AI Software Engineer; senior​/level

Position: AI Software Engineer (senior/staff level)
At Joko, we help consumers shop smarter. Our mission is to revolutionize shopping, empowering people to find what they need, make informed decisions, and save money.

Founded in Paris, Joko is a tech company and certified B Corp with over 105 talents across Paris, Barcelona, and New York (and beyond). More than 6 million users already save money every day at 10,000+ merchants with Joko.

From cashback and automatic coupons to price alerts and carbon tracking, we keep expanding our products to make shopping smarter. We're now building an AI-powered shopping assistant to help users find the best products by price, quality, and environmental impact.

Having reached profitability in our core market, we're now scaling globally, with a strong focus on the US.

It's still day 1, come build the future of shopping with us!

This position is remote-friendly (France and Spain).

Our engineering team

Our Engineering team excels at solving cutting-edge technical challenges with elegant solutions. With a strong focus on product innovation and design, they are shaping the future of the online shopping experience. Their ambition is to have a positive impact on the everyday lives of hundreds of millions of users around the world.

Software Engineers in the Engineering team work hand-in-hand with the Product team, from exploration, design, and roadmap prioritization to implementation, and deployment in production. At Joko, we have firsthand experience that teams with engineers who possess a diverse range of skills, and where engineering and product collaborate closely, are able to deliver a truly delightful and innovative user experience.

The Engineering team is currently growing fast to continuously innovate on all parts of our product and tech stack and to empower the revolution of the way people shop online.

What you will do

As an AI Software Engineer, you will own the development and continuous improvement of Joko AI - our AI shopping agent that seamlessly guides users to the ideal product whatever their intent - helping them save significant time by taking into account all relevant considerations (price, quality, reviews, environmental impact), across every product sold by any e-commerce merchant in the world.

Working closely with Alex, our CTO, and alongside a small team of world-class engineers, sitting at the intersection of applied research and production.

* Agent architecture:
You will own the architecture of our agentic system - ensuring it constantly evolves, incorporates the latest advancements in the field, challenges existing assumptions, tests bold ideas, and pushes the boundaries of what our AI assistant can do.

* Evaluation & monitoring:
You will design and run robust evaluation frameworks to measure Joko AI's performance, catch regressions, and build confidence before shipping to production.

* Capabilities & integrations:
You will constantly expand the set of tools and capabilities that Joko AI can leverage - web search, vector search, ever-smarter catalog lookups - making the agent more resourceful, faster, and more reliable at scale.

* Catalog & data at scale:
Great recommendations start with great data. Joko AI is powered by a product catalog of hundreds of millions of entries, continuously updated. You will tackle the massive challenges of ingesting, standardizing, and enriching this data at scale, where AI itself plays a key role.

* Personalization:
Joko has access to uniquely rich data - bank transactions and browsing behavior through the browser extensions - giving us unparalleled insight into user preferences and shopping patterns. You will leverage these signals to deeply understand user intent and build a truly personalized experience - making Joko AI feel like it genuinely knows what you're looking for.

* Experimentation & prototyping:
You will constantly push Joko AI forward by identifying new challenges and building new features for the agent. You will prototype fast, put early versions in users' hands, and iterate based on real feedback

* Staying ahead:
You will stay on top of the latest models, agentic frameworks, and research papers, and translate what's emerging into concrete improvements for Joko AI.

* Fine-tuning & optimization:
You will fine-tune models to improve quality, reduce latency, and cut costs - always with a production-grade mindset.

* Runtime & scalability:
You will iterate on the backbone and infrastructure Joko AI runs on, ensuring it handles hundreds of thousands of daily users with zero downtime and minimal latency.

* Product collaboration:
We are inventing an entirely new shopping experience with Joko AI - and much of what the ideal UX looks like is still to be defined. You will work hand-in-hand with the Product team, exploring bold design directions, imagining what the future of AI-assisted shopping can be, and turning that vision into reality from early concept to full rollout.

Who we're looking for

* Experience:

You have 5+ years of software engineering experience, including time building and…