Senior Fullstack Developer

Job Title: Senior Full Stack Developer Location: Remote – Latin America Type of Contract: Full-Time | Remote | Contractor Salary Range: Market Rates Language Requirements: Strong written and verbal English communication skills We are seeking a skilled Senior Full Stack Developer with experience in real-time systems, multi-service architectures, and modern web technologies to join our growing team. You will play a key role in strengthening and expanding a high-volume communications platform that supports thousands of inbound and outbound calls daily. Your work will directly impact operational efficiency, platform reliability, AI-driven automation, and business performance across live production systems. Key Responsibilities Quickly ramp up within an existing multi-service production platform and contribute across multiple repositories and services Investigate, troubleshoot, and resolve production issues spanning frontend applications, backend services, telephony systems, databases, and infrastructure Build and improve systems supporting real-time call flows, lead routing, buyer matching, and dispatch operations Develop scalable backend services and APIs using Node.js, TypeScript, NestJS, Python, and FastAPI Build and enhance internal operational interfaces using Vue 3, TypeScript, React, and Next.js Architect and integrate AI-powered capabilities including transcription, summarization, automated dialing decisions, and workflow automation Contribute to technical architecture decisions while improving engineering standards, observability, maintainability, and system reliability Must-Have Qualifications 5+ years of professional experience as a Full Stack Software Engineer working in production environments Strong expertise in Node.js and TypeScript with the ability to work across Python and PHP services as needed Strong frontend development experience with Vue 3 or extensive experience in modern frontend frameworks with the ability to quickly adapt to Vue-based applications Proven experience working within complex, existing production systems and multi-service architectures Hands-on experience debugging full-stack issues across frontend, backend, databases, infrastructure, and real-time systems Experience with MySQL, Redis, Postgres, AWS, and modern observability tools such as Grafana, CloudWatch, or Sentry Strong ownership mindset with the ability to operate independently in a fast-paced, high-impact environment Preferred Qualifications Experience with telephony platforms, VoIP, SIP, Twilio, or CPaaS providers Familiarity with WebRTC, Socket.IO, browser-based softphones, and real-time event-driven systems Experience integrating LLMs and AI workflows into commercial production applications Knowledge of LangChain, LlamaIndex, Pipecat, vector databases, or embedding pipelines Experience with real-time audio streaming and WebSocket-based AI processing Background working in polyglot environments combining JavaScript/TypeScript, Python, and PHP Experience modernizing legacy systems while continuing to deliver new product functionality