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Join 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 Principal Software Engineer to lead the design, development, and scaling of our core backend systems. In this role, you’ll own critical projects while setting technical direction and ensuring our platform is fast, resilient, and secure. This is more than a coding role. You’ll make key architectural decisions, drive engineering standards, and mentor senior engineers. You’ll work with product, security, and leadership to align technical execution with company strategy and ensure our systems perform under the high-stakes demands of financial workflows.
Job Responsibility:
Lead the design and development of scalable, secure backend services and APIs
Define and evolve architecture for databases, microservices, and integrations
Own mission-critical projects end to end, from requirements to production and iteration
Troubleshoot and resolve complex performance and reliability challenges at scale
Drive improvements to CI/CD, observability, and engineering processes across teams
Collaborate with leadership to shape roadmap priorities and long-term technical vision
Mentor engineers, promote best practices, and represent Dfns in client discussions
Requirements:
10+ years of backend software engineering, with leadership in fintech or blockchain
Mastery of TypeScript plus one or more systems languages (Rust, Go, C++)
Proven track record building scalable APIs, infrastructure, and developer platforms
Deep expertise with databases (PostgreSQL, DynamoDB, NoSQL) and cloud (AWS)
Strong knowledge of microservices, CI/CD pipelines, observability, and SSDLC
Familiar with applied cryptography, PKI, and secure backend architectures
Exceptional problem-solving, communication, and ability to influence technical direction