level with 8+ years of experience building backend services in Java, and at least 2+ years specifically in microservices and event-driven systems.
• Deep, hands-on mastery of Java (17+ preferred) with strong OOP and concurrency fundamentals, alongside production experience in Spring Boot and Spring Cloud.
• Solid, demonstrable production experience with AWS services including DynamoDB, Kinesis, SQS, SNS, KMS, API Gateway, ECS/EKS, Lambda, IAM, and RDS.
• Fluency with AI-assisted development (like Claude Code or Copilot) with the critical judgment to review AI-generated code.
• Solid testing discipline utilizing JUnit, Mockito, and integration testing.
• Must be located in the Miami / Fort Lauderdale area and available to work 100% on-site for a contract engagement.

Nice To Haves

• Financial services or payments domain experience, specifically with payments messaging standards like ISO 20022 and the legacy FAIM (Fedwire) format.
• Experience with containers and orchestration (Docker, Kubernetes).
• Hands-on experience with Infrastructure as Code (Terraform, CloudFormation, or CDK).
• Experience with workflow and orchestration engines such as Temporal, Camunda, or AWS Step Functions.
• Advanced AI skills: vector stores/RAG, prompt engineering, and AI observability.

Responsibilities

• Design, build, test, and deploy Spring Boot microservices following strict team standards.
• Implement publish/subscribe async messaging and handle distributed transactions using saga or orchestration patterns.
• Design and consume REST APIs, webhooks, and subscription APIs, while actively contributing to API contracts and versioning.
• Build and maintain CI/CD pipelines and infrastructure-as-code for your services, operating heavily on AWS.
• Diagnose and resolve issues across distributed services utilizing observability tools like New Relic, Datadog, or OpenTelemetry for logging, tracing, and metrics.
• Integrate LLMs into services (function/tool calling, structured outputs, and the Model Context Protocol) and build agentic workflows, ensuring AI safety and governance (guardrails, PII/PCI handling) in a regulated setting.

Benefits

• On-site collaboration in a dynamic and fast-paced environment in the Miami / Fort Lauderdale area.
• Long-term contract engagement with high impact and autonomy.
• Strategic and high-visibility role within a modern engineering culture.
• Opportunity to influence technical strategy, especially regarding modern event-driven architectures and AI integrations.
• Collaborative international team with strong technical leadership.

What This Job Offers

• Career Level: Senior
• Education Level: No Education Listed