Full Stack Developer

Oasys•Washington, DC

9d•$65,000 - $90,000•Onsite

About The Position

Oasys International LLC is seeking an experienced Full Stack Developer to guide a development team in learning new tools and techniques, identify and implement system improvements, and mentor teammates. The developer will design, build, and modernize secure, scalable, mission-critical applications hosted on AWS, with work spanning application architecture, cloud infrastructure, and DevOps automation. The team uses Agile methodology with two-week sprints tracked in Jira, documentation in Confluence, and GitHub for source control and CI/CD automation. Infrastructure is managed as code, with an emphasis on cloud and open-source technologies. The role works in a stack-agnostic environment and may involve monolithic, modern, or transitional application architectures. Current technologies include Python, Django, Rails, React, TypeScript, Docker, Postgres, PostGIS, and Snowflake. The role includes evaluating platforms and architectures, researching emerging technologies, establishing development standards, reviewing code, building and maintaining software, and translating business and system requirements into scalable architectures and data models. The developer will help ensure security and information assurance, design RESTful APIs, integrate application components and external services, contribute to distributed-systems decisions, optimize performance and security, and participate in architecture reviews. The position is located in Washington, DC. Applicants must be U.S. citizens and able to obtain a Public Trust.

Requirements

Bachelor's degree in Engineering, Computer Science, or another related analytical, scientific, or technical discipline; additional experience may be substituted for a degree.
At least five years of demonstrated experience building and integrating complex full-stack applications using modern frontend frameworks, RESTful and GraphQL APIs, relational and NoSQL databases, and containerized backends.
Demonstrated knowledge and practical application of HTML, JavaScript, CSS, or other relevant web development experience.
Experience with modern JavaScript frameworks and libraries such as React, Redux, Vue, Ember, or Angular, and knowledge of when to use them.
Experience with software development activities including analysis, design, development, implementation, testing, maintenance, quality assurance, troubleshooting, debugging, and/or upgrading software systems.
Experience implementing CI/CD pipelines using GitHub Actions, GitLab CI, Jenkins, or similar tools.
Ability to understand business requirements and their implications across a project's technical landscape.
Ability to guide and negotiate functional requirements with clients and teams across frontend and backend concerns using informed technical experience.
Understanding of containerization, container orchestration, microservices, and API management.
Analytical, problem-solving, and decision-making skills, with a continuous-improvement mindset.
Self-motivated.
Ability to present analytical results verbally and in writing.
Proficiency with Microsoft Office productivity software, including Word, Excel, PowerPoint, SharePoint, Visio, and Outlook.
Excellent verbal and written communication skills, strong organization, and attention to detail; comfort interacting with government, contractor, and executive leadership.
Deep understanding of HTTP, WebSocket, load balancing, reverse proxies, and API security practices such as OAuth2, JWT, and CORS.
Proficiency in Infrastructure as Code using tools such as Terraform or AWS CloudFormation.
Familiarity with networking fundamentals, including VPCs, subnets, security groups, and service discovery.
Must be a U.S. citizen.
Must be able to obtain a Public Trust.

Nice To Haves

Expertise with Git as a version control system and team collaboration tool.
Experience debugging frontend and backend issues.
Experience with pair programming and Extreme Programming (XP).
Experience with content management systems.
Experience with PaaS products such as Salesforce, ServiceNow, and Appian.
Familiarity with object-oriented programming concepts.
Interest in contributing across the full stack, including frontend, backend, and middleware.
Computer Science fundamentals in object-oriented design, data structures, and algorithm design.
Experience with event-driven systems such as Kafka, SQS/SNS, or RabbitMQ.
Experience with serverless architectures such as AWS Lambda and Step Functions.
Experience with API documentation tools such as Swagger/OpenAPI.
Strong background in test-driven development and quality assurance across the stack.
Experience building reusable web components.
Familiarity with JavaScript build tools such as NPM/yarn, webpack, and Babel.
Experience with Node.js and Java-based web applications.
Experience with unit testing, regression testing, and user testing.
Experience with a federal agency as a contractor or federal employee.

Responsibilities

Evaluate and recommend software development platforms, architectures, and hardware requirements for development, testing, quality assurance, and production environments.
Conduct applied research into current and emerging computer technology and integrate appropriate advances into the mission.
Develop and maintain software development architecture and recommend improvements.
Establish and document software development guidelines and coding standards, and conduct training sessions as needed.
Conduct code reviews and diagnose reported technical issues.
Write, compile, debug, test, deploy, document, and implement programs for new and existing COTS, GOTS, OSS, and custom-developed systems.
Work on a team responsible for developing, implementing, and maintaining diverse applications; modify existing applications and resolve technical issues as needed.
Translate business and system requirements into scalable technical architectures and data models.
Provide input on application and server configuration to address mission-related information security and assurance principles.
Design and implement RESTful APIs and integrate frontend, backend, and external services with strong authentication and authorization models.
Contribute to decisions about service decomposition, API gateways, message queues, and distributed-systems design.
Monitor and optimize application performance, scalability, and security across environments using tools such as CloudWatch, Prometheus, Grafana, or similar.
Participate in and lead architecture reviews to evolve monoliths into microservices or hybrid models when appropriate.
Guide a development team in learning tools and techniques, identify and implement system improvements, and mentor teammates.
Perform other duties as assigned by management.