Software Engineer - Developer

Join Scaleway as a Cloud Software Engineer and help shape the future of sovereign cloud solutions! At Scaleway, we are on a mission to build secure, sustainable infrastructures that empower ambitious organizations. Since our inception in 1999, we have evolved from a dedicated server provider to a leading cloud service provider in Europe, with a strategic focus on delivering simplicity, flexibility, and technical excellence. We are backed by the Iliad Group, which is investing €3 billion to develop a sovereign AI alternative to global leaders. As part of our Cloud Product Engineering team, you will design and implement core IaaS and PaaS components that support the delivery of reliable and scalable cloud services. You will collaborate with a diverse team of passionate engineers dedicated to advancing our cloud infrastructure and enhancing system resilience, ensuring that we continue to serve clients across various sectors, from large corporations to innovative startups.

Role Overview iliad-free is looking for a Software Development Engineer (F/H) to join its team in Paris. This role focuses on building and improving software that supports the company’s telecommunications services. What You Will Do Design and develop software solutions for iliad-free’s user-facing and internal systems Write, test, and optimize code to improve performance and reliability Collaborate with team members to deliver features that improve user experience Location Paris

Join Scaleway, a leading cloud service provider, as a Software Engineer specializing in Hardware Development. In this role, you will be instrumental in designing and implementing innovative hardware solutions that power our cloud infrastructure. Collaborate with a dynamic team of engineers to develop cutting-edge technologies that enhance our service offerings and meet the demands of our growing customer base.

About UsAt MARGO, our consultants focus on what truly matters: complex projects that blend intellectual challenges with significant business impact. We partner with leading players in finance, industry, and technology to design and develop high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why Join Our Software Engineering Practice?You will work alongside an experienced team led by Paul Blois, Practice Manager at MARGO for 5 years, and Prosper Gratian, Practice Lead and C++ Developer. Collaborating with them means benefiting from in-depth company knowledge, receiving close mentorship for your career growth, and contributing to demanding IT projects that have a high impact on our clients.Your Responsibilities- Design, develop, and optimize high-performance C++ components.- Participate in the migration of critical applications.- Contribute to the establishment of an internal framework for cross-functional applications.- Ensure code quality, performance, and maintainability.- Engage in code reviews, continuous improvement, and sharing best practices.Technical Stack: Modern C++ (C++17/20)Associated tools and technologies: Kafka, ElasticSearch, Git, CI/CD, AWS.Challenges: Performance, robustness, and managing large data volumes (processing 9 billion messages).Desired ProfileWe are looking for a passionate C++ developer with an interest in real-time systems and financial markets, eager to thrive in complex, high-performance environments.- Master's degree (engineering school or university).- Strong skills in C++, multithreading, performance optimization, and development best practices (SOLID, unit testing).- Experience in critical systems development and real-time data stream processing.

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.

Who are we?At MARGO, our consultants focus on what truly matters: tackling complex projects that combine intellectual challenges with real business impacts. We support major players in finance, industry, and technology in designing and developing high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why join the Software Engineering Practice?You will be part of a team led by Paul Blois, Practice Manager at MARGO for five years. Working alongside them means benefiting from in-depth company knowledge, receiving close support for your career development, and contributing to demanding IT projects with significant impact for our clients.Your Responsibilities- Design, develop, and optimize a new web application for the reporting, tracking, and auditing of insiders (staff with access to sensitive information) for a major banking client.- Participate in defining and implementing a high-performing and scalable architecture.- Address performance optimization challenges in both front-end and back-end systems.- Ensure code quality, maintainability, and security of the solution.- Collaborate closely with product, security, and infrastructure teams for seamless integration.- Contribute to code reviews, continuous improvement, and the sharing of best practices.Languages: Java 17, TypeScriptAssociated frameworks and technologies: Spring Boot, Angular 12, Git, CI/CDChallenges: performance, response time optimization, robustness, and regulatory complianceDesired ProfileWe are looking for a full-stack developer who is passionate about real-time systems and interested in financial markets, eager to work in complex and high-performance environments.- Education level: Master’s degree (engineering school or university).- Strong skills in both back-end and front-end development, multithreading, performance optimization, and good development practices (SOLID, unit testing).- Experience in developing critical systems, real-time data stream processing; experience in finance is a plus.- Ability to solve complex technical problems.

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.

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 UsAt MARGO, our consultants focus on what truly matters: intricate projects that combine intellectual challenges with real business impact. We partner with leading players in finance, industry, and technology to design and develop high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why Join the Software Engineering Practice?You will be part of a team led by Paul Blois, our Practice Manager for the past five years. Collaborating with him means benefiting from his in-depth knowledge of the firm, receiving close mentorship for your personal development, and contributing to demanding IT projects that have a significant impact on our clients.Your ResponsibilitiesJoin an international team of electronic trading experts dedicated to developing high-performance market solutions. Your tasks will include:- Designing and enhancing trading bots capable of executing complex real-time strategies.- Optimizing performance (latency, multithreading) and managing high data volumes.- Ensuring robust C# code, adhering to SOLID principles, with testing and code reviews.- Contributing to the management of Cloud infrastructures (Azure) and data security.Candidate ProfileWe are looking for a C# developer passionate about real-time systems and interested in market finance, eager to thrive in complex, high-performance environments.- Educational background: Master’s degree (engineering school or university).- Strong skills in C#, multithreading, performance optimization, and best development practices (SOLID, unit testing).- Experience in developing critical systems, processing real-time data streams; experience in finance is a plus.- Ability to solve complex technical problems and collaborate with multidisciplinary teams.- Enthusiasm for demanding environments.

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.

Who Are We?At MARGO, our consultants focus on what truly matters: tackling complex projects that combine intellectual challenges with real business impact. We partner with leading players in finance, industry, and tech to design and develop high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why Join the Software Engineering Practice?You will be part of a team led by Paul Blois, our Practice Manager at MARGO for five years. Working alongside them means benefiting from extensive company knowledge, receiving close support in your professional growth, and contributing to demanding IT projects that have a significant impact on our clients.Your ResponsibilitiesYou will collaborate closely with research and business teams, enabling regular feedback and participation in various strategic changes. The goal is to transform, migrate, and optimize the tools we use.As a Python R&D Developer, your tasks will include:- Developing and adding new features using Python and C++- Participating in the redesign and optimization of various tools- Adhering to development standards and code quality- Implementing tests to reduce technical debt and improve Time to Market- Tackling technical challenges such as real-time processing, parallelization, and high data volumeYou will have the opportunity to grow in an agile and human-sized environment where technical excellence and coding best practices are at the heart of our activities.Technical challenges include algorithmic complexity, real-time performance, optimization, and scalability.Technical Stack: Back End: C++ and Python; Front End: JavaScript; Unix/Linux 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 Esri as a Senior Software Development Engineer in Test (SDET) specializing in Network Diagrams. In this role, you will be integral in developing and executing testing strategies to ensure the quality and performance of our network diagram solutions. You will collaborate with cross-functional teams to design robust test plans, automate testing processes, and enhance our software development lifecycle. If you are passionate about delivering high-quality software and thrive in a collaborative environment, we want to hear from you!

About UsAt MARGO, our consultants focus on what truly matters: complex projects that combine intellectual challenge with real business impact. We support leading players in finance, industry, and technology in designing and developing high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why Join the Software Engineering Practice?You will be part of a team led by Paul Blois, Practice Manager at MARGO for 5 years, and Prosper Gratian, Practice Lead and C++ Developer. Working alongside them provides unparalleled insight into the company, close mentorship for your development, and the opportunity to contribute to demanding IT projects with significant impact for our clients.Your ResponsibilitiesYou will engage in the development of a core application for the front office of an investment bank, a booking tool that provides positioning and performs real-time risk calculations. This tool is essential for the trading floor and other data consumers such as risk management, accounting, and back office. You will be involved in:- Developing new features to enhance performance and reduce latency.- Optimizing code to ensure peak performance, particularly in multithreading and latency management.- Collaborating with front office teams and other client departments.Technical Challenges: Performance, multithreading, and latency management.Rich Functional Environment: You will work in a rich functional environment, interacting with several key departments.Tech Stack: C++ 17

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!

Who are we?At MARGO, our consultants engage in what truly matters: complex projects that blend intellectual challenges with real business impact. We collaborate with leading players in finance, industry, and technology to design and develop high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why join the Software Engineering Practice?You will be part of a newly established team led by Paul Blois, Practice Manager at MARGO for the past 5 years. Working alongside him means gaining in-depth knowledge of the company, receiving close guidance in your professional development, and contributing to demanding IT projects with significant impacts for our clients.Your missionsYou will join a newly formed team at a leader in the energy sector, tasked with designing an algorithmic trading platform dedicated to battery energy storage. This strategic project aims to stabilize the electrical grid by injecting energy during peak consumption.As a C# Developer, you will contribute to building a robust, scalable, and high-performance solution capable of managing assets across Europe and the United States.Your responsibilities include:- Trading Engine Development: Design the software components enabling algorithmic trading in Intraday markets.- Asset Optimization: Implement and run complex optimization models (considering weather, market prices, and consumption profiles).- Backtesting Platform: Develop a secure and efficient environment for traders to test and validate their algorithmic strategies.- Scalability & Evolvability: Participate in the architecture of a solution initially focused on batteries but eventually designed to integrate the entire renewable energy portfolio (wind, hydro, thermal).

Join our innovative team at dust as a Frontend Software Engineer, where you will play a key role in developing cutting-edge web applications that enhance user experiences. You will collaborate with designers and backend engineers to create seamless, responsive interfaces that delight our users.

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!

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