Cryptography Engineer: Build Secure Card Processing

United States Digital Space LLC; Bellevue (CA); Hybrid; USD 166,000 - 195,000; Full time

Benefits offered by this job

Health insurance

401(k) matching

Equity ownership

Mental health benefits

Job summary

United States Digital Space LLC in Bellevue, WA and Menlo Park, CA is seeking a cryptographic services engineer to help design, build, and operate our new in‑house card‑processing service, protecting sensitive financial data.

You will work across software, infrastructure, and security, write production code, and participate in on‑call rotations while growing your security engineering skills on the job.

Qualifications

• Experience building, operating, or supporting production services, distributed systems, or infrastructure.
• Proficiency writing production code in at least one modern programming language (such as Python, Go, Java, C#, or C++) with a strong ability to reason about complex systems.
• Comfort working across multiple technical domains, including software development, infrastructure, and operational reliability.
• Clear and concise communication skills, with a demonstrated ability to explain technical decisions and proactively collaborate when facing challenges.
• Curiosity and willingness to learn security engineering principles and participate in a light on-call rotation.

Responsibilities

• Design, build, and maintain production services and infrastructure supporting key management, encryption, and decryption functions.
• Help architect, launch, and scale the company’s new in-house card-processing environment to protect sensitive card, financial, and tax-related data.
• Write clean, maintainable production code and build operational tooling across software, infrastructure, and security controls.
• Collaborate with internal engineering teams to support migrations, drive adoption of shared cryptographic capabilities, and ensure safe system design.
• Participate in a rotating on-call schedule to maintain high availability, security, and operational reliability as processing volume grows.

Skills

Distributed systems

Production code

Python

Go

Java

C#

C++

Security mindset

Tools

Kubernetes

AWS

GCP

Job description

United States Digital Space LLC in Bellevue, WA and Menlo Park, CA is seeking a cryptographic services engineer to help design, build, and operate our new in‑house card‑processing service, protecting sensitive financial data.

You will work across software, infrastructure, and security, write production code, and participate in on‑call rotations while growing your security engineering skills on the job.