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CTO | Engineering Management | Rails developer (12+ years) | Sidekiq | RabbitMQ | Hotwire, Stimulus and Turbo | AWS | GCP | Terraform

I’m a Rails developer with over 12 years of experience in software development, including 10+ years working hands-on with Ruby on Rails. Along the way, I’ve built all kinds of applications—automation tools, ERPs, inventory management systems, insurtech platforms, social media apps, and even AI-integrated solutions. I’ve always focused on creating large-scale, high-performance apps that can handle thousands of concurrent records without breaking a sweat. I’ve worked with both SQL (PostgreSQL, MySQL) and NoSQL (MongoDB) databases, making sure they’re set up for speed and scalability. On the backend, I’m well-versed in Sidekiq and RabbitMQ for background processing, and on the frontend, I use tools like Hotwire, Turbo, and Stimulus to make apps fast and interactive. When it comes to deployment, I’ve got plenty of experience with Google Cloud, AWS, and Fly.io, which lets me build infrastructure that’s as reliable as it is scalable. The recent apps I've developed have included AI integration with OpenAI and Anthropic APIs. At present, I'm also setting up an internal LLM for speeding up software development. What makes me stand out? I code fast. Really fast. I’m great at taking an idea from zero to a fully functioning app in just days, without cutting corners on quality. Having worked in Asia and Europe, I’ve learned how to adapt to different clients and challenges, which helps me deliver exactly what’s needed, every time. Recently, I co-founded my own software consulting firm, where I get to use my skills and experience to help businesses grow and succeed. Outside of coding, I’m passionate about dogs, I love solving crosswords, and I’m a bit of a political nerd. These hobbies keep my mind sharp and my creativity flowing, which is probably why I enjoy tackling complex coding challenges. I know Ruby and Rails inside out, and I thrive on turning big ideas into reality—quickly and efficiently. If you need someone who can hit the ground running and deliver results, I’m your developer.

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Rails Consultant with AI experience

High response rate

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

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💪Have 9 Years in Ruby On Rails with 3+ years of Managing teams, have also worked as a CTO of a Startup that got Funded after that.

💪Have 9 Years in Ruby On Rails with 3+ years of Managing teams, have also worked as a CTO of a Startup that got Funded after that. Extra Experience with Large Language Models: • Open AI - Fine-Tuning • Open AI - Embedding (Search, Clustering, Recommendations, Anomaly detection, Diversity measurement, Classification) • Open AI - APIs. • Vector databases - Pinecone, PGvector • Langchain and LlamaIndex • Hotwire, Turbo and Stimulus JS • Creating Scalable applications with Database Architecture • Setting Server and Language side Securities. • Dispatch Optimisation Model - Maps • Action Cable • GraphQL • Docker Images, Containers, Volume, Compose, etc • JWT tokens • RSpec in BDD and TDD environments • Optimising APIs • Implement Libraries and data storage solutions • Identify bugs and propose an efficient solution • Managing Teams 💪Experience on 3rd party Integrations: • Payment gateway : Stripe Connect, PayPal, Square, Paytm, RazerPay, PayU, Payfort, Paytabs, Hyperpay, few local African payments Gateways, Mobile App- Orange-Vodafone (Congo) etc • Insurance APIs: Medgulf, UBI, Taunia • Government APIs: ELM, Yakeen, WASL, CITC • Identity Verification APIs: ELM & Yakeen • Google APIs: Maps, Firebase • SMS Gateways: Twilio, Firebase, Unifonic, etc 💪Extended Experience on : • Action Cable, • Testing Gems, • GraphQL • Security Gems, etc • Hotwire, Turbo and Stimulus JS 💪Have experience on AWS: • EC2 Service and EC2 Instances • EC2 and ELB for AWS Architects • Elastic Beanstalk • Lambdas and API Gateway • with VPC and Subnet • S3 • ElastiCache • SQS, SNS, and MQ • CloudFront • Route 53 • DevOps, etc 💪Testing Gems: 🌟Rspec (mainly) ⭐Factory_girl ⭐cucumber-rails ⭐Capybara 🏆Code Documentations: Confluence Tools to project/ticket management — Trello/Asana/Pivotal/Github, etc Industries i have worked with: ✅Real Estate ✅Fintech ✅Law and Logistics ✅Health & Fitness ✅Edtech ✅E-Commerce ✅Retail ✅E-Game ✅Saloon and SPA Instead, let's jump on an 😎 Initial 10-minute call so we can cover your project and decide how my development skillset will work best for you and your project. 🥇What extra we can give for the project: 😎We have 100 Devs in these languages and designers with Devops, AI and ML 🏆Please check on Github with Account : TecOrb Technologies 😎What Skills we can offer: ✅ Front-end: Javascript, Typescript, Angular, React.js, Bootstrap, Tailwind CSS. ✅ Back-end: Node.js, Python, Ruby. ✅ Database: MySQL, PostgreSQL, MongoDB, Redis, Elasticsearch. ✅ Mobile: Swift, Java android, Kotlin, Dart “Flutter." ✅ CMS: Wordpress. ✅ UX/UI: Adobe XD, Figma. ✅ Devops ✅ AI and ML

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Senior Software Engineer | Ruby On Rails | Golang | Fullstack Developer | Devops

I'm an accomplished software engineer with an expansive background spanning over eight years, dedicated to devising innovative solutions that enrich people's lives. My expertise revolves around optimizing processes, amplifying efficiency, and untangling complex problems within web development, focusing on Ruby on Rails, GoLang, Next.js, and JavaScript. My journey in software development has empowered me to shepherd intricate projects from conception to realization. Proficient in technologies such as Kubernetes, AWS, and Docker, I specialize in crafting and deploying scalable solutions, leveraging a robust foundation in software development. My project portfolio spans diverse sectors, including healthcare, ecommerce, fleet and car rental management, telecom, oil & propane, and insurance. This breadth of experience has honed my adaptability, enabling me to excel in diverse project landscapes. Presently, I'm immersed in backend engineering for a dynamic fleet management system. My toolkit encompasses languages like Ruby, Golang, and Next.js, enabling me to engineer seamless user experiences. Driven by an insatiable thirst for knowledge, I relentlessly seek avenues to expand my skill set and remain abreast of cutting-edge technologies. My goal is to channel my expertise into effecting tangible and positive changes in the world. Skills: Proficient in Ruby on Rails, Go, SQL, NoSQL, Redis, RabbitMQ, and well-versed in front-end technologies including HTML, CSS, React, and Next.js.

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Full-Stack Ruby on Rails & React Developer | Passionate About Scalable & User-Friendly Applications

Amaan Tazak Full-Stack Ruby on Rails & React Developer. I’m Amaan Tazak, a passionate Full-Stack Developer with expertise in Ruby on Rails and React, based in Indore, Madhya Pradesh. My journey into software development began with a curiosity for building things that solve real-world problems, and over time, I’ve honed my skills in crafting scalable, user-friendly applications. What Makes Me Unique? -- Backend Mastery: I specialize in Rails API development, handling everything from database design to authentication (JWT, Devise) and performance optimization with PostgreSQL, Redis, and Sidekiq. I love building RESTful and GraphQL APIs that power modern web apps. -- Front-End Expertise: I bring dynamic user experiences to life using React, Next.js, Tailwind CSS, and Redux Toolkit. I believe in writing clean, reusable components and leveraging state management efficiently to create fast, interactive applications. -- Bridging the Gap Between Backend & Frontend: Many developers focus on either backend or frontend, but I thrive in both worlds. I build seamless full-stack applications, integrating Rails APIs with React frontends for smooth user interactions. What Drives Me? I’m passionate about problem-solving, clean code, and scalability. Whether it’s optimizing a database query, improving API response times, or implementing a responsive UI, I enjoy refining the details that make an app shine. How Can I Help? 🚀 Need a high-performance Rails API backend? I’ve got you covered. 🚀 Looking for a modern React frontend? I can build it. 🚀 Want to deploy a full-stack app with CI/CD? I can set it up on Render, Fly.io, Vercel, or AWS. I’m always excited to collaborate on meaningful projects, contribute to open source, and stay on top of the latest in Rails and React development. Let’s build something amazing together!

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I enjoy expressing my ideas through code that is easy and pleasing to read.

Lucas Fernandes, 31, SP - Brazil Lucas who? Well, I'm Lucas, I'm 31 years old, I live in São Paulo, Brazil, with my girlfriend, and I have a degree in Information Systems. Outside of work, I enjoy cycling and drawing quite a bit. I began my career in technology back in college, working as a tester, as QA. In my first job, I was mainly responsible for creating and reviewing software testing documents, such as performance testing strategy documents. Additionally, I started creating performance testing scripts. Working with those testing scripts it's when I saw an opportunity because since I started my studies, my goal was to become a programmer. While working as QA, I found that working with writing automated test scripts was a good way to keep myself closer to the code itself. After my first company, I joined Inmetrics. At Inmetrics, my focus was on creating, reviewing, and executing automated test scripts for Android and iOS applications using the Ruby language. With the experience I gained at Inmetrics, I felt comfortable enough to start looking for a programmer position. Since then, I've been working as back-end developer using technologies such as Ruby on Rails, RSpec, Docker, Git/Github, MySQL, Postman, CodeFresh, PostgreSQL, MongoDB, RabbitMQ, Redis and SCRUM and Kanban as methodologies. What are my unique skills? Although I believe API development wasn't my primary focus, in my last three positions, I gained considerable experience in it. Specifically, my responsibilities included integrating partners through the API, developing new endpoints and webhooks, maintaining API endpoints, updating API documentation, refactoring code, performing migrations of new columns and tables, publishing client libraries for other API versions, reviewing business models for new features, performing translations, and writing some queries. Additionally, I was responsible for writing tests and monitoring them after deployment to production, essentially covering the entire development lifecycle. What Lucas DON’T you want to work on? There's nothing specific that I don't want to work on. I want to work in a place where I can feel comfortable advancing my development as a developer and participating in projects that involve more advanced subjects, as I believe I still have a lot to learn. Therefore, I'm seeking a company with flexible and collaborative people. If I feel that the position doesn't align with that, it's not a place I want to work. How would I describe my style of coding? I enjoy expressing my ideas through code, or at least I try to, that is easy and pleasing to read. I believe code should be easy and pleasing to read, guiding you through its abstractions to understand what's happening without much effort instead of you try hard to connect the pieces. I value expressiveness, for example, ensuring that objects or methods serve a single purpose, abstract code that has been duplicated and naming things with meaningful names. The Rails community is well-known for this, but I also emphasize the importance of writing tests, as they provide peace of mind when changing code. My experience with APIs tells me that I also appreciate clear and well-documented APIs that are easy to use. What have I been doing lately? Currently, I think I've been trying to balance my days around these three things lately: studying programming, improving my drawing skills, and cycling. I think it's worth mentioning that I view these activities outside of work positively because they put me in contact with other people and each one brings a different feeling. And, of course, this also reflects positively on my work. Currently area of study As of now, I have been studying JavaScript and delving into some backend topics. I have been using roadmap.sh/backend to guide myself through this process, and I've been posting my JavaScript code at: https://github.com/lsfernandes92/studi3s/tree/master/JavaScript.

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