Senior Go Backend Engineer for High-Throughput Systems

twenty; Arlington (NY); On-site; USD 140,000 - 230,000; Full time

Benefits offered by this job

Health, dental, and vision plans

Paid parental leave

Flexible PTO

401(k) with pre-tax and Roth options

Job summary

Twenty Technologies is seeking a seasoned backend engineer to build the backbone of our cyber operations platform. You’ll design scalable Go services, ingest real-time signals, model complex relationships, and deliver high-throughput APIs for mission-critical capabilities.

Work spans cloud and on-prem environments, emphasizes security, reliability, and performance, and requires collaboration with product, frontend, and domain experts to ship durable platform features.

Qualifications

• 5+ years of professional software development experience building backend (or full-stack) applications.
• Strong proficiency with Go (Golang) and have shipped production services with it.
• Experience working with graph databases (Neo4j, AWS Neptune, or similar), including schema design and query performance.
• Working knowledge of event-driven architectures and message queues/streaming systems.
• Experience building and maintaining APIs (REST and/or GraphQL).
• Experience with cloud infrastructure, ideally AWS, and understand cloud-native deployment patterns.
• Hands-on experience with containerization and microservices architectures.
• Strong foundation in secure coding practices and can reason about security tradeoffs.
• Bachelor’s degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience.

Responsibilities

• Design and implement scalable backend services in Go that improve operator decision-making and response.
• Build high-performance APIs that power customer-facing workflows and internal platform capabilities.
• Model complex relationships in graph databases and optimize schemas and queries for speed and clarity.
• Implement event-driven systems (e.g., with NATS) to process real-time operational data streams.
• Develop and maintain automated tests to protect correctness, security, and performance as the system evolves.
• Build and operate microservices deployed on AWS, with an eye toward resilience and cost-aware scaling.
• Create and improve CI/CD pipelines that enable fast, secure delivery of new capabilities.
• Partner with cyber operations experts to translate domain needs into robust product features.
• Collaborate with frontend engineers on API contracts and data structures that are efficient and usable.
• Evaluate new technologies and patterns that could unlock better operational outcomes.

Skills

Go (Golang)

Graph databases

Event-driven architectures

APIs (REST/GraphQL)

Cloud AWS

Containers

Secure coding

Bachelor's degree

Education

Bachelor's degree in Computer Science or related field

Job description

Twenty Technologies is seeking a seasoned backend engineer to build the backbone of our cyber operations platform. You’ll design scalable Go services, ingest real-time signals, model complex relationships, and deliver high-throughput APIs for mission-critical capabilities.

Work spans cloud and on-prem environments, emphasizes security, reliability, and performance, and requires collaboration with product, frontend, and domain experts to ship durable platform features.