Fullstack Developer - Experienced Software Engineer at Shift Technology | Paris, France

Speechify is looking for a Software Engineer, Platform based in Paris, France. This position centers on developing and enhancing features for the company’s text-to-speech platform. Role overview The main goal is to design and build new capabilities that make Speechify’s platform stronger and more reliable. Work will directly support a better experience for users worldwide. What you will do Create and implement new features for the text-to-speech platform Contribute to projects that improve user experience for a global audience Location This role is based in Paris, France.

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.

About the Role Speechify is hiring an iOS Core Product Software Engineer in Paris, France. This role focuses on designing and building mobile applications that make text-to-speech technology more accessible and useful. The team values strong collaboration and aims to improve how people interact with information on their devices. What You Will Do Work closely with other engineers to develop features for Speechify’s iOS app Contribute to the design and architecture of new and existing mobile products Help refine the user experience for people who rely on text-to-speech technology Location This position is based in Paris, France.

Join our innovative team at Vusion Group SA as a Data Platform Engineer. You will play a pivotal role in designing, developing, and maintaining our data platforms, ensuring high performance and scalability. Collaborate with cross-functional teams to deliver state-of-the-art data solutions that drive business insights and optimize decision-making processes.

Location: Flexible (Paris Issy-les-Moulineaux). This role provides the opportunity to work from home while being close to an office location. The Role As a Senior Cross-Platform Software Engineer at GoPro, you will play a pivotal role in enhancing and sustaining the core software that powers GoPro’s software ecosystem. You will be tasked with developing and refining software and tools that are utilized in mobile applications, desktop software, the GoPro cloud, and GoPro cameras. We are looking for a candidate with expertise across multiple platforms, programming languages, tools, and build systems who thrives in an agile software development environment. In this position, you will create high-quality, thoroughly tested libraries and tools that are compatible across various platforms. Collaborating with platform-specific teams, you will integrate these libraries and tools to construct a unified software ecosystem designed to help users capture and cherish their most treasured photo and video moments. What You Will Do Design, build, test, and maintain cross-platform software for client application development teams. Engage with a diverse array of platforms (desktop, mobile, cloud, embedded). Explore various domains, including media file format support, graphics programming, AI integration, platform abstractions, and algorithm development. Continuously enhance the quality and reliability of the code. Advance the software engineering system for improved software management, integration, and build processes. Skills We’re Excited About Bachelor's degree in Computer Science, Engineering, or a relevant field. 3-5 years of experience in cross-platform software development using C++ and at least one additional programming language. Excellent communication skills, both written and verbal. Bonus Points For Proficiency in modern C++ (C++11 and newer). Familiarity with the CMake build system. Experience developing libraries and applications for Windows, macOS, Linux, iOS, and Android. Strong skills in git, including GitHub Actions. Proficiency in Java, Kotlin, Swift, Objective-C, C#, and Python. Experience with Xcode, Visual Studio, and Android Studio. Background in working with photo, video, or audio media. A passion for photography and videography. Why Work With Us?

sia is seeking a final year intern for a DevOps / Platform Engineer position in Paris. This internship targets students completing their studies who want to apply their knowledge in a professional setting focused on software development and platform operations. What you will work on Collaborate with experienced engineers on active projects Assist in deploying and managing cloud-based systems Automate deployment workflows Contribute to platform performance improvements Who should apply Students in their final year with an interest in DevOps or platform engineering Individuals eager to develop technical skills and participate in meaningful projects Those who enjoy working and learning as part of a team This internship provides hands-on experience and the opportunity to strengthen your expertise in a supportive team at sia, based in Paris.

Making preventive health the default for every human in EuropeThe missionAt Lucis, we are dedicated to transforming healthcare from a reactive model to a preventive one. Our goal is to develop an operating system for human longevity, empowering individuals to extend their healthy years. Discover more about our vision and values here.The roleOur team has successfully processed over 200,000 clinical tests across four countries and is experiencing a growth rate of 10% week over week. We are still in the early stages of our journey.We seek engineers who focus on building comprehensive systems rather than just features. You will take ownership of outcomes from start to finish, leveraging AI to enhance processes and elevate the standards around you.Your work will not be limited to writing boilerplate code; you will create specifications for agents, critically review AI-generated code, and make impactful decisions that build upon themselves over time. This is the modern landscape of engineering—if this resonates with you, we invite you to continue reading.Together, we will define the scope of your role—whether it be mobile, infrastructure, platform, AI, or full-stack—based on your strengths and our needs.What you could own:Full-stack vertical ownership: Manage everything from data models to APIs and user interfaces, ensuring they are production-ready.Algorithms: Collaborate with our medical advisors to convert clinical science into reproducible, auditable code.System architecture: Design a scalable, HDS-compliant infrastructure on AWS (using CDK/Terraform) capable of handling ten times the current load without requiring rework. Ensure strict adherence to HDS and GDPR regulations with robust security practices.Engineering culture: Facilitate team rituals, maintain high standards, and mentor through code reviews and specification assessments.Lead engineering rituals and foster continuous improvement through Agile methodologies and cross-team collaboration, ensuring the team remains at the forefront of excellence.About youYou are passionate...

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 PreludeAt Prelude, we are pioneering a new standard for user onboarding and authentication in an era where trust, speed, and conversion are paramount.Our innovative solutions streamline user verification, enhancing security and efficiency while transforming authentication into a strategic advantage. Our flagship product boasts the highest price-to-conversion ratio for OTP code delivery, intelligently adapting to utilize the most effective channels in real-time—whether through optimized SMS routing or popular messaging applications like WhatsApp. Additionally, Prelude actively mitigates spam and fraud risks that traditional providers often overlook, thereby safeguarding both profit margins and user experiences.Established in 2022 and supported by prominent venture capital firms, Prelude has rapidly achieved significant market traction and robust financial health, catering to fast-growing companies throughout Europe and making strides into the US market. Authentication is merely the beginning of our journey.With a forward-thinking roadmap and a suite of market-defining products in the pipeline, we are developing a scalable trust platform that empowers businesses to effortlessly onboard users, combat fraud intelligently, and expand confidently across the globe.About Our TeamThe Prelude team consists of former Zenly professionals who have experienced the limitations of current authentication systems firsthand. While developing products that serve millions, we recognized the challenges posed by costly and unreliable SMS authentication, leading to the inception of Prelude.Currently, our team of 40 is based in Paris, dedicated to creating high-performance, secure user onboarding solutions for businesses in Europe and the US. We believe that small, highly skilled teams are more effective than large, fragmented organizations, and we prioritize impact, quality, and agility.We embrace a flat organizational structure that enhances in-person collaboration, facilitating rapid idea exchange, grounded decision-making, and full ownership of our projects.Our core values guide our daily operations:CareWe are deeply invested in our customers, our colleagues, and the quality and reliability of our products.

About Scality:Scality is an innovative global software company dedicated to helping organizations store, protect, and access their data securely and reliably. Our advanced technology is trusted by leading brands, hospitals, media companies, and public institutions to manage vast amounts of digital information daily. With a diverse team spread across the globe, we foster a culture of trust, collaboration, and long-lasting relationships. Joining Scality means being part of a company that plays a pivotal role in shaping the digital landscape of today.Job Description:We are seeking a passionate Customer Support Engineer who is well-versed in technologies such as Linux, Kubernetes, Docker, ELK, Redis, MongoDB, SaltStack, Ansible, and S3. Your commitment to enhancing customer experience and your eagerness to collaborate with talented colleagues will be a valuable asset to our team.

sia is looking for a DevOps / Platform Engineer to join the team in Paris. This position centers on building and maintaining infrastructure that supports the company’s products and services. The work involves close collaboration with colleagues to ensure systems can scale as the business expands. Key responsibilities Work with engineers and stakeholders to support and improve core infrastructure Contribute to building stable systems that can handle company growth Develop solutions that help keep services reliable and available Who will thrive here This role fits someone early in their DevOps career, interested in learning from experienced professionals and gaining practical experience in a growing field. Location This position is based in Paris.

Join CFGI as a Manager in our Paris office. We are seeking a dynamic leader who is adept at guiding teams and driving strategic initiatives. This role involves overseeing project execution, enhancing operational efficiency, and fostering a collaborative work environment.

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.

Join vocca as a Software Engineer, where you will contribute to innovative solutions that enhance user experiences. We are looking for creative problem solvers who thrive in a dynamic environment. You will work on exciting projects, collaborate with a passionate team, and have the opportunity to grow your skills.

About the Codex Deployment Engineering Team The Codex Deployment Engineering team at OpenAI partners with clients to help them integrate AI-powered coding tools into their development workflows. The team works with a range of organizations, from startups to global enterprises, supporting software planning, development, and delivery. Collaboration is at the heart of this work, with a focus on helping engineering teams improve their processes and outcomes using OpenAI’s technology. Role Overview: AI Deployment Engineer OpenAI is hiring an AI Deployment Engineer in Paris, France. This role combines technical expertise with creativity and a strong interest in developer productivity. The position involves working directly with engineering leaders and practitioners to design, validate, and scale advanced AI workflows. Much of the work centers on using Codex to build demos, integrations, and automations that clients will use in production. This is a cross-functional position that blends technical architecture, product thinking, and client engagement. The AI Deployment Engineer collaborates with teams across Sales, Solutions Engineering, Product, Applied Engineering, and Codex, representing customer needs and helping shape product direction. The goal is to accelerate the deployment of intelligent coding systems at leading companies worldwide. Main Responsibilities Serve as the main technical contact for OpenAI Codex with client engineering teams, embedding closely to help establish and optimize coding workflows. Work with clients to design and implement AI-enhanced development processes, from early prototypes through to scalable production systems. Develop high-quality demos, reference implementations, and workflow automations using Codex as a core tool. Lead workshops, technical deep dives, and hands-on training sessions to support safe and effective adoption of AI coding tools within engineering organizations. Contribute technical content, such as examples, guides, patterns, and best practices, to the OpenAI Cookbook, supporting the broader developer community. Gather and analyze feedback from real-world customer deployments, turning insights into actionable product proposals and internal recommendations. Advise clients on how AI coding tools can improve their Software Development Lifecycle (SDL), influencing strategy and decision-making. This position is based in Paris, France.

We are seeking a talented and experienced Senior Software Engineer to join our dynamic team at believe. In this role, you will be responsible for designing, developing, and maintaining high-quality software solutions that meet the needs of our users. You will collaborate closely with cross-functional teams to understand requirements and implement innovative solutions that drive our mission forward.The ideal candidate is passionate about technology, has a strong foundation in software engineering principles, and is eager to tackle complex challenges. If you thrive in a fast-paced environment and are looking to make a significant impact, we want to hear from you!

Scaleway has provided secure and sustainable infrastructure since 1999. The company began with dedicated servers under the Dedibox brand, then expanded into cloud computing in 2015. Today, Scaleway is recognized as a European cloud provider. With support from the Iliad Group and €3 billion invested in building a sovereign AI alternative, Scaleway is positioned to address growing needs in artificial intelligence. The company’s work is shaped by three core values: simplicity, flexibility, and technical expertise. Scaleway serves a broad range of clients, including large enterprises like France Télévisions and Hachette Livre, startups such as Photoroom and Biolevate, and public organizations including the City of Copenhagen. Location This Software Engineer position is based in Paris. Scaleway also maintains offices in Lille, Toulouse, Rennes, Rouen, Bordeaux, and Lyon.

At Joko, we empower consumers to shop smarter. Our mission is to transform the shopping experience, enabling individuals to discover exactly what they need, make informed choices, and save money.Established in Paris, Joko is a certified B Corp tech company with a diverse team of over 90 talented individuals across Paris, Barcelona, New York, and beyond. More than 5 million users benefit from our services daily at over 10,000 merchants.From cashback and automatic coupons to price alerts and carbon tracking, we continuously enhance our offerings to make shopping more intelligent. Currently, we are developing an AI-driven shopping assistant to help users identify the best products based on price, quality, and sustainability.With profitability achieved in our core market, we are now focused on scaling our operations globally, particularly in the United States.Join us on this exciting journey and help shape the future of shopping! Our Engineering TeamOur Engineering team thrives on tackling advanced technical challenges with innovative solutions. Committed to product innovation and design, they are defining the future of the shopping experience. Their goal is to positively influence the daily lives of millions of users around the globe.Software Engineers collaborate closely with the Product team, engaging in exploration, design, roadmap prioritization, implementation, and production deployment. We’ve seen that teams with engineers who have diverse skills and foster close collaboration with product teams can deliver exceptional and innovative user experiences.As our Engineering team expands rapidly, we are dedicated to innovating across all areas of our product and tech stack, empowering a revolution in online shopping. Your ResponsibilitiesAs we scale to over half a million active daily users with zero-downtime expectations, you, as our Senior Staff Platform Engineer, will spearhead and shape our platform initiatives. You will be our pioneering senior engineer in this domain, consolidating current efforts across the team into a structured, reliable, and high-impact platform that accelerates safe shipping.Infrastructure: Enhance our production infrastructure to ensure it is scalable and resilient, focusing on runtime reliability, capacity, and failure management, allowing us to grow swiftly while maintaining stability.Monitoring & Alerting: Develop top-tier observability systems to ensure proactive monitoring and alerting, significantly enhancing our operational capabilities.

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