[Hiring] Senior Backend Integration Engineer @DaCodes

Role Description

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.

Why this role is interesting:

• Work on complex backend systems and real-world integrations (SaaS, APIs, ERPs)
• Solve challenges around scalability, reliability, and distributed systems
• Collaborate with a highly senior team with strong technical ownership
• Work directly with U.S.-based clients and products with real impact

What You’ll Do:

• Design and implement robust backend integrations across multiple systems (SaaS, APIs, internal services)
• Build and maintain secure, scalable REST APIs
• Design and operate event-driven systems (webhooks, async processing, retries, idempotency)
• Implement authentication and authorization flows:
  • OAuth2 (authorization code, client credentials)
  • JWT (token validation, security considerations)
  • API Keys / HMAC when needed
• Handle real-world integration challenges:
  • duplicated events
  • out-of-order data
  • partial failures
• Debug and resolve production issues across distributed systems
• Ensure proper logging, monitoring, and error handling
• Participate in technical decision-making and trade-offs

Qualifications

• 4+ years of backend experience
• Strong experience with Node.js (deep understanding of async I/O and event loop behavior)
• Solid understanding of HTTP protocol and API design
• Proven experience designing and operating webhooks in production, including:
  • idempotency handling
  • retries and failure recovery
  • event deduplication
• Experience implementing OAuth2 flows, including:
  • authorization code
  • client credentials
  • token lifecycle and refresh tokens
• Strong understanding of JWT beyond basic usage (signing, validation, security implications)
• Experience working with production systems under real constraints

Requirements

• You should be comfortable working in environments where:
  • Systems communicate through events and asynchronous processes
  • Data may arrive duplicated, delayed, or inconsistent
  • Integrations fail and need to be retried safely
  • You are responsible for debugging real production issues across services

Nice to Have

• Experience with iPaaS platforms (Mulesoft, Workato, Boomi)
• Experience integrating with ERPs (NetSuite, SAP, Business Central)
• Experience with queues, background jobs, or messaging systems
• CI/CD experience
• Experience in high-concurrency environments

Benefits

• 🚀 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.