Senior Infrastructure Engineer

Dfns; New York (NY); Hybrid; USD 220,000 - 300,000; Full time

Benefits offered by this job

Healthcare

Travel expenses

Stock options

Remote-first; office optional

Job summary

Dfns is hiring a Senior Infrastructure Engineer to design, operate, and scale the systems powering our platform, focusing on reliability, security, and performance for wallet services and blockchain integrations.

You will work at the intersection of distributed systems, security, and cloud infrastructure and drive automation, deployment, monitoring, and secure architecture decisions across teams.

Qualifications

• 8+ years of infrastructure, DevOps, or SRE experience in cloud-native systems.
• Extensive AWS experience; familiarity with GCP/IBM/Thales is a plus.
• Proficient with Terraform and CI/CD automation.
• Deep knowledge of Docker, Kubernetes, and containerized microservices.
• Experience administering and tuning SQL and NoSQL databases.
• Familiar with observability platforms (Datadog, ELK, Prometheus/Grafana).
• Security-focused infrastructure knowledge (PKI) and scripting (Python, Rust, TypeScript).
• Strong communication under pressure; blockchain experience is a plus.

Responsibilities

• Design, build, and maintain scalable, secure cloud infrastructure.
• Architect and operate containerized systems (Docker, Kubernetes).
• Automate provisioning and deployments using Terraform, Jenkins, and CI/CD pipelines.
• Implement observability with Datadog across logs, metrics, and traces.
• Optimize performance and reliability of Node.js applications and backend services.
• Configure and manage secure enclaves (AWS Nitro) to harden critical workflows.
• Partner with product and security to align infra decisions with roadmap and risk strategy.
• Document systems, promote knowledge sharing, and support client discussions.

Skills

SRE experience

Communication skills

Scripting

Tools

Terraform

CI/CD

Docker

Kubernetes

Datadog

ELK

Prometheus Grafana

AWS

GCP

SQL/NoSQL

Python

Rust

TypeScript

Job description

Join a team of engineers and cryptographers building the infrastructure behind the next generation of financial systems.

We’re hiring a Senior Infrastructure Engineer to design, operate, and scale the systems that power our platform. You’ll build and maintain the infrastructure that supports wallet services, transaction processing, and blockchain integrations. You’ll work at the intersection of distributed systems, security, and cloud infrastructure to ensure our platform remains reliable, secure, and performant. This role goes beyond operating infrastructure. You’ll help design resilient architectures, automate operations, and improve how we deploy, monitor, and secure our systems. You’ll work closely with engineering, product, and security teams to deliver infrastructure that scales with real-world financial workloads.

Responsibilities

• Design, build, and maintain cloud infrastructure with a focus on scalability and security.

• Architect and operate containerized and orchestrated systems (Docker, Kubernetes).

• Automate provisioning and deployments using Terraform, Jenkins, and CI/CD pipelines.

• Implement and maintain observability with Datadog across logs, metrics, and traces.

• Optimize performance and reliability of Node.js applications and backend services.

• Configure and manage secure enclaves (AWS Nitro) to harden critical workflows.

• Partner with product and security to align infra decisions with roadmap and risk strategy.

• Document systems, promote knowledge sharing, and support client discussions.

Requirements

• 8+ years of infrastructure, DevOps, or SRE experience in cloud-native systems.

• Strong expertise with AWS (GCP is a plus; IBM and Thales are a plus too).

• Skilled in Infrastructure-as-Code (Terraform) and CI/CD automations.

• Deep knowledge of Docker, Kubernetes, and containerized microservices.

• Experience administering and tuning SQL and NoSQL databases.

• Familiar with observability platforms (Datadog, ELK, Prometheus/Grafana).

• Solid understanding of infrastructure security and PKI fundamentals.

• Proficiency in scripting and systems programming (Python, Rust, TypeScript).

• Clear communication skills and ability to operate reasonably under pressure.

• Ideally, experience with blockchain networks, nodes, and smart contracts.

Recruitment process

• Intro call with Co-CEO (30 min)

• Personality and cognitive tests (45 min)

• Coding test in a language of your choice

• Focus interviews with the hiring panel (180 min)

  • Code review

  • Architecture review

  • Security fundamentals

  • Culture check fit

• Final interview with CTO (30 min)

• Reference calls and background checks

Terms

• Title: Senior Infrastructure Engineer.

• Salary: $220,000-300,000 per year (full-time).

• Equity: 100-200 stock options vested over 4 years.

• Benefits: Healthcare and travel expenses.

• Location: United States (remote-first, office optional).

• Equipment: MacBook Pro + essentials.