I will build your backend api and microservices in golang or nestjs

A
andresoms
A
andresoms
Andres O.
build your backend api and microservices in golang or nestjs
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build your backend api and microservices in golang or nestjs

About this gig

Optional: cloud deployment on AWS, Google Cloud or Azure, defined as code with Terraform.


Why me

As Tech Lead of a 20-person IT department I have designed and delivered systems that handle hundreds of thousands of orders a month with 99.95% availability. I explain trade-offs in plain language and leave you with code your team can maintain.


How it works

Share your requirements or existing repository, we agree the scope and the architecture in a short call, and I deliver in milestones with a demo at each step. Launch prices for my first Fiverr clients.Everything tested, containerized with Docker, documented with OpenAPI and shipped through CI/CD.

Data layer: PostgreSQL, Redis, migrations, performance tuning.

Microservices and event-driven systems: queues, workers, idempotency, retries, observability.

REST and GraphQL APIs with clean architecture, validation, authentication and authorization.

Backend that is designed before it is coded. I am a software architect and Tech Lead with 8+ years building backend systems in Go and TypeScript (NestJS, Node.js) for banking, insurance, retail and IoT, and I run the infrastructure they live on.


What I build

  • Expertise

    • Performance
    • Security
    • Design
    • Databases
    • Testing procedures

  • Programming language

    • TypeScript

  • Frontend framework

    • Angular
    • Next.js
    • React.js

  • Backend framework

    • Express.js
    • Fastify
    • Gin
    • NestJS
    • Node.js

Get to know Andres O.

Andres O.

Senior DevOps and Cloud Security Engineer, AWS, GCP, Azure, Kubernetes

  • FromSpain
  • Member sinceSep 2026
  • Avg. response time1 hour

  • Languages

    Spanish, English, Catalan
Senior DevOps & Cloud Security Engineer and software architect. 8+ years on AWS, Google Cloud and Azure, Tech Lead of a 20-person IT team in banking & insurance. DevOps: I automate everything between your code and production. Infrastructure as code with Terraform, Kubernetes, CI/CD pipelines and releases with no downtime. Cloud security: I lock that infrastructure down. Least-privilege access, hardening, secrets, monitoring, scanning inside the pipeline and ISO 27001 readiness. Backend: microservices in Go and TypeScript. Clear scope, documented deliverables, no surprises.

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