Senior Backend Engineer TS/SCI - Real-Time Data & APIs

Base-2 Solutions; Washington (District of Columbia); On-site; USD 150,000 - 210,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

401(k) with company match

Paid time off and holidays

Flexible work schedules

Job summary

Base-2 Solutions is seeking a Principal Software Engineer in Washington, DC, on-site, with a Top Secret/SCI with CI Polygraph clearance. The role focuses on backend development, data engineering, and API work, leveraging Python, FastAPI, PostgreSQL, and high-speed integrations in mission-critical environments.

The position requires strong backend experience, database design, and scalable system development, with daily collaboration across multi-disciplinary teams and strict security controls.

Qualifications

• Demonstrated backend development experience
• Experience with data engineering and API development
• Proficiency in Python and FastAPI
• Experience designing and managing PostgreSQL databases
• Proficiency in Elasticsearch
• Experience building high-performance API connections between systems

Responsibilities

• Develop, maintain, and enhance complex software systems for mission-critical environments
• Provide input on software design, data flows, and system requirements
• Design, implement, and integrate software applications and APIs
• Follow standards and repeatable processes in development and production
• Mitigate risks, control costs, and manage large-scale software projects
• Review and test components for adherence to design requirements and document results

Skills

Python

FastAPI

PostgreSQL

Elasticsearch

API development

Backend developer

Data engineering

Security clearance TS/SCI

Education

Bachelor's degree in CS or related field

Higher education with equivalent experience

Job description

Base-2 Solutions is seeking a Principal Software Engineer in Washington, DC, on-site, with a Top Secret/SCI with CI Polygraph clearance. The role focuses on backend development, data engineering, and API work, leveraging Python, FastAPI, PostgreSQL, and high-speed integrations in mission-critical environments.

The position requires strong backend experience, database design, and scalable system development, with daily collaboration across multi-disciplinary teams and strict security controls.