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Prod / Eng

Barcelona
Hybrid

Founding Speech Model Performance Engineer

Our mission is simple: make AI voice relevant and available for the rest of the world.

We usually respond within a day

SLNG is building the backbone for real-time speech AI, enabling developers to run voice applications anywhere in the world with local compliance and ultra-low latency.

Our founding team comes from the core of AI and developer tooling in the USA, with experience scaling platforms trusted by the world’s best builders. Meet Luke, Founder & CEO, and Ismael, Founder & CPO at SLNG.

We’re bringing the San Francisco mindset to Europe with our first hub in Barcelona, and we have the support of leading international VCs and Angel investors who are backing the SLNG journey.

Challenge → Today, Most Speech Infrastructure Is US-centric, Unreliable, And Difficult To Deploy Globally. SLNG Is Changing That By Delivering a Platform That Is

Local:



deployed close to users and compliant with regional regulations
Fast: designed for real-time voice experiences
Open: built to integrate with the tools and workflows developers already use.

From real-time transcription to voice AI applications, SLNG is creating the Voice AI gateway that will empower the next generation of speech-powered products.

As Speech Model Performance Engineer, you’ll work closely with Ismael and the founding tech team to shape the technical foundation of SLNG. From TTS voices to multilingual ASR, you’ll benchmark, optimise, and productionize speech inference at scale.

What We Offer

We pay top of the market → We want serious talent in the team, and we benchmark compensation accordingly.
Equity → All full-time, permanent roles include stock options — we want everyone to share in the upside as we build.
Hybrid by design → 3 days/week in the Barcelona office for collaboration and culture.
Versátil benefits: Health insur

📌 Founding Speech Model Performance Engineer (Barcelona)
🏢 SLNG//
📍 Barcelona