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Senior Full Stack Engineer

eSimplicity

$116,700 - $145,000
Dec 30, 2025
Columbia, MD, US
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eSimplicity is looking to improve the lives and protect the well-being of all Americans by creating intuitive products and services that equip federal agencies with solutions to transform today for a better tomorrow.

Requirements

  • Proficiency in at least one of the following languages: TypeScript, JavaScript, Python.
  • Strong experience with modern frameworks such as React.js, Next.js, Node.js, Flask.
  • Proven experience working on large-scale system architectures and Petabyte-level data systems.
  • Proficient in automated testing frameworks (PyTest, Jest, Cypress, Playwright) and testing best practices.
  • Experience developing, testing, and securing RESTful and GraphQL APIs.
  • Deep knowledge of working with relational and NoSQL databases (PostgreSQL, MySQL, MongoDB).
  • Proven track record with AWS cloud architecture, including networking, security, and service orchestration.

Responsibilities

  • Design, develop, and maintain modern full-stack web applications that enable data flow and visibility across platforms.
  • Prototype and operationalize tools that assist in large-scale data movement and ETL automation.
  • Build APIs and backend services to authenticate, authorize, and connect with data mesh nodes.
  • Integrate with enterprise and third-party data sources via secure and scalable interfaces.
  • Contribute to the design and implementation of secure access patterns across distributed data systems.
  • Author technical documentation, including API specifications, deployment guides, and internal usage manuals.
  • Participate in performance tuning and monitoring of deployed services, ensuring systems are observable and scalable.

Other

  • All candidates must pass public trust clearance through the U.S. Federal Government.
  • Minimum 7 years of relevant experience in software engineering.
  • Bachelor's degree in Computer Science, Software Engineering, Data Science, Statistics, or related technical field.
  • Strong written and verbal communication skills, including the ability to explain technical concepts to non-technical stakeholders.
  • Occasional travel for training and project meetings, estimated to be less than 25% per year.