18466 software engineer level jobs found

Refine Search
Refine Search
software engineer level
Back to job list
Back

Software Engineer Level 4

Base-2 Solutions
Apply Now
Reston, VA, USA
Sep 20, 2026
Position Summary Base-2 Solutions is seeking a Software Engineer Level 4 to develop, maintain, and enhance complex and diverse software systems supporting mission-focused environments. This role is centered on backend development, data engineering, and API development, with emphasis on building scalable systems using Python and FastAPI, designing and managing PostgreSQL databases, and supporting high-performance integrations across high-speed, high-volume, mission-critical, data-sensitive systems. Essential Duties and Responsibilities
  • Develop, maintain, and enhance complex and diverse software systems, including processing-intensive analytics, novel algorithm development, manipulation of extremely large data sets, real-time systems, and business management information systems, based upon documented
requirements.
  • Provide specific input to software component design, including hardware/software trade-offs, software reuse, use of COTS/GOTS in place of new development, and
    • Design, implement, and integrate software applications or perform software engineering tasks.
    • Utilize software engineering and design methodologies appropriate to the development, integration, and production environment.
    • Ensure efficient delivery of software engineering capabilities using industry standards and repeatable processes.
    • Mitigate risks, control costs and schedule variance, and effectively manage large-scale, integrated software projects.
    • Review and test software components for adherence to design
requirements and document test results. Required
    • Active TS/SCI with CI Polygraph.
    • Demonstrated
experience as a backend developer.
  • Demonstrated
experience in data engineering and API development.
  • Experience building scalable systems with Python and FastAPI.
•
    • Proficiency in Python.
    • Proficiency in FastAPI.
    • Proficiency in PostgreSQL.
    • Proficiency in Elasticsearch.
Experience building high-performance API connections between high-speed, high-volume, mission-critical, data-sensitive systems. Preferred Qualifications
  • Experience supporting processing-intensive analytics environments.
  • Experience working with extremely large data sets.
  • Experience supporting real-time systems.
  • Experience contributing to software design decisions involving software reuse, COTS/GOTS, and system-to-component
requirements analysis. Required Education and Experience Equivalency
  • High School Diploma/GED with 13 years of
experience.
  • Associates Degree with 11 years of
experience.
  • Bachelors' Degree with 9 years of
experience.
  • Masters' Degree with 7 years of
experience.
  • PhD with 5 years of
experience. Required Certifications
  • None specified. Required Security
Clearance
  • Active TS/SCI with CI Polygraph.

Job ID

4475
About Base-2 Solutions
Go to job list