Java Backend Developer with AWS

Quantum Technologies. LLC; Chicago (IL); Hybrid; USD 90,000 - 120,000; Full time

Job summary

Quantum Technologies. LLC is seeking a Java Backend Developer with AWS to join our Chicago team on a hybrid arrangement.

You will design and implement scalable microservices, RESTful APIs, and data integrations using Java 17+, Spring Boot, Python, and AWS services. You will focus on resiliency across multi-AZ deployments, production incident RCA, observability with CloudWatch, and building CI/CD pipelines with GitHub Actions, Jenkins, and CloudFormation.

Qualifications

• 7+ years of backend software engineering in distributed, high-availability systems.
• Strong Java (17+) and Spring Boot expertise, with Python experience.
• Extensive AWS experience across core services: ECS/Fargate, S3, Lambda, EventBridge, SQS, CloudWatch.
• Relational DB design and tuning with PostgreSQL/Aurora PostgreSQL.
• CI/CD and IaC familiarity with Jenkins, GitHub Actions, CodePipeline, and CloudFormation.

Responsibilities

• Design, build, and maintain scalable microservices and REST APIs.
• Architect resiliency with multi-AZ/region deployments and DR testing.
• Analyze production incidents, perform RCA, and enhance observability using CloudWatch.
• Develop and optimize CI/CD pipelines and IaC workflows.
• Mentor junior developers and promote automated testing standards.

Skills

Java (Java 17+)

Spring Boot

Python

RESTful APIs

Distributed systems

Testing (JUnit/Mockito)

Education

Bachelor's degree in Computer Science or related

Tools

AWS (EC2/S3/Lambda)

PostgreSQL/Aurora

Jenkins

GitHub Actions

CloudFormation

CodePipeline

ECS/Fargate

Job description

US Citizen, Green Card, H-1B, OPT-EAD, CPT, Other

Job Title: Java Backend Developer with AWS

Location: Chicago, IL (hybrid)

Duration: 12 Months + Extension

Bill Rate: $76/hour (C2C)

Job Type: W-2, 1099, C2C

Client: To Be Discussed Later

Work Authorization:US Citizen, Green Card, OPT-EAD, CPT, H-1B, H4-EAD, Other

Key Responsibilities

• Cloud-Native & Integration Architecture: Design, build, deploy, and maintain scalable microservices, RESTful APIs, and event-driven architectures utilizing Java 17+, Spring Boot, Python, and AWS integration services.
• Resiliency & Disaster Recovery: Architect fault-tolerant, high-availability solutions across multiple AWS Availability Zones and Regions, conducting failover testing and actively reducing Mean Time to Resolution (MTTR).
• Production Operations & Root Cause Analysis: Investigate complex production incidents, perform root cause analysis (RCA), and implement robust observability frameworks using Amazon CloudWatch.
• DevOps & Pipeline Automation: Build, maintain, and optimize continuous integration and delivery (CI/CD) pipelines leveraging GitHub Actions, Jenkins, AWS CodePipeline, and CloudFormation infrastructure-as-code (IaC).
• Data Modeling & Optimization: Implement relational data models, craft complex queries, and tune database performance on Amazon Aurora PostgreSQL.
• Mentorship & Quality Standards: Drive peer code reviews, champion automated testing standards (JUnit, Mockito), and provide technical mentorship to junior developers.

Required Qualifications

• Experience: 7+ years of professional backend software engineering experience building and supporting distributed, high-availability production systems.
• Core Languages: Advanced, hands-on proficiency in Java (Java 17+), Spring Boot, and Python.
• AWS Cloud Engineering: Extensive hands-on experience across core AWS integration and compute services, including ECS/Fargate, EventBridge, SQS, SNS, Lambda, S3, and CloudWatch.
• Database & Performance: Strong relational database background with PostgreSQL / Amazon Aurora PostgreSQL, including schema design, query optimization, and tuning.
• CI/CD & IaC: Practical experience managing automated deployments using Jenkins, GitHub Actions, AWS CodePipeline, and CloudFormation.
• Testing: Demonstrated proficiency with automated unit and integration testing frameworks (JUnit, Mockito).
• Education: Bachelor's degree in Computer Science, Engineering, or a related technical discipline (or equivalent practical experience).

Preferred Qualifications

• AWS Certification: Active AWS Certified Solutions Architect, Developer Associate, or Cloud Practitioner certification (highly preferred).
• Domain & Integration Experience: Hands-on experience with Electronic Data Interchange (EDI), B2B messaging integrations, or high-volume transportation/railroad/logistics systems.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.