Senior Java Backend Developer

Salary: $123,000 - 163,000 per year Requirements: 6+ years of experience building backend services with Java 21, including at least 2 years working with microservices and event-driven systems. Strong command of Java 21, object-oriented programming, and concurrency, with production experience using Spring Boot and Spring Cloud. Demonstrated production experience with AWS services such as DynamoDB, Kinesis, SQS, SNS, KMS, API Gateway, ECS/EKS, Lambda, IAM, and RDS. Experience using AI-assisted development tools such as Claude Code or Copilot, with the judgment to review AI-generated code. Strong testing practices using JUnit, Mockito, and integration testing. Must be based in the Miami or Fort Lauderdale area and available for a contract engagement described as 100% on-site. Nice to have: Financial services or payments experience, including payment messaging standards such as ISO 20022 or the legacy FAIM (Fedwire) format. Nice to have: Experience with Docker and Kubernetes. Nice to have: Infrastructure-as-code experience with Terraform, CloudFormation, or CDK. Nice to have: Familiarity with workflow and orchestration engines such as Temporal, Camunda, or AWS Step Functions. Nice to have: Advanced AI skills, including vector stores, RAG, prompt engineering, and AI observability. Responsibilities: Design, build, test, and deploy Spring Boot microservices in line with team standards, taking ownership of code from design through production. Implement asynchronous publish/subscribe messaging and manage distributed transactions using saga or orchestration patterns. Design and consume REST APIs, webhooks, and subscription APIs, and contribute to API contracts and versioning. Build and maintain CI/CD pipelines and infrastructure as code for services running primarily on AWS. Diagnose and resolve issues across distributed services using observability tools such as New Relic, Datadog, or OpenTelemetry for logs, traces, and metrics. Integrate LLMs into services using capabilities such as function or tool calling, structured outputs, and the Model Context Protocol; develop agentic workflows with appropriate safety and governance, including guardrails and PII/PCI handling for a regulated environment. Technologies: AI API AWS Lambda Backend Camunda CI/CD Claude Code Cloud Copilot Datadog Docker IAM JUnit Java Kubernetes OpenTelemetry RAG REST Spring Spring Boot Terraform microservices OOP More: At Coderio Software Company, we are forming a new squad to work with a client in the banking industry. The Senior Java Developer will contribute to high-impact backend systems built with Java 21, AWS, and event-driven microservices, helping deliver scalable, cloud-native solutions in a modern engineering environment. The posting lists Miami Lakes as the location and describes a hybrid schedule of three office days and two remote days; it also specifies a Miami/Fort Lauderdale location requirement and on-site availability for the contract engagement. Our recruitment process has three stages, including an in-person interview. We offer W2 or 1099 contracts and do not provide sponsorship. last updated 40 week of 2026