Jr. Software Engineer - MX

Platform Engineer (Back-End, Node.js)

Neumo — Remote - Mexico

About Neumo

Neumo builds the software that runs local government: records, tax and licensing, courts, DMV, and payments. We serve communities across the country, and our platform is the shared foundation every Neumo product is built on. Build something here and it ships to dozens of applications and the governments and citizens who depend on them.

About the role

We're hiring back-end engineers for our Platform team. Platform builds the shared services every Neumo application consumes: reporting, payments, search, authentication, messaging, file handling, and more. Our guiding principle is build once, use everywhere. When three products need the same capability, Platform owns it.

This is not single-product work. You'll design services that have to be reliable, secure, and multi-tenant from day one, because they're used by many applications at once. On any given day you might architect a new service, refactor an existing one to scale, instrument it for production, or pair with a product team to turn their requirements into a clean platform API.

We move fast, we own what we ship, and we use modern tools (including AI) aggressively to do it.

What you'll do

• Architect, build, and operate shared back-end services in Node.js that are consumed across Neumo's product portfolio.
• Design for multi-tenancy from the start: tenant isolation, data separation, and per-tenant configuration are core to everything we build.
• Build event-driven, serverless systems on AWS (Lambda, EventBridge, SQS/SNS, S3, RDS, Redshift).
• Own your services in production: monitoring, tracing, alerting, and incident response, not just the first deploy.
• Write and maintain automated tests across unit, integration, and regression layers, and keep coverage high.
• Treat security as part of the definition of done: dependency and vulnerability remediation, secrets management, and compliance on sensitive paths like payments.
• Use AI coding tools (Claude Code, Cursor) as part of your daily workflow, and review AI-generated code with the same rigor you'd apply to your own.
• Participate in design reviews and code reviews, and share what you learn so the whole team levels up.
• Partner with product and design to translate end-user requirements into pragmatic, scalable technical solutions.

What we're looking for

• 4+ years of back-end engineering experience, including production-grade, scalable systems in Node.js.
• Strong experience designing and building RESTful APIs and microservices.
• Solid experience with relational databases (we use PostgreSQL).
• Hands-on experience with cloud infrastructure, ideally AWS, and comfort with serverless and event-driven patterns.
• Experience with automated testing and a real commitment to code quality.
• Excellent written and verbal communication. Much of our team is distributed, so clear async communication matters.
• Highly motivated, self-guiding, and a constant learner who still loves contributing to team design and discussion.
• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience.

Bonus points for

• Experience building multi-tenant SaaS platforms.
• Experience with AWS serverless specifically (Lambda, EventBridge, Cognito, OpenSearch) and infrastructure as code (SAM, CloudFormation, or similar).
• Experience with message-based and event-driven architectures.
• Experience integrating or building payments systems, and familiarity with PCI compliance.
• Experience working with AI-assisted development tools in a production codebase.

How we work

We build reliable, fast, shared software that the whole company depends on. We bias toward action, we own our work end to end, and we hold ourselves to being a model for the rest of the engineering org. We're remote-first, we work in two-week sprints, and we expect engineers to grow into broader ownership and leadership over time.