CareerPlan

Full-Stack Developer (w/m/d)

Köln / HybridFull-time2026-06-08 → 2026-11-10
Hybrid

Core

Building and evolving SVEN, a live AI assistant for customer service that analyzes tickets, retrieves knowledge via RAG from Jira/Confluence/Slack, and automates tasks.

Role type

Full-Stack Developer (AI Product)

Builds

SVEN AI assistant and AI Studio features

Domain

Fintech / AI / Customer Service

Deliverable

production ML models

Required skills

TypeScript, Next.js (App Router), React, Tailwind CSS, PostgreSQL, Prisma, pgvector, LLMs, RAG, API Integrations

Preferred skills

Prompt Engineering, Auth Flows, UX Design, Modern AI Coding Tools

Technologies

Next.js, React, TypeScript, Tailwind CSS, shadcn/ui, PostgreSQL, Prisma, pgvector, Jira, Confluence, Slack, Microsoft Graph API, Clerk, Langfuse, PostHog, Marker.io, Linear, Google Cloud

Responsibilities

Develop frontend and backend for SVEN/AI Studio; Maintain and expand RAG pipeline; Build integrations with Jira, Confluence, Slack, and Outlook; Design database structures and auth/roles; Integrate AI components for productivity; Evaluate feasibility and scalability of new features; Collaborate with Customer Service and Business teams; Ensure stability and quality with clean error handling.

Seniority

Mid-Senior, hands-on IC