Demo

Senior Java Engineer

Haystack
Phoenix, AZ Full Time
POSTED ON 9/27/2026
AVAILABLE BEFORE 10/26/2026
This is an exciting opportunity to join a prominent financial institution that empowers individuals and businesses with comprehensive banking solutions and a strong commitment to innovation. You'll be part of a team dedicated to transforming legacy systems and building next-generation financial platforms.

The Role

  • Design, develop, enhance, and support secure, scalable, and high-performing APIs and microservices for Payments, Money Movement, and Information Reporting platforms.
  • Participate in the modernization and migration of APIs and integration services from on-premises environments to AWS cloud-native architectures.
  • Develop cloud-native solutions leveraging AWS services including API Gateway, Lambda, ECS, Step Functions, SQS, SNS, DynamoDB, RDS, S3, IAM, KMS, and AWS Transfer Family.
  • Build and maintain RESTful APIs and microservices using Java, Spring Boot, and AWS-native technologies while following enterprise architecture and security standards.
  • Implement and support CI/CD pipelines to enable automated build, testing, deployment, and release processes.
  • Contribute to code reviews, technical design discussions, and engineering best practices to improve software quality and maintainability.

What You'll Need

  • Bachelor's Degree and at least 4 years of experience in software application development and maintenance, or 8 years with a High School Diploma/GED.
  • 3 years of proven experience building and migrating enterprise-scale APIs utilizing AWS technologies like API Gateway, Lambda, ECS, SQS, SNS, DynamoDB, RDS, S3, IAM, and KMS.
  • Expertise in Java, Spring Boot, RESTful API development, microservices architecture, API security, and cloud-native application design.
  • Experience with Terraform, Docker, OpenShift, Kubernetes, and CI/CD pipelines.
  • Hands-on experience leading API modernization and cloud migration initiatives, including decomposition of monolithic applications into microservices.
  • Experience with Application Performance Monitoring (APM) and observability tools such as Dynatrace, AWS CloudWatch, or Splunk.

What's On Offer

  • Opportunity to develop mission-critical payment APIs and shape the future of scalable financial services.
  • Advance your expertise in cloud-native technologies and enterprise integration patterns.
  • Be part of a transformative journey, migrating services to a modern AWS architecture.
  • Contribute to high-impact projects with a focus on security, performance, and scalability.

Apply via Haystack today!

Salary.com Estimation for Senior Java Engineer in Phoenix, AZ
$121,177 to $145,135
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