Senior Field Engineer – On-Site TS/SCI Cyber Ops

Twenty Technologies; Fort Meade (FL); On-site; USD 150,000 - 230,000; Full time

Benefits offered by this job

Health insurance

Parental leave

Flexible PTO

401(k)

Job summary

Twenty Technologies is seeking a senior software engineer to join a on-site, government-focused program. You will be the generalist engineer for a mission-critical platform deployed in a restricted, air-gapped environment, working directly with Arlington engineers and the customer’s technical staff.

In this role you will navigate a broad range of tasks—from customer-specific feature development to data integration, AI-backed capabilities, and site reliability.

Qualifications

• 6+ years of professional software engineering experience, including production services.
• Proficient in Go, Python, or TypeScript for backend or full-stack features.
• Experience shipping backend services end to end: design, implementation, testing, deployment, and operation.
• Experience debugging production systems: logs, traces, root causes under time pressure.
• Operational fluency: Linux CLI, containers, and observability tooling.

Responsibilities

• Design and implement customer-specific features and integrations for a mission-critical platform.
• Work with customer users and Arlington engineers to scope and deliver requirements while balancing speed and robustness.
• Develop and maintain tests to ensure changes move safely through air-gapped environments.
• Ensure security standards: no hardcoded secrets and auditable credential handling.

Skills

Go

Python

TypeScript

Production systems

Linux

Observability

Tools

Docker

Kubernetes

PostgreSQL

Grafana

NATS

Job description

Twenty Technologies is seeking a senior software engineer to join a on-site, government-focused program. You will be the generalist engineer for a mission-critical platform deployed in a restricted, air-gapped environment, working directly with Arlington engineers and the customer’s technical staff.

In this role you will navigate a broad range of tasks—from customer-specific feature development to data integration, AI-backed capabilities, and site reliability.