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Senior Back End Developer

Senior Back End Developer

LucaPortugal, Portugal
Há 10 dias
Descrição da vaga

Senior Backend Engineer – Portugal (Full-Time)

Remote / Portugal | 🕒 Time zone : Portugal and Located in Portugal | ⏰ Full-time

At Luca , we’re building the next generation of learning tools for Latin America. We create AI-powered educational products that blend smart design, engaging content, and beautiful technology—used by thousands of students, parents, and schools across the region.

We’re looking for a Senior Backend Engineer with strong experience in TypeScript, GraphQL, and modern cloud-native architecture. If you care about clean systems design, scalability, and want to push the boundaries of what’s possible with AI tools like OpenAI Agent SDK—this role is for you.

What You’ll Be Doing

You’ll work cross-functionally with :

  • Frontend developers to deliver seamless API and data integrations
  • AI engineers to build autonomous agents and prompt-driven logic
  • Infrastructure teams to scale event-driven systems on GCP
  • Product leads to implement resilient and modular backend services
  • DevOps and QA to maintain reliability and traceability across environments

Your Responsibilities

Backend & API Engineering

  • Build and maintain backend services in Node.js + TypeScript , applying clean architecture and DDD where applicable
  • Design and optimize GraphQL APIs , using advanced auth, reusable fragments, and decoupled resolvers
  • Integrate and manage Prisma ORM in high-concurrency, multi-tenant environments

    • Data & Storage

  • Design and optimize complex PostgreSQL schemas : indexes, materialized views, partitions
  • Use Firebase Firestore for NoSQL with efficient modeling, access control, and indexing
  • Implement data backup, replication, and recovery strategies

    • Cloud Infrastructure (GCP)

  • Deploy services on Cloud Run and Cloud Functions with Docker
  • Design event-driven pipelines with Pub / Sub , retries, and dead-letter topics
  • Configure routing, SSL certificates, domain management, and granular bucket policies
  • Implement secure communication using Secrets Manager , VPC connectors , and service-to-service authentication

    • AI Integration with OpenAI

  • Build agent-based features using OpenAI Agent SDK
  • Design modular agent systems, advanced prompting strategies, and reasoning chains
  • Implement embeddings, context caching, and prompt validation pipelines

    • What We’re Looking For

  • 5+ years of experience building modern backend systems
  • Based in Portugal

    • Expertise in :

  • TypeScript (advanced types, decorators, composition)
  • Node.js (streams, clusters, profiling)
  • GraphQL (federation, batching, error masking)
  • Prisma (middlewares, raw queries, performance tuning)
  • PostgreSQL (execution plans, tuning, triggers)
  • Firestore and NoSQL modeling (indexes, TTL, batch consumption)
  • Pub / Sub and event-driven architectures
  • GCP (Cloud Run, Docker, routing, Secrets Manager)
  • OpenAI Agent SDK (agent composition, embeddings, prompting)
  • Experience in :
  • Asynchronous and decoupled system design
  • CI / CD pipelines with GitHub Actions, Cloud Build
  • Observability using Stackdriver / Cloud Logging

    • What We Offer

  • Full-time, 100% remote position based in Portugal within the Mexico / Argentina time zone
  • A fast-moving product-led team, backed by top European VCs
  • The chance to build core systems that shape how millions of students learn
  • A culture of ownership, curiosity, and continuous learning

    • About Luca

    Founded in Portugal, Luca is the fastest-growing edtech company in Mexico — and one of the top early-stage startups in Latin America.

    We’re building the AI-native education company of the future : combining great content, intuitive software, and the power of AI to reshape how students learn.

    Already serving over 20,000 students in under 18 months , we've earned recognition from global leaders in edtech :

    GSV Cup – Top 3 Global EdTech Startups

    HolonIQ – Top 100 LatAm EdTechs

    If you want to build meaningful, high-impact technology with a world-class team — join us .

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    Back End Developer • Portugal, Portugal