Senior Software Engineer - Electron Specialist

Join Aircall, a leading AI-driven customer communications platform, revolutionizing how over 22,000 businesses worldwide engage with their customers. Our innovative technology seamlessly integrates voice, SMS, WhatsApp, and AI into one cohesive workspace, enhancing team efficiency and driving revenue growth.At Aircall, we believe in empowering teams to work smarter through automation and AI. Our AI Voice Agent takes care of routine calls, while AI Assist optimizes post-call tasks, allowing teams to focus on what truly matters. The outcome? Enhanced revenue, quicker resolutions, and scalable teams ready to take on challenges.With our headquarters in Paris and a strong presence in North America, we’re building a product that customers adore and a rapidly growing business supported by top-tier investors. Our commitment to AI-driven innovation spans multiple product lines, ensuring we stay at the forefront of customer communication solutions.Our Work Culture: We prioritize customer obsession, data-driven strategies, and meaningful results. At Aircall, ownership, learning, and a balance of pace and thoughtfulness are key. If you thrive in a collaborative, fast-paced environment where trust and impact are paramount, you’ll find your place with us.We are seeking a passionate and dedicated Senior Software Engineer to join our Workspace team as a Desktop Specialist.As the primary architect of our flagship product, the Workspace, you will oversee the design, development, and deployment of our Electron application. Your role will be critical in ensuring a seamless and native-grade experience for our users by effectively bridging our web application with the operating system.Your day-to-day responsibilities will include advocating for best practices, mentoring fellow engineers, and maintaining a focus on quality, agility, and excellence in our delivery processes.

Join arago as an Electronics Engineer and become a pivotal part of our innovative team in Paris. We are looking for a passionate individual who is eager to design, develop, and implement cutting-edge electronic systems. Collaborate with cross-functional teams to bring groundbreaking products to market and make a significant impact in the field of electronics.

Alten is seeking an Electronic Design Engineer (H/F) to join its team in Paris. This position centers on electronic design work for a range of projects in different industries. Role overview As an Electronic Design Engineer, you will contribute technical skills to support ongoing and new projects. The work involves applying knowledge of electronic systems and collaborating with colleagues to deliver results that meet project standards. What you will do Participate in electronic design activities for multiple industry sectors Work as part of a team to develop and refine electronic solutions Apply engineering expertise to support project goals Location This role is based in Paris.

About Helsing Helsing is an AI company focused on defense, working to help democracies maintain control over their own ethical standards. The team includes engineers, AI specialists, and program managers who collaborate closely with clients. Helsing values open discussion about technology's role in defense, its benefits, and the ethical questions it raises. Role Overview: Lead Electronics Engineer The Lead Electronics Engineer will define and oversee the electronic architecture for Helsing's marine robotic systems. This person will guide projects from early concept through to validated, production-ready hardware. The position connects electronics directly with AI, software, navigation, and control systems, enabling advanced autonomous capabilities on Helsing's platforms. What You Will Do Shape the electronic architecture for marine robotic systems from concept to production. Work with AI and software engineers to ensure hardware interfaces, sensor integration, and power systems support onboard inference and real-time autonomy. Collaborate with navigation and control engineers to integrate electronic subsystems that improve guidance, communication, and decision-making at sea. Partner with mechatronics and test engineers to ensure designs are manufacturable, validated, and reliable in operational environments. Provide technical leadership, making architectural decisions that balance scalability and cost-effectiveness across disciplines. Contribute to the development of platforms such as the SG-1 Fathom and the Lura AI system, supporting the defense of democratic nations. Locations Munich, Berlin, London, Paris, Warsaw, Tallinn, and Plymouth. Learn More For details on Helsing's marine products, visit https://helsing.ai/de/lura.

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 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.

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.

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!

About Our TeamAt SumUp, we empower businesses ranging from cafes and shops to bars and hair salons with our innovative Point-of-Sale (POS) solution. Designed to enhance operational efficiency and promote growth, our system includes features such as product catalogs, inventory management, business analytics, compliance support, and loyalty tools.Our POS solution seamlessly integrates into the SumUp SuperApp, compatible with both our proprietary hardware and mobile devices like tablets and smartphones.As a Senior Android Developer, you will be part of a dynamic, cross-functional team that includes Product Managers, Product Designers, Engineering Managers, and fellow engineers.About the RoleWe are transitioning towards a Kotlin Multiplatform (KMP) strategy that facilitates shared development between Android and iOS. In this position, you will have the opportunity to learn, refine, and implement this technology, significantly impacting the future of our mobile applications.If you are a developer who prioritizes user-centric design, precision, and effective collaboration, and you thrive in a cross-functional environment, we want to hear from you.

believe is hiring a Senior Software Engineer with a focus on React and Java for its Paris office. This role centers on creating web applications that deliver effective user experiences. Key responsibilities Design and build web applications using React and Java Collaborate with colleagues across different teams to understand requirements and deliver solutions Support ongoing enhancements to software products Location This position is based in Paris.

Join our innovative team that is transforming the future of global living.At The Flex, we envision a world where renting a home is instant, intelligent, and seamless—much like booking a ride. Our mission is ambitious: to empower anyone to live anywhere, anytime, without hassle.Driven by Base360.ai, our unique automation engine, we are crafting the operating system for modern renting—integrating property data, streamlining operations, and facilitating smooth stays across continents.If you are passionate about complex systems, automation, and developing software that has real-world applications, this position offers you the opportunity to take ownership and make a significant impact. What You'll CreateAs a Senior Software Engineer, you will design, develop, and scale essential components of The Flex platform—from core services and APIs to automation workflows and real-time systems.You will work with considerable autonomy, managing problems from start to finish and directly influencing architectural decisions while remaining deeply engaged with production code.This role is for engineers who prioritize impact over meetings and take pride in constructing systems that are reliable, elegant, and scalable. Your ObjectivesDevelop Core SystemsCreate and maintain scalable services that enhance bookings, payments, availability, pricing, and guest experiences.Design Robust APIsEstablish clean, well-structured APIs that connect Base360.ai with internal tools and external partners.Automate OperationsConstruct event-driven workflows that eradicate manual tasks and unlock operational efficiencies.Deploy with AssuranceImplement and manage cloud-native infrastructure on AWS with an emphasis on reliability, security, and performance.Tackle Meaningful ChallengesEngage in real-time booking synchronization, pricing intelligence, keyless access systems, AI-driven alerts, and live operational dashboards.Collaborate for SuccessPartner closely with product, data, and operations teams to transform complex requirements into straightforward, effective systems. Ideal Candidate ProfileExtensive experience in building production systems with Node.js, React, and AWS.Solid understanding of software design principles and best practices.Proficient with CI/CD practices and tools.Strong communication skills and a collaborative mindset.

Join our dynamic team at believe as a Senior Software Engineer. In this pivotal role, you will leverage your expertise in React and Java to design and implement innovative software solutions that enhance our platform and improve user experience.Your contributions will be vital in driving our projects forward and ensuring the effective delivery of high-quality software. We are looking for a passionate engineer who thrives in a collaborative environment and is eager to tackle complex challenges.

Join our dynamic team at vusiongroupsa as a Senior Software Engineer, where you'll have the opportunity to contribute to innovative projects that shape the future of technology. We are looking for a skilled professional who can bring their expertise in software development, work collaboratively with our R&D department, and drive excellence in our engineering practices.

About VibeAt Vibe.co, we are revolutionizing the way brands connect with audiences in the streaming era. We envision that streaming TV transcends traditional brand awareness; it is poised to be the next major avenue for performance marketing. Our mission is to create the infrastructure that harnesses this $100 billion potential.As a leader in Audience First Streaming TV Advertising, Vibe.co empowers marketers to leverage TV as an effective growth channel. Our comprehensive solution integrates hyper-targeted audience segmentation, AI-driven insights, real-time campaign optimization, and incrementality measurement, providing brands of all sizes the accuracy and transparency they expect from social and search advertising, applied to the TV landscape.With over 10,000 trusted brands and a reach of more than 120 million households across 500+ apps and channels, Vibe.co consistently delivers an impressive average return on ad spend of 250% and a 20% lift in sales. Achieving a $100 million revenue run rate in less than two years, we are among the fastest software companies to reach this remarkable milestone.Our investors include notable firms such as Hedosophia (early backer of Spotify, Uber, and Airbnb), Elaia, Singular, QuantumLight, and Illusian, alongside angel investors like Carolyn Everson, board member of The Walt Disney Company and Coca-Cola. Nirav Tolia, CEO of Nextdoor, is also a member of our board of directors.Founded in 2022, Vibe.co is recognized as a pioneering platform in streaming TV advertising, merging the power of performance marketing akin to Meta and Google with the fast-evolving media landscape.About the RoleAs a key member of the Performance team, you will play a vital role in managing advertiser outcomes at Vibe. Your focus will be on bidding, pacing, and enhancing the prediction stack that drives these elements. You will report directly to Clément Schiano, Engineering Manager for Performance.This position has been created to address a clear roadmap and enhance execution capabilities, as well as to mitigate knowledge concentration challenges within the team. We seek an individual who can absorb, challenge, and expand upon existing expertise, going beyond simply delivering tickets.Three compelling reasons why a talented candidate would find this role appealing:

Join our innovative team at Datadog, where we are developing cutting-edge AI-assisted tools designed to empower our developers. Our mission is to autonomously generate tests, resolve bugs, and enhance software performance, driving efficiency and productivity.We are seeking a versatile and product-oriented engineer who can swiftly define and deliver products that enable Datadog's customers to become exceptionally productive developers.At Datadog, we prioritize a collaborative office culture that fosters relationships and creativity. Our hybrid workplace model allows our Datadogs to achieve a harmonious work-life balance that suits their individual needs.

Join Aircall, a groundbreaking AI-driven customer communications platform utilized by over 22,000 businesses globally, enhancing revenue, expediting issue resolution, and empowering customer-facing teams. We are transforming customer interactions by seamlessly integrating voice, SMS, WhatsApp, and AI into a cohesive workspace.Our growth is fueled by a core philosophy: enable teams to work smarter, not harder. With innovations like Aircall's AI Voice Agent automating routine calls, AI Assist simplifying post-call tasks, and AI Assist Pro providing real-time support, our solutions enhance productivity leading to increased revenue and swift resolutions.Headquartered in Paris, we also boast a robust North American presence in Seattle, along with teams across Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City. Our product has garnered a loyal customer base, and we are rapidly scaling with the backing of premier investors and a commitment to continuous AI innovation across our offerings.At Aircall, you will be part of a dynamic organization. We are ambitious, product-oriented, and execution-driven, emphasizing impactful work, swift decision-making, and genuine growth.Our Work Culture at Aircall: We are dedicated to our customers, driven by data, and focused on delivering impactful results. We value ownership, continuous learning, and thoughtful speed. If you excel in a collaborative, fast-paced environment where trust and impact are paramount, you'll thrive here.We are seeking a passionate and engaged Senior Software Engineer to enhance our expanding engineering department and contribute to our teams.As a Senior Software Engineer, you will lead the design, development, deployment, and operation of crucial features that deliver value to our customers. Your responsibilities will include ensuring operational excellence, monitoring key metrics, enhancing observability, promoting best practices, and mentoring team members across the Engineering division.Driven by quality, excellence, and agility, you will play a pivotal role in elevating our delivery processes. Utilizing NodeJS and Typescript within a robust back-end framework on AWS, you will tailor solutions to meet varied requirements.

The AI Platform is at the forefront of Datadog’s AI initiatives, encompassing everything from cutting-edge distributed training infrastructure for our state-of-the-art models to the essential frameworks that power Bits AI and LLMObs. We are on a mission to enhance our offerings beyond just model creation, focusing on the development of tools that will empower engineers to deploy production-ready generative AI systems. This includes creating retrieval-augmented pipelines, autonomous agents, and comprehensive evaluation harnesses.We are seeking a Senior Software Engineer to architect and develop this next-generation platform. You will collaborate closely with the Applied AI, product, and core infrastructure teams to deliver:Large-scale experimentation, training, deployment, and monitoring solutionsDeveloper toolchains tailored for agents and other generative AI applicationsLow-latency serving infrastructure that seamlessly integrates AI features into all Datadog productsAt Datadog, we value a vibrant office culture that fosters relationships, sparks creativity, and encourages collaboration. We operate in a hybrid work environment, allowing our employees to achieve a work-life balance that suits their individual needs.

Believe is a music company focused on supporting artists and labels. The team in Paris is looking for a Senior Software Engineer to help shape new projects and improve the digital platform. Role overview This position involves working with teams from different areas to create software that can grow with the company's needs. The work centers on building and improving products that help the music industry adapt and develop. What you will do Work closely with colleagues from various disciplines to design and develop software solutions Contribute technical expertise to projects that expand and strengthen Believe’s digital ecosystem Requirements Strong background in software development Interest in building products that support artists, labels, and the broader music industry Ability to collaborate effectively within cross-functional teams This role is based in Paris and offers the chance to contribute to projects that influence the future of music.

Paris | Full-time | Fluent in French & English The e-commerce landscape is evolving rapidly, yet independent brands often find it challenging to compete with the logistical efficiency of industry giants like Amazon. At Bigblue, we are dedicated to transforming this reality.Our mission is to empower brands by providing access to top-tier operational capabilities, enabling them to grow swiftly while ensuring an exceptional customer experience.Since our inception in 2018, we have developed an innovative tech-driven logistics platform that currently supports over 500 brands, ranging from rapidly expanding direct-to-consumer enterprises to globally recognized names such as MUJI, Aigle, and Cabaïa. With a talented team of 110+ employees across Paris, Madrid, and London, and our proprietary Warehouse Management System (WMS) Atlas, we are tackling logistics challenges that others shy away from — making fulfillment processes faster, smarter, and more sustainable.Backed by over $20 million in funding and trusted by the next generation of e-commerce innovators, we are experiencing rapid growth — aiming to handle 10 million orders in 2024 and embarking on ambitious enterprise expansion. The future is bright, and we’re searching for the right partners to help us lead the charge.

Join Our Team at KovaleeAt Kovalee, established in 2020, we are on a mission to revolutionize the mobile industry by empowering app developers to reach the pinnacle of their niche, irrespective of their resources. Our cutting-edge technology and deep expertise in user acquisition, app store optimization, product enhancement, and monetization enable developers to concentrate on their passion while we accelerate their app's growth. Our successful applications, such as Bend, PepTalk, and ParrotPal, showcase our commitment to excellence and our ability to drive results.Recognized as one of the fastest-growing startups of 2024 by Sifted, we are a diverse team of over 20 professionals from more than 15 nationalities, unified by a common goal: to redefine the mobile app landscape.We are seeking a Senior Software Engineer to become a crucial part of our team, responsible for creating and sustaining the foundation of our publishing platform. In this role, you will collaborate closely with operations to address real-world business challenges while helping us innovate rapidly and ambitiously. You will report directly to the CTO and work alongside another talented software engineer.