Senior Full-Stack Developer (NestJS, React) (IR-552)

SpainRemoteFull-timesenior

EngineeringFullstack Developer

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Quick Summary

Key Responsibilities

Design, build, and deploy full-stack capabilities across the NestJS API backend and modern React/React Native frontend surfaces.

Requirements Summary

Strong production experience with NestJS (Modules, Guards, Interceptors, Pipes) and Node.js. Frontend Mastery: Deep experience with ReactJS (hooks, state management,

Technical Tools

EngineeringFullstack Developer

Requirements

~1 min read

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

~1 min read

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).

Responsibilities

~1 min read

→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.