Responsibilities
- Lead the design and implementation of the new platform architecture - from legacy systems to modern stacks
- Build and integrate AI-powered features into the core product
- Collaborate directly with leadership on architecture decisions, technical priorities, and product roadmap
- Set code standards, review practices, and engineering culture on a small team
- Own integrations with external APIs and third‑party systems
- Maintain business continuity during migration phases - zero downtime wherever possible

Must-Haves
- Full‑stack proficiency: strong backend (Node.js, Python, or equivalent) AND frontend (React or Vue) - required
- Demonstrable experience replatforming or migrating legacy systems to modern architectures
- AI‑first workflow: regular use of AI coding tools (Copilot, Cursor, Claude, etc.) in day‑to‑day development
- REST API design, relational database design, and SQL
- Git, CI/CD pipelines, and cloud environments (AWS or Azure)
- Ability to operate with genuine ownership in a lean, low‑process team

Nice to Have




- Experience with the hospitality industry or B2B SaaS products
- Microservices or event‑driven architecture experience
- Familiarity with observability tooling: Datadog, Sentry, or equivalent
- Hands‑on experience with LLM APIs (OpenAI, Anthropic, etc.) or AI agents in production
- Technical English sufficient for documentation and corporate team communication

Who This Is NOT For Junior or early‑career developers - this role requires genuine mid‑senior depth Specialists: pure frontend engineers, pure backend engineers, or pure data engineers Candidates who haven't shipped production code recently or who rely on heavy team scaffolding Anyone who views AI coding tools as a threat rather than a multiplier
Business Unit: Avance
Scheduled Weekly Hours: 40
Number of Openings Available: 1
Worker Type: Regular
Career Site: More About Jonas Software
About Jonas Software: Jonas Software is a leading provider of enterprise management so

📌 Full Stack Developer (Ciudad de México)
🏢 Perseus Group
📍 Ciudad de México