AI Full Stack Developer

Job not on LinkedIn

🔥 2 minutes ago

🇪🇸 Spain – Remote

⏰ Full Time

🟡 Mid-level

🟠 Senior

🧑‍💻 Full-stack Engineer

👻 Ghost score 12%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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LEADtech

WebsiteLinkedInAll Job Openings

2 - 10 employees

Founded 2017

🛍️ eCommerce

🛒 Retail

🔧 Hardware

eCommerce • Retail • Hardware

LEADtech is an online Romanian retailer and e‑commerce store that offers a broad catalogue of consumer electronics, IT and computer components, mobile phones, home electronics, gaming gear, appliances, tools, garden equipment, baby products and smart home/security devices. The site content (Romanian language, references to "lei" and sections like "Contul Meu") indicates a web storefront selling products from stock with delivery, account/returns support, and extensive category-based merchandising for consumers and small businesses.

📋 Description

• Build and scale AI products as part of AI-LAB • Develop and maintain Next.js frontend features using TypeScript, SWR, Tailwind, a component-driven design system, and internationalization support • Design, implement, and maintain NestJS RESTful APIs for authentication, data processing, billing, usage tracking, and AI workflow orchestration • Own backend services end-to-end, from schema design and migrations through deployment and observability • Integrate and maintain third-party SDKs and APIs for payment processing, authentication, analytics, and messaging • Build AI agents and tools using the Claude SDK and Model Context Protocol (MCP) • Contribute to Prisma and PostgreSQL schema design and migration review • Implement and maintain feature flags, A/B experiments, and analytics events • Handle webhooks and asynchronous task processing for payment-critical and PII-handling code paths • Collaborate with AI product managers and AI specialists to translate requirements into scalable features • Collaborate on application deployment and cloud infrastructure maintenance

🎯 Requirements

• Highly proficient in TypeScript across frontend and backend environments • Strong experience with React and Next.js App Router, including Server Components, route handlers, streaming, metadata, i18n, and modern data-fetching patterns such as SWR • Solid experience building production REST APIs with NestJS or comparable Node frameworks such as Express or Fastify • Knowledge of NestJS modules, dependency injection, guards, interceptors, and DTO validation • Experience with PostgreSQL and an ORM such as Prisma • Comfortable writing and reviewing migrations, reasoning about transactions, and designing schemas that evolve safely • Experience integrating third-party SDKs and APIs • Experience handling webhooks, idempotency, retries, and asynchronous fulfillment • Genuine enthusiasm for AI products and proactively bringing new techniques and tools to the team • Proactive, creative, collaborative, pragmatic, and willing to challenge assumptions • Ability to learn new tools and platforms quickly • Nice to have: payment/subscription systems experience • Nice to have: familiarity with pnpm workspaces, Turborepo, or Nx • Nice to have: BigQuery and event-pipeline analytics experience • Nice to have: Tailwind and component-driven design systems familiarity • Nice to have: knowledge of Google Cloud Platform • Nice to have: experience with feature-flag systems • Nice to have: previous work on AI products or LLM-powered applications

🏖️ Benefits

• High-impact role on a small, agile team building greenfield projects • Modern, carefully selected technology stack • Personalized internal training • Annual budget for external learning opportunities • Flexible schedule with flextime • Option to work fully remote or from the Barcelona office • Free Friday afternoons with a 7-hour workday • 35-hour workweek in July and August • Competitive salary • Full-time permanent contract • Top-tier private health insurance, including dental and psychological services • 25 days of vacation plus birthday off • Flexible vacation options with no blackout days • Barcelona office with free coffee, fresh fruit, snacks, game room, and rooftop terrace • Ticket restaurant and nursery vouchers • Collaborative culture and career development opportunities