Senior AI Engineer (f/m/d)

l, 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 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 workflowsDevelop LLM-based systems using modern frameworks and prompt engineering with quality controlIntegrate AI capabilities with existing systems and APIsOptimize performance, cost, and reliability of AI features What makes it special High ownership: you'll shape what we build and how we build itTight feedback loops with domain experts and customersPragmatic pace: ship, learn, iterate, without sacrificing quality Your profile Your Experience & Mindset You have 5+ years experience in Software Engineering and AIYou'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 whyExperience with RESTful APIs, cloud services, and testing/QA for AI systemsYou'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 AIStrong 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. Intro Call with our Talent TeamDeep dive Interview with our CTO & co-founderOn-site Coding Interview at our Berlin office with the engineering teamFounder Conversation with our CEO & co-founder Our offer Above-market salaryDirect line to the Founders: no filter, no queue, no committeeTotal autonomy on what you build; we measure hours savedThe best tools, no questions asked: Claude Max, Cursor, OpenAI, whatever ships next weekInternal tools and resources purpose-built to support agentic AI development at scale, read about how we work at engineering.integral.de28 vacation days per year, plus half-days on December 24 and 31Either Urban Sports Club membership, coupons via Hrmony or Deutschlandticket, your choiceLaptop of your choice: MacBook Pro or WindowsCompany pension scheme (bAV)Modern office in the heart of Berlin Mitte, right next to MauerparkWeekly team lunches on us, office BBQs, and a dinner budget for late nights after 8pmA team of 50+ (and growing!) ambitious, diverse people, 20%+ ex-founders learning and building togetherThe opportunity of a decade to build a -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. Skills: Engineering