Senior/Staff Fullstack Engineer (m/f/x)

Senior/Staff Fullstack Engineer (m/f/x) LocationBerlinEmployment TypeFull timeLocation TypeOn-siteDepartmentEngineeringAbout usWe’re Cortea, a Berlin startup transforming audits with AI. Manual, document-heavy audits waste expert time while demand keeps rising. Our AI-powered software and specialized AI agents remove the repetitive work so auditors can focus on judgment. Backed by top-tier VCs with >15m funding, with a working product and paying customers, we’re rapidly scaling.We value first-principles thinking, speed, trust, and kindness. We build side by side in our Berlin office.Your RoleWe're looking for an experienced engineer who's happy anywhere in the stack and turns complex audit workflows into product auditors rely on every day. You pick up whatever a problem needs, from the data model to the interface to the agents behind it.A lot of what we build has no reference implementation. You're comfortable wading into something nobody has solved yet and shipping a first version that actually works.Our engineering team is a small, flat group of builders: strong ICs who open a laptop when they see a problem instead of scheduling a meeting. Everyone owns real product and architecture decisions, and that's exactly what we want more of.What you'll doBuild the interfaces auditors work in, partnering with design to turn complex flows into something that feels effortlessBuild and improve the agents at the core of the product, plus the harnesses and eval pipelines around themMake the long-running workflows behind the product reliable and debuggable, so failures surface fast instead of silentlyUse AI heavily in your own workflow to move faster, without ever shipping output you can't stand behindDrive the how in RFCs and technical discussions with other engineers, and partner with product on the whatQualificationsYou'll fit here if you:Have 5+ years shipping production web applications across the stackWrite production APIs and model the data behind them so it holds up under multi-tenancy and loadAre strong on the frontend and can build genuinely complex UIGet how LLM agents actually work: agents, harnesses, tool use, and measuring quality with evalsKeep up with where AI is moving and bring the latest tools into how you work to make yourself fasterBring a strong product mindset and real ownership of outcomesMake architectural decisions, weigh trade-offs, and build things other engineers can extendAre comfortable with ambiguity and work things out from fundamentals when there's no established answerNice-to-haves that are a plus:Hands-on experience building agents, harnesses, or eval pipelinesData-dense or workflow-heavy B2B productsScaling multi-tenant systems as data and traffic growAudit, finance, compliance, or another domain where being wrong is expensiveEarly-stage startup or fast-moving engineering environmentNo one checks every box. If you ship across frontend, backend, and data and own what you build, let's talk.Our techReact, TS, Tailwind, TanStackPython, Postgres, Temporal, Kafka, RedisGCP, Azure, k8sGitHub, Linear, Slack, NotionWhat We OfferHigh impact & growth: Front-row seat to scaling an AI startup with real ownership from day oneMission-driven culture: First-principles thinking, bold ideas, and a supportive teamAttractive compensation: competitive salary + meaningful equityPersonal development: Learning budget for courses and conferencesTrue Berlin startup environment: Central Berlin office, team lunches, retreats, flexible vacationInterview processFirst Call — Intro to Cortea with our Founders Associate LizaSecond Call — Technical interview with our Member of Technical Staff JendrikThird Call — Deep dive into our culture with our Co-Founder PhilippOn-site Half-Day (Berlin) — Meet the team and work on a real problem togetherApply for this Job