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

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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.

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Experienced Software Developer | Ruby on Rails | React/NextJS

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I’m a software developer with over four years of experience in building, maintaining, and deploying web applications. I specialize in Ruby on Rails and enjoy solving complex problems with simple, efficient solutions. How I Started I began my career as an intern at a small software consulting startup. That’s where I discovered Ruby and Ruby on Rails. I picked up the fundamentals quickly and was immediately drawn to its elegance and flexibility. My first project was maintaining a large fashion rental platform. At first, the sheer size of the codebase was daunting, but I saw it as a challenge. I dove into debugging and optimization, fixing bugs, improving performance, and eliminating bottlenecks. These experiences gave me a solid understanding of the system and laid the foundation for my career. Over time, I moved from maintenance to developing new features. This transition gave me the opportunity to design and implement functionality that directly impacted the business. Key Contributions Here are some of the key contributions I’ve made to projects: - Third-Party Authentication: Rebuilt Google, Facebook, and Apple authentication features from scratch after library issues caused them to fail. - User Reviews: Developed a review system for renters and lenders, improving transparency and trust. - Mobile App Overhaul: Updated a hybrid iOS app to ensure compatibility with the latest framework. - SMS Notifications: Added SMS alerts to keep users informed about their transactions. - “Buy Now” Feature: Enabled lenders to sell items, responding to customer demand and expanding the platform’s offerings. - Stripe Payment Integration: Built backend features for handling disputes and charges. - Real-Time Messaging: Migrated the messaging system from ActionCable to Turbo Hotwire and redesigned the user interface. These contributions significantly boosted the company's revenue growth, attracted new investments, and paved the way for expansion into multiple white-label platforms. I was also entrusted with architecting and leading the development of the first three white-label platforms, implementing the same infrastructure as the base rental platform. What I Do Now I currently work on multiple projects across industries, including eCommerce, SEO, Marketing and learning platforms. My role includes development, maintenance, and DevOps. I take pride in delivering stable, scalable systems. Why Me? Coding excites me because it’s not just about writing lines of code—it’s about creating solutions, crafting experiences, and turning complex challenges into elegant outcomes. Each problem I solve gives me a profound sense of accomplishment, driving me to push boundaries and exceed expectations. When I work on something, I don’t just aim to get it done; I aim to do it exceptionally well. If you’re looking for someone who not only does the work but genuinely loves it, then I’m exactly who you’re looking for.

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Rails dev (15+ years) | Backend Engineer | Staff Engineer at your disposal.

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I'm an experienced Full-Stack Ruby on Rails Developer. Proficient in Hotwire, Turbo, Stimulus, JavaScript, Python, Kotlin, AWS, Github, Heroku, and various other technologies. Skilled in self-management for independent projects and good as a collaborative team player. I have worked in healthcare, digital identity, security, social media, and others. I have 15+ years of development and management experience, including my work for big Tech companies (EU / US). As a remote engineer, I'm here to turn your ideas into reality. Whether working solo or coordinating a team, count me in to get the job done. What I Can Do for You: Software Architecture: I can design robust, scalable architectures tailored to your project’s needs. Tech Consultancy: I provide strategic guidance to overcome technical challenges and align your technology with your business objectives. Tech Roadmap Planning: Let’s create a clear and actionable roadmap to achieve your technology goals. Tech Radar Creation: I’ll help you identify, assess, and track technologies to keep your tech stack future-ready. Boost Performance: I’ll help you identify what’s slowing down your app and get it running fast and smoothly. Lead Refactoring: If your codebase has become hard to manage, I can lead the way in cleaning it up and making it scalable and maintainable. Breathe Life into Legacy Systems: Stuck with an old app that’s becoming a headache? I specialize in bringing legacy code back to life. Smooth Migrations: I'll ensure the transition is seamless with minimal disruption, whether you’re moving to a new version or an entirely new system. Customised Rails Workshops: I can onboard your team quickly to get essential knowledge in Ruby and Ruby on Rails with workshops (onsite in Hamburg, Germany, or Remote) tailored to your business needs. If you're facing challenges with your Rails project or looking to improve things under the hood, I’d love to help. Let’s connect and see how we can get your system running at its best! Cheers! Andrey

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Full-Stack Engineer | Ruby On Rails | ReactJS | Hotwire | Turbo | Stimulus | Tailwind-CSS

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I'm Veteran Full-Stack Ruby on Rails Developer with ReactJS expertise. Proficient in Hotwire, Turbo, Stimulus, JavaScript, AWS, Github, Heroku, and various other technologies. Skilled in self-management for independent projects and a collaborative team player. I have worked in different domains like healthcare, legal, security, construction, social media and others. I'm passionate about coding, especially in Ruby with the magic of Rails making things smooth sailing. I've built plenty of projects, and now I'm excited about combining Ruby on Rails with AI. I'm skilled with Git, RSpec, and handling databases. I also know my way around frontend tech like ReactJS and AngularJS, as well as integrating APIs. I've led small developer teams back home, using tools like GitHub, GitLab, JIRA, and Linear. I'm fluent in Gujarati, English, and Hindi, making communication a breeze. As a remote developer, I'm here to turn your ideas into reality. Whether it's working solo or coordinating a team, count me in to get the job done. I can provide a wide range of services that are designed to attract attention and cater to the most searched for needs. Here are some examples of the services I offer. -> Web application development -> Font-end UI/UX development -> Back-end REST APIs development -> Application deployments on cloud -> Version upgrades -> Technical lead for teams -> Application maintenance or support -> Technical consultation -> Project management -> Problem solving -> Small project to large (feature, enhancement, bug, issues)

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