senior infrastructure engineer

AboutDfns is the leading Wallets-as-a-Service (WaaS) platform, helping fintechs, institutions, and enterprises simplify digital asset management and securely onboard users onchain.Its API-first wallet platform unifies transaction management, workflow governance, key deployment, and third-party integrations into one secure operating system for blockchains. Built on advanced security and cryptography, Dfns is trusted by over 200 financial institutions and applications—including ABN AMRO, Broadridge, Fidelity, Zodia Custody, Banca Sella, Stripe, Moonpay, Circle, IBM, Deblock, and Gemini—and secures over $3 billion in monthly transactions.Founded in 2020, Dfns has raised $30 million from global investors such as White Star Capital, Motive Partners, Bpifrance, Coinbase, Wintermute, and Susquehanna. Originally incubated by Techstars and Station F in Paris, Dfns now operates globally with teams across the US, Europe, the Middle East, and Asia.Job DescriptionJoin a stellar team of leaders and experts in blockchain technology, cryptography, infrastructure, and security to build the backbone of blockchain wallet infrastructure for the next financial era. We're hiring a Senior Infrastructure Engineer to design, operate, and scale the systems that power our platform. You'll work at the intersection of blockchain, cybersecurity, and distributed infrastructure, ensuring our services are reliable, secure, and ready to meet the demands of a trillion-dollar financial industry. This role goes beyond maintaining servers. You'll architect, automate and secure infrastructure, improve resilience, and embed best-in-class DevOps and SRE practices into our workflows. You'll collaborate across engineering, product, and security to translate requirements into infrastructure that is scalable, cost-efficient, and secure.ResponsibilitiesPreferred ExperienceDesign, 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 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.Requirements8+ years of infrastructure, DevOps, or SRE experience in cloud-native systems.Strong expertise with AWS (Lambda, EKS, API Gateway, DynamoDB, S3, CloudFormation, CloudWatch); 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 applied cryptography fundamentals.Proficiency in scripting and systems programming (Python, Go, Rust, or TypeScript).Clear communication skills, ability to operate under pressure and make sound decisions.Ideally, experience with blockchain networks and smart contracts.Recruitment ProcessProcessIntro 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 reviewArchitecture reviewSecurity fundamentalsCulture check fitFinal interview with CTO (30 min).Reference calls and background checks.TermsTitle: Senior Infrastructure Engineer.Salary: $220,000-300,000 per year (full-time).Equity: stock options vested over 4 years.Benefits: Healthcare, 401K, and travel expenses.Location: United States (remote-first, office optional).Equipment: MacBook Pro + essentials.Additional InformationContract Type: Full-TimeLocation: New YorkExperience: > 7 yearsPossible full remoteSalary: between 220000$ and 300000$ / year