Senior AI Engineer (f/m/d)

Integral Services · Berlin

Apply on the company website

Mission

Founded in 2024 by Lukas Zörner and Anil Can Baykal, Integral set out to redefine how accounting, taxation and payroll works for SMEs in Europe, starting with Germany. The company is backed by General Catalyst, Cherry Ventures, Puzzle Ventures and entrepreneurs across Europe.
As Senior AI Engineer, you will build intelligent, reliable AI systems that help SMEs navigate financial and tax operations. Own outcomes, not just output, balancing speed and craftsmanship. This role follows a hybrid schedule in our Berlin office to collaborate effectively with the team.

Core responsibilities

What you'll do

• Build and deploy AI agents that automate accounting, payroll, and tax workflows

• Develop LLM-based systems using modern frameworks and prompt engineering with quality control

• Integrate AI capabilities with existing systems and APIs

• Optimize performance, cost, and reliability of AI features

What makes it special

• High ownership: you'll shape what we build and how we build it

• Tight feedback loops with domain experts and customers

• Pragmatic pace: ship, learn, iterate, without sacrificing quality

Your profile

Your Experience & Mindset

• You have 5+ years experience in Software Engineering and AI

• You've worked in early-stage startups or scale-ups where you had to wear multiple hats (coding, testing, UI, integrations)

• Hands-on experience building with LLMs (OpenAI, Anthropic, or similar): APIs, prompt engineering, structured outputs, agent frameworks (LangChain, LangGraph, or similar)

• You actively use AI coding tools like Cursor, Codex, or Claude in your daily workflow — and you can talk about how and why

• Experience with RESTful APIs, cloud services, and testing/QA for AI systems

• You're comfortable with ambiguity and high ownership: you'll manage multiple projects simultaneously and organize your own delivery

Preferred experience

• You came from software engineering and have deliberately moved into AI

• Strong Python skills: you can actually code, not just prompt

The process

We like to move fast, and with the right candidate, the entire process can be completed in less than two weeks.

1. Intro Call with our Talent Team

2. Deep dive Interview with our CTO & co-founder

3. On-site Coding Interview at our Berlin office with the engineering team

4. Founder Conversation with our CEO & co-founder

Our offer

• Above-market salary

• Direct line to the Founders: no filter, no queue, no committee

• Total autonomy on what you build; we measure hours saved

• The best tools, no questions asked: Claude Max, Cursor, OpenAI, whatever ships next week

• Internal tools and resources purpose-built to support agentic AI development at scale, read about how we work at engineering.integral.de

• 28 vacation days per year, plus half-days on December 24 and 31

• Either Urban Sports Club membership, coupons via Hrmony or Deutschlandticket, your choice

• Laptop of your choice: MacBook Pro or Windows

• Company pension scheme (bAV)

• Modern office in the heart of Berlin Mitte, right next to Mauerpark

• Weekly team lunches on us, office BBQs, and a dinner budget for late nights after 8pm

• A team of 50+ (and growing!) ambitious, diverse people, 20%+ ex-founders learning and building together

• The opportunity of a decade to build a category-defining AI-native services leader

We value diversity and hire people based on their abilities and capabilities to succeed in this role. We welcome people of every background, gender, gender identity, sexual orientation, religion, age, disability status, political belief or marital status.

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