Staff Fullstack Engineer (Web3)

TL;DR

Staff Fullstack Engineer (TypeScript/Web3): Designing and building the backend APIs and services for a private digital wealth custody platform with an accent on blockchain interaction layers, secure asset custody, and high-reliability data systems. Focus on rebuilding the platform from the ground up, implementing complex concurrency and failure recovery, and leveraging AI as a core development multiplier.

Location: Remote (Global)

Salary: $80k – $110k

Company

hirify.global is a private custody platform for digital wealth designed for long-term asset security and multi-chain organization.

What you will do

• Design and implement backend APIs and services for wallet management and transaction signing across multiple blockchains.
• Own PostgreSQL schema design for financial and blockchain data, ensuring rigorous data modeling and safe migrations.
• Develop blockchain interaction layers for EVM, Solana, Bitcoin, and Cosmos networks.
• Build asynchronous workflows and webhook handlers for transaction monitoring and wallet lifecycle events.
• Implement systems handling concurrency, idempotency, and failure recovery to protect real assets.
• Support frontend integration using React to accelerate feature delivery and unblock deployment.

Requirements

• 10+ years of professional software engineering experience with a track record of technical leadership.
• 8+ years of experience with TypeScript in both Node.js and React environments.
• Proven experience shipping production Web3 infrastructure, custody systems, or DeFi backends.
• Deep expertise in PostgreSQL, including relational schema design and performance tuning.
• Strong understanding of blockchain fundamentals, including transaction lifecycles, RPC providers, and signing flows.
• Ability to operate autonomously in a small, remote team.

Nice to have

• Production experience with AWS infrastructure (EC2, Lambda, ECS, RDS, S3, Terraform, CDK).
• Familiarity with Dynamic.xyz, Fireblocks, or similar custody providers.
• Knowledge of EIP-712 signing and ERC-20/ERC-721 standards.
• Experience in fintech, private banking, or wealth management technology.
• Advanced integration of AI development tools into daily engineering workflows.

Culture & Benefits

• Fully remote work arrangement with a "work from anywhere" policy.
• Opportunity to work on a greenfield project, replacing legacy architecture from scratch.
• High level of ownership and influence over technical and product decisions in a small team.
• AI-native engineering culture where AI tools are embedded as core infrastructure.
• Competitive compensation including equity and AI subscription payments.

Hiring process

• Recruiter screening.
• Take-home challenge followed by a technical defense.
• Technical and behavioral interviews with the client.