Lead Software Engineer - Applications > Paris > Joboolo FR :

We are looking forward to receiving

applications from top talents.

Kleio was recently founded to revolutionize how companies engage with customers and boost sales.


We are building Persuasive AI:


a multi-agent conversational AI capable of autonomously engaging consumers in rich conversations to capture and convert leads.


We are seeing strong traction across industries such as travel, real estate, domestic appliances, and cosmetics.


Now, we are looking for highly skilled software engineers who believe AI will redefine digital interactions.

As a Lead Software Engineer – Applications, you will play a pivotal role in developing AI-powered user-facing applications for end users, customers, partners, and internal teams.


You will design and build:

• Conversational interfaces – web-based AI chat experiences with dynamic interaction modes.


• Multichannel AI interactions – rich messaging experiences across WhatsApp, Messenger, SMS, and other platforms.


• AI cockpit dashboards – advanced tools for customers to review conversations, extract insights, manage leads, and configure AI behavior.

As an early team member, you will help shape our company culture, hire top talent, and build cutting-edge AI-driven applications.


This role is ideal for someone who thrives in a fast-paced, collaborative environment and is capable of executing precisely.

• Design and develop user-facing applications that enhance AI interactions and system configurations.


• Build integrations with third-party platforms (e.g.,
  CMS, CRM).


• Contribute to cross-team technical discussions on architecture, UI/UX, back-end development, and integrations.


• Engage directly with customers to demonstrate Kleio’s capabilities and provide technical support.


• Help grow a high-performing, diverse engineering team.

We prioritize proven, modern technologies that allow us to move fast and efficiently.


Our current stack includes:

• AI Infrastructure:
  
  
  Hosted LLM services (open & closed source LLMs)


• Databases:
  
  
  GCS, Redis, relational, vector, and graph databases

• 3+ years of professional full-stack development experience.


• Proven track record of designing and building scalable web applications.


• Strong hands-on experience with front-end frameworks; Svelte experience is a plus.


• Ability to take full ownership of projects, from concept to deployment.


• Excellent communication skills in English, with the ability to present ideas to customers and product managers.

• Interest in Generative AI and experience integrating LLM APIs.


• Degree in Computer Science, Mathematics, or a related field.


• Familiarity with Agile development methodologies.


• Experience leading engineering teams or projects.