Full-Stack Engineer (Backend-Heavy)
Type of Employment : Full-Time
Company : Puzzle
Location : Remote (LATAM only)
About the Role
We are seeking a Full-Stack Engineer with strong backend expertise to join a team supporting a rapidly growing voice AI company. You will build internal tools that help operations scale and also contribute to technical customer deployments - connecting our AI systems with real business environments.
This is not a pure coding role - you will collaborate with internal stakeholders and sometimes with end-customers to understand needs, propose technical solutions, and ship working software quickly. What You Will Do
Internal Tools & Infrastructure
- Build internal tools and dashboards to increase team efficiency
- Collaborate with forward-deployed engineers to translate pain points into software
- Create lightweight UIs (React) only when needed for internal-facing tools
- Integrate systems and services to streamline workflows
Customer-Facing Technical Work
Participate in customer deployments of AI voice solutionsBuild and maintain backend integrations (APIs, webhooks, authentication flows, data handoffs)Troubleshoot and solve production issues in collaboration with customer-facing engineersScope and implement technical solutions.Full-Stack Engineering
Backend development using Node.jsFrontend with React / Next.js when needed (20 30% of time)Write clean, maintainable, and well-documented codeApply security and performance best practicesAI-Tooling Integration
Use AI coding assistants (Cursor, Claude, Copilot, etc.) in your development workflowCombine traditional development with AI-accelerated deliveryRequired Skills & Experience
5+ years of software engineering experienceStrong backend development with Node.jsExperience building internal tools for service / operations environmentsComfortable working directly with internal stakeholders and end-customersProven ability to self-scope and deliver without step-by-step ticketsStrong problem-solving and debugging skillsEnglish fluency (written & spoken)Nice to Have
Experience with Twilio or voice / telephony APIsFamiliarity with AI platforms or conversational AIStartup or consulting / service company experienceExperience with real-time or event-driven architecturesWhat This Role Is Not
Not a pure coding / ticket role - expectation of initiative & discoveryNot maintenance work - building new systems & integrationsNot slow-paced or heavily guided - ambiguity and speed are part of the jobJoin Us and Enjoy These Perks!
Competitive Salary : Earn a USD salary that matches your skills and experience.Paid Time Off : We value work-life balance, offering paid time off so you can recharge.Health Insurance Subsidy : Your health matters, and we help with a subsidy to cover your care.Salary Reviews every year!Paid Training and CertificationsReady to put your puzzle-solving skills to the test? Join our team today!
Want to learn more about us?
LinkedIn : Puzzle
Instagram : @puzzle.tech_
