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B3 / B4 Software Engineer

Apex Systems | Redondo Beach, United States | Posted June 19, 2026

Position Overview

Job#: 3031886

Job Description:

Software Engineer 2

Location: Redondo Beach, California (Onsite)

Employment Type: Contract

Clearance: Top Secret / SCI

Role Overview

An opportunity is available for an Intermediate to Senior Software Engineer to support a large, restricted team focused on the development and sustainment of mission-operational software product lines. This role involves working on new capabilities for a national security mission. This position is 100% on-site in a specialized facility.

Key Responsibilities
  • Perform as a C++ software developer in a fast-paced agile team environment using Red Hat Enterprise Linux (RHEL).
  • Design, code, and unit test new software capabilities based on mathematical algorithm requirements.
  • Identify, troubleshoot, and provide software fixes for discrepancy reports.
  • Collaborate with subject matter experts and senior engineers across multiple software s...

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