Senior Node.js Backend Engineer (APIs & Integrations)-English Required

At DaCodes, we build high-impact software solutions for startups and global companies across LATAM and the U.S. We work with senior teams who value ownership, technical excellence, and high-quality engineering standards.

We are looking for a Senior Backend Engineer with a strong focus on integrations, capable of designing, implementing, and maintaining robust, scalable, and secure backend systems, primarily using Node.js, APIs, and event-driven architectures.

This is not a low-code configuration role. It requires deep understanding of backend engineering, protocols, concurrency, and security.

• Design and implement backend integrations between SaaS platforms, ERPs, and internal services.
• Design and maintain secure, versioned, and resilient REST APIs for external integrations.
• Design and implement event-driven patterns (webhooks, retries, idempotency, duplicate handling, and eventual consistency).
• Design and implement authentication and authorization flows:
• OAuth2 (authorization flows)
• JWT (token format & validation)
• API Keys, HMAC
• Analyze concurrency, performance, and scalability issues in Node.js.
• Implement observability strategies (structured logging, monitoring, and robust error handling in production).
• Evaluate architectural trade-offs in integration, security, and data consistency scenarios.
• Be responsible for the stability and reliability of production integrations.

• 4+ years developing backend systems in production, with experience in integrations and distributed architectures.
• Advanced Node.js (event loop, async I/O, blocking vs. non-blocking).
• Strong understanding of HTTP at the protocol level.

Hands-on experience with:

• OAuth2 (authorization code / client credentials)
• JWT (not as “magic” auth)
• Webhooks (idempotency, retries, deduplication)
• Experience resolving real incidents and production issues.
• Advanced English (communication with US clients).

• Experience with iPaaS (Mulesoft, Workato, Boomi, etc.).
• ERP integrations (NetSuite, SAP, Business Central).
• Knowledge of CI/CD.
• Experience in high-concurrency environments.

🚀 Work with global brands and disruptive startups.
🏡 Remote work / Home office.
📍 If a hybrid or on-site model is required, you will be informed from the first session.
⏳ Work schedule aligned with the assigned project/team.
📅 Monday to Friday schedule.
⚖️ Legal benefits (Applicable for Mexico).
🎉 Day off on your birthday.
🏥 Private health insurance (Applicable for Mexico).
🛡️ Life insurance (Applicable for Mexico).
🌎 Multicultural teams.
🎓 Access to courses and certifications.
📢 Meetups with industry experts and top universities.
📡 Virtual networking events and interest groups.
📢 English classes.
🏆 Opportunities within our different business lines.
🏅 Proudly certified as a Great Place to Work.