Fullstack Engineer (AI)

TL;DR

Fullstack Engineer (AI): Building AI-powered audit software and specialized AI agents with an accent on complex user interfaces and reliable long-running workflows. Focus on designing LLM agent harnesses, implementing eval pipelines, and scaling multi-tenant backend systems.

Location: On-site in Berlin

Company

hirify.global is a Berlin-based startup transforming the audit industry through AI-powered software and specialized agents.

What you will do

• Build intuitive interfaces for auditors, converting complex workflows into effortless user experiences.
• Develop and optimize core AI agents, including their harnesses and evaluation pipelines.
• Ensure reliability and debuggability of long-running product workflows.
• Lead technical discussions via RFCs and collaborate with product teams on feature definitions.
• Make key architectural decisions and design extendable systems.

Requirements

• 5+ years of experience shipping production web applications across the full stack.
• Proficiency in building production APIs and modeling data for multi-tenant systems.
• Strong frontend skills capable of building genuinely complex UIs.
• Deep understanding of LLM agents, tool use, and quality measurement via evals.
• Must be based in or able to work on-site in Berlin.
• Strong product mindset and ownership of outcomes.

Nice to have

• Experience building AI agents, harnesses, or eval pipelines.
• Background in data-dense or workflow-heavy B2B products.
• Experience scaling multi-tenant systems.
• Domain knowledge in audit, finance, or compliance.
• Prior experience in early-stage startups.

Culture & Benefits

• High impact and growth opportunities with real ownership from day one.
• Competitive salary and meaningful equity.
• Dedicated learning budget for courses and conferences.
• Central Berlin office with team lunches, retreats, and flexible vacation.
• First-principles thinking and a supportive, builder-centric culture.

Hiring process

• Introductory call with the Founders Associate.
• Technical interview with a Member of Technical Staff.
• Culture deep dive with the Co-Founder.
• On-site half-day in Berlin to collaborate on a real problem.