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Forward Deployed Engineer（フォワードデプロイドエンジニア） ／ ソリューションエンジニア・カスタマーエンジニア

Telnyx· Sales
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Hybrid (Tokyo)full-timePosted 1mo ago

About the role

Tokyo-based Forward Deployed Engineer (FDE) as part of a local Enterprise Sales Pod to architect and deploy production systems on Telnyx’s global network for enterprise customers. Collaborates closely with an Enterprise AE to convert opportunities into production workloads (voice, messaging, AI, wireless) rather than demos, owning the technical discovery, architecture, POC, and production go-live.

Responsibilities

  • Embed with enterprise customers to understand their communications workflows, AI use cases, and integration challenges firsthand
  • Build and deploy custom implementations: AI Voice Assistants, Telnyx APIs (Voice, Messaging, Fax, Wireless), WebRTC
  • Run open-weight LLMs in customer environments via Telnyx Inference or deploy self-hosted stacks behind own serving engine
  • Deploy and operate LiteLLM as the model gateway across self-hosted and hosted providers
  • Instrument and govern LLM usage through the gateway (cost tracking, caching, logging/observability, guardrails)
  • Wire production observability (metrics, logs, traces, dashboards, alerting)
  • Design model routing strategies for real-time voice workloads with latency/cost/quality balance
  • Make build-vs-buy decisions for self-hosted vs hosted frontier APIs; ensure portable customer code
  • Adapt models to customer domains (Japanese/English, APAC regulatory contexts)
  • Lead POCs, pilots, and production launches from whiteboard to go-live
  • Own customer outcomes until solution is live and stable
  • Collaborate with Product and Engineering to influence roadmaps with field insights (Japan/APAC)
  • Create technical documentation, runbooks, and maintainable handoff solutions
  • Troubleshoot and resolve complex integration issues with customer teams

Qualifications

  • Business-level Japanese and professional working proficiency in English
  • CS degree or equivalent experience
  • 3+ years building and shipping production software
  • Proficiency in Python, Node.js/TypeScript, Go (Telnyx Edge Compute uses TypeScript)
  • Practical understanding of production model breakages (rate limits, timeouts, streaming, cost attribution, concurrency failures)
  • Comfort deploying containerized services on Kubernetes (secrets, config, upgrades)
  • Experience with observability tools (Prometheus+Grafana, OpenTelemetry, Graylog/ELK) and paged on incidents
  • High-concurrency experience with Kafka or similar
  • API design and implementation (OpenAPI, REST/GraphQL, auth, rate limiting, versioning, idempotency)
  • Event-driven/cloud-native mindset
  • Experience with SIP/WebRTC/real-time voice or messaging systems
  • Self-sufficient, able to work without a dedicated engineering team
  • Customer-facing engineering experience (discovery with customer engineers, executive presentations)
  • Ability to translate issues into root causes
  • Willingness to work onsite with travel in Japan/APAC and hybrid work setup
  • Eligible to work in Japan or sponsorship eligible

Skills

Required:Japanese languageEnglish languagePythonNode.js / TypeScriptGoKubernetesOpenAPI / API designObservability toolsDistributed systems / high concurrency
Nice to have:SIP/WebRTC

Benefits

  • Competitive salary
  • Hybrid/onsite flexibility in Tokyo
  • Health insurance and employee福利
  • Career growth in a fast-growing AI and communications platform
  • Opportunity to shape APAC roadmap and customer outcomes
Last updated Oct 22, 2026. Interested? Apply on the company site.
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About Telnyx

Telnyx owns the full stack from carrier network to AI inference, so there's nothing between your agent and the person on the other end. No handoffs. No lag. Just voice, messaging, and AI that keeps up.

Carrier-owned global communications platform for voice AI agents, SIP trunking, programmable voice, SMS/MMS, and AI inference. Single vendor for the full voice-AI stack on a Tier-1 network across 40+ countries.

Cloud communicationsGlobal eSIMMessagingPhone number APIPrivate networkProgrammable SMSSIP trunkingVoIP
Company profileWebsite

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