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

Intellectsoft is a software development company delivering innovative solutions since 2007 with operations in North America, Latin America, the Nordic region, the UK, and Europe. The company specializes in industries like Fintech, Healthcare, EdTech, Construction, and Hospitality, partnering with startups, mid-sized businesses, and Fortune 500 companies such as Jaguar Motors, Universal Pictures, and Harley-Davidson. The role involves building a unified, high-touch operational platform for an ultra-luxury concierge business, replacing a legacy tool sprawl with a Modular Monolith architecture powered by a NestJS (TypeScript) backend on AWS, servicing three primary user interfaces built with ReactJS and React Native.

• 5+ years of professional experience with TypeScript across backend and frontend environments.
• Strong production experience with NestJS (Modules, Guards, Interceptors, Pipes) and Node.js.
• Deep experience with ReactJS (hooks, state management, modern UI patterns) and React Native for iOS and Android.
• Proven expertise with relational database design, complex SQL queries, migrations, and ORMs such as Prisma or TypeORM for PostgreSQL.
• Experience with advanced AI integrations including LLM APIs/Providers (AWS Bedrock, OpenAI, Anthropic Claude), vector search databases (pgvector, Pinecone, Qdrant), and Retrieval-Augmented Generation (RAG) architectures.
• Hands-on experience with managed AWS services including ECS Fargate, S3, Cognito, EventBridge, SQS, KMS, and Secrets Manager.
• Proficiency with asynchronous data fetching libraries such as TanStack Query / React Query, REST APIs, and typed API client generation.
• Experience implementing multi-tenant authentication workflows (OAuth2, JWTs, SSO federation) and strict permission matrices.

• Design, build, and deploy full-stack features across the NestJS API backend and ReactJS/React Native frontend applications.
• Develop modular NestJS domain services, RESTful APIs, OpenAPI specifications, and resilient integrations with third-party services such as Twilio, Klaviyo, Google Places/Maps, Attio CRM, and Shopify.
• Build complex administrative interfaces using ReactJS and mobile app components in React Native.
• Implement relational schemas and query optimizations in Aurora PostgreSQL with support for spatial search (PostGIS) and vector embedding indexes (pgvector).
• Enforce strict identity and authorization controls using AWS Cognito, Google Workspace SSO, role-based access controls, and audit mechanisms for sensitive data.
• Support event-driven ingestion and notification workflows using AWS EventBridge, SQS, Lambda, and Webhooks.