Back End Developer

hace 3 días

Buenos Aires, Buenos Aires C.F., Argentina SmallGiants A tiempo completo

About SmallGiants

SmallGiants is an award-winning digital marketing agency and product studio working at the intersection of
brand, growth, and AI
.

We help ambitious companies scale by combining strategy, design, and performance marketing and we're now building
AI-powered marketing platforms
that redefine how modern marketing teams operate. Our work spans early-stage startups through to global enterprises, with a strong focus on experimentation, measurable impact, and high-quality execution.

If you enjoy building robust systems that power real-world products, and want to be part of a team shaping the future of AI-driven marketing, this role is for you.

The Role

We're looking for a
Senior Backend Developer
to design, build, and maintain scalable backend services that power our internal platforms and client-facing AI products.

You'll be responsible for building clean, reliable APIs, shaping backend architecture, and ensuring performance, security, and maintainability at scale. This is a hands-on role with real ownership and influence over technical direction.

What You'll Do

  • Design and build
    RESTful APIs
    using
    Fastify and TypeScript
  • Apply Test-Driven Development (TDD)
    to deliver reliable, well-tested systems
  • Design and integrate data models using
    Supabase (Postgres, Auth, Storage)
  • Build scalable, production-ready services deployed on AWS
  • Write clean, maintainable, and well-documented code
  • Collaborate on system design, performance optimisation, and security best practices
  • Work closely with product, frontend, and AI teams to deliver end-to-end solutions

What We're Looking For

Required

  • Strong experience with
    TypeScript and
  • Proven experience building APIs with Fastify
    (or similar frameworks)
  • Solid understanding of
    TDD and automated testing
  • Experience with AWS
    and containerised environments (
    Docker
    )
  • Hands-on experience with
    Supabase
    or Postgres-based backends
  • Comfortable working with
    Git
    and CI/CD pipelines

Nice to Have

  • Experience with
    OpenAPI / Swagger
    documentation
  • Strong SQL skills and database optimisation experience
  • Familiarity with
    AI agents
    , LLM integrations, or AI-enabled systems
  • Experience with
    serverless architectures
    and
    Infrastructure as Code
    (e.g. Terraform)

Why Join SmallGiants?

  • Work on
    AI-powered products
    , not just client projects
  • High ownership and influence over technical decisions
  • Small, senior team with high standards and low bureaucracy
  • Real-world impact, systems you build will be used daily
  • Flexible working and a culture that values clarity, quality, and curiosity

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