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Founding Fullstack Engineer @Verso (backed by Hexa)

Hexa

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Software Engineering

Paris, France

Posted on Mar 21, 2026

Verso is building the Consumer Intelligence OS.

We replace traditional qualitative research agencies with an AI-native platform that conducts, analyzes, and compounds consumer conversations at scale. Instead of one-off studies, companies get a continuous, structured understanding of their customers.

Our ambition is to make consumer insight a real-time, always-on system embedded in every product and marketing decision.

We’re starting with AI-moderated interviews — but this is just the entry point. The long-term product is a system of record for consumer understanding, powered by agentic workflows.

Backed by Hexa (eFounders), behind Aircall, Front, Spendesk, Yousign and 50+ others.

Verso is founded by an experienced team with a strong track record in strategy, technology, and company building.

Lydia - CEO: HEC graduate, 7 years at BCG (Principal), expert in strategy, innovation, and consumer goods

Camille - CTO: Dual degree X/HEC, former lead at CO2 AI, expert in AI and scalable product development

The role

You will join Verso as a Founding Engineer to own systems end-to-end → from infrastructure to product, with no strict boundaries — and help define engineering standards, observability, and the foundations of the team.

You will design and scale a coherent AI system end-to-end, at the intersection of agents, data, and product:

An AI interviewer interacting with users at scale (voice & video), sustaining long-form conversations with high reliability
Agent systems (state, memory, evaluation loops) orchestrating complex interactions
Real-time and async pipelines transforming multimodal data (video, audio, text) into structured, actionable insights
A client platform to explore these insights through an AI-native interface
Data systems to structure, query, and reuse qualitative knowledge at scale
Optimization of latency, cost, and performance across LLM, TTS, STT
Reliability of long-running AI workflows in production

What makes this role unique

You will build production-grade AI systems, not prototypes
You will work on long-form, high-stakes interactions, not short prompts
You will design systems where AI quality is as critical as system reliability
You will operate at the intersection of AI, data, infrastructure, and product

Current stack

Frontend: TypeScript, React, Tailwind, shadcn
Backend: Python, FastAPI, SQLAlchemy
Infra: Vercel, Railway, Supabase → AWS
AI: LLM orchestration, STT/TTS pipelines, eval systems (rapidly evolving)

Note: no need to necessarily master Python and Typescript, your coding agents do 😉

What we’re looking for

You want to build production-grade AI systems on messy, real-world data — not demos
You’re comfortable owning systems end-to-end, from architecture to production
You have experience with complex systems (real-time, data pipelines, or LLM-based products)
You have strong intuition for trade-offs (latency, cost, quality, reliability)
You’re motivated by building an ambitious, category-defining company with long-term ownership - not just execution.

Why join

Category-defining shift: we’re not improving research workflows — we’re turning consumer understanding into a continuous system
Hard technical problems: production AI systems over rich, unstructured data (audio, video, text, structured), spanning both a B2C product (low latency, high scale, responsiveness) and a B2B platform (enterprise-grade reliability, security, and data integrity).
Full ownership: you’ll own architecture, product, and execution from day one, with direct impact on the company trajectory.
Meaningful equity: early-stage package with strong upside, aligned with long-term value creation (next fundraise in the coming months).
Hexa environment: operate within a top-tier startup studio, with access to talent, resources, and a strong builder ecosystem.

Verso is committed to creating a diverse environment. All qualified applicants will receive consideration for employment irrespective of gender, origin, identity, background, and sexual orientation.

We know there’s a long way to go regarding diversity in our industry, which is why we encourage all applicants - especially those listed above - to apply to our open positions.