Senior Software Engineer, Fullstack (CDP API)

TL;DR

Senior Software Engineer, Fullstack (CDP API): Designing, developing, and maintaining ergonomic, open-source SDKs and scalable interaction patterns for crypto applications with an accent on embedded wallets, user authentication, and API architecture. Focus on building compelling onboarding flows, ensuring system stability, reliability, and security, and evangelizing SDKs within the crypto community.

Location: This is a hybrid role, requiring in-person attendance for team and company-wide offsites multiple times annually. Candidates must be authorized to work in the US, as indicated by US-specific benefits like 401(k), E-Verify participation, HSA, and FSA.

Salary: $186,065–$218,900 USD

Company

hirify.global is building the emerging onchain platform to increase economic freedom in the world and advance the future global financial system.

What you will do

• Design, develop, and maintain ergonomic, open-source SDKs for embedded wallets using Typescript, React, React Native, Android, iOS, Unity, and Flutter.
• Build scalable interaction patterns for end-user authentication using OAuth, PKCE, Email/SNS OTP, and Passkeys.
• Interface with and conform to HTTP REST API definitions using OpenAPI specifications.
• Author, publish, and maintain clear and concise documentation, including quickstart and how-to guides, to increase SDK adoption.
• Work closely with internal hirify.global teams and external customers to integrate and iteratively improve APIs and SDKs.
• Evangelize the SDK in the crypto community and build compelling sample applications to demonstrate its value and test developer experience.

Requirements

• 5+ years of experience in fullstack development.
• Fluency in Typescript, React, and React Native, with strong experience in at least one of Android, iOS, Unity, or Flutter.
• Experience with user authentication, Identity and Access Management (IAM) systems, and public key cryptography.
• Strong understanding of distributed systems, microservices, streaming, and event-driven architectures.
• Fluency with crypto wallets, key management, cryptography, and blockchain protocols (e.g., EVM, Solana).
• Understanding of security best practices and experience with secure coding for financial systems.

Culture & Benefits

• Comprehensive medical, dental, and vision plans.
• Health Savings Account with company contributions and a 401(k) plan with company match.
• Wellness stipend and mobile/internet reimbursement.
• Generous time off/leave policy and volunteer time off.
• Fertility counseling and benefits.
• Option to receive payment in digital currency.