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Senior Full-Stack Developer (Node.js, React)

Remote from Spain·Added 3 days ago

Intellectsoft

8 open roles

Overview

Job details

  • Fully remote

    Per the ad.

Requirements

  • Have the right to work in Spain

    Intellectsoft doesn't mention sponsorship in the ad.

  • Work in English

    English is required, per the ad.

  • Have 5+ years of experience

    Senior-level role.

Pay & benefits

What you'll get

  • Udemy courses of your choice
  • Team-buildings, events, marathons & charity activities to connect and recharge
  • Workshops, trainings, expert knowledge-sharing that keep you growing
  • Clear career path
  • Absence days for work-life balance
  • Flexible hours & work setup - work from any of listed locations and organize your day your way

Requirements

What we're looking for

  • 5+ years of professional software engineering experience with TypeScript end-to-end across backend and frontend environments.
  • Backend Mastery: Strong production experience with NestJS (Modules, Guards, Interceptors, Pipes) and Node.js.
  • Frontend Mastery: Deep experience with ReactJS (hooks, state management, modern UI patterns) and React Native (iOS & Android).
  • PostgreSQL Expertise: Proven experience with relational database design, complex SQL queries, migrations, and ORMs (Prisma or TypeORM).
  • Advanced AI Usage & Vector Search: Proven experience working with LLM APIs / Providers (AWS Bedrock, OpenAI, Anthropic Claude), vector search databases (pgvector, Pinecone, or Qdrant), and RAG architecture.
  • AWS & Infrastructure: Hands-on experience with managed AWS services (ECS Fargate, S3, Cognito, EventBridge, SQS, KMS, Secrets Manager).
  • State & Data Fetching: Proficiency with asynchronous data fetching libraries (e.g., TanStack Query / React Query), REST APIs, and typed API client generation.
  • Authentication & RBAC: Experience implementing multi-tenant auth workflows (OAuth2, JWTs, SSO federation) and strict permission matrices.

Nice to have

  • 5+ years of professional software engineering experience with TypeScript end-to-end across backend and frontend environments.
  • Backend Mastery: Strong production experience with NestJS (Modules, Guards, Interceptors, Pipes) and Node.js.
  • Frontend Mastery: Deep experience with ReactJS (hooks, state management, modern UI patterns) and React Native (iOS & Android).
  • PostgreSQL Expertise: Proven experience with relational database design, complex SQL queries, migrations, and ORMs (Prisma or TypeORM).

The role

We are building a unified, high-touch operational platform for a premier luxury concierge We are building a unified, high-touch operational platform for an ultra-luxury concierge business, replacing a legacy tool sprawl with an enterprise-grade ecosystem. The system runs on a Modular Monolith architecture powered by a NestJS (TypeScript) backend on AWS, servicing three primary user interfaces: an intensive Back Office Admin Panel (ReactJS), a Member Web App (ReactJS), and Member Mobile Apps (React Native).

The platform integrates complex asynchronous communication pipelines (Email, SMS, WhatsApp), AI-assisted operations, spatial/vector databases, and strict security and role-based access controls

What you'll do

  • End-to-End Feature Development: Design, build, and deploy full-stack capabilities across the NestJS API backend and modern React/React Native frontend surfaces.
  • Backend Architecture & Domain Logic: Develop modular NestJS domain services, RESTful APIs, OpenAPI specs, and resilient third-party integrations (Twilio, Klaviyo, Google Places/Maps, Attio CRM, Shopify).
  • Frontend Application Engineering: Build complex, high-density administrative interfaces in ReactJS (pnpm/Nx workspace, TanStack Query, typed contracts) and cross-platform mobile app components in React Native.
  • Database & Search: Implement relational schemas and query optimizations in Aurora PostgreSQL (TypeORM/Prisma), including spatial proximity search (PostGIS) and vector embedding indexes (pgvector for AI retrieval).
  • Security & RBAC Implementation: Enforce strict staff and member identity controls (AWS Cognito, Google Workspace SSO), resource/field-level authorization guards, and audit mechanisms for sensitive VIP data (passports, KMS-encrypted payment card boundaries).
  • Asynchronous Processing: Support event-driven ingestion and notification workflows powered by EventBridge, SQS, Lambda, and Webhooks.

About Intellectsoft

Intellectsoft is a global digital transformation and IT consulting company that builds custom software solutions for enterprises. With a workforce of over 2,000 professionals, it operates across multiple industries, including fintech, healthcare, retail, and logistics, delivering services from strategy and design to engineering and managed services. The company has a strong presence in the US and Europe, with its headquarters in Palo Alto, California, and significant delivery centers in Eastern Europe and Latin America.

In Spain, Intellectsoft has an established office in Madrid, which serves as a hub for its operations in the region. The company is known for its international and multicultural work environment, often hiring engineers and architects from around the world. For international professionals, Intellectsoft offers a dynamic environment with opportunities to work on global projects, and the Madrid office provides a gateway to the Spanish tech scene, making it an attractive option for those looking to relocate.

Founded
2007
Employees
1,000–5,000
Headquarters
Palo Alto, USA
In Spain
Barcelona

Good to know if you are moving

  • Intellectsoft has a global presence with delivery centers in Europe, including Spain, which can facilitate a smoother relocation process.
  • The company's multicultural environment and English-speaking work culture make it accessible for international professionals.
  • The Barcelona office is a key hub for the company's operations in Southern Europe, offering opportunities to work with a diverse, international client base.
  • Intellectsoft provides a comprehensive relocation package for employees moving to Spain, including assistance with visas and work permits.
  • The company is known for its flexible work arrangements, including remote work options, which can be beneficial during the relocation period.

In their own words

About the company & team

Intellectsoft is a software development company delivering innovative solutions since 2007. We operate across North America, Latin America, the Nordic region, the UK, and Europe. We specialize in industries like Fintech, Healthcare, EdTech, Construction, Hospitality, and more, partnering with startups, mid-sized businesses, and Fortune 500 companies to drive innovation and scalability. Our clients include Jaguar Motors, Universal Pictures, Harley-Davidson, and many more where our teams are making daily impact Together, our team delivers solutions that make a difference. Learn more at www.intellectsoft.net

All open roles at Intellectsoft
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