About the Role:

As a Senior Software Engineer based in Mexico, you will play a pivotal role in designing, developing, and delivering high-quality software solutions on a small team designing and implementing new features for two new products (< 2 years old). You will be expected to handle both frontend and backend development.

Minimum Qualifications:

* Strong Node.js/JavaScript — everything is Node (20/24). Notably must be comfortable with both module systems.
* AWS serverless architecture — Lambda, SQS, S3, Secrets Manager, DynamoDB API Gateway. Both APIs are built on Serverless Framework v4 with serverless-offline for local dev.
* PostgreSQL with Knex + Objection.js — both products use this exact ORM stack. Comfort writing and rolling back migrations is a real day-to-day skill here.
* React + Next.js 14 —Solid React with Next.js fundamentals with form-heavy, table-heavy CRUD UI experience.
* Comfort working within an internal design system — including debugging CSS specificity/source-order issues rather than reaching for a rewrite.
* Fluency in English and Spanish,



both written and spoken.

Preferred Qualifications:

* SOAP and XML processing — Both products interface with existing internal and third-party systems using SOAP interfaces with XML.
* Document and image handling — TIFF/PNG processing, PDF generation.
* Express —both inside Lambda (via serverless-express) and on EC2 (the SOAP/PRIA service).
* Jest for unit and integration; Cypress for the UI.
* Experience working in an Agile/Scrum development environment.
* Experience using AI coding tools

Responsibilities:

* Develop new features handling both the front end and back end development work.
* Collaborate with product managers, designers, and other engineers to define technical requirements and deliverables.
* Conduct code reviews and ensure adherence to coding standards, quality, and security guidelines.
* Collaborate on architectural decisions to align with long-term business goals.
* Stay current w

📌 Senior Software Engineer (Guadalajara)
🏢 Neumo Holdings
📍 Guadalajara