Senior Infrastructure Engineer
Dfns is a Wallets-as-a-Service (WaaS) platform that enables fintechs, enterprises, and developers to securely manage digital assets. Utilizing advanced cryptography like multi-party computation (MPC), it offers services to streamline crypto operations and user onboarding. Dfns also operates Dfns Labs, a research team dedicated to enhancing digital asset security.
Projects
About Dfns
Dfns provides a Wallets-as-a-Service (WaaS) platform designed for developers, fintechs, and enterprises to securely manage and trade digital assets. The platform's core security is built on advanced multiparty computation (MPC) and threshold signature schemes (TSS) to decentralize private keys and eliminate single points of failure. Dfns offers a suite of products including Wallet Entitlement Management (WEM) for governance logic and a flexible Key Deployment Service (KDS), with deployment models ranging from managed SaaS to on-premises solutions. The company emphasizes compliance, holding certifications such as SOC 2. Dfns also runs Dfns Labs, a dedicated research and innovation team of cryptographers and security engineers who collaborate with academic institutions, contribute to open-source projects, and work on advancing digital asset security through research in areas like post-quantum cryptography.
Skills
About the Role
You'll design, operate, and scale the systems that power our platform, working at the intersection of distributed systems, security, and cloud infrastructure to keep everything reliable, secure, and performant. You'll build and maintain the infrastructure that supports wallet services, transaction processing, and blockchain integrations. Beyond day-to-day operations, you'll help design resilient architectures, automate operations, and improve how deployments, monitoring, and security are handled. You'll collaborate closely with engineering, product, and security teams to deliver infrastructure that scales with real-world financial workloads.
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
Responsibilities
- Design, build, and maintain cloud infrastructure with a focus on scalability and security
- Architect and operate containerized and orchestrated systems using Docker and 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 teams to align infrastructure decisions with roadmap and risk strategy
- Document systems, promote knowledge sharing, and support client discussions