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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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Senior Rails Developer

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.

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GSoC'23 GitLab | LFX Mentee'23 @CNCF - Cortex | GSoC'22 GitLab | GitLab Core Team Member | GitLab Hero 🦊 | Git contributor

I am excited to share my recent accomplishments and experiences. This summer, I had the privilege of being selected as a Google Summer of Code 2023 Student Developer at GitLab for the second consecutive year. My GSoC project focused on enhancing GitLab's merge request comparisons using git range-diff, enabling effective code reviews and validating changes during rebasing. Here is the link to the project: https://summerofcode.withgoogle.com/programs/2023/projects/Z0MnDIgd Additionally, I am currently a mentee for The Linux Foundation's LFX Mentorship Spring 2023 Program, where I am actively involved in the Cortex Project. My contribution revolves around implementing an API in Cortex to simplify the migration of data from Prometheus to Cortex by importing old Prometheus TSDB block data. Here is the link to the project: https://mentorship.lfx.linuxfoundation.org/project/184ccb3e-6abe-4bf9-9659-b42b5c07c5a5 During the previous summer, I participated as a Google Summer of Code 2022 Student Developer at GitLab, where I collaborated with the Gitaly team, responsible for handling Git RPC calls within GitLab. I successfully integrated the mailmap feature into GitLab and contributed to improving the performance of the contributor graph feature by utilizing git-shortlog. One can explore my GSoC journey on my personal blog : https://siddharthasthana.dev/archives/ Here is the link to the project: https://summerofcode.withgoogle.com/archive/2022/projects/yaKP2iJK My GSoC work got highlighted in the GitHub and Git communities. Here is the link: — https://github.blog/2022-10-03-highlights-from-git-2-38/ — https://github.blog/2023-03-13-highlights-from-git-2-40/ — https://git.github.io/rev_news/2022/10/26/edition-92/ I have been actively contributing to other OSS projects like Zulip which is a real-time team chat system and Git, a distributed version control system. At IVY, I have written functions and tests for the ML transpiler and deep learning framework. In the process, I learned not only about how web platforms work, but also have some knowledge of how low level systems like kernel work. Here are the OSS contributions in GitLab, Git and Zulip: GitLab: https://gitlab.com/dashboard/mergerequests?scope=all&state=merged&assigneeusername=edith007 Git: https://lore.kernel.org/git/?q=Siddharth+Asthana Zulip: https://github.com/zulip/zulip/pulls?q=is%3Apr+author%3Aedith007+is%3Aclosed IVY : https://github.com/unifyai/ivy/pulls/edith007 Furthermore, I am thrilled to announce my recent recognition as a GitLab Hero and my inclusion as a Core Team Member of GitLab. These accomplishments demonstrate my deep involvement in the open-source community and my commitment to driving impactful contributions.

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Head of Engieering at Neyo

I am a highly skilled and dedicated full-stack developer with experience across multiple domains and technologies. With a strong passion for building scalable and efficient solutions, I have successfully led and developed complex systems from end to end. Throughout my career, I have worked on diverse projects, including: Centintell – My longest engagement, where I built advanced features such as waiting rooms, multi-video calling, scheduling, DialogOne and Athena sync algorithms, modules, subdomains, cloned users, and more. My role was Full-Stack Developer, specializing in Bootstrap and Ruby on Rails. Allegiant Airlines – Developed a price calculator algorithm for the bag change feature and contributed to other modules. Worked as a PHP and Java Developer. Timesheets for ERP – Built a calendar UI while working as an Angular, LoopBack, and Express.js Developer. Neyo – Designed and implemented powerful algorithms, including sync, matchmaking, basketing, segmentation, and query builders, collaborating with remote part-time developers to build it from scratch. WeInvest – Developed the Order Management System, the backbone of the platform, introduced the Organizer to streamline stock buy/sell orders, and built the Price Balance Tower around the Optimizer to support multi-currency orders. Also implemented Factory Bots for RSpec upgrades and algorithm enhancements. I thrive on solving complex challenges and building innovative solutions. My ability to work across the full technology stack, combined with my strong work ethic and adaptability, allows me to take on new challenges with confidence. I am always eager to explore new opportunities and push the boundaries of technology to create impactful solutions.

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