Senior Software Engineer (Bitcoin)

TL;DR

Fullstack Software Engineer (Bitcoin): Building and optimizing customer-facing web experiences and backend services for Bitkey, a Bitcoin self-custody wallet, with an accent on end-to-end product ownership, API design, and web interface development. Focus on architectural discussions, improving system reliability, and leveraging AI-powered development tools for performance and scalability.

Location: Remote (US only)

Salary: $185,200–$326,800 USD (based on US location zone)

Company

hirify.global, Inc. builds technology to increase access to the global economy through its various brands like Square, Cash App, Afterpay, TIDAL, Bitkey, and Proto.

What you will do

• Design, build, and maintain backend services and APIs that support Bitkey's public website, purchase flows, and customer-facing products.
• Build and evolve web-based experiences, including product/marketing surfaces and checkout flows.
• Partner closely with product, design, and growth teams to improve conversion, reliability, and user experience.
• Own features end-to-end, from backend logic and data models through frontend workflows and integrations.
• Collaborate with mobile/platform teams and design technologists to ensure web and service-backed flows integrate cleanly into the broader Bitkey experience.
• Contribute to architectural discussions and leverage AI-powered development tools.

Requirements

• 5+ years of relevant industry experience building and operating backend systems in production, particularly APIs and services.
• Solid fullstack experience, with the ability to contribute to modern web frontends (e.g., React or similar frameworks).
• Strong backend skillset: comfort with data modeling, service design, and operational ownership.
• Experience collaborating closely with product managers, designers, and cross-functional partners.
• Strong engineering fundamentals, including testing, debugging, and performance tuning.
• Work location must be in the US.

Nice to have

• Experience working on public websites, growth funnels, or marketing surfaces.
• Familiarity with Kotlin, Rust, or similar strongly typed languages.
• Experience contributing to mobile applications (Android or iOS).
• Interest in Bitcoin, financial products, or consumer fintech.

Culture & Benefits

• Remote work and flexible time off.
• Medical insurance and retirement savings plans.
• Support for modern family planning.
• Commitment to building a more inclusive economy and workplace.
• Opportunity to work on various products aimed at economic empowerment.

Hiring process

• Automated AI tools may be used to evaluate job applications.
• Candidates may submit up to 9 active applications within a 60-day period.