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Senior BackEnd Developer

Senior BackEnd Developer

Sintesys North America - ServiceNow and NearShore SpecialistsMexico
Hace 3 días
Descripción del trabajo

Direct message the job poster from Sintesys North America - ServiceNow and NearShore Specialists

Client Engagement Specialist & TA at Sintesys | Psychologist

Location : Remote

Duration : 6-12-month contract

Musta have : Node.js / Nest.js, Golang, .NET Core.

Job Description :

We are looking for a backend engineer who can fully own the backend architecture of our platform; from the API layer to database modeling and cloud deployment. You will be responsible for maintaining and evolving all backend services and cloud infrastructure, including replacing the current limited .NET Core implementation with a modern, maintainable stack.

Currently, we expose a few REST endpoints, but over time we plan to introduce a GraphQL API layer, which you will help design and implement.

This is a hands-on, solo contributor role to start. We're looking to build a flexible, modern backend stack; ideally using Node.js (TypeScript) or Golang. You will work closely with a dedicated frontend team and report directly to the technical leadership.

Responsibilities

  • Migrate existing REST API endpoints from .NET Core to Node.js (NestJS) or Golang backend microservices
  • Architect modular, scalable backend services using clean architecture or domain-driven design principles
  • Implement backend APIs that power a multi-tenant SaaS product, including :
  • Multi-tenant logic for data isolation, scoped permissions, and tenant-aware behaviors
  • Authentication and authorization middleware
  • Role-based access control for 3 system roles
  • Design and implement a GraphQL API layer (schema-first, data loaders, modular resolvers)
  • Implement observability patterns (structured logging, tracing, error monitoring) using tools like OpenTelemetry, Sentry, etc.
  • Manage the KrakenD API Gateway, including :
  • Creating and updating route configurations
  • Integrating new services via request transformation
  • Build and publish Docker containers to AWS ECR; deploy to ECS (Fargate or EC2)
  • Configure and maintain GitHub Actions for CI / CD pipelines
  • Design and manage cloud infrastructure networking :
  • Application Load Balancer (ALB) setup
  • Private networking for service-to-service communication
  • Planning for future service mesh adoption
  • Design and evolve PostgreSQL database schemas
  • Manage schema changes using code-based migration tools (not GUI tools)
  • Collaborate with frontend and platform engineers to ensure seamless integration

Qualifications

  • 5+ years of backend development experience with strong architectural decision-making
  • Proficient in TypeScript / Node.js (NestJS preferred) or Golang
  • Strong knowledge of GraphQL, including :
  • Resolver architecture
  • DataLoader patterns and performance tuning
  • Deep experience building and maintaining REST APIs
  • Hands-on experience with :
  • AWS services : ECR, ECS, ALB, and VPC networking
  • Docker and container orchestration
  • GitHub Actions CI / CD automation
  • Fluent in PostgreSQL : schema design, indexing, migrations, and tuning
  • Familiar with secure service-to-service networking and early-stage service mesh planning
  • Comfortable working independently and proactively in a distributed team environment
  • Clear communicator, highly accountable, and detail-oriented
  • Seniority level

    Seniority level

    Mid-Senior level

    Employment type

    Employment type

    Full-time

    Job function

    Industries

    IT Services and IT Consulting

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    Backend Developer • Mexico