AI Full Stack Developer
Tech Stack / Keywords
Firma i stanowisko
Leadtech Group builds and scales digital products used by millions of people worldwide. With over 18 years of experience, they bring together multidisciplinary teams to turn ideas into meaningful, high-impact solutions. MAU by Leadtech focuses on subscription-based apps and digital products, combining proven experience with a strong focus on user value and long-term growth. The company operates as a remote-first, international team with experienced professionals across product, tech, data, and design.
Wymagania
- Highly proficient in TypeScript across frontend (React/Next.js) and backend (Node.js/NestJS).
- Strong experience with React and Next.js (App Router) including Server Components, route handlers, streaming, metadata, i18n, and modern data-fetching patterns (SWR or equivalent).
- Solid experience building production REST APIs with NestJS or comparable Node frameworks.
- Experience with PostgreSQL and an ORM such as Prisma; comfortable with migrations, transactions, and schema design.
- Real experience integrating third-party SDKs, handling webhooks, idempotency, retries, and asynchronous fulfillment.
- Collaborative and pragmatic problem-solving mindset.
- Genuine enthusiasm for AI products and proactive adoption of new techniques and tools.
- Creativity and proactivity in proposing features and improving user experience.
- Serious self-learner who adapts quickly to new tools and platforms.
Nice to have:
- Prior experience with payment/subscription systems.
- Familiarity with monorepo tooling (pnpm workspaces, Turborepo, Nx).
- Experience with BigQuery and event-pipeline analytics.
- Familiarity with Tailwind and component-driven design systems.
- Knowledge of Google Cloud Platform (GCP).
- Experience with feature-flag systems.
- Previous work on AI products or LLM-powered applications.
Obowiązki
- Develop and maintain features on Next.js (App Router) frontend using TypeScript, SWR, Tailwind, and a component-driven design system with full internationalization (i18n) support.
- Design, implement, and maintain RESTful APIs with NestJS (TypeScript) to manage authentication, data processing, billing, usage tracking, and orchestration of AI workflows.
- Own backend services end-to-end: from schema design and migrations to deployment and observability.
- Integrate and maintain third-party SDKs and APIs including payment processing, authentication, analytics, and messaging.
- Build AI agents and tools using the Claude SDK and Model Context Protocol (MCP) to give LLMs real-time access to data, APIs, and tools.
- Contribute to schema design with Prisma and PostgreSQL, write and review migrations, and design evolving data models.
- Implement and maintain feature flags, A/B experiments, and analytics events.
- Handle incoming webhooks and asynchronous task processing with rigor for payment-critical and PII-handling code paths.
- Collaborate with AI product managers and AI specialists to translate complex requirements into scalable features.
- Collaborate on application deployment and help maintain cloud infrastructure.
Oferta
- High-impact role in a small, agile team building greenfield projects.
- Work with a cutting-edge, carefully selected tech stack.
- Gain deep experience in AI-driven applications, cloud-native architecture, and real-time systems.
- Startup environment backed by a large, successful company.
- Flexible career path with personalized internal training and an annual budget for external learning.
- Flexible schedule with flextime and option for full remote or office work in Barcelona.
- Free Friday afternoons, 7-hour workdays, and 35-hour workweeks in July and August.
- Competitive salary with full-time permanent contract.
- Top-tier private health insurance including dental and psychological services.
- 25 days of vacation plus birthday off with flexible vacation options.
- Office perks in Barcelona including free coffee, fresh fruit, snacks, game room, and rooftop terrace.
- Additional benefits include ticket restaurant and nursery vouchers paid from gross salary.
Inne informacje
Leadtech is an Equal Employment Opportunity Employer encouraging applications from diverse backgrounds regardless of race, gender, age, religion, nationality, sexual orientation, gender identity, gender expression, and/or disabilities. Personal data provided will be processed for candidacy management with rights to access, rectification, or cancellation exercisable by contacting the company at their Barcelona address or email.
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