Software Engineer - Contractor

HealthMark Group is a leading provider of healthcare release of information solutions, dedicated to simplifying and streamlining the exchange of medical data between healthcare providers, payers, and patients. We empower healthcare organizations to securely and efficiently manage the exchange of health information and manage the exchange of health information securely and efficiently, ensuring compliance with regulatory requirements while maintaining the highest standards of privacy and security. 

POSITION: Senior Software Engineer 

We are seeking a Senior Backend Software Engineer to join our team as a contractor (PJ – Pessoa Jurídica) based in Brazil. This role focuses on building HIPAA-compliant healthcare microservices within a growing ecosystem. 

PRIMARY ROLE AND RESPONSIBILITIES 

• Design, develop, and maintain backend microservices across the healthcare platform ecosystem using Java/Kotlin and JVM-based frameworks (Spring Boot 3.x, Quarkus, Ktor) 
• Architect multi-tenant data models and implement data isolation patterns across relational databases 
• Design and optimize database schemas, write migrations (Flyway, ORM-native), and tune query performance 
• Develop asynchronous messaging workflows using ActiveMQ for inter-service communication 
• Containerize services with Docker and maintain CI/CD pipelines via GitHub Actions 
• Work with AWS infrastructure including EC2, SSM Parameter Store, S3, and Bedrock for AI/LLM integrations 
• Maintain and modernize legacy codebases (e.g., Spring Boot 2.x / Java 8) alongside modern stacks 

REQUIRED EXPERIENCE AND QUALIFICATIONS 

• 5+ years of backend development on the JVM platform (Kotlin strongly preferred; Java acceptable) 
• English: Professional proficiency (Spoken & Written) 
• Multi-framework proficiency: production experience with at least two of Ktor, Spring Boot, or Quarkus 
• Relational database expertise: PostgreSQL and/or MariaDB/MySQL, including schema design, migrations, and query optimization 
• ORM proficiency with Hibernate/JPA, Ebean, or Panache 
• REST API design and implementation following industry best practices 
• Docker containerization and CI/CD pipeline management with GitHub Actions 
• AWS fundamentals: hands-on experience with EC2, SSM Parameter Store, and S3 
• Message broker experience with ActiveMQ, RabbitMQ, or similar technologies 
• Git-based workflow with strong code review discipline 

Architecture & Design 

• Demonstrated experience with microservices architecture, including service decomposition, boundaries, and distributed system patterns 
• Multi-tenant application design and data isolation strategies 
• Complex state machine and Workflow Orchestration Design 
• Experience maintaining database migration systems across long-lived, evolving projects 

Professional Competencies 

• Ability to work independently on features end-to-end across multiple services 
• Comfort context-switching between different frameworks and codebases throughout the workday 
• Security-conscious mindset appropriate for a HIPAA-regulated environment handling protected health information (PHI) 
• Willingness to learn healthcare-specific regulations and compliance requirements 

ADDITIONAL PREFERRED EXPERIENCE 

• Healthcare domain knowledge: HIPAA compliance, PHI handling, and audit trail design 
• Healthcare interoperability standards: HL7 v2.x, FHIR R5, DICOM, and DICOM-Web 
• SOC 2 compliance knowledge: experience with SOC 2 audit processes, controls implementation, and continuous compliance monitoring. 
• AI/LLM integration: experience with AWS Bedrock or comparable platforms 
• Integration frameworks: Apache Camel or similar message routing solutions

Hourly Rate: 39.00 USD | NTE: 160 hours / month