Mid-Level Software Engineer – Python, AWS, and Modeling

Summary

Core4ce is hiring a backend-focused Software Engineer to support a modeling and decision-support application for the Defense Health Agency. The role focuses on designing Python services, APIs, data and simulation pipelines, cloud-native workflows, and backend functionality across the software development lifecycle.

Responsibilities

• Own software features from initial design through implementation, testing, deployment, and ongoing improvement
• Design and build Python services, APIs, data-processing workflows, and simulation capabilities
• Develop modeling logic in collaboration with subject-matter experts and integrate that logic into a production application
• Build and maintain cloud-native workflows using AWS services such as Lambda, Step Functions, SQS, and S3
• Work with different compute and deployment models based on performance, scalability, and security needs
• Design and maintain data pipelines that ingest, validate, transform, enrich, and publish source data
• Develop APIs and backend application functionality using Python and FastAPI
• Work with PostgreSQL, SQLAlchemy, and Alembic to design schemas and manage database changes
• Contribute to a Next.js frontend when needed, while primarily focusing on backend and platform development
• Build and maintain automated delivery workflows using GitLab CI/CD and GitHub Actions
• Package and deploy applications using Docker
• Apply DevSecOps practices such as automated testing, code review, dependency management, security scanning, observability, and infrastructure as code
• Participate in architectural and technical design decisions
• Demonstrate completed capabilities to users and incorporate their feedback into future development
• Diagnose challenging technical problems across application code, data, infrastructure, and deployment environments
• This position is designed to be flexible, with responsibilities evolving to meet business needs and enable individual growth

Skills

• Approximately 3–5 years of professional software engineering experience, or equivalent demonstrated ability
• Ability to obtain and maintain a Secret clearance
• Strong professional experience developing production software in Python
• Experience designing backend services, APIs, data-processing systems, or other complex software
• Working knowledge of relational databases and SQL
• Experience with automated testing, source control, code review, and modern software engineering practices
• Ability to independently own features while collaborating effectively with engineers, users, and subject-matter experts
• Ability to communicate technical decisions and demonstrate working software to users
• Experience with AWS, particularly Lambda, Step Functions, SQS, S3, or comparable cloud services
• Experience building cloud-based data pipelines
• Experience with FastAPI or a similar Python web framework
• Experience with PostgreSQL, SQLAlchemy, and Alembic
• Experience designing distributed, asynchronous, or event-driven systems
• Experience with Docker and containerized application development
• Experience creating CI/CD pipelines with GitLab CI/CD or GitHub Actions
• Familiarity with infrastructure as code, application observability, and automated security scanning
• Experience with TypeScript, React, or Next.js
• Experience working directly with users to refine requirements and demonstrate software
• Experience translating domain-expert knowledge into maintainable software logic
• Experience with discrete-event simulation, SimPy, mathematical modeling, operations research, or other analytical modeling techniques
• Familiarity with Kubernetes or another container-orchestration platform

Qualifications

Must Haves

• Approximately 3–5 years of professional software engineering experience, or equivalent demonstrated ability
• Ability to obtain and maintain a Secret clearance
• Strong professional experience developing production software in Python
• Experience designing backend services, APIs, data-processing systems, or other complex software
• Working knowledge of relational databases and SQL
• Experience with automated testing, source control, code review, and modern software engineering practices
• Ability to independently own features while collaborating effectively with engineers, users, and subject-matter experts
• Ability to communicate technical decisions and demonstrate working software to users

Nice to Haves

• Experience with AWS, particularly Lambda, Step Functions, SQS, S3, or comparable cloud services
• Experience building cloud-based data pipelines
• Experience with FastAPI or a similar Python web framework
• Experience with PostgreSQL, SQLAlchemy, and Alembic
• Experience designing distributed, asynchronous, or event-driven systems
• Experience with Docker and containerized application development
• Experience creating CI/CD pipelines with GitLab CI/CD or GitHub Actions
• Familiarity with infrastructure as code, application observability, and automated security scanning
• Experience with TypeScript, React, or Next.js
• Experience working directly with users to refine requirements and demonstrate software
• Experience translating domain-expert knowledge into maintainable software logic
• Experience with discrete-event simulation, SimPy, mathematical modeling, operations research, or other analytical modeling techniques
• Familiarity with Kubernetes or another container-orchestration platform

Benefits

• Comprehensive medical, dental, and vision coverage—employee portion paid 100% by Core4ce
• Unlimited access to training and certifications, with no pre-set cap on eligible professional development
• Tuition assistance for job-related degrees and courses
• Paid parental leave
• PTO that grows with tenure
• Generous holiday schedules
• At Core4ce, The Forge gives every employee the chance to propose bold innovations and help bring them to life with internal backing