Senior Fullstack SDK Engineer (AI)

TL;DR

Senior Fullstack SDK Engineer (AI): Building and evolving multi-platform SDKs (Android, iOS, Node, Go) and developer tools with an accent on API design and developer experience. Focus on integrating AI agents for codebase management, optimizing CI/CD infrastructure, and improving SDK delivery.

Location: Remote (Americas)

Salary: $150,000 - $200,000 USD

Company

hirify.global powers automated communication for over 9,000 companies using real-time behavioral data to send smarter, relevant messages.

What you will do

• Build and evolve SDKs across Android, iOS, Node, and Go, alongside supporting developer tools.
• Lead SDK initiatives end-to-end, from setting technical direction to managing releases.
• Optimize delivery infrastructure, including CI, automated testing, versioning, and publishing processes.
• Partner with product and design to translate goals into a high-quality developer experience.
• Use AI agents (e.g., Claude, Cursor, Codex) to manage multi-file changes across unfamiliar codebases.
• Engage with customers to understand and implement necessary SDK integration features.

Requirements

• Expert competency in at least one established programming language with strong software and API design fundamentals.
• Must be based in the Americas.
• Exceptional fluency with current LLMs and agentic coding tools for autonomous workflow.
• Experience building mature, production-quality software and understanding developer consumption patterns.
• Strong written and verbal communication for explaining technical tradeoffs.
• Ability to work effectively across multiple languages and stacks (Swift, Kotlin, Node, Go).

Nice to have

• Experience building external-facing SDKs, APIs, or developer tools.
• Experience owning CI, testing, versioning, or release infrastructure.
• Forward-deployed engineering experience.

Culture & Benefits

• 100% coverage of medical, dental, vision, and mental health insurance premiums for employees and families.
• 16 weeks paid parental leave and unlimited PTO.
• Stipends for remote work and wellness.
• Dedicated professional development budget.
• Culture centered on ownership, product taste, and transparency.

Hiring process

• Recruiter Call (30 mins) to discuss fit and expectations.
• Hiring Manager & AI Skills Interview (60 mins) focusing on autonomy and AI workflow.
• Practical AI-Enabled Coding Round (60 mins) involving a live collaborative SDK extension using AI tools.