Founding Device Fingerprinting Engineer

Role Overview Prelude is hiring a Founding Device Fingerprinting Engineer in Paris, France. This role focuses on building advanced technology that strengthens user privacy and security by applying device fingerprinting methods. What You Will Do Design and develop device fingerprinting solutions to support digital security initiatives. Work closely with a ski…

Join BeReal as a Founding Engineer and be part of a revolutionary social media movement. In this pivotal role, you will collaborate with a talented team to develop innovative features that enhance user engagement and experience. You will have the opportunity to influence product direction from the ground up and contribute to our mission of fostering authentic connections among users.

About PanoraPanora is an innovative B2B platform dedicated to developing AI-driven agents specifically for insurance brokers, operating within a highly regulated and complex industry.Our vision is to establish ourselves as the leading AI Operating System for brokers across Europe, focusing on automating repetitive tasks while enhancing compliance, advisory quality, and client relations.The product is already operational with brokerage firms in France and Belgium, featuring AI agents capable of contract comparison, coverage analysis, compliance checks, and Outlook/Word assistance.Founded by Diane - an ex-VC with a robust operational background and Fabian - a seasoned founder and product-driven AI engineer, Panora is supported by Hexa (formerly eFounders), the startup studio behind over 40 tech companies including Aircall, Spendesk, and Front. We are currently in a crucial phase of structuring and scaling our platform.At Panora, AI is not just an additional feature; it is at the heart of our product. You will engage with large language models (LLMs), agent-based systems, and production-grade AI pipelines, all while operating under real-world regulatory and reliability constraints from day one.About the RoleAs a Founding Engineer, you will be a pivotal member of the founding team, directly influencing our product and technical strategy.Your collaboration with the CTO will span the entire product lifecycle, covering architecture, development, technical decision-making, and ensuring production readiness.This role is hands-on and impactful, granting you significant ownership and the ability to shape the technical trajectory of the company.ResponsibilitiesProduct & Engineering• Design, develop, and deliver key product features encompassing AI agents, workflows, and integrations.• Take ownership of technical architecture decisions with a focus on scalability, security, and compliance.

Join Waniwani as a Founding Platform Engineer and revolutionize our infrastructure for seamless scalability.We have pioneered the first insurance application integrated with ChatGPT. Today, numerous companies are eager to leverage our platform to establish their own AI-driven storefronts. Each client requires a dedicated MCP server, a unique codebase, and tailored distribution, all functioning seamlessly and interconnected under your management.About WaniwaniWaniwani is at the forefront of creating the AI distribution framework for the $10 trillion services economy. Our platform empowers businesses to offer quote-based services such as insurance and wealth management directly within LLMs, where consumer purchasing decisions are increasingly shifting. Imagine Shopify, but tailored for services — we are constructing the foundation for AI-native commerce.We are just beginning this transformative journey. Our launch of ChatGPT insurance resulted in a staggering $26 billion in market cap losses for major brokers within just 48 hours, marking what the press has dubbed "the industry's ChatGPT moment." We refer to it as Day 1.Why This Position MattersHaving surpassed the proof of concept stage, our product is operational. We are now tasked with managing this for hundreds of clients simultaneously, each with its own MCP server, distinct data pipelines, and customized distribution dashboards, all while ensuring the platform remains robust and responsive.This role presents a systems-level engineering challenge. You will be responsible for architecting a solution that allows Waniwani to expand from dozens to thousands of deployments. This includes multi-tenant infrastructure, orchestration of multiple codebases, and real-time data flow across a multitude of interconnected services. In this role, a single flawed abstraction can cost months, whereas a well-designed one can save years.We anticipate that AI will write 95% of your code. Your expertise will not lie in typing code but in discerning what needs to be built, how to structure it, and when the AI may be misguided. You will work at a pace that integrates LLMs as a fundamental aspect of your engineering process, rather than viewing them as a novelty. The key challenge will be exercising judgment, not merely keystrokes.

Join Plato, the revolutionary platform designed specifically for litigation lawyers.As the legal industry stands on the brink of transformation through Generative AI, litigation attorneys face a multitude of challenges involving intricate damage assessments, extensive document reviews, and lengthy legal drafting processes. Our vision: To create the foremost operating system for litigation lawyers, allowing legal professionals to reduce administrative and operational work by fivefold and redirect their focus on strategic advocacy.At Plato, we currently assist a network of law firms and a major insurance legal team specializing in personal injury, equipping them to manage hundreds of active cases effectively with our innovative solutions.Founded in January 2026 by Ben (CEO) and Alexandre (CTO), we are proudly backed by Hexa, Europe's leading startup studio that has launched over 35 companies, including unicorns like Front, Aircall, and Spendesk, cumulatively generating over €230M in ARR and raising upwards of €750M in funding.Plato is already operational with real users and data, effectively addressing tangible legal workflows. We are now entering a critical phase of development and seek a dedicated individual ready to take significant ownership and influence the product, architecture, and engineering culture from the outset. Your missionWe are searching for a Founding Engineer to become our first hire and collaborate closely with Alexandre, Co-founder & CTO.Your role will involve building our core product from scratch, which includes production AI systems, backend architecture, and user-facing features utilized daily by law firms and insurers.This position is not focused on research; instead, it emphasizes converting cutting-edge AI into dependable, real-world software within a complex, high-stakes environment. You will influence product decisions and maintain ownership of systems from early prototypes through to production.You will have a profound impact on our development, engineering practices, and the overall trajectory of Plato.ResponsibilitiesProduct & Engineering• Design, build, and launch core features across the platform, including AI pipelines and integrations.• Take charge of technical architecture decisions with scalability, security, and compliance as priorities.• Collaborate closely with the founding team and studio partners throughout the ideation to production process.• Participate in all aspects of product development and deployment.

Join Plato in Revolutionizing the Legal Tech Landscape!At Plato, we are pioneering the operating system for litigation lawyers, poised to transform the legal industry through innovative GenAI solutions. Litigation lawyers face a myriad of complex and repetitive tasks, from intricate damage calculations to reviewing extensive documentation and drafting legal materials. Our Vision: We aim to create the premier operating system for litigation lawyers, allowing them to reduce administrative and operational workload by up to five times, enabling a focus on strategic advocacy.Currently, Plato partners with approximately ten law firms and a major insurance legal team specializing in personal injury, leveraging our platform daily to manage hundreds of active cases.Founded in January 2026 by Ben (CEO) and Alexandre (CTO), our venture is supported by Hexa, Europe’s premier startup studio known for launching over 35 successful companies, including notable unicorns like Front, Aircall, and Spendesk, collectively achieving over €230M in ARR and attracting more than €750M in funding.With our solution already live and in active use, we are entering a pivotal phase of development. We are seeking a passionate individual prepared to take ownership and contribute to shaping the product, architecture, and engineering culture from the ground up. Your Role: We are looking for a Founding Engineer to become our first hire and collaborate closely with Alexandre, Co-founder & CTO. You will play a crucial role in developing our core product, including production AI systems, backend architecture, and user-facing features that law firms and insurance companies will rely on daily.This position is not research-focused; rather, it is about transforming cutting-edge AI into dependable, real-world software in a complex, high-stakes environment. You will influence product decisions and manage systems from initial prototypes to full production.Your contributions will significantly impact our development trajectory and engineering practices.

Become part of a visionary team that is transforming the future of global living from the ground up.At The Flex, we envision a world where renting a home is instant, smart, and effortless — as seamless as hailing a ride. Our bold ambition is to empower anyone to live anywhere, anytime, without any friction.Leveraging our proprietary automation engine, Base360.ai, we are constructing the operating system for modern rental experiences — linking property data, orchestrating operations, and facilitating seamless stays across the globe.This is not just another job where you merely handle tasks; this is an exceptional opportunity to establish the technical foundation of a groundbreaking company and shape the operational framework of a global platform at scale. What You’ll BuildAs a Founding Engineer, you will contribute to the design, construction, and scaling of the core technology that underpins The Flex, starting from scratch.Your responsibilities will span across product, engineering, and operations, where you will take ownership of systems from end-to-end: web applications, APIs, automation pipelines, integrations, and cloud infrastructure.You will make impactful architectural decisions early on — decisions that will influence the company for years to come — while rapidly converting ideas into production systems utilized in the real world.If you thrive in an environment of ambiguity, ownership, and building tangible solutions, this role is tailor-made for you. Your MissionBuild from Zero to OneCreate and implement the foundational architecture for bookings, payments, availability, and guest experience.Own the StackDevelop across frontend, backend, APIs, and cloud infrastructure — selecting tools and patterns that will scale effectively.Automate the BusinessTransform manual processes into event-driven workflows and intelligent automation from day one.Integrate the EcosystemEstablish deep integrations with platforms like Airbnb, Stripe, Hostaway, and Twilio.Ship RelentlesslyDeploy, monitor, and iterate on production systems with speed, reliability, and practicality.Solve Real-World ProblemsAddress challenges such as real-time booking synchronization, pricing intelligence, keyless access logic, AI-driven alerts, and operational dashboards.Set the Technical DNADefine engineering standards, best practices, and foster a culture of quality, ownership, and execution.

Role overview Panora, supported by Hexa, is hiring a Founding AI Engineer in Paris. As one of the first technical hires, this role shapes the company’s direction and leads the development of new AI solutions from the ground up. The team values original thinking and a focus on practical outcomes, encouraging new approaches in artificial intelligence. What you will do Design and build AI-driven products, playing a key role in technical decisions Collaborate with team members from diverse backgrounds to tackle complex challenges Lead projects aimed at making a meaningful impact in the industry Location This role is based in Paris.

About PanoraPanora is an innovative B2B platform that develops AI-driven agents specifically designed for insurance brokers, a sector characterized by stringent regulations and operational intricacies.Our vision is to establish ourselves as the AI Operating System for brokers throughout Europe, streamlining labor-intensive, repetitive tasks while enhancing compliance, advisory quality, and client engagement.Our product is already operational with brokerage firms in France and Belgium, showcasing AI agents performing tasks such as contract comparisons, coverage analysis, compliance evaluations, and assistance in applications like Outlook and Word.Founded by Diane, an ex-VC with a robust operational background, and Fabian, a repeat founder and product-centric AI engineer, Panora is supported by Hexa (formerly eFounders), the startup studio responsible for launching over 40 tech companies, including Aircall, Spendesk, and Front. We are now poised to enter a critical phase focused on structuring and scaling our platform.At Panora, AI is not merely an additional feature; it is the essence of our product. You will engage directly with Large Language Models (LLMs), agent-based systems, and production-quality AI pipelines, all while adhering to real-world regulatory and reliability standards from day one.About the RoleAs a Founding Engineer, you will be an integral part of the founding team, focusing on the core product and technical strategy.You will collaborate closely with the CTO and participate in all phases of the product lifecycle: from architecture and development to technical decision-making and ensuring production readiness.This is a hands-on, impactful role that offers significant ownership and influence over the company’s technical trajectory.ResponsibilitiesProduct & Engineering• Design, develop, and deploy key product features across AI agents, workflows, and integrations.• Take ownership of technical architecture decisions, ensuring scalability, security, and compliance.• Collaborate with the founding team to transform product concepts into production-ready systems.AI & Production Systems• Construct and refine AI pipelines (LLMs, RAG, agent-based systems) tailored for regulated real-world applications.• Guarantee reliability, traceability, and explainability of AI outputs in a production environment.• Optimize performance, cost, and quality as the platform expands.Ownership, Quality & Scalability

Hexa seeks a Founding Associate for the Hexa Sprint Program in Paris. This position plays a key role in shaping new projects and influencing the direction of ongoing initiatives. The Founding Associate works side by side with team members and stakeholders, guiding ideas from their earliest stages through to completion. Key responsibilities Lead projects from initial concept through execution Partner with colleagues from various functions Advance strategic objectives with practical, hands-on work Coordinate efforts with both internal and external stakeholders Location This role is based in Paris.

Join Aircall as a Founding Account Executive and become a pivotal player in our mission to revolutionize communication with cutting-edge AI technology. As we expand into the vibrant German market, we seek an individual who is passionate about sales and eager to contribute to the growth of our pioneering product.Your role will involve identifying and engaging potential clients, articulating the unique value of our AI solutions, and building lasting relationships that drive business growth. You will work closely with our product and marketing teams to tailor our offerings to the specific needs of the German market, ensuring that our solutions resonate with customers.

Join Verso, where we are revolutionizing consumer insights with our Consumer Intelligence OS. Our innovative AI-driven platform transforms traditional qualitative research methods by continuously analyzing consumer conversations at scale. Rather than relying on one-off studies, our clients gain a structured and ongoing understanding of their customers.Our mission is to embed consumer insights into every product and marketing decision, creating a real-time, always-on system. We are currently starting with AI-moderated interviews, but our long-term vision is to develop a comprehensive system for consumer understanding powered by dynamic workflows.Backed by Hexa (eFounders), we are building on the success of companies like Aircall, Front, Spendesk, Yousign, and many more.Our founding team brings deep expertise in strategy, technology, and entrepreneurship:Lydia - CEO: HEC graduate with 7 years at BCG (Principal), expert in strategy and consumer goods.Camille - CTO: Dual degree from X/HEC, former lead at CO2 AI, specialized in AI and scalable product development.

Join Theodo HealthTech as an Engineering ManagerTheodo has been supporting innovative businesses since 2009 in the design, development, and deployment of ingenious digital products, leveraging cutting-edge technology and the Lean methodology.Our unique approach is built on three core principles:- We have developed recognized expertise in key product design and development technologies;- At every project stage, our priority is to create value for our clients;- We recruit the top digital talents and foster their ingenuity through a lean approach.Theodo has experienced exceptional growth over the past 15 years, with over 700 passionate Software Engineers dedicated to technology and continuous improvement. As we grow, we have structured ourselves into specialized entities by technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and industry (Fintech, Govtech, Healthtech, Consumer Products Goods). By 2025, Theodo aims to generate €100M in revenue.At Theodo HealthTech, our health-focused entity, we support all health stakeholders in the development of tailor-made digital medical devices. Through our expertise in Lean and technology, combined with our knowledge of healthcare, we design and develop digital medical devices that integrate into patient care pathways (digital therapies - DTx, virtualized clinical trials, digitized care pathways). Our goal is to create products that change the lives of their users, whether they are caregivers or patients.

Join us at Verso, a pioneering startup supported by Hexa, as a Founding Fullstack Engineer. In this role, you will play a crucial part in the development of our innovative platform. You will have the opportunity to work on both the front-end and back-end of our applications, contributing to the overall architecture and enhancing user experience.We are looking for passionate engineers who thrive in a startup environment, are eager to take on new challenges, and are ready to shape the future of our company.

Welcome to Back Market!At Back Market, we are dedicated to making technology more reliable, affordable, and superior to new products. As a global marketplace for refurbished devices, we are committed to reducing our environmental footprint by offering trustworthy tech that boasts 92% lower carbon emissions compared to new devices.Indeed, purchasing refurbished tech is significantly better for our planet. Each device bought on Back Market contributes positively to the environment. Our team, from Customer Care to Software Engineering, is focused on providing eco-friendly technology solutions. Our mission is clear: to maximize the potential of what we already possess.Are you prepared to embark on this journey with us?Back Market is on the lookout for a Senior Technical Lead Manager to oversee our IT Ops Engineering team, which currently includes two engineers and one open position. This unique hybrid role allows you to mentor skilled engineers while developing automation and integration solutions that enhance the efficiency of our 700+ Back Makers daily.Your objective: Advance IT maturity across Back Market through technical excellence, authentic collaboration, and significant innovation. You'll spearhead impactful automation projects aimed at reducing repetitive tasks, implementing smart governance, and scaling our rapidly expanding international organization.YOUR RESPONSIBILITIES Enhancing Your Team DailyFoster a collaborative engineering team that delivers robust IT solutions that our internal customers will genuinely appreciate!Invest in the growth of your engineers through coaching, mentoring, and genuine career advancement opportunities.Cultivate a team culture where everyone feels a sense of belonging, can express their true selves, and are motivated to perform at their best.Promote open communication and a vibrant feedback culture, as effective teams are founded on trust and transparency.Technical Strategy & Hands-On ImpactWork collaboratively across the Platform group to align your team with company objectives and ambitious IT maturity goals.Develop roadmaps that integrate strategic long-term visions (governance frameworks, scalable architectures) with immediate tactical wins that provide instant value.Leverage a profound understanding of our SaaS ecosystem and how intelligent IT engineering enhances organizational effectiveness.

This opportunity is exclusively available for candidates currently residing in Europe.In this role, you will ensure that Waniwani's infrastructure remains seamless and efficient at scale.We have pioneered the first insurance application within ChatGPT, and now numerous companies are eager to launch their own AI-driven storefronts using our platform. Each of these businesses requires its own MCP server, unique codebase, and tailored distribution—all functioning flawlessly, interconnected, and overseen by you.About UsWaniwani is revolutionizing the AI distribution framework for the $10 trillion services sector. We empower businesses to offer quote-based services (insurance, wealth management, etc.) directly within LLMs, where consumer decisions are increasingly being made. Envision Shopify, but tailored for services. We are constructing the foundational infrastructure for AI-native commerce.We are at the beginning of a transformative platform shift. Our launch of ChatGPT insurance resulted in $26 billion in market cap losses for the world’s largest brokers within just 48 hours. The media dubbed it "the industry's ChatGPT moment." We refer to it as Day 1.Purpose of This RoleHaving surpassed the proof of concept stage, our product is fully operational. We now need to support hundreds of clients simultaneously, each requiring their own MCP server, bespoke data pipelines, and distribution dashboards, all while ensuring the platform operates smoothly.This position presents a systems-level engineering challenge. You will be responsible for the architecture that allows Waniwani to scale from a handful of deployments to thousands. You'll work with multi-tenant infrastructure, orchestrate multiple codebases, and manage real-time data flowing through hundreds of interconnected services. One flawed abstraction could cost us months, while one well-designed abstraction could save years.We anticipate that 95% of your code will be generated by AI. Your true value lies not in typing but in discerning what to build, how to architect it, and when the AI makes errors. You will operate at a pace that integrates LLMs as a fundamental part of your engineering process, not as a gimmick. The real constraint will be your judgment, not your typing speed.Your ResponsibilitiesOversee the multi-tenant platform. Design and sustain the infrastructure that accommodates numerous MCP codebases—each independent, customizable, and all viewable from a unified interface (or MCP).Construct the data backbone. Devise the pipelines and frameworks necessary for seamless data integration and analysis.

Join Theodo HealthTech as a Senior Software Engineer!At Theodo, we have been empowering innovative companies since 2009 to design, develop, and deploy ingenious digital products, leveraging the best of technology and a Lean approach.Our unique approach is grounded in three core principles:- We have developed recognized expertise in key product design and development technologies;- Our priority in every project stage is to create value for our clients;- We recruit top digital talents and cultivate their ingenuity through Lean methodologies.Theodo has experienced exceptional growth over the past 15 years, with a team of over 700 passionate Software Engineers dedicated to technology and continuous improvement. As we grow, we have structured into specialized entities by technology (Theodo Apps, Theodo Cloud, Theodo Data & AI) and by industry (Fintech, Govtech, HealthTech, Consumer Products Goods). By 2025, Theodo aims to generate €100M in revenue.At Theodo HealthTech, our specialized health entity, we assist all healthcare actors in developing tailored digital medical devices.With our experience in Lean and tech, combined with our healthcare knowledge, we design and develop digital medical devices that integrate into patient care pathways (digital therapies - DTx, virtual clinical trials, digitized care paths). Our goal is to create products that transform the lives of users, whether they are caregivers or patients.Your Responsibilities:As a Senior Software Engineer, your role will involve designing and developing web/mobile applications that are certified as medical devices.

Filiz is an innovative EdTech startup experiencing rapid growth in an upcoming international context. We simplify and automate the administrative and financial processes related to work-study and internship contracts. With our 100% online platform (SaaS), we enhance the experience for schools, businesses, and students by streamlining these processes, making them faster, more collaborative, and hassle-free. Say goodbye to paperwork and endless back-and-forth communication: everything is done in just a few clicks, flexibly, automatically, and centralized. Filiz is backed by Hexa Scale, a new initiative launched by Hexa (formerly eFounders) - the startup studio behind Aircall, Spendesk, and Front.Hexa Scale supports ambitious B2B SaaS companies with traction to help them scale up through tailored investments and operational support. Filiz has doubled its revenue for two consecutive years, relying almost entirely on inbound marketing and word-of-mouth.Now it's time to accelerate and build the sales engine that will propel us to the next level! Your MissionAs our first Sales Executive, your role is crucial in crafting the next chapter of our growth alongside Maxime, our Founder & CEO.The demand is validated. Now it’s time to scale. Your mission: build the outbound sales machine from the ground up and manage the entire sales cycle from initial contact to contract signing. Responsibilities1. Build and manage the outbound sales machine • Design and implement effective outbound sequences (tools, automation, rhythms) • Identify, qualify, and reach out to schools that are unfamiliar with our solution.2. Oversee the complete sales cycle and maximize conversion • Rigorously manage inbound and outbound sales pipelines • Conduct demos, handle objections, and close deals with precision and empathy • Prioritize quality over quantity - every lead matters3. Develop...

About PreludePrelude is revolutionizing user onboarding and authentication, focusing on trust, speed, and conversion in today's digital landscape.Our innovative solutions help businesses authenticate users with enhanced security and efficiency, transforming authentication into a strategic growth driver. Our flagship product offers the most effective OTP code delivery, utilizing optimal channels in real-time, including SMS and popular messaging apps like WhatsApp. Furthermore, we proactively combat spam and fraud, ensuring a seamless user experience and protecting company margins.Founded in 2022 and supported by prominent venture capitalists, Prelude has swiftly achieved robust product-market fit and strong financial health, catering to rapidly growing companies throughout Europe while expanding into the U.S. market. Our journey into authentication is just the beginning.With an ambitious product roadmap and a suite of market-transforming solutions, we are committed to building a trust-centric platform that empowers companies to onboard users effortlessly, combat fraud intelligently, and scale their operations with confidence.

Role Overview Prelude is looking for a Founding Go-To-Market Leader in Paris, France. This early leadership role shapes how Prelude brings its products to market and builds customer engagement from the ground up. As part of the founding team, this person will work closely with colleagues across different functions to set and carry out strategies that drive growth. What You Will Do Develop and implement go-to-market plans for new and existing products Work with product, marketing, and other teams to align strategy and execution Build customer engagement approaches that support business growth Help define Prelude’s market position as the company scales Who We’re Looking For Experience building and executing go-to-market strategies Comfort working in a founding or early-stage environment Strong collaboration skills across teams Strategic mindset with a hands-on approach