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Junior Fullstack Engineer at AethexAI Inc

Join AethexAI Inc, a pre-seed voice AI startup building critical infrastructure for emerging markets across Africa and the Middle East. As a Junior Fullstack Engineer, you’ll work directly with proprietary speech models and scale production systems alongside founders Ayooluwa Odemuyiwa and Mariama Diallo. This is your breakout opportunity to handle high-impact API integrations and platform fixes for enterprise clients while earning early-stage equity in a fast-growing London-based team.

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AethexAI Inc

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Location

London, United Kingdom

Compensation

£35k-£50k + Equity

Company

AethexAI Inc

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Role overview

You will join AethexAI Inc as a Junior Fullstack Engineer supporting the Forward Deployed Engineering team. In this high-impact role, you’ll manage one-off integrations, platform fixes, and custom builds for enterprise clients. Working across Python, AWS, and Kubernetes, you will enable the deployment of large-scale voice infrastructure globally.

AethexAI Inc is an enterprise voice‑AI infrastructure company building the voice stack for emerging markets, from core speech models through to secure enterprise deployment tooling. The company designs and delivers voice agent systems that work reliably in real‑world conditions and are optimized for the linguistic and infrastructure realities of regions such as Africa and the Middle East, including support for localized dialects of English, French, Arabic and African languages. Its platform provides organizations and developers with self‑hosted and hybrid (on‑device and cloud) speech technology that meets stringent privacy, compliance and latency requirements in regulated sectors like finance, healthcare, telecommunications and customer service. By combining small, market‑localized speech models with an orchestration layer tailored to low‑bandwidth and high‑latency environments, AethexAI enables enterprises to deploy human‑sounding, low‑latency voice agents and automation solutions that reduce costs while expanding access to digital services across emerging markets.

What you will do

  • Build and maintain custom integrations and API fixes that allow enterprise clients to seamlessly use the AethexAI developer platform.
  • Support the Forward Deployed Engineering team by executing fullstack technical fixes across frontend and backend production systems.
  • Contribute to the development of SDKs and developer tools using a modern tech stack including Python, AWS, and Kubernetes.

Who this is a fit for

  • Has at least one internship or professional engineering role under their belt with a proven record of shipping code.
  • Demonstrates proficiency working across the full stack and is comfortable integrating various third-party and internal APIs.
  • Exhibits a high-energy, “hungry” mindset with the speed and adaptability required to thrive in an early-stage startup environment.

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Why this role is remarkable

  • Work on cutting-edge voice AI processing thousands of calls daily across Africa and the Middle East using proprietary speech models.
  • Gain massive ownership as one of the first 10 employees at a pre-seed startup backed by experienced founders.
  • Access a genuine breakout opportunity with early-stage equity and the chance to solve complex engineering challenges for global enterprise clients.

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If your profile’s a match and AethexAI Inc wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.

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