Senior Software Engineer - React & Java

Role overview Harmattan AI seeks an Embedded Software Engineer to join the Paris office. The focus is on building embedded solutions that enhance multimedia applications and user experiences. What you will do Design and develop embedded software for multimedia systems Work closely with team members from various disciplines to bring new concepts to life Contribute to maintaining high standards for software quality and performance Location This role is based in Paris.

Join our dynamic team at Boulanger as a Home Intervention Specialist specializing in Multimedia and IT! In this role, you will provide essential support and solutions to clients in the Paris region and surrounding areas (91, 77). Your expertise in technology and multimedia will help our customers navigate their digital needs effectively.This position offers a unique opportunity to engage with clients directly, assist with installations, troubleshoot technical issues, and ensure a seamless user experience. If you are passionate about technology and enjoy helping others, this is the perfect role for you!

About UsSafran.AI, previously known as Preligens, is a subsidiary of Safran Electronics & Defense, specializing in artificial intelligence solutions designed to analyze high-resolution satellite images, full motion video streams, and acoustic signals. Our innovative technology serves the aerospace, defense, and governmental sectors.Since our inception in 2016, we have been developing complex algorithms and software that automatically analyze, detect, and identify military-relevant objects from both commercial and governmental data sources.Following our integration into Safran in September 2024, we are also contributing to the group's transformation by applying AI solutions to the Industry 4.0 sector. For example, our automated image analysis assists inspectors in detecting potential anomalies in critical parts through digital imagery.At Safran.AI, innovation and the creation of a safer world are at the heart of our mission. Joining us means working alongside passionate and multidisciplinary teams (engineers, researchers, developers) who are among the most talented in the industry, all driven by a shared passion for technological excellence. We foster a stimulating work environment where creativity and initiative are encouraged, and every idea is valued.

At Joko, we empower consumers to shop smarter and save money. Our mission is to transform the shopping experience, enabling individuals to make informed decisions about their purchases.Founded in Paris, Joko is a tech-driven company and a certified B Corp, boasting over 90 talented employees across Paris, Barcelona, New York, and beyond. Over 5 million users benefit from our services, saving money daily at more than 10,000 merchants through our platform.We offer a range of features, from cashback and automatic coupons to price alerts and carbon tracking, continually enhancing our products to facilitate smarter shopping. Currently, we are developing an AI-powered shopping assistant to help users identify the best products based on price, quality, and impact.Having achieved profitability in our primary market, we are now expanding globally, with a keen focus on the US market.Join us at the forefront of the shopping revolution! Our Engineering TeamOur Engineering team thrives on tackling advanced technical challenges with innovative solutions. With a strong emphasis on product design and innovation, they are shaping the future of shopping. Their goal is to positively influence the everyday lives of millions of users worldwide.As a member of the Engineering team, Software Engineers collaborate closely with the Product team throughout the entire process—from exploration and design to implementation and deployment. At Joko, we understand that teams composed of engineers with diverse skill sets, working in tandem with product teams, can deliver a truly delightful and innovative user experience.The Engineering team is rapidly expanding to continuously innovate across all facets of our product and technology stack, driving the transformation of online shopping. Your RoleAs a Growth Software Engineer, you will play a crucial role in scaling Joko's user and business growth through your coding expertise. Collaborating closely with the Product team, you will iterate quickly on key growth drivers—such as acquisition, retention, and engagement—as we expand into international markets, beginning with the US.You will work at the intersection of product and engineering, propelling the business forward within a dedicated cross-functional task force that includes key members from Marketing, Data, Business, and Product.Growth Experimentation: You will design, build, and deploy experiments across the entire user journey—from onboarding to retention—to drive significant results in key growth metrics.

At Joko, we empower consumers to shop smarter, revolutionizing the shopping experience by enabling informed decisions and significant savings.Originating from Paris, Joko is a pioneering tech company and a certified B Corp with a diverse team of over 90 skilled professionals located across Paris, Barcelona, New York, and beyond. With over 5 million users benefiting from our services at more than 10,000 merchants, we are committed to enhancing the shopping experience.Our innovative offerings include cashback, automatic coupons, price tracking, and carbon footprint monitoring. Currently, we are developing an AI-driven shopping assistant to guide users toward optimal product choices based on price, quality, and environmental impact.Having achieved profitability in our primary market, we are poised for global expansion with a strong emphasis on the US market.Join us on this exciting journey to shape the future of shopping!This position is remote-friendly for candidates in France and Spain. Our Engineering TeamsAs a Software Engineer at Joko, you will engage with a variety of cutting-edge technical challenges and impactful projects. Depending on your skills and interests, your contributions could span key areas such as:Tech: Work alongside the Product team to innovate Joko's user-facing products, taking full ownership from ideation through to deployment. You'll tackle complex engineering challenges, such as developing AI-powered shopping assistants or creating scalable algorithms to analyze extensive data from e-commerce platforms worldwide.Operations: Collaborate with all teams at Joko by designing and implementing software solutions that enhance operational efficiency at scale. Projects may include building customer support systems, improving fraud detection, or developing AI tools to streamline team operations. Your ResponsibilitiesAt Joko, we value ownership and adaptability. You will take full responsibility for your projects, guiding them from initial concept to live deployment, ensuring excellence and innovation throughout. We seek versatile engineers equipped with a broad range of technical skills to tackle complex, cross-domain challenges. Your key responsibilities will include:

Alice & Bob is pioneering the development of the first universal, fault-tolerant quantum computer aimed at tackling some of the most challenging problems in the world. Our innovative quantum computer is based on a revolutionary type of superconducting qubit known as the Schrödinger cat qubit. Unlike traditional superconducting platforms, cat qubits possess the remarkable capability to autonomously implement quantum error correction!We are leading the quantum revolution, standing shoulder to shoulder with industry giants like Google and IBM, and we are rapidly expanding following our successful €100 million funding round in 2025 dedicated to advancing our unique technology.With over 100 talented individuals, including physicists, PhD students, engineers, and seasoned business professionals, we are united in our quest to achieve our ambitious vision. Are you ready to join us as a quantum pioneer and help reshape the future?About the Role:The Calibration Team is tasked with automating the calibrations of our Quantum Processing Unit (QPU) to maximize its performance and ensure its operational reliability. As a Senior Software Engineer within this team, you will be instrumental in architecting the automatic calibration software. You will collaborate closely with quantum scientists to develop, maintain, and enhance the calibration processes. Additionally, you will work alongside other software engineers across the organization to facilitate seamless integration of your team's software with other in-house software components.

About H H focuses on advancing superintelligence through agentic AI. The company’s mission centers on automating complex, multi-step tasks that people usually handle, aiming for AI agents to help realize the full range of human potential. H seeks talented AI professionals who care deeply about responsible and safe development, as well as technical progress in agentic systems. The culture values openness, ongoing learning, and teamwork. Every team member’s input matters here. Product Engineering at H The Product Engineering team develops H’s Enterprise Platform, which provides customers with tools and services for essential operational needs. This platform supports large-scale computer-use agents, manages complex workflows, and offers a suite for observability, troubleshooting, and evaluation. Product Engineering connects AI research with practical applications and works closely with teams across the company.

At Swile, we are committed to enhancing professional experiences through innovative product solutions that alleviate daily challenges and elevate employee satisfaction. Our cutting-edge offerings in Fintech, Travel, HR, and Employee Benefits serve over 5.5 million users across 85,000 companies in France and Brazil, making a significant impact on the workplace.As a Senior Software Engineer, you will play a pivotal role in problem-solving, blending creativity with technical expertise. Your focus will be on delivering high-quality solutions swiftly and effectively, addressing both business and engineering challenges with innovative strategies rather than being restricted to specific technologies.

About Scality:Scality is a leading FrenchTech startup celebrated for its exceptional technical expertise and substantial contributions to open-source projects. As a proud member of the French Tech 120 (#FT120), Scality stands at the forefront of the software-defined storage industry, serving over 300 clients across more than 30 countries. This includes major telecommunications companies, banks, television networks, and over 30 healthcare institutions. Scality is committed to being an outstanding employer, offering numerous benefits such as ongoing education, sports budgets, worldwide paternity leave, and other perks that exceed standard market offerings. Additionally, Scality is dedicated to sustainability, heavily investing in remote conferencing solutions to reduce travel and offsetting the carbon emissions associated with business travel. Our internal motto is: “Work hard, play hard, eat well, and amaze the customer!” The phrase “Eat well” truly captures our ethos of enjoying life, which is a principle that Scality's team members embody wholeheartedly! Discover more about Scality on our Careers page. Get an insider perspective on the culture and everyday life at Scality. Stay updated by following us on LinkedIn, Twitter, and Glassdoor. Startup Perks! Generous RTT along with regular PTOTop-tier equipment (Apple/Dell laptops, Bring-Your-Own-OS policy, dual monitors)Stock option grantsIndividual performance incentivesFlexible work arrangements (up to 4 days remote/week or 2 days/month in-office) - must be a resident of France.Wellness and sports initiativesSubstantial training budget (for internal/external development, conferences, and coaching)Donation matching programAnnual company-wide “Kick-Off” eventFun food options: weekly breakfast gatherings, lunch delivery services, endless coffee/tea/chocolate drinks, and moreOffice entertainment: Babyfoot, Ping-Pong, board games, and organized group activities

About MistralAt Mistral AI, we harness the transformative power of artificial intelligence to streamline tasks, optimize time management, and foster creativity and learning. Our innovative technology is engineered for seamless integration into everyday work environments.We democratize AI through our high-performance, optimized, open-source models, products, and solutions. Our robust AI platform caters to enterprise demands, whether deployed on-premises or in cloud infrastructures. Among our offerings is 'le Chat', an AI assistant designed for both personal and professional use.We are a dynamic and collaborative team, deeply passionate about AI’s potential to revolutionize society. Our diverse workforce excels in competitive settings, dedicated to driving innovation. With teams spread across France, the USA, the UK, Germany, and Singapore, we thrive on creativity, humility, and team collaboration.Join us in redefining the future of AI. Together, we can make a significant impact. Discover more about our culture at https://mistral.ai/careers.About The JobMistral AI is on the lookout for an Applied AI Engineer to champion the adoption of our products, partnering with clients to tackle intricate technical challenges.The Applied AI Engineer - Software Engineer will play a crucial role within our Applied AI Engineering team, focused on ensuring the successful implementation of Mistral AI products. This role involves close collaboration with clients from pre-sales to post-implementation, ensuring our solutions not only meet but exceed client expectations.What You Will Do• Collaborate intensively with researchers, AI engineers, and product engineers on sophisticated customer projects, embedding advanced AI models into client software solutions.• Design, develop, and manage scalable full-stack applications, facilitating seamless interaction between front-end and back-end components.• Work alongside customers to craft complex use cases, providing expert guidance for optimal integration with back-end and front-end interfaces.• Partner with our product and science teams to continually enhance our product offerings and model capabilities, driven by customer feedback.About You• You possess fluency in English.• You hold a degree in Computer Science, Software Engineering, or a related discipline.• You have a minimum of 2 years experience as a technical contributor in advanced technology environments.• You demonstrate strong coding proficiency in Python and TypeScript.• Your passion for AI and innovation is evident in your work ethic and collaborative spirit.

Join our dynamic team at amo as a pivotal member of our Android engineering group. As one of the early hires in a product-centric company, you will play a crucial role in shaping our design and product decisions from the ground up.Initially, you will collaborate closely with our founding team, gradually taking ownership of key components and features. We are looking for adaptable engineers who are eager to contribute to various foundational aspects of the company as we grow.We are committed to developing a team of subject matter experts, and we value team members who dive deep into their fields of expertise.As an Android Engineer, your day-to-day responsibilities will include:Feature DevelopmentYou will be at the forefront of delivering innovative and high-quality UI features in a fast-paced setting. We encourage you to push the limits of what's possible, leveraging your expertise in low-level APIs, shader creation for dynamic effects, and custom rendering systems.Platform DevelopmentYou will actively contribute to the creation and enhancement of our platform. This involves developing careful abstractions utilized by other Android team members, such as media encoding, decoding and playback; performance tracing libraries; and our own components for navigation and deep links across applications. Your work will extend beyond individual features to encompass cross-company components.Roadmap Creation and IdeationYou will play a vital role in the roadmap creation and ideation process, where your experience will be crucial in identifying trade-offs and offering valuable insights from both product and engineering standpoints.Knowledge SharingWe emphasize continuous learning and knowledge exchange. Your involvement in staying current with the latest trends and best practices, attending conferences, engaging in online communities, and sharing your insights internally will significantly contribute to our collective growth.Owning Your ScopeYou will be responsible for monitoring analytics and managing system crashes. We value engineers who take ownership of their responsibilities, proactively addressing issues and triaging bug fixes.

About Mistral AIAt Mistral AI, we harness the transformative potential of artificial intelligence to streamline tasks, enhance productivity, and foster creativity. Our innovative solutions are crafted to seamlessly integrate into everyday workflows, making AI accessible and effective.We are committed to democratizing AI through state-of-the-art, open-source models and products that cater to both enterprise and individual needs, whether deployed on-premises or in the cloud. Our flagship offering, le Chat, is an AI assistant designed to enhance both personal and professional life.Our team is dynamic and collaborative, united by a shared passion for AI and its capacity to reshape our world. With a diverse workforce spread across France, the USA, the UK, Germany, and Singapore, we thrive in competitive environments and are dedicated to driving innovation. We embrace creativity, humility, and a strong team spirit.Join us at Mistral AI to be part of a groundbreaking company that is shaping the future of artificial intelligence. Together, we can create meaningful change. Discover more about our culture at https://mistral.ai/careers.Role OverviewWe are on the lookout for a detail-oriented and proactive Quality Assurance Engineer to join our dynamic team. In this pivotal role, you will be responsible for ensuring the reliability, accuracy, and performance of our AI-driven products. You will design and implement testing strategies for applications, APIs, and machine learning models, focusing on automated testing, edge-case analysis, and collaborative efforts with cross-functional teams to ensure seamless and high-quality user experiences. If you thrive in a fast-paced environment and are passionate about the quality of AI systems, this opportunity is ideal for you to make a significant impact.Key ResponsibilitiesAutomated Testing: Develop and maintain automated test suites to validate application features, APIs, and model integrations, ensuring end-to-end reliability and a superior user experience.Edge Case Testing: Collaborate with product managers and other stakeholders to rigorously identify and test edge cases, enhancing the robustness of platform features and models.Quality Tool Development: Contribute to the creation of tools and frameworks that facilitate efficient and scalable quality testing processes organization-wide.

Join our innovative team at 360Learning as a Website Software Engineer, where you will have the opportunity to work remotely from the vibrant city of Paris or anywhere else in the world. In this role, you will collaborate with cross-functional teams to design, develop, and maintain our cutting-edge web applications, ensuring an exceptional user experience.If you are passionate about coding, have a strong understanding of web technologies, and thrive in a dynamic environment, we want to hear from you!

Join our dynamic team at Roland Berger as a Software Engineer. You will play a pivotal role in developing innovative software solutions that drive our clients' success. Collaborate with cross-functional teams to design, implement, and maintain high-quality software applications.

About Mistral At Mistral AI, we harness the transformative potential of artificial intelligence to streamline tasks, enhance productivity, and foster creativity. Our technology seamlessly integrates into everyday workflows, empowering users to achieve more.We are committed to democratizing AI with high-performance, open-source solutions and cutting-edge models tailored for enterprises. Our versatile AI platform caters to various needs, whether on-premises or in the cloud, featuring innovative products like le Chat, your AI assistant for both personal and professional use.Join our dynamic and collaborative team, passionate about leveraging AI to drive societal transformation. Our diverse workforce excels in competitive environments and is dedicated to fostering innovation, with team members located across France, the USA, the UK, Germany, and Singapore. We pride ourselves on a creative, ego-free, and team-oriented culture.Become a part of a pioneering company that is shaping the future of AI. Together, we can make a significant impact. Learn more about our culture at: https://mistral.ai/careers.Role Overview We are on the lookout for a proficient Software Engineer specializing in Developer Experience. In this role, you will champion a collaborative and automated software development lifecycle. You will work closely with our product engineering teams to maintain code quality, enhance development speed through well-optimized CI pipelines, and ensure secure release processes. Your mission is to empower our software engineering teams with efficient workflows while safeguarding our production environments.Location: Paris Key ResponsibilitiesAs a Software Engineer focused on Developer Experience, your responsibilities will encompass:Developer Experience• Develop, monitor, and refine CI/CD pipelines to optimize development workflows and expedite deployments.• Design, operate, and maintain scalable, reliable, and secure multi-cloud infrastructures.• Identify areas for enhancement and innovate solutions that promote high developer velocity.

Join Scaleway, a pioneering cloud service provider, as a Software Engineer - Compute. In this dynamic role, you will collaborate with a talented team to design, develop, and maintain cutting-edge computing solutions that empower our global customer base. Your expertise will contribute to innovative projects that push the boundaries of technology and enhance our offerings.

Role Overview Theodo is hiring a Lead Software Engineer to join its Paris office. This role involves leading a team of developers on impactful projects, shaping software solutions with modern technologies, and setting a high standard for quality. What You Will Do Guide a team of engineers through all stages of software development Work closely with team members to deliver reliable, well-crafted solutions Apply current technologies and development practices to real-world challenges Mentor and support developers in their growth Encourage open communication and foster a collaborative team spirit Who We’re Looking For Strong technical background in software engineering Experience leading or mentoring development teams Clear communicator who can motivate and inspire others Comfort working in Paris or relocating to the city

Transforming the World Around UsPalantir develops the world's leading software for data-driven decision-making and operations. By providing the right data to those who need it, our platforms empower our partners to develop life-saving medications, predict supply chain disruptions, locate missing children, and more.Position OverviewAs a Forward Deployed Software Engineer (FDSE), you will work directly with government clients to identify their most critical challenges and create solutions that leverage their data. Our clients rely on Palantir's platforms for their most essential operations, often initiating projects with open-ended questions such as “Why are our flights frequently delayed?” or “How can we more effectively identify money laundering cases?”In your role as an FDSE, you will utilize your problem-solving abilities, creativity, and technical skills to help organizations maximize the value of their data, making a significant impact on the world. You will have the opportunity to gain rare insights and contribute to some of the most pivotal industries and institutions globally.Your responsibilities as an FDSE resemble those of a technical lead in a startup: you will collaborate in small teams with minimal supervision and be accountable for the end-to-end execution of high-stakes projects. Your day may involve discussing architecture with fellow engineers, managing large-scale data, coding custom web applications, engaging with the client's leadership team, or strategizing for your team.Whether you aspire to become an entrepreneur or a leader in engineering, we believe that Palantir is the ideal environment to cultivate these aspirations, surrounded by a supportive team. You will learn to dissect complex problems, understand the costs and implications of their solutions, and explore new technologies and programming languages, potentially developing them yourself. You will work independently and make decisions autonomously, all within a community that will challenge and support you throughout your journey and development.Our Principles• Impact: We undertake significant and ambitious projects that make the world a better place.• Responsibility: We manage our projects from inception to completion, ensuring accountability.

MissionAt Vizzia, we design and manufacture connected hardware solutions that are deployed at scale. Our products need to perform reliably under real-world conditions.Your primary mission is critical: Ensure the reliability of our hardware before it is deployed in the field.You will establish structured validation processes to preemptively address potential production issues.Fewer bugs mean fewer replacements and reduced maintenance needs.You will serve as the bridge between ambitious design concepts and practical production realities. ResponsibilitiesDevelop detailed, structured test plans: Including functional coverage, edge cases, and stress testing.Conduct validation campaigns across mechanical, electronic, and firmware layers.Make autonomous Pass/Fail decisions: Well-documented, justified, and defensible.Create clear, actionable test reports that highlight risks and potential failures.Critically evaluate hardware design choices based on validation evidence—going beyond mere validation to analysis.Collaborate closely with development and industrialization teams to ensure production readiness.Directly contribute to achieving a defect rate of ≤ 3% across our installed base.Ensure that no critical issues arise during production and testing phases. ProfileDegree in Embedded Systems, Mechatronics, or a related field.Strong expertise across the hardware spectrum: electronics, mechanics, and firmware.Experience with real-world hardware challenges, beyond theoretical design.Proven skills in writing comprehensive test plans: structure, coverage, and acceptance criteria.Self-sufficient in making Pass/Fail decisions: able to own and defend your conclusions.Familiarity with CE/RED and IP/IK standards.Exposure to industrialization environments.Highly detail-oriented: documentation and validation are second nature.Passionate about testing, validation, and developing robust systems.⭐ Nice to haveExperience with automated testing frameworks.Familiarity with project management tools.