Sr Java Backend Developer

Coderio; Miami (FL); On-site; USD 140,000 - 190,000; Full time

Job summary

Coderio is forming a dedicated backend squad in Miami Lakes to work with a banking client on high-impact systems using Java 21, AWS, and event-driven microservices. You will help build scalable, cloud-native solutions in a modern engineering environment.

Senior backend engineer role requires 6+ years in Java with 2+ years in microservices and event-driven design, deep AWS exposure, and AI-assisted development capabilities. On-site in the Miami area for a contract engagement.

Qualifications

• 6+ years of backend experience in Java.
• 2+ years in microservices and event-driven systems.
• Spring Boot and Spring Cloud expertise.
• Production AWS experience with listed services.
• Experience with AI-assisted development tools.
• Solid testing with JUnit and Mockito.
• On-site in the Miami area for a contract engagement.

Responsibilities

• Design, build, test, and deploy Spring Boot microservices.
• Implement publish/subscribe messaging and saga/orchestration patterns.
• Design REST APIs, webhooks, and subscription APIs.
• Build and maintain CI/CD pipelines and infrastructure-as-code on AWS.
• Diagnose and resolve issues across distributed services with observability tools.
• Integrate AI agentic workflows with guardrails and governance.

Skills

Java 21

Spring Boot

Spring Cloud

AWS

Microservices

Event-driven

CI/CD

JUnit

Mockito

Tools

DynamoDB

Kinesis

SQS

SNS

KMS

API Gateway

ECS/EKS

Lambda

IAM

RDS

Job description

At Coderio Software Company we are creating a new squad to work with one of our clients in the banking industry.

You'll be working on high-impact backend systems using Java 21, AWS, and event-driven microservices, helping to build scalable, cloud-native solutions in a modern engineering environment.

Location: Miami Lakes

Three-stage recruitment process, with a F2F interview.

Responsibilities:

• Backend Architecture & Execution: Design, build, test, and deploy Spring Boot microservices following strict team standards. You will own your code from design to production.
• Distributed Systems & Event-Driven Flows: Implement publish/subscribe async messaging and handle distributed transactions using saga or orchestration patterns.
• API Design & Integration: Design and consume REST APIs, webhooks, and subscription APIs, while actively contributing to API contracts and versioning.
• Cloud-Native Engineering: Build and maintain CI/CD pipelines and infrastructure-as-code for your services, operating heavily on AWS.
• Operational Excellence: Diagnose and resolve issues across distributed services utilizing observability tools like New Relic, Datadog, or OpenTelemetry for logging, tracing, and metrics.
• Advanced AI & Agentic Workflows: 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.

Requirements:

• Technical Foundation: Senior level with 6+ years of experience building backend services in Java 21 and at least 2+ years specifically in microservices and event-driven systems.
• Stack Expertise: Deep, hands-on mastery of Java 21 with strong OOP and concurrency fundamentals, alongside production experience in Spring Boot and Spring Cloud.
• Cloud Architecture: Solid, demonstrable production experience with AWS services including DynamoDB, Kinesis, SQS, SNS, KMS, API Gateway, ECS/EKS, Lambda, IAM, and RDS.
• AI Proficiency: Fluency with AI-assisted development (like Claude Code or Copilot) with the critical judgment to review AI-generated code.
• Testing Discipline: Solid testing discipline utilizing JUnit, Mockito, and integration testing.
• Location & Engagement: Must be located in the Miami / Fort Lauderdale area and available to work 100% on-site for a contract engagement.

Nice to Have:

• Financial services or payments domain experience, specifically with payment messaging standards such as 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.

Offer valid for W2 or 1099 contracts. Coderio does not offer sponsorships.