API Developer: Java 21 | Cloud-Native Microservices

Ascendion; New York (NY); On-site; USD 110,000 - 120,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401(k) retirement plan

Long-term disability insurance

Short-term disability insurance

5 personal days annually

10-15 days of paid vacation

6 paid holidays + 1 floating holiday

Ascendion Learning Management System

Job summary

Ascendion seeks an API Developer to design, build, and maintain scalable REST APIs and backend services using Java 21 and Spring Boot. You will craft cloud-native microservices with Spring Cloud and deploy in AWS ECS/EKS, leveraging Terraform IaC.

You will collaborate with cross-functional teams to deliver secure, high-performing software, contribute to CI/CD pipelines with Jenkins and Spinnaker, and drive observability with Splunk and Dynatrace.

Qualifications

• 3-6 years of professional software engineering experience.
• Strong programming experience with Java 21 (or modern Java versions).
• Hands-on experience with Spring Boot and REST API development.
• Experience building microservices architectures and distributed systems.
• Strong understanding of Spring Cloud components and cloud-native application design.
• Experience working with Cassandra and/or MongoDB.
• Hands-on experience with AWS cloud services.
• Experience deploying containerized applications using ECS and/or EKS.
• Strong knowledge of Infrastructure as Code using Terraform.
• Experience building and maintaining CI/CD pipelines using Jenkins and Spinnaker.
• Experience with application monitoring, logging, and observability tools such as Splunk and Dynatrace.

Responsibilities

• Design, develop, and maintain scalable REST APIs and backend services using Java 21 and Spring Boot.
• Build cloud-native microservices leveraging Spring Cloud and modern distributed system patterns.
• Develop integrations between enterprise applications, databases, and external services.
• Work with NoSQL databases including Cassandra and MongoDB to design efficient data models and queries.
• Deploy and manage applications in AWS containerized environments using ECS and EKS.
• Create and maintain Infrastructure as Code (IaC) using Terraform.
• Implement CI/CD pipelines and deployment automation using Jenkins and Spinnaker.
• Monitor application performance, troubleshoot production issues, and improve system reliability using Splunk and Dynatrace.
• Collaborate with cross-functional teams to deliver secure, high-performing, and resilient software solutions.
• Participate in code reviews, architecture discussions, and engineering best practices initiatives.
• Stay current with emerging technologies including Spring AI, Agentic AI concepts, and MCP.

Skills

Java 21

Spring Boot

REST API design

Microservices

AWS

Terraform IaC

CI/CD (Jenkins, Spinnaker)

Observability (Splunk, Dynatrace)

NoSQL (Cassandra, MongoDB)

Distributed systems

Tools

Jenkins

Spinnaker

ECS

EKS

Terraform

Spring Cloud

Job description

Ascendion seeks an API Developer to design, build, and maintain scalable REST APIs and backend services using Java 21 and Spring Boot. You will craft cloud-native microservices with Spring Cloud and deploy in AWS ECS/EKS, leveraging Terraform IaC.

You will collaborate with cross-functional teams to deliver secure, high-performing software, contribute to CI/CD pipelines with Jenkins and Spinnaker, and drive observability with Splunk and Dynatrace.