Fullstack Developer (React, Node.js, Next.js)

density of top talents, excellent quality of life, and strong infrastructure. Fluent, accent-neutral English or fluent German is required. Clear, precise communication is essential for effective collaboration. You will develop core functionalities of our AI platform and work onsite in Cádiz, Spain, shoulder to shoulder daily with our lead developer & co-founder-short distances, quick decisions, maximum impact. Responsibilities * Integrating our voice / phone agents with telephony / SIP providers, transcription / TTS services. * Privacy-by-design, logging, observability, and cost control for multi-model setups (tokens). * Frontend: React (TypeScript), Next.js, Zustand / Redux, Vite; Backend: Node.js / TypeScript (NestJS / Express), GraphQL / REST, WebSockets. * Data & AI: MongoDB (Atlas), Pinecone (or Weaviate / pgvector), LangChain / LlamaIndex, embeddings & fine-tuning pipelines. * Cloud & DevOps: AWS (ECS / EKS or Fargate, Lambda, S3, CloudFront, API Gateway, SQS

SNS), Docker, Terraform / CDK, GitHub Actions. * Automation: Siteware, make & n8n (self-hosted), cron / queues, secrets management (AWS Secrets Manager). * Twilio / Plivo, Whisper, ElevenLabs. * Data pipelines (Airbyte / dbt), OpenTelemetry, SSO / OAuth, rate limiting, cost budgets. * From chat to phone agents-real business processes, no lab project. * Privacy "made in Germany": GDPR-compliant platform, EU servers, trust center. * Learning budget & hardware choice, modern tools, peer reviews, CI / CD. * Location advantage Málaga-Area: Working in a European AI / cybersecurity hotspot with a strong community (GSEC, Málaga TechPark). * Close collaboration with our lead developer & co-founder-pairing, architecture sessions, joint customer demos. * Send us your resume, GitHub / portfolio, and 2-3 short bullet points about an AI project (role, stack, impact) via our contact page (navigation "Contact") or directly via the support / sales contact on the website. Subject: "Full-Stack Cádiz." Qualifications * 4+ years full-stack (React / TypeScript + Node.js) in production SaaS systems. * Deep AWS experience (infrastructure as code, containers / Lambda, monitoring). * MongoDB in production (schema design, performance, indexes). * Vector databases & RAG (preferably Pinecone) - from chunking to retrieval tuning. * Onsite mindset: willingness to work closely onsite in Cádiz, Spain with the co-founder / lead engineer (not a pure remote role). * German or Spanish; fluent English spoken and written. Process 75-minute tech talk with a small code walkthrough (no Leetcode) with technical lead and co-founder. 1 month meet & build remote with the co-founder (architecture session & pairing) with technical lead and co-founder. Meet & build onsite with the co-founder (architecture session & pairing) with technical lead and co-founder. After 2 to 4 months: offer for permanent employment

Full-Stack Developer (AWS | React | MongoDB | Pinecone | AI) Only onsite in Cádiz, Spain. We are hiring only candidates who are Spanish citizens or hold permanent residency in Spain. Siteware is a leading German AI SaaS platform, enabling companies to build and operate productive AI agents without coding-from chat agents to phone / voice bots to task agents. Core components include our app marketplace, an agent builder, model orchestration (e.g., ChatGPT, Gemini, Claude, DALL·E, Midjourney), as well as our proprietary technologies DMSP - Dynamic Multi Step Prompting and SiteCore for quality assurance of knowledge data. Data protection is our top priority: GDPR-compliant, EU servers, and our own trust center. We are expanding our engineering presence in the Málaga area (Our Office is in Cádiz, Spain) - one of Europe's most dynamic tech hubs with Málaga TechPark and a new Google Security Engineering Center (GSEC) in the city. This allows you to work in an environment with a high