Senior Backend Engineer (AI)

TL;DR

Senior Backend Engineer (AI): Building foundational agent infrastructure for an AI assistant that helps developers understand and grow subscription revenue with an accent on orchestration, tool execution, context management, evaluation, and trust layers. Focus on designing reliable, observable, and secure backend systems that enable agent autonomy and support a growth-stage AI-native product.

Location: Remote, Americas and EMEA regions with fully remote work from anywhere

Salary: $230,000 USD annually plus equity

Company

hirify.global is a remote-first startup providing the default monetization platform for mobile in-app subscriptions, processing over $12B in annual purchase volume and serving developers worldwide.

What you will do

• Build and ship core agent infrastructure components including orchestration, evaluation pipelines, tool frameworks, and trust/permissions layers
• Identify and fix reliability and performance gaps in the system
• Collaborate remotely with a distributed team across 25+ countries
• Own projects end-to-end and contribute to architectural discussions
• Participate in incident response and on-call rotations
• Mentor engineers and lead initiatives to improve agent products

Requirements

• 5+ years of experience shipping production backend systems
• Hands-on experience building with LLMs including tool use, structured output, context management, evaluation, and orchestration
• Strong backend fundamentals with focus on reliability, observability, and security
• Comfortable with ambiguity and early-stage product development
• Self-directed and effective communicator in a fully remote culture
• Experience with OpenAI/Anthropic APIs and building agents used by others

Nice to have

• Experience with evaluation and observability frameworks like Langfuse or Langchain
• Familiarity with subscription business models, app stores, or developer tools
• Experience building Slack integrations or conversational interfaces
• Contributions to open-source AI/ML tooling

Culture & Benefits

• Competitive equity in a fast-growing Series C startup backed by Y Combinator
• 10-year window to exercise vested equity options
• Fully remote and flexible work environment
• 4-5 weeks of suggested annual time off for mental, physical, and emotional recharge
• $2,000 USD workspace setup allowance and $1,000 USD annual learning stipend

Hiring process

• Multiple interview stages including technical evaluations and cultural fit discussions
• Focus on candidate clarity and structured feedback