Hire principal / staff Ruby on Rails developers in France

Senior software engineer with over 10 years of experience as a remote freelancer. My educational background includes an MSc 2:1 in computer science and applied mathematics engineering from ENSEEIHT (Toulouse, France) in 2009. I then worked for 2 years as a frontend developer at a startup in London and transitioned to backend work in 2013. Specializing in web application development, I have undertaken projects for companies such as Carrefour, L'Oréal, Cocolis, Epicery, and Alerti. My work has encompassed backend development, data engineering, code and database performance improvement, e-commerce platform customization and logistics, payment system integration, API creation, crawlers, technical documentation, and testing. Passionate about data manipulation and rendering them to users and stakeholders in a more meaningful way, I am currently expanding my skills in AI/ML and neural networks through CNRS fidle formation to explore how I could apply and offer these services to my clients. Recent milestones and accomplishments include: Migrating the payment system from Adyen to Stripe for Epicery Migrating the frontend from Vue to Hotwire for Epicery Developing a geolocalized matching algorithm between carriers and packages for Cocolis Fields of expertise: E-commerce solutions with Solidus/Spree open-source framework Data processing and visualization with Business Intelligence tools for reporting Integration of payment system providers Integration of third-party APIs Database design and performance optimization Frontend performance optimization Crawling and scraping Technical audits Testing, documentation, CI/CD tools Experience with the following tools: Languages: Ruby, Typescript, JavaScript, Node.js, Ruby on Rails Platforms: AWS, Google Cloud Platform, Render, Heroku Frontend: React, Vue.js, Hotwire, Angular, HTML/CSS, Alpine.js, HTMX, Astro Payment providers: Stripe, Mangopay, Adyen, PayPal Data viz: Amazon QuickSight, Superset, Tableau Backend tools: Solidus open-source e-commerce solution, New Relic, Elasticsearch, PostgreSQL, Amazon S3, etc. CI/CD Tools: GitHub CI, CircleCI Fluent in French, English, and Spanish.

Hi there 👋 I'm Oussama, a passionate Ruby on Rails developer with over 13 years of hands-on experience in crafting robust web applications. My journey began with a fascination for elegant code and scalable architectures, and it has since evolved into a relentless pursuit of excellence in software engineering. 💼 Professional Background I have been deeply immersed in the Rails ecosystem since its earlier iterations, witnessing its growth and evolution firsthand. Throughout my career, I've contributed to various projects, ranging from startups to enterprise-level applications, consistently striving to leverage the best practices and emerging technologies to deliver high-quality, efficient solutions. 🚀 Expertise My expertise spans across: Ruby on Rails Development: Proficient in building full-stack applications, RESTful APIs, and microservices using Rails, ensuring scalability and maintainability. Database Design and Optimization: Experienced in designing database schemas and optimizing queries to enhance performance. Test-Driven Development (TDD): Strong advocate of TDD principles to ensure code reliability and maintainability, utilizing RSpec and other testing frameworks extensively. Frontend Technologies: Skilled in frontend development with JavaScript, React, or Ember.js, ensuring seamless integration with Rails backend. 🌟 What Drives Me I'm passionate about leveraging technology to solve complex problems and create impactful solutions. I thrive in collaborative environments, where my experience and expertise can contribute to innovative projects and foster a culture of continuous improvement.

Since beginning my journey in web development with Ruby on Rails in 2017, I've been driven by the desire to innovate and lead in the tech space. I founded a music-tech startup, coding 65% of our product myself and leading our talented team of seven to secure €1.6m in funding. Our company, now profitable and fully automated, provides 24/7 accessible studios for music producers and content creators. Our journey in the IoT and music-tech sectors has honed my skills in holistic product design, development, and management. I ensure our products meet end-user needs while seamlessly integrating various professional disciplines, achieving both high performance and strict adherence to timelines. 🛠️ Technical proficiencies: - Languages and frameworks: Ruby 3, Rails 7, TailwindCSS, ViewComponent, Turbo, Stimulus JS. - Testing and opperations: Minitest, Yarn, Sidekiq, Heroku, Redis. - IoT and automation: Raspberry Pi, Home Assistant, smart devices, and API integrations. - Payment and marketing systems: Stripe (Payments, Billing, Identity, Connect), marketing automations with n8n. 😌 Additional skills: - Expertise in marketing, UX design, branding, and both headless and no-code CMS platforms. - Proficient in data science, focusing on data collection, manipulation, and enrichment. 🏢 Industries I add value to: - Music and entertainment, IoT, real estate, travel, cooperative sciences, and hybrid business models. - Extensive experience in industries related to scuba diving and smart buildings. 👀 Looking forward: I am eager to explore new projects and collaborate with teams that aspire to reach and exceed their goals. If you're seeking a seasoned developer with a proven track record and broad industry expertise, let's connect and discuss how we can work together to achieve something exceptional. 😌

I'm a dev, a CTO, an entrepreneur and a geek. As a dev I first developed in python and C during 12 years. I developed a network security solution used by 3 millions of people. Then I switched to ruby and rails in 2014 first for a startup then as a freelance. I helped bootstrap several startups (moka.care, Watura, Me and you too, Eben Home) and reinforced teams in big companies (Doctolib, Richemont, EDF) At Squadracer, I grew the team from solo freelancer to 18 people from 2018 to 2022. Post covid was a difficult time and the team was reduced to 4 people. I was also a CTO since 2004, I'm attached to empowering people through agile and opal organization. It allows me to create an amazing team while keeping a lot of time to continue being a dev. I have a no ego policy allowing me to work in whatever position my skills are useful. I can help a lot off people by being a jack of all trade: I can do dev : linux system, back, front, devops but also CRM (hubspot, salesforce), management, product. As a geek, I also love IOT and telephony. When I was a student I had 3 vlan, 2 internet connections, 3 telephony providers. I used my voip phone in one room to turn of my screen in the other room. I reversed my electric shutter with an oscilloscope, and built a home automation center.

Hi, I'm a french programmer in the process of relocating to the US (San Francisco) through an E2 visa (Investor visa). I will open my own agency and would love to have you as my client. I can work from France to start and from the US in winter 2023. I have deep expertise in Ruby on Rails and Ruby and know my way around React and Stimulus (and JavaScript in general). I worked in the US and in France for Bespoke Post, Trusted, Doctolib and thoughtbot. My daily rate is $1000/day. Thanks, Dorian

As a seasoned developer with a rich 12-year journey from initial designs to IPO-ready internet applications, I bring a wealth of expertise. Specializing in Ruby, I've honed my skills in building and scaling applications effectively. My experience extends to working with renowned companies like FinalCAD, Lyst, Ilek, Nedap, Pipplet, and Team Satchel, to name a few. My forte lies in a versatile skill set that covers strategic planning, operational efficiency, and tactical execution. This includes scaling engineering teams, enhancing infrastructures, and mentoring talent to foster growth. I thrive in transforming backends for multi-region hosting and automating systems for efficient deployment. Embracing remote work since 2018 and having lived across continents, I excel in adapting to diverse environments and delivering flexible, innovative solutions. Partner with me to elevate your company's technological capabilities and chart a path toward unprecedented success. Illustation from https://unsplash.com/@jazminantoinette

Hey! I'm a product and software engineer with over 10 years of professional experience and a degree in Computer Science from Epitech. I have extensive experience in full stack engineering, from infrastructure (e.g. Terraform and Docker) to the backend (e.g. Ruby on Rails and Node with Express) and the frontend (e.g. React/Redux). I’ve had the chance of building products in a wide variety of industries, including: marketing automation for enterprise companies, human ressources for SMBs, and logistics for E-commerce DTC brands.

Software engineer & DevOps with 15+ years of experience in applications development and infrastructures management. I offer a wide range of services from Ruby on Rails projects consulting and development to the deployment of cloud infrastructure on Amazon Web Services.

With over two decades of experience in software/application development, I've cultivated an expertise that spans multiple technologies and industries. Beginning with Java, I honed my skills within the heart of France's major banks and industries, mastering the foundations of software architecture. A decade later, my passion led me to Ruby, ushering in a new era of innovation. From dynamic startups like HelloPrêt to industry giants such as Doctolib, EDF, and Smart Pension, I've thrived in diverse environments, leveraging Ruby's flexibility to deliver exceptional solutions. Mentoring: Throughout my journey, I've embraced the role of mentor, guiding junior developers to unlock their potential and fostering a culture of collaboration and excellence. By offering advice and assistance, I've not only enhanced team productivity but also cultivated a cohesive and supportive work environment. Test addict: Testing isn't just a task – it's a philosophy that I've embraced since my inaugural professional experience in 2004. From unit tests to performance evaluations, I've championed the importance of comprehensive testing, recognizing its pivotal role in crafting resilient, bug-free software. Beyond mere functionality, tests empower us to build applications that are not just robust, but also easily maintainable. Performance lover: I'm passionate about performance optimization. Whether it's identifying and fixing N+1 queries, optimizing database indexes, or fine-tuning JVM settings, I love diving into performance challenges. Each problem is unique, and I enjoy finding tailored solutions to ensure systems run smoothly and efficiently.

I am an experienced developer, specialized in creating tailor-made IT solutions. With strong expertise in web development, I am passionate about creating innovative and high-quality products. I also have very strong skills in architecture, cloud, security, DB, UX, UI and devops. Most of the time i deal with postgresql, hotwire, turbo, active storage, tailwind, redis, docker and much more. My close collaboration with clients, my commitment to excellence and my flexibility make me the ideal partner to transform your ideas into technological reality. Contact me to discuss how I can contribute to the success of your project.