Software Engineer Level 4

Base-2 Solutions, LLC.; Washington (District of Columbia); On-site; USD 120,000 - 170,000; Full time

Job summary

Base-2 Solutions is seeking a Software Engineer Level 4 to develop, maintain, and enhance backend systems for mission-focused environments. The role emphasizes Python, FastAPI, PostgreSQL, and scalable data-intensive integrations.

You will contribute to database design, API development, and high-performance data workflows while adhering to security and reliability requirements. Active TS/SCI with CI Polygraph is required, with a focus on robust, scalable software solutions.

Qualifications

• Active TS/SCI with CI Polygraph is required.

Responsibilities

• Develop, maintain, and enhance complex software systems including processing-intensive analytics and real-time components.
• Provide input to software component design including hardware/software trade-offs and system-level requirements.
• Design, implement, and integrate software applications or perform software engineering tasks.
• Apply software engineering methodologies appropriate to the development, integration, and production environment.
• Ensure efficient delivery of software capabilities using industry standards and repeatable processes.
• Mitigate risks, control costs and schedule variance on large-scale projects.
• Review and test software components for adherence to design requirements and document test results.

Skills

Backend development

Data engineering

API development

Python

FastAPI

PostgreSQL

Elasticsearch

Education

High School Diploma/GED with 13 years experience

Associates Degree with 11 years experience

Bachelor's Degree with 9 years experience

Masters' Degree with 7 years experience

PhD with 5 years experience

Tools

PostgreSQL tooling

Job description

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 requirements analysis and synthesis from the system level to individual software components.
• 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 Qualifications

• 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.
• Experience designing and managing PostgreSQL databases with efficient SQL and indexing strategies.
• 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.

RequiredCertifications

• None specified.

Required Security Clearance

• Active TS/SCI with CI Polygraph.