Senior Full Stack Engineer

DaCodes

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Location: Argentina
Job Type: full-time
Work Format: 🌍 Remote Worldwide
Salary: Not specified
Posted: September 16, 2026

Job Description

Work at DaCodes!

We are a high-impact software development and digital transformation firm.

For 10 years, we have created technology- and innovation-driven solutions thanks to our team of nearly 300 talented #DaCoders, including developers, architects, UX/UI designers, PMs, QA testers, and more. Our team collaborates on projects with clients across LATAM and the United States, delivering outstanding results.

At DaCodes, you will have the opportunity to accelerate your professional growth, work on diverse projects across different industries, and contribute to the design, implementation, and optimization of cloud infrastructures.

Our DaCoders have a significant impact on the success of our business and our clients. You will be the expert participating in our projects and will have access to disruptive startups and global brands.

Interested?

We are looking for a Senior Full Stack Engineer to join the development and evolution of a web platform, working hands-on across both frontend and backend.

The immediate focus of this role is full stack web development, primarily using TypeScript, React, Express, PostgreSQL, and AWS within a Docker-containerized three-tier architecture.

We are looking for an experienced engineer who has built end-to-end web applications and can work autonomously, solve technical problems across different layers of the application, and contribute to implementation and architecture decisions when needed.

In the future, the product is expected to incorporate capabilities related to Web3/Blockchain and, later, Artificial Intelligence integrations. Experience or interest in these areas is valued but not required for this position.

Requirements

Key Responsibilities

Design, develop, and maintain full stack features using TypeScript.
Build frontend interfaces and reusable components with React.
Develop and maintain backend services and APIs using Node.js and Express.
Work with PostgreSQL for data persistence, queries, and data management.
Contribute to the development and maintenance of a three-tier application architecture.
Work with containerized applications using Docker.
Develop and operate solutions within an AWS environment.
Identify and troubleshoot issues across frontend, backend, database, and application integrations.
Participate in technical discussions and contribute to software architecture decisions when required.
Collaborate with the team responsible for CI/CD and infrastructure, contributing to troubleshooting and improvements when needed.
Conduct code reviews and promote development best practices, code quality, and maintainability.
Collaborate effectively with a distributed team across Mexico and the United States.

Required Qualifications

5+ years of professional software development experience.
Strong experience as a Full Stack Engineer, with hands-on involvement in both frontend and backend development.
Strong practical experience with JavaScript and TypeScript.
Solid experience building modern web applications with React.
Experience developing backend services and APIs with Node.js, ideally using Express.
Experience working with relational databases, particularly PostgreSQL.
Hands-on experience with applications or services deployed on AWS.
Practical experience with Docker and containerized applications.
Ability to work autonomously and troubleshoot problems across different layers of an application.
Strong problem-solving skills and ability to take ownership of technical challenges.
Advanced English proficiency, both spoken and written, required to collaborate effectively with stakeholders and team members in the United States.

Nice to Have

Experience with Drizzle ORM or other ORMs within the TypeScript ecosystem.
Experience with Tailwind CSS and/or Radix UI.
Practical knowledge of CI/CD, deployments, and pipeline troubleshooting.
Experience contributing to software architecture and technical design decisions.
Experience with Redis.
Knowledge or previous experience with Web3, Blockchain, or Solana.
Exposure to AI-powered integrations or solutions.

What We Are Looking For

Beyond the technology stack, we are looking for a hands-on, cross-functional engineer who understands how the different layers of an application interact and can take ownership of features from implementation through successful integration.

You do not need to be a DevOps, architecture, Blockchain, or AI specialist. The primary value of this role lies in having a strong Full Stack engineering foundation, while these additional areas represent opportunities to contribute as the product and technical ecosystem evolve.

Benefits

🚀 Integration with global brands and disruptive startups.
🏡 Remote work/Home office.
📍 If a hybrid or on-site work arrangement is required, you will be informed from the first session.
⏳ Schedule adjusted to the assigned work cell/project.
📅 Monday through Friday work schedule.
🎉 Day off on your birthday.
🏥 Major medical expenses insurance (applies to Mexico).
🛡️ Life insurance (applies to Mexico).
🌎 Multicultural work teams.
🎓 Access to courses and certifications.
📢 Meetups with special guests from the IT industry.
📡 Virtual integration events and interest groups.
📢 English classes.
🏆 Opportunities across our different business lines.
🏅 Proudly certified as a Great Place to Work.

🎯 Who is this job for?

This position is suitable for a Senior Full Stack Engineer with 5+ years of professional experience building and maintaining end-to-end web applications.

The candidate should have strong skills in TypeScript, JavaScript, React, Node.js, Express, PostgreSQL, AWS, Docker, troubleshooting, code reviews, and advanced English communication.

They should be familiar with owning features across frontend, backend, databases, APIs, integrations, three-tier architectures, deployments, CI/CD collaboration, and technical design decisions; Web3, blockchain, AI, Redis, and ORMs are advantageous but optional.

💬 Potential Interview Questions

How would you design a three-tier web application using React, Express, PostgreSQL, and Docker?

I would separate the presentation, application/API, and data layers, defining clear contracts between them. Each service would run in appropriate Docker containers, with environment-based configuration, health checks, and secure connectivity to PostgreSQL.

How do you structure a scalable React application written in TypeScript?

I organize the application by features or domains, use strongly typed components and API models, and keep presentation, state management, and data-fetching concerns separated. Reusable components, consistent hooks, and clear error and loading states improve maintainability.

What practices do you follow when building APIs with Node.js and Express?

I use layered architecture with routes, controllers, services, and data-access modules, combined with request validation, centralized error handling, structured logging, and consistent HTTP responses. I also apply authentication, authorization, rate limiting, and security middleware where appropriate.

How would you optimize a slow PostgreSQL query?

I would inspect the query plan using EXPLAIN ANALYZE, review joins and filters, and verify that appropriate indexes exist. I would also consider reducing selected columns, improving pagination, avoiding unnecessary N+1 queries, and checking database statistics or schema design.

How do you manage database schema changes in a TypeScript application?

I use versioned, reversible migrations managed through an ORM or migration tool, and run them consistently across development, staging, and production. Changes should be backward-compatible when deployed incrementally and tested against representative data.

What are the main considerations when containerizing a full stack application with Docker?

I use multi-stage builds, minimal base images, non-root users, and separate containers for application components when appropriate. Configuration and secrets should be injected through the environment, while health checks, resource limits, logging, and reproducible builds support reliable operation.

How would you deploy and operate this application on AWS?

I would select services based on the requirements, such as ECS or EKS for containers, RDS for PostgreSQL, and S3 or CloudFront for static assets. I would also configure IAM with least privilege, networking, monitoring, centralized logs, backups, and automated deployments.

How do you troubleshoot an issue that could originate in the frontend, backend, or database?

I first reproduce the problem and trace the request through browser tools, API logs, application metrics, and database performance data. Correlation IDs, structured logging, clear layer boundaries, and validating assumptions at each interface help isolate the root cause efficiently.

What would you include in a CI/CD pipeline for this stack?

The pipeline should install dependencies deterministically, run linting, type checking, unit and integration tests, build Docker images, scan dependencies and images, and deploy to controlled environments. It should support migrations, environment-specific configuration, rollback strategies, and post-deployment health checks.

How would you design an application that may later integrate Web3 or AI capabilities?

I would isolate external integrations behind well-defined service interfaces so the core domain is not tightly coupled to a specific blockchain provider or AI vendor. Asynchronous processing, secure key management, observability, validation, and graceful fallback behavior would be important for reliable integrations.

📋 Job Summary

DaCodes is a high-impact software development and digital transformation firm seeking a Senior Full Stack Engineer to build and evolve web platforms for global brands and innovative startups. You’ll develop end-to-end features, APIs, reusable interfaces, database solutions, and cloud deployments while troubleshooting across the application and contributing to architecture decisions. The stack includes TypeScript, React, Node.js, Express, PostgreSQL, Docker, and AWS, with future opportunities involving Web3 and AI; the role is fully remote, Monday through Friday, with project-adjusted hours. Salary is not specified, but the position offers professional growth, international collaboration, training and certifications, English classes, and impactful work across diverse industries.