System Architect

Doctolib

WHAT WE DO Join a team of passionate and hardworking entrepreneurs to transform healthcare! Working in the tech team at Doctolib involves building innovative products and features to improve the daily lives of care teams and patients. We work in feature teams in an agile environment, while collaborating with engineering, design, and business teams.   WHAT YOU'LL DO We are looking for a Senior Software Engineer to join our Design System & Accessibility Team and help us become the #1 digital and secure medical companion for patients. We are part of the Platform domain, whose mission is to build and maintain the common building blocks of our system with a "Platform as a Product" mindset. We abstract and simplify the use of these complex, critical components, enabling product teams to focus on their core mission: building products faster for healthcare professionals and patients. Why this role matters: With 80% of Doctolib's traffic coming from mobile, we're on a mission to bridge the gap between our Web and Mobile Design Systems. You'll be a key player in unifying the user experience across platforms. As a Frontend Platform team, we support and empower all other Doctolib Tech and Product teams to create Accessible and best-in-class user experience frontend applications. We achieve our mission by providing a web and mobile design system, by writing supporting tooling around it and the Accessibility topic, and guidance as Accessibility experts. As a Senior Software Engineer, your responsibilities will include, but are not limited to: * Design, build, and maintain a scalable Web and mobile Design System built with React and React Native, ensuring a consistent, accessible, and high-performance user experience across Doctolib's web and mobile applications. * Drive the convergence of Web and Mobile Design Systems, ensuring visual and functional consistency across React and React Native components. * Develop and maintain React Native components, enabling seamless cross-platform experiences. * Upskill and mentor team members on React Native best practices, fostering a culture of mobile-first thinking within the Design System team. * Work hand-in-hand with Product Designers to translate Figma designs into robust, reusable UI components, ensuring visual and functional parity between design and code. * Champion accessibility (A11y) by embedding inclusive design principles into our Design System, developing accessible components, and providing guidance and tooling to help product teams build compliant and user-friendly experiences. * Drive adoption and quality of the Design System by supporting teams, improving documentation, establishing usage guidelines, and gathering feedback to inform ongoing improvements. * Leverage AI technologies to amplify the Design System's adoption and developer experience (DevX), applying prompting and context engineering to create intelligent assistants, automation, and migration tools that help developers build user interfaces more efficiently. * Occasionally extend your impact beyond the frontend, improving scripts, build processes, or CI workflows that support efficient delivery of the Design System.   WHO YOU ARE If you don't meet all the requirements below but believe this opportunity matches your expectations and experience, we still encourage you to apply! You could be our next team mate if you: * Have 5+ years of experience in Engineering; * Have strong hands-on experience with React Native, with a proven track record of building and shipping mobile applications; * Have a strong understanding of Design System architecture, component-driven development, and the collaboration between design and engineering; * Have solid experience with React and TypeScript, understanding the nuances between React Web and React Native development; * Have experience applying or promoting Accessibility (A11y) best practices (WCAG, ARIA, semantic HTML, assistive technology testing); * Are passionate about knowledge sharing and mentoring, with the ability to upskill colleagues on mobile development; * Understand the value of testing and code quality as foundations for scalable and robust interfaces; * Have the ability to adapt and choose the most efficient technologies to solve complex UX and engineering challenges; * Have proven experiences developing efficient, maintainable and secure products; * Are comfortable speaking English in your day by day with the team; Now, it would be fantastic if you: * Have experience building unified component libraries across Web and Mobile platforms; * Have a great understanding of JS/TS building and packaging processes; * Have a great understanding of web and mobile application performance tuning; * Have native iOS or Android development experience alongside React Native; * Have contributed to open-source mobile or Design System projects;   WHAT WE OFFER * Free comprehensive health insurance for you and your children * Parent Care Program: receive one additional month of leave on top of the legal parental leave * Free mental health and coaching services through our partner Moka.care * For caregivers and workers with disabilities, a package including an adaptation of the remote policy, extra days off for medical reasons, and psychological support * Work from abroad for up to 10 days per year thanks to our flexibility days policy * Work Council subsidy to refund part of sport club membership or creative class * Up to 14 days of RTT * Lunch voucher with Swile card   THE INTERVIEW PROCESS * Recruiter Interview * Feature Building interview * System Design interview * Behavioral Interview * Offer!   JOB DETAILS * Permanent Position * Full time * Location: Levallois, Nantes * Start Date: As soon as possible   If you would like to find out more about tech life at Doctolib, feel free to read our latest Medium blog articles!  At Doctolib, we believe in improving access to healthcare for everyone - regardless of where you come from, what you look like. This translates into our recruitment process: Doctolib is an equal opportunity employer. We don't just accept diversity at Doctolib, we respect and celebrate it! The more diverse ideas are heard, the more our product will truly improve healthcare for all. You are welcome to apply to Doctolib, regardless of your gender, religion, age, sexual orientation, ethnicity, disability, or place of origin. If you have a disability, let us know if there's any way we can make the interview process smoother for you!  All the information transmitted via this form is processed by Doctolib for the purpose of managing applications. For more information on how Doctolib processes your application data, click here. If you wish to exercise your rights or if you have any questions about the processing of your data, you can write to us at hr.dataprivacy@doctolib.com.

The Flex

At The Flex, we believe renting a home should be as effortless as booking a ride. Our mission is to enable anyone to live anywhere, anytime, without friction. Powered by Base360.ai, our proprietary technology platform, we are building the operating system for modern renting—automating operations, connecting fragmented systems, and creating seamless experiences for guests, landlords, and operators across the world. We're looking for a Full-Stack Engineering Lead to help scale both our technology and our engineering culture. This is a hands-on leadership role. You'll spend the majority of your time building products, solving technical challenges, and architecting systems while also helping guide engineering standards, mentoring team members, and shaping the future of the platform. If you're excited about ownership, rapid execution, AI, automation, and building products that have real-world impact, we'd love to meet you. WHAT YOU'LL BUILD As a Full-Stack Engineering Lead, you'll lead the development of Base360.ai, the technology platform powering every aspect of The Flex. You'll work across product, engineering, AI, and operations to create scalable systems that automate processes, improve decision-making, and accelerate company growth. You'll be responsible not only for what gets built, but how it's built. YOUR MISSION LEAD PRODUCT DEVELOPMENT Design, build, and launch high-impact products that improve guest experience, operational efficiency, and business performance. ARCHITECT SCALABLE SYSTEMS Make key technical decisions that ensure the platform remains scalable, reliable, and maintainable as the company grows internationally. DRIVE ENGINEERING EXCELLENCE Establish engineering best practices, code quality standards, development workflows, and technical documentation. MENTOR AND SUPPORT ENGINEERS Provide technical guidance, conduct code reviews, and help create a high-performance engineering culture focused on continuous improvement. BUILD AUTOMATION AT SCALE Develop systems that eliminate manual work and allow operations to scale efficiently across multiple markets. INTEGRATE CRITICAL PLATFORMS Build and maintain integrations with platforms including Airbnb, Hostaway, Stripe, Twilio, Google, OpenAI, and other strategic partners. LEVERAGE AI Implement AI-powered workflows, tools, and agents that improve productivity and decision-making across the business. COLLABORATE ACROSS TEAMS Work closely with product, operations, revenue, and leadership teams to translate business challenges into scalable technical solutions. TECH STACK Our current stack includes: * Python * FastAPI * React * TypeScript * Supabase * PostgreSQL * AWS * OpenAI APIs * Stripe * Twilio * Docker * GitHub Actions You don't need experience with every technology listed, but you should be comfortable learning quickly and leading technical decisions. WHAT WE'RE LOOKING FOR MUST HAVE * Strong full-stack software engineering experience * Experience designing and scaling production systems * Strong understanding of APIs, databases, cloud infrastructure, and system architecture * Experience leading technical projects from concept to deployment * Excellent problem-solving and communication skills * Ability to balance speed with engineering quality * Strong ownership mentality and bias toward execution BONUS POINTS * Experience leading engineers or technical teams * Startup or scale-up experience * Experience with AI products or LLM integrations * Experience with SaaS, marketplace, travel, or PropTech businesses * Experience with FastAPI, React, AWS, or Supabase WHAT SUCCESS LOOKS LIKE Within your first year: * Core systems become more scalable, reliable, and automated * Engineering velocity increases significantly * Technical debt is reduced without slowing innovation * AI-powered workflows are deployed across the business * New products are launched rapidly and effectively * Base360.ai becomes a major competitive advantage for The Flex WHY JOIN THE FLEX REAL OWNERSHIP You'll have direct influence over technology strategy, architecture, and product direction. BUILD AT SCALE Your work will power thousands of stays across multiple countries. LEAD BY BUILDING This is a hands-on role where you'll spend your time creating solutions, not sitting in meetings. SMALL TEAM, MASSIVE OPPORTUNITY Work closely with founders and help shape the future of both the platform and the engineering organization. PERFORMANCE-BASED REWARDS Competitive compensation with meaningful upside for exceptional performers. REMOTE-FIRST Work from anywhere. We care about impact, not hours worked. THIS ROLE IS NOT FOR YOU IF * You prefer large corporate environments with rigid processes * You enjoy managing more than building * You are uncomfortable making decisions with incomplete information * You require detailed instructions for every task * You are unwilling to take ownership beyond your immediate responsibilities If you're excited about leading by example, building world-class software, and helping create the operating system for modern renting, we'd love to hear from you. #LI-Remote

Harmattan AI

ABOUT US Harmattan AI is a next-generation defense prime building autonomous and scalable defense systems. Following the close of a $200M Series B, valuing the company at $1.4 billion, we are expanding our teams and capabilities to deliver mission-critical systems to allied forces. Our work is guided by clear values: building technologies with real-world impact, pursuing excellence in everything we do, setting ambitious goals, and taking on the hardest technical challenges. We operate in a demanding environment where rigor, ownership, and execution are expected. About the Role As an Electronic Warfare Team Lead, you will own the delivery of our electronic warfare and signal intelligence systems - from concept to field deployment. You will work hand-in-hand with project managers and technical leads to translate mission needs into system-level designs, coordinate multidisciplinary engineering teams, and ensure overall system performance, robustness, and reliability. The capability to detect, investigate, and exploit system vulnerabilities. Responsibilities * Electronic Warfare Team: Build, maintain and manage a cross disciplinary Electronic Warfare Engineering Team. * Electronic Warfare Systems and Technology watch: Drive architecture and implementation of Electronic Warfare Systems. Ensure state of the art knowledge in EW/SIGINT. * Technical Coordination: Lead cross-functional design across mechanical, electrical, software, GNC, and ML teams. * Trade-Off & Design Analysis: Conduct feasibility studies, trade-off analyses, and system-level simulations to guide technical choices. * Integration & Validation: Oversee system integration, prototyping, and validation, ensuring performance targets are achieved. * System Reviews: Drive design and architecture reviews, maintaining consistency between requirements, design, and testing. * Continuous Improvement: Implement processes to enhance requirements traceability, system documentation, and validation workflows. Candidate Requirements * 10+ years of experience in RF system engineering of Radio/Radar/GNSS and other Sensors within robotics, aerospace, or defense sectors. * Experience in Technology leadership in EW/SIGINT is a strong plus * Experience in Team leadership is a bonus, but not required * MSc in Engineering; PhD is a plus. * Proven experience leading full system lifecycles (concept → prototype → validation). * Strong background in RF, GNSS and Radar system architecture, requirements engineering, and system level trade-off analysis. * RF Signal Intelligence gathering and analysis for classification and AI training. * Broad engineering culture with understanding of mechanical, electrical, and embedded systems. * Experience coordinating multi-disciplinary teams and managing technical interfaces. * Rigorous, structured, and mission-driven mindset with strong analytical skills. * Excellent communication and documentation abilities. We look forward to hearing how you can help shape the future of autonomous defense systems at Harmattan AI.