Hire c-level Ruby on Rails developers

With 15+ years in software development, I specialize in crafting scalable, high-performance web applications using Ruby on Rails, Hotwire, and Kamal. My expertise extends beyond development. I connect developers, leadership, DevOps, and security, ensuring seamless collaboration, robust architectures, and optimized performance. Over the years, I’ve worn many hats, from Tech Lead Software Engineer and Senior Staff Engineer to Management Consultant and Lecturer at HTW Berlin. These roles have shaped my ability to build strong engineering teams, mentor developers, and drive innovation while maintaining a hands-on approach to solving technical challenges. 💡 What sets me apart? Full-Stack Expertise: Rails, Hotwire (Turbo & Stimulus), PostgreSQL, and Elasticsearch Cloud & DevOps: Kamal, Docker, Terraform, AWS, and zero-downtime deployments Performance & Security: Scaling applications, optimizing databases, and securing web apps Leadership & Mentorship: Guiding engineering teams and fostering a culture of innovation I thrive on solving complex challenges, optimizing workflows, and building future-proof applications. Whether leading teams, consulting on architecture, or automating cloud deployments, I’m driven by a passion for efficiency, innovation, and delivering high-quality software solutions. Let’s connect and build something exceptional! 🚀

Seasoned Rails consultant with 8+ years of experience. From MVPs to products with millions of users. Self-driven and easy to manage. I can provide up to 6 hours of overlap with the US timezone and full overlap with EU/UK time zones. Remote: Global, OnSite: India/Middle East/Asia. Some Interesting Complex Problems Solved AI integrations using voice models, openAI, and random forests. Video/audio freeze detection: Used openCV to detect if a video is in a frozen state with more than 99% accuracy CoBrowsing: Created CoBrowsing feature for a customer service app that allows to take control of a customer's browser without using any plugins except this JS CoBrowsing widget code. Server management platform: An internal dashboard for a client that allows users to control thousands of servers and field devices scattered across the globe. It allows the users to execute scripts on those servers, configure, provision, web-based SSH, etc. Common Freelance Gigs Performance optimizations of Rails, PostgreSQL, and Sidekiq: Helped multiple clients to scale Rails Upgrades Legacy modernization: Helping legacy Rails applications to modernize the stack, including the front end. For example, Recently, I helped convert CoffeeScript/AngularJS 1.0 to JS/Vue. Third-party integrations. Skills: Ruby on Rails PostgreSQL React Stimulus TypeScript JavaScript GraphQL Server - Ruby GraphQL Client - Apollo CI/CD (CircleCI, Jenkins) Heroku

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.

As a developer with over 7 years of experience, my journey began with a curiosity for how technology can be harnessed to solve real-world problems. Early on, I was drawn to full-stack development because of the opportunity to work across the entire application lifecycle. My expertise lies in Ruby on Rails, ReactJS, and React Native, but my passion for learning has driven me to continually expand my skill set with technologies like GO, NextJS, Node.js, and Python. One of my recent accomplishments was leading the development of a mobile app that streamlined a complex insurance process. By integrating APIs, building a custom voucher system, and enhancing the user interface, I not only improved the user experience but also contributed to a 10% increase in sales. This project reinforced my belief in the power of well-crafted software to drive business success. What sets me apart as a developer is my focus on problem-solving and scalability. I thrive on dissecting complex issues, whether it's improving performance by optimizing code or implementing a solution that scales seamlessly. I’m passionate about helping businesses grow through technology, and I pride myself on my ability to adapt quickly, learn new tools, and apply them to solve unique challenges. Above all, I am committed to building high-quality, impactful software that not only meets the needs of users but also drives meaningful results for the businesses I collaborate with. Whether it’s developing from scratch, maintaining existing projects, or testing new ideas with an MVP, I bring a versatile and solutions-driven mindset to every challenge.

As an accomplished senior Full Stack developer with 9 years of mastery in Ruby on Rails and Single Page Application (SPA) development using React, Vue.

I'm Matt Lins, and I have an extensive 18-year background in web development, specializing in Ruby on Rails. I've applied my craft to build scalable E-commerce, Healthcare, Proptech, and iGaming sites. Along the way, I've led engineering teams to achieve company exits, and in doing so, I've learned that the most sustainable code and tech solutions emerge from the pursuit of simplicity. I advocate for simplicity in development - a belief deeply rooted in the principles of Gall's Law, which I see as essential for creating solutions that focus more on business value than technical complexity.

Practicing engineer for 30 years. Web Dev for the past 15 with Rails. Also: C, C++, C#, Ruby. linux command-line, Python, database architectures, microservices, team manamagent. I love to help teams in a variety of ways: Pairing/mentoring with junior developers to help them level-up Workshops for teams to increase their classic Computer Science knowledge Working with C-Suite executives on strategic planning, resources allocation, and technical roadmaps I actively teach in the Masters Program for Computer Science at the University of Chicago. I also run Software for Research, a platform for clinical research at academic institutions. I have a long-time hobby in the Learning Sciences and love to help teams "learn how to learn"

What makes me unique as a developer is the blend of purpose, adaptability, and real-world impact that drives my work. I didn’t get into software development simply to build cool apps — I started coding to solve problems that matter to people. From streamlining administrative systems for local government in Zimbabwe to creating an online marketplace that helps small businesses sell car parts more effectively, my projects are always rooted in tangible value and usability. One of my recent accomplishments is developing a digital change-of-use permit system for Harare City Council using Ruby on Rails. What makes this special isn’t just the tech stack — it’s the fact that I took a bureaucratic, paper-heavy process and transformed it into something efficient, trackable, and accessible. It’s a small but meaningful contribution toward digital transformation in a context where it's needed most. I’m passionate about building platforms that empower communities, particularly in underserved markets. Whether it’s launching PartsToGo, a growing car parts marketplace in Zimbabwe, or conceptualizing platforms like TendersZimbabwe, I love taking on the kind of challenges where impact matters more than hype. I bring not only the technical skills — full-stack development, systems thinking, clean and maintainable code — but also a strong sense of empathy and purpose to every line I write. I thrive where others may hesitate: limited resources, unclear paths, and bold ideas. My strength lies in turning vision into product, especially when the goal is to make life easier, more efficient, and more just for real people.

Hello! I’ve been a professional Software Engineer for 10+ years and started working with Rails in 2014. I have a lot of experience working for early stage startups and wearing many hats. Most recently, as the first full-time employee and VP of Engineering, I was instrumental in the growth of a startup to over $10M ARR in 5 years with an engineering team of two. This led to an acquisition where I served as the point of contact for the technical due diligence process. I’m detail-oriented and value pragmatism, communication, and simplicity. I’m currently open to part-time and full-time consulting opportunities. How I can help (a non-inclusive list): Feature development Architecture review & planning Performance monitoring & improvements Technical interviews & evaluation Ruby on Rails & Database performance Code review Code refactoring with recorded Loom videos to show why Please reach out if you’re interested in working together!

💭 Do you have an idea that makes sense in theory, but you haven't gotten it beyond that point? An existing team that could use some direction? Perhaps a product that you've gotten to market, but you're finding it harder to add more and more customized features and keep it performing the way it should? 👋 For a little over a decade now, I've been building clean, maintainable, applications for everything from cyber security, high traffic (millions of transactions per day), credit products, custom learning platforms, to custom storefronts. 🤖 I take a pragmatic approach to development, I'll hear you out, ask some pointed questions along the way, give targeted feedback, and rinse and repeat until we've got a clear vision for your product. You'll be able to give feedback on quick builds that are put together in days / weeks rather than months. This process is called prototyping. 🏆 Prototypes are great, but they won't take into account all the nuances needed for a product to start serving customers, so from there we'll have a conversation about what your "must haves" are in order to get a product in front of customers. Anything that you'd like but isn't a "must" will be outside the scope. This step is where we build an MVP (minimum viable product). The goal here is to get your product to market as fast as possible. Paying customers are the best source of feedback you can get, but we need an MVP to get them in the system. From there we work on the features that you and your customers want most. I'll always give you straight talk on what options you have for various features, and steer you toward the most practical technology choices to handle the functionality you want, while also working within your budget. Core Services build a prototype or MVP jump into an existing application and work through a hard to build feature, or difficult bug improve the performance of your existing application improve your authentication layer (add popular authentication providers and protocols) improve your application security (evaluate and fix security holes, work through security questionnaires your clients send you) begin accepting payments in your application make your application mobile friendly (either using responsive / progressive design techniques or with a full fledged mobile app) give feedback on and improve your existing design Have an existing product? I specialize in performance enhancements to a product that feels a bit sluggish, as well as ensuring you can handle an expected jump in traffic pragmatic AI architecture. If you're not sure where to get started, I've already built out several multi-agent AI driven tool sets that go beyond having a context driven interaction with customers, and instead allow customers to handle complex tasks through text messaging and voice. Rails upgrades team augmentation