Senior Backend Architect (LATAM)

Wizdaa Inc.; Brasil; On-site; BRL 350,000 - 600,000; Full time

Job summary

Wizdaa Inc. in Brazil seeks a highly senior backend engineer to operate at Lead Engineer / Architect level. You will design and own backend services in NestJS and TypeScript, turning ambiguous product needs into scalable production solutions.

This AI-first, high-ownership role on a lean team requires moving fast while upholding architecture, security, performance, and reliability. You will set technical direction and ensure quality across the stack.

Qualifications

• Experience as Lead Engineer or Architect in prior roles.
• Ability to design systems with long-term scalability in mind.
• Proven track record of making architecture decisions independently.

Responsibilities

• Design and own backend services in NestJS and TypeScript, from schema to production.
• Make architecture decisions independently, focusing on scalability and maintainability.
• Build and maintain GraphQL APIs across a microservices environment.
• Own database design, optimization, and reliability in Postgres.
• Define technical direction, not just implementation details.
• Set and enforce quality standards across AI-generated and hand-written code.
• Translate ambiguous product needs into clear technical solutions.
• Contribute to system design, infrastructure decisions, testing strategy, and developer productivity.

Skills

NestJS

TypeScript

GraphQL

PostgreSQL

Architecture design

Microservices

AI integration

Code quality

System scalability

Reliability

Tools

NestJS

TypeScript

GraphQL

PostgreSQL

Job description

We are looking for a highly senior backend engineer who can operate at Lead Engineer / Architect level.

This is not a role for someone who only executes tickets. We need someone who can make architecture decisions independently, design systems with long-term scalability in mind, and turn ambiguous product needs into production-ready backend solutions.

This is a high-ownership role on a lean team. The default mode of execution is AI-first. Engineers use AI agents to accelerate research, planning, implementation, testing, and refinement, but ownership stays fully with the engineer. The person in this role must be able to use AI to move fast while maintaining strong judgment around architecture, correctness, security, performance, and reliability.

We are specifically looking for candidates who have already held responsibilities similar to Lead Engineer, or Architect in previous roles.

The work

• Design and own backend services in NestJS and TypeScript, from schema to production
• Make architecture decisions independently, with a focus on scalability, maintainability, and reliability
• Build and maintain GraphQL APIs across a microservices environment
• Own database design, optimization, and reliability in Postgres
• Define technical direction, not just implementation details
• Set and enforce quality standards across both AI-generated and manually written code
• Translate ambiguous product needs into clear technical solutions
• Contribute to system design, infrastructure decisions, testing strategy, and developer productivity
• Operate in an AI-first workflow without compromising engineering standards

This is a fast-paced environment with real production stakes. You will be expected to move quickly, think at systems level, and make strong technical decisions with minimal hand-holding. If you are comfortable owning architecture and raising the technical bar in a high-accountability environment, this role is for you.