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CTO, Senior Full Stack Dev | RoR and Js/Typescript Expert | Remote

High response rate

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, Spanish.

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CEO / CTO with 7yrs xp of fullstack Rails dev. I raised +1.6m€ with the company I built from scratch. IoT and hybrid services expert.

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. 😌

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Seasoned Ruby developer with 12 years of expierence. Business challenges, reliable solutions and balance between tech debt and a modern stack.

Senior software full stack engineer with 12 years of experience in Ruby and JavaScript but I’m tech adaptive. My main competency is to solve business challenges, design reliable solutions and find a balance between tech debt and a modern stack. Constant learning and growth. Key Competences: — Software engineering using Ruby, Node, JS frameworks (Ract, Next, Remix); — Infrastructure setup using Docker, Kubernetes, GCP/AWS, CI/CD, Terraform; — System design and architecture according to DDD, Clean architecture and Microservices; — Business-oriented mindset, communication and collaborative skills, adaptive tech stack. Main stack: Tools: Ruby/Rails/Sinatra, JavaScript/Node/React/Redux/Jotai/TypeScript, Rust/Deno, Elixir/Phoenix, Go. DB layer: PostgreSQL/Sequel/ActiveRecord, Elastic, MongoDB, Redis, Firebase, OLAP. Frameworks: Ruby on Rails, Sinatra, Next.js, React/Vue.js, MaterialUI, Tailwind, daisyUI, shadCN Testing tools: RSpec/minitest, VCR, Cucumber/Capybara, Jest, RTL. Payment gateways: Stripe, Klarna, Braintree, Invoicing systems. Other tools: Apollo, GraphQL, Kafka, Sidekiq, Capistrano,, Rubocop, ruby-prof, Grafana. Hobbies: Motorcycles, bicycles, guitars. Education: Bachelor's degree in Robotics and Electromechanical Engineering. Latest position description: Technologies: Ruby/Rails/Sinatra, minitest/Rspec, Kafka, Grafana, GCP/GKE, Terraform, Docker, Sentry. Challenges and duties: - Design and implement microservices based on Sinatra rack framework with Sequel ORM and Kafka communication with core Rails API. Extract business logic and implement separate API endpoints according to business requirements and GDPR rules. - For example: Invoicing service with 3rd party API integration to generate and send invoices in Sweden; - Customer and orders data handling, scheduled cron and rake scripts with Ruby and Rails; - Develop and maintain core Ruby on Rails app, extract its logic into separated services. - Update and maintenance of infrastructure e.g. adding Linkerd service mesh and Velero backups to GKE cluster, update Docker images and circleCI/github actions configuration.

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