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Prod / Eng

- Barcelona
- Hybrid

AI / Fullstack 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 that San Francisco mindset to Europe with our first hub in Barcelona , and we have the support of leading international VCs and Angels who are backing the SLNG journey.
Challenge Today, Most Speech Infrastructure Is US-centric, Unreliable, And Difficulty 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.

What do we offer?

- We pay top of market. We want to 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 insurance, gym, and more via Cobee.
- L&D;: Annual budget (up to €1000) for training, courses, or conferences.
- Remote work support: Monthly stipend (up to €50) to cover wifi or other costs.
- Great equipment: Laptop of your choice plus €500 to set up your workstation in year one, with top-ups in following years.
- Time off: Additional +5 days vacation on top of the statutory minimum.

About The Role

You’ll build the frontends that showcase SLNG — from our developer portal to real-time apps. You'll collaborate with DevRel to build demo UIs and turn infra into clean, usable experiences.

Example Initiatives

- Build the SLNG developer portal in modern frameworks (e.g. Next.js).
- Create real-time transcription + TTS dashboards.
- Integrate billing, compliance, and usage analytics.
- Build new voice experiences for our current and potential customers

Requirements

- Strong React/Next.js/Tailwind.
- Experience with APIs + streaming UX.
- Bonus: WebRTC, WebSockets.
- Fluency in English

Hiring Process (2 weeks)

- Intro call with one of the founders
- Case Study
- Panel conversation with members of the SLNG Team
- Final discussions
- Job offer

The radically global speech AI gateway for simple, universal, real-time voice.
Prod / Eng

- Barcelona
- Hybrid

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

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📌 AI / Fullstack Engineer (Barcelona)
🏢 SLNG//
📍 Barcelona