Senior Software Engineer- Sr Java Full Stack Developer

Job Title: Senior Software Engineer- Sr Java Full Stack Developer

Work Location: O'Fallon, MO

Work Mode: Hybrid

Work Auth: All Visas accepted (No H1 and No Fake Profiles)

Experience: 8 12+ Years



Education: Bachelor's Degree or equivalent professional experience

Important: Only candidates who are currently located in or near O'Fallon, Missouri and are comfortable working in a hybrid environment will be considered.

Job Summary

We are seeking an experienced Senior Java Full Stack Developer to support the development of a highly scalable, cloud-native payment orchestration platform. The platform will enable cardholders to seamlessly access digital services directly through their banking applications using a streamlined integration architecture.

The ideal candidate will have strong experience in full-stack development, microservices, AWS cloud technologies, Kubernetes, API integration, infrastructure automation, and modern cloud-native engineering practices.

Required Technical Skills

• 8 12+ years of software engineering/full-stack development experience.

• Strong backend development experience with Java and/or Golang.

• Experience developing scalable, domain-driven microservices and REST APIs.

• Experience with Python FastAPI is highly desirable.

• Strong frontend development experience using Angular and/or React.

• Experience integrating backend APIs with mobile applications or mobile SDKs.

• Strong hands-on experience with AWS cloud services.

• Experience deploying and operating applications using AWS ECS and Fargate.

• Experience with Kubernetes and cloud-native application architectures.

• Experience with AWS Graviton/ARM64 environments is preferred.

• Hands-on experience with Infrastructure as Code using Terraform and/or AWS CloudFormation.

• Strong understanding of API orchestration, distributed systems, microservices architecture, scalability, and reliability.

• Experience troubleshooting applications across frontend/mobile, backend APIs, cloud infrastructure, and runtime environments.

AI / Cloud-Native Experience

• Experience integrating AI-powered or AI-native capabilities into enterprise applications is preferred.

• Exposure to Amazon Bedrock is highly desirable.

• Experience with Amazon Bedrock AgentCore Runtime is an added advantage.

• Ability to troubleshoot integrations across mobile, backend, AWS infrastructure, and AI runtime layers.

Preferred Skills

• Java

• Golang

• Python / FastAPI

• Angular / React

• AWS

• ECS / Fargate

• Kubernetes

• Terraform

• CloudFormation

• REST APIs

• Microservices

• Domain-Driven Design

• Amazon Bedrock

• AgentCore Runtime

• AWS Graviton / ARM64

• Payment or financial services platforms