Senior Software Engineer - Distributed Systems (TS/SCI)

Parsons; Reston (VA); On-site; USD 148,000 - 267,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

Paid time off

ESOP

401(k)

Life insurance

Flexible work schedules

Holidays

Job summary

Parsons is seeking highly skilled Software Engineers to design, develop, and support mission-critical information systems worldwide. You will build production services in Java and C/C++, create interface documentation, and participate in on-call rotations.

Expect collaboration with Network Ops, Infrastructure, and Field Engineering, plus automation via GitLab CI/CD and rigorous testing to ensure high availability.

Qualifications

• Bachelors degree and 5-15 years of experience in Software Engineering and/or Development.
• A Masters and Ph.D will count as 2 additional years of experience each.
• Strong proficiency in Java, Scala and/or C/C++ with production-grade development experience.
• Experience building and supporting systems that are distributed, high-availability, or operationally critical.
• Working knowledge of relational databases (PostgreSQL preferred) and/or NoSQL databases (MongoDB preferred).
• Experience with CI/CD pipelines (GitLab CI/CD strongly preferred) and modern development workflows (code review, branching, tagging, release management).
• Ability to troubleshoot production issues using logs, metrics, and structured debugging approaches.
• Strong written communication skills: able to produce clear design notes, runbooks, and implementation plans.
• Active TS/SCI required.
• Domestic and/or international project travel may be required.

Responsibilities

• Develop, enhance, and sustain production services and components written in Java and C/C++.
• Author and maintain interface documentation (schemas, contracts, versioning strategy) and support integration testing.
• Participate in on-call rotation or operational support escalations as required.
• Collaborate with Network Ops, Infrastructure, and Field Engineering teams to diagnose end-to-end failures across distributed environments.
• Develop and maintain build/deployment automation using GitLab CI/CD.
• Write unit, integration, and regression tests for critical services and interfaces.
• Follow configuration management and change control practices required for distributed production systems.
• Rapidly troubleshoot and correct software discrepancies to maximize system availability.

Skills

Java

Scala

C/C++

Distributed systems

PostgreSQL

MongoDB

CI/CD

GitLab

Logging

Education

Bachelor's degree in Computer Science or related field

Master's or PhD counts as 2 years

Tools

ELK stack

Job description

Parsons is seeking highly skilled Software Engineers to design, develop, and support mission-critical information systems worldwide. You will build production services in Java and C/C++, create interface documentation, and participate in on-call rotations.

Expect collaboration with Network Ops, Infrastructure, and Field Engineering, plus automation via GitLab CI/CD and rigorous testing to ensure high availability.