Full Stack Software Developer

Systems Plus, Inc.

Washington, DC

JOB DETAILS
JOB TYPE
Full-time, Employee
SKILLS
Software Development, PYTHON, FastAPI, React.js, PostgreSQL, Docker, Amazon Web Services (AWS), TERRAFORM, GitHub, Application Programming Interface (API), Git, JavaScript, Node.js, AngularJS, Pytest, Amazon Simple Storage Service (S3), Code Reviews, Performance Tuning/Optimization, Product Engineering, Python Programming/Scripting Language, Software Administration, User Interface/Experience (UI/UX),
QUALIFICATIONS
  • Five years of relevant experience.
  • Bachelor’s degree in Computer Science, Engineering, Information Systems, Information Technology, or a related field; OR equivalent experience.
  • Demonstrated proficiency in: Python, FastAPI, ReactJS, PostgreSQL, and Docker.
  • Possess sufficient familiarity with AWS cloud services to deploy, monitor, and troubleshoot applications in cloud-hosted environments.
  • Knowledge of CI/CD pipeline concepts and IaC tooling (e.g., Terraform, GitHub Actions) is desired; expected to write code that integrates cleanly into existing automated pipelines.
  • Required: Public Trust Tier 2 clearance level and background check.
RESPONSIBILITIES

Application Development and Feature Delivery

  • Design, develop, test, and deploy new features and enhancements across front-end (ReactJS) and back-end (Python/FastAPI) layers of Agency applications.
  • Build and maintain RESTful APIs using FastAPI, ensuring proper validation, error handling, versioning, and documentation (e.g., OpenAPI/Swagger).
  • Develop responsive, accessible front-end interfaces using ReactJS, adhering to Agency UX standards and Section 508 accessibility requirements.
  • Implement and manage data models, queries, migrations, and stored procedures within PostgreSQL databases, with attention to performance and data integrity.

Trunk-Based Development and Collaboration

  • Operate within Agency trunk-based development workflow, committing small, incremental changes frequently to the main branch to reduce integration risk and maintain codebase.
  • Participate in code reviews, providing/receiving feedback to maintain code quality/consistency.
  • Collaborate with Agency engineers, product owners, and analysts to understand requirements, refine user stories, and deliver working software iteratively.
  • Adhere to Agency's branching, commit, and merge standards, including the use of short-lived feature branches and feature flags where applicable.

Containerization and Cloud Deployment

  • Package applications/services using Docker, maintaining clean/reproducible container images.
  • Support deployment of containerized workloads to AWS environments (e.g., ECS, EKS, or equivalent managed services), working within existing cloud infrastructure patterns.
  • Demonstrate working knowledge of AWS services relevant to application hosting and operation, including but not limited to EC2, S3, RDS, CloudWatch, IAM, and VPC networking concepts.
  • Collaborate with Agency infrastructure staff on environment configuration, secrets
    management, and cloud resource usage.

Maintenance, Bug Fixes, and Technical Debt Reduction

  • Investigate, diagnose, and resolve application defects, performance issues, and security vulnerabilities across all layers of the stack.
  • Proactively identify and address technical debt, refactoring code to improve maintainability, readability, and test coverage.
  • Monitor application behavior and logs (e.g., via AWS CloudWatch or equivalent) and respond to operational issues as needed.

Testing and Quality Assurance

  • Write and maintain automated unit, integration, and regression tests for both back-end (pytest or equivalent) and front-end (Jest, React Testing Library, or equivalent) code.
  • Ensure new features and bug fixes have appropriate test coverage prior to merge.
    Participate in functional and user acceptance testing in coordination with Agency stakeholders.

Documentation

  • Maintain technical documentation for all developed systems, including API documentation, data model diagrams, architecture decision records, and developer setup guides.
  • Document operational procedures, environment configurations, and known issues in Agency's designated knowledge management platform.
LOCATION
Washington, DC
POSTED
Today

This role is a full-stack developer position building and maintaining Agency applications end to end, ReactJS front-end and Python/FastAPI back-end, with PostgreSQL for data. It follows a trunk-based development workflow with frequent small commits, code reviews, and close collaboration with product owners and engineers. Work includes containerizing services with Docker and deploying to AWS (ECS/EKS, plus supporting services like RDS, S3, and CloudWatch), alongside ongoing bug fixes, performance tuning, and technical debt reduction. Testing (pytest, Jest/React Testing Library) and documentation (API docs, architecture decisions, runbooks) are built into the delivery process rather than treated as afterthoughts.

About the Company

S

Systems Plus, Inc.

Meet Systems Plus

Systems Plus, as a company, is a testament to its people’s hard work, dedication, and commitment to success. That commitment to success is seen by conducting business based on our Core Principles:  
 
AGILITY: With over 25 years of experience in the commercial, Federal, and Defense market, Systems Plus has proven its ability to adjust, withstand, and prosper in all economic climates. We embrace change by driving digital transformation and flexible processes for rapid-decision making.  
  
CURIOSITY: Systems Plus utilizes exploration and innovation to excel at creative problem solving, maximize creative thinking, and increase collaboration.  
 
TRUST: Systems Plus has become one of the most reputable businesses supporting the Federal market-space, consistently earning excellent performance references from its customers. We gain the trust of our clients by encompassing a deep understanding of their mission, unwavering commitment to excellence and quality, and practicing good judgement and expertise.  
  
PEOPLE: Systems Plus employs and retains highly qualified professionals because of its unique culture that is as much family oriented as it is encouraging each team member to develop their professional interests to maximize competencies, motivation, productivity, and quality solutions.  
  
VISION: Utilizing a wide variety of Contracting Vehicles and engagement strategies, and offering a diverse portfolio of services, Systems Plus is able to support their customers on a global scale and deliver results that meet their missions.

Our Philosophy

At Systems Plus, we’ve built more than a business — we’ve built a culture where people are inspired to do their best work. It’s a place where careers thrive, talent is recognized and big ideas are brought to life. Our success is powered by the innovation, passion and dedication of our people, and that’s what makes us different. If you’re ready to grow, be supported and take your career to the next level.

INDUSTRY
Government and Military