Role Overview
The Forward Deployed Engineer role at Telnyx is a customer-facing technical position based in São Paulo, Brazil, designed for professionals who thrive at the intersection of customer success and software engineering. This job suits a technical expert who enjoys embedding directly with enterprise clients to architect, deploy, and scale communications and AI systems on the Telnyx global network.
Key Responsibilities
Embed directly with enterprise clients across Latin America to understand unique communications workflows, AI use cases, and technical integration challenges.
Build and launch custom implementations including AI voice assistants, WebRTC, and core Telnyx APIs spanning voice, messaging, fax, and wireless.
Deploy and operate open-weight large language models such as Llama, Qwen, Mistral, DeepSeek, and gpt-oss within customer-controlled cloud, on-premises, and air-gapped environments.
Configure LiteLLM as a unified model gateway in client environments, managing routing, load balancing, retries, fallbacks, rate limits, and virtual keys.
Instrument and govern LLM usage through cost tracking, budgets, caching, guardrails, and observability tools like OpenTelemetry and Langfuse.
Design real-time model routing strategies that balance latency, cost, reliability, and language quality for Spanish and Portuguese workloads.
Guide clients through build-versus-buy decisions, application code portability, and domain adaptation via prompt design, RAG pipelines, and fine-tuning.
Manage proof-of-concepts, pilots, and production launches from initial whiteboard sessions through to a stable go-live.
Collaborate closely with internal Product and Engineering teams to share market insights and help shape the product roadmap.
Author clear technical documentation and runbooks in English, Spanish, or Portuguese, while helping clients navigate regional privacy, security, and data-residency regulations like LGPD.
Requirements
Hold a Computer Science degree or possess equivalent professional experience.
Bring a minimum of 3 years of software engineering or technical consulting experience.
Demonstrate proficiency in multiple programming languages such as Python, Node.js, and Go.
Possess hands-on production experience running LiteLLM or a comparable LLM gateway like Portkey, Kong AI Gateway, or custom proxies.
Understand production gateway challenges including rate limits, streaming, token accounting, cost attribution, and concurrency failures.
Maintain comfort deploying containerized services on Kubernetes, managing secrets, configuration, and system observability.
Show strong API fluency, event-driven thinking, cloud-native instincts, and familiarity with SIP, WebRTC, VoIP, or real-time voice and messaging systems.
Display the ability to troubleshoot complex integration issues and lead high-stakes technical conversations directly with customers.
Maintain professional fluency in Spanish or Portuguese alongside professional working proficiency in English.
Reside in or near São Paulo with proper authorization to work in Brazil, and accept approximately 10% to 30% travel across the region.
Nice to Have
Professional proficiency in both Spanish and Portuguese.
Direct experience with AI voice assistants, speech-to-text, text-to-speech, or conversational AI systems tailored for Latin American Spanish or Brazilian Portuguese.
Fine-tuning and post-training background including LoRA, QQLoRA, model distillation, preference tuning, or evaluation set creation.
Familiarity with inference-serving engines behind gateways such as vLLM, SGLang, TGI, or Ollama, including GPU capacity sizing.
SQL proficiency with relational databases like PostgreSQL, MySQL, or Oracle.
ETL and data-wrangling capabilities alongside solid DevOps fundamentals in Docker, Kubernetes, and CI/CD pipelines.
Background in telecommunications, CPaaS, contact centers, or high-growth SaaS companies.
Experience designing private-cloud, sovereign-cloud, on-premises, or data-residency-sensitive architectures with a strong security mindset.
Skills and Tools
Python
SQL
Kubernetes
Docker
Node.js
Go
LLMs
RAG
LiteLLM
WebRTC
VoIP
About the Company
Telnyx is a financially stable and profitable industry leader building the future of global connectivity. The company architectures a private, global, multi-cloud IP network and delivers hyperlocal edge technology through intuitive APIs. Telnyx focuses on solving real-world problems and modernizing antiquated communication solutions while fostering an environment of continuous learning and growth for its team.
How to Apply
To submit an application for this position, please visit the official Telnyx careers page and complete the online application process.
