Hire mid-level Ruby on Rails developers

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.

Hey there! I'm an experienced software developer with a strong background in Ruby on Rails, Hotwire (including Turbo, Stimulus, and Turbo Native), Jumpstart Pro, APIs, Postgres, Tailwind. I'm really passionate about crafting high-quality, efficient, and user-friendly applications. Recently, I had the pleasure of working with inkwire.co, where we developed cross-platform applications using Turbo Native. We optimized high-traffic pages, reducing load times by ~80%, we improved database performance through query optimization, task offloading, caching, and refactoring model associations. I also collaborated with collide.app on a contract basis, where we developed a cross-platform application using Ruby on Rails and Turbo Native (Jumpstart Pro). We implemented intuitive UI/UX designs using Tailwind CSS, ensuring a seamless and visually appealing user experience. Prior to these contract roles, I worked with oblsk.com, where we contributed to remarkable projects like plt4m.com. We solved user stories end to end, conducting testing (Mini & Capy), and implementing responsive CSS (Tailwind). Another notable project was haymakersforhope.org, where we integrated a Strapi API for a headless CMS and designed a responsive interface using Tailwind too. In my spare time, I'm dedicated to giving back to the community through organizations like Ruby for Good. I've actively participated in their CASA project, assisting with both small and large issue resolution. Collaborating with like-minded individuals to make a positive impact is truly fulfilling. I consider myself on being resilient, resourceful, and emotionally intelligent. I possess strong communication skills and always strive to deliver on time. 🇺🇸 English - Professional 🇲🇽 Spanish - Native CASA project: https://github.com/rubyforgood/casa/commits/main/?author=dominiclizarraga Personal blog: https://github.com/dominiclizarraga Resume: https://standardresume.co/r/YcQ-LtWoMGJlQFJz4IvH5

Hi, I am a Software Engineer with 6+ years of experience in the tech industry. Highly skilled in Ruby on Rails, Node.js, JavaScript and React. Here's why I'm a strong fit: • Proven work experience as a Ruby on Rails developer, showcasing proficiency in Ruby programming language, front-end technologies like JavaScript, HTML, CSS, and experience with web services such as RESTful APIs. • Experience in directing software system testing and validation procedures, reviewing and modifying existing software to correct errors, upgrade interfaces, and enhance performance. • Exceptional problem-solving skills with a focus on creating secure, reliable, scalable, and maintainable solutions while understanding the tradeoffs involved. • Eagerness to contribute to and maintain a consistent codebase, reflecting a commitment to code quality, maintainability, and team collaboration. • A positive attitude towards challenges and a proactive approach to problem-solving, ensuring a constructive and collaborative work environment.

Hi, I'm Mwala and I love building for the web. I have been writing rails programs since 2022 and I have been hooked to this framework ever since. Rails really brings out the creative in me what people online call the developer brain. The framework's full-stack experience is one I have really enjoyed especially when you integrate Hotwire 🔥. I used django before and had a good experience with it won't lie. I have also done so work with Gin with go-lang and React just for the frontend(that what it should be used for). I have done some game development in the past and computer vision work, it was an exciting time. Game dev is something I might go back. Okay, I don't spend all my time on development, I try my best to stay in shape, football (soccer) being my go to sport. I really like watching and playing the sport. I think If I wasn't a developer I would have been playing football professional 😎. I have gotten into the habit of watching the UFC and motorsports, F1 to be specific and tennis, man I wish I knew how good this game was.

My professional career began in 2019 as a Ruby on Rails developer. Since then, I've honed my skills in Ruby on Rails, API integrations, and full-stack development, primarily building e-commerce platforms. The business challenges I encountered in client meetings always pushed me to provide scalable and efficient solutions. One of my proudest accomplishments was working on a large-scale project with 200+ e-commerce clients. My contributions were recognized, and I was promoted to Software Engineer, where I also mentored new team members on the project and Ruby on Rails. I'm passionate about delivering clean, optimized code and always eager to learn new technologies. Recently, I've been diving into API design patterns and exploring AWS services to improve application scalability. My ability to collaborate across teams, adapt to new tools, and consistently deliver high-quality solutions makes me not just a developer, but a problem solver who thrives in fast-paced environments. Apart from coding, I'm also an artist who loves to paint with different mediums. I believe that my artistic skills help enhance my imagination power, creativity, and concentration, which directly contribute to my problem-solving approach in development. I'm excited to bring my technical skills, attention to detail, and passion for building impactful applications to a team that values innovation and customer success. Skills: Programming Languages: Ruby, Python, C#, Java, JavaScript, Go, PowerShell, jQuery, C++ Frameworks and Tools: Ruby on Rails, Ansible, Terraform, Jenkins, RESTful API, AJAX,React, Visual Studio Code, GitHub, GitLab, Jira, Eclipse Databases: MySQL, Oracle, MongoDB Development Practices: CI/CD Techniques, Unit Testing (RSpec, MiniTest), Automated Testing, Linting Techniques, Code Coverage Best Practices Agile Methodologies: Agile Scrum Frameworks, Scaled Agile Framework Data Structures & Algorithms

With over 16 years of professional Ruby on Rails experience and leadership at companies like Shopify, Apple, Intuit, as well as successful startups, I bring extensive knowledge, with a reputation for delivering high quality code and value to the teams I am a part of. I've led teams on large-scale systems and have a proven track record of successful cross-organizational collaboration. My focus has always been on creating sustainable growth, both for the systems I work on and for the teams I lead. My leadership approach is deeply rooted in empathy and shared code ownership. I continuously strive for code quality and maintainability, while always balancing the business outcomes. I'm very comfortable with: - MiniTest & Rspec - Haml 🤗 - Hotwire - Stimulus - Turbo - Bootstrap - TailwindCSS & Tailwind UI - View Component - Caching - Queuing - Mentoring - AWS - PostgreSQL I believe in the monolith. <3

From the moment I wrote my first lines of code, I was drawn to the power of solving real-world problems through technology. Over the past 9+ years, I’ve honed my expertise in Ruby on Rails, Node.js, Python, Go, and React, building scalable, high-performance applications across FinTech, SaaS, and Healthcare industries. My passion lies in crafting robust backend systems, secure APIs, and seamless front-end experiences, all while optimizing for performance and maintainability. One of my proudest achievements was leading the migration of a monolithic Rails application to a microservices-based architecture using Go, Node.js, and GraphQL. By carefully refactoring services, implementing event-driven patterns with Kafka, and optimizing database queries, we cut response times by 60% and improved system reliability. This experience reinforced my belief that understanding the trade-offs of different technologies is key to building resilient applications. Beyond writing code, I thrive on mentoring engineers, leading technical discussions, and driving best practices in CI/CD, cloud-native development (AWS, Kubernetes, Terraform), and DevOps automation. I love tackling complex authentication challenges (OAuth, JWT, SAML) and designing secure, scalable APIs that empower businesses to move faster. At my core, I’m an engineer who bridges the gap between backend, frontend, and infrastructure—someone who doesn’t just build software but also optimizes it, secures it, and scales it. Whether it's refactoring legacy Rails applications, designing real-time systems with WebSockets, or deploying Go-based microservices, I bring a holistic, problem-solving mindset to every project.

I'm a results-driven software engineer who loves building scalable, high-performance applications with Ruby on Rails. At Gig Wage, I focused on API integrations, performance tuning, and internal tooling, helping to scale the platform and make processes more efficient. I enjoy tackling complex problems, refactoring legacy code, optimizing database performance, and implementing best practices for maintainability and security. My expertise includes: ✔ Ruby on Rails (RESTful APIs, Grape API, Sidekiq) ✔ Database Optimization (PostgreSQL, SQL, indexing, query performance) ✔ Background Jobs & Scalability (Sidekiq, Redis, RabbitMQ) ✔ Authentication & Security (Devise, OAuth, JWT) ✔ Frontend & UX (React, Vue.js, JavaScript, ViewComponents) ✔ Testing & QA ✔ Cloud & DevOps (Docker, AWS, CI/CD, Rollbar)

Hi there! I am an experienced Ruby on Rails developer. I am an immediate joiner. I love new challenges and meeting new people. I am comfortable with both remote and onsite with relocation assistance.

I'm a self-taught Rails developer and creator of Membership System Pro, a Ruby on Rails gym management software, designed for nimble businesses. I initially built it as a labour of love for my partner’s fitness business. A Pilates studio owner had a positive experience with the software as a visitor to my partner’s studio. She reached out to me to implement it for her own business and soon became my second (and first paying!) client. Selling services to a second client required me to draw on my broader business experience from my first career as a consultant. I communicated openly with the client to assess requirements and provided a formal contract to document specification, charges and delivery. On the technical side, I particularly enjoyed implementing a bespoke solution for a tricky membership policy the client had, where certain members had priority booking rights over certain classes. Membership System Pro will remain a side project that I am keen to improve and expand use of, however, now, I'm eager to join a small, passionate team working on something interesting—where I can contribute, learn, and grow alongside other developers. Core Technical Competencies Ruby/Rails API Integration (Twilio for WhatsApp/ Razorpay for payments) Hotwire and Stimulus Bootstrap Testing JavaScript Heroku