𝟳+ 𝗬𝗲𝗮𝗿𝘀 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 | 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 • 𝗦𝗮𝗮𝗦 • 𝗔𝗣𝗜𝘀 • 𝗘𝗥𝗣/𝗖𝗥𝗠 • 𝗔𝗜 • 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 I help organizations build secure, scalable web and mobile applications while identifying and mitigating security risks through 𝗮𝘂𝘁𝗵𝗼𝗿𝗶𝘇𝗲𝗱 𝘀𝗲𝗰𝘂𝗿𝗶𝘁𝘆 𝗮𝘀𝘀𝗲𝘀𝘀𝗺𝗲𝗻𝘁𝘀 My background combines professional software engineering with application security, allowing me to understand both how applications are built and how they should be tested. I have experience developing and securing 𝗦𝗮𝗮𝗦 𝗽𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀, 𝗘𝗥𝗣 𝘀𝘆𝘀𝘁𝗲𝗺𝘀, 𝗖𝗥𝗠 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀, 𝗥𝗘𝗦𝗧 𝗔𝗣𝗜𝘀, 𝗔𝗜-𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀, 𝗮𝗻𝗱 𝗲𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲 𝘀𝗼𝗳𝘁𝘄𝗮𝗿𝗲 using Ruby on Rails, React, Python, and modern cloud technologies. 𝗖𝘆𝗯𝗲𝗿𝘀𝗲𝗰𝘂𝗿𝗶𝘁𝘆 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 * Web Application Penetration Testing * Mobile Application Penetration Testing (Android) * API Security Testing * OWASP Top 10 & OWASP API Security * OWASP Mobile Security Testing * Authentication & Authorization Testing * Session Management & Access Control Testing * Business Logic Testing * Static & Dynamic Application Security Testing (SAST/DAST) * HTTP/HTTPS Traffic Analysis * Reverse Proxy Engineering * MITM Proxy Development (Authorized Research) * TLS/SSL & Certificate Analysis * Reverse Engineering & APK Analysis * Secure SDLC * Security Reporting & Remediation Guidance 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 * Ruby on Rails (Rails 7/8) * Python Automation & Security Scripting * React.js, Next.js, TypeScript * REST APIs & GraphQL * PostgreSQL, MySQL, MongoDB, Redis * Sidekiq, Docker, AWS, Heroku * Devise, JWT, OAuth, Pundit * RSpec & Automated Testing * Performance Optimization * CI/CD 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 & 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 𝗧𝗼𝗼𝗹𝘀 * Burp Suite * Python * Ruby * Selenium * Playwright * Scrapy * Puppeteer * OpenSSL * WEBrick * Git * Linux * HTTP/HTTPS Protocol Analysis * API Testing * Browser Automation * Traffic Inspection * Web Scraping & Data Extraction 𝗔𝗜-𝗔𝘀𝘀𝗶𝘀𝘁𝗲𝗱 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 I use Cursor, ChatGPT, Claude, GitHub Copilot, and other LLM-powered development tools to accelerate delivery, automate repetitive tasks, improve code quality, and build production-ready software efficiently. My combination of software engineering and cybersecurity enables me to secure applications throughout the development lifecycle—from architecture and implementation to authorized penetration testing and remediation. Whether you need a secure SaaS platform, ERP/CRM system, API development, automation, or an application security assessment, I can deliver reliable, maintainable, and security-focused solutions.

As an experienced Ruby on Rails engineer with 6 years in the industry, I am passionate about creating scalable and maintainable web applications. With a strong grasp of programming concepts and principles, I easily adapt to new technologies and tools. I take pride in writing clean, efficient code and enjoy collaborating to solve complex problems. Eager to embrace new challenges, I am keen to further advance my career in software development.

Are you looking for a battle-tested Senior Full-Stack Developer to architect modern, scalable, and high-performance applications? With a proven track record spanning over 8 years of professional engineering, I specialize in building production-grade software from scratch, rescuing legacy codebases, and integrating cutting-edge AI capabilities. From Y Combinator-backed startups to enterprise-level ERP providers across the US, UK, and Germany, I don't just write code—I design future-proof, self-healing architectures that solve complex business challenges in Fintech, Logistics, E-Commerce, and HealthTech. 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 𝐈 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 → Languages: Ruby · JavaScript / TypeScript · Python → Backend: Ruby on Rails · Node.js (Express.js, NestJS) · Sidekiq · Kafka · RabbitMQ · BullMQ · WebSockets → Frontend: React.js · Next.js · Vue.js · Angular · Redux · Tailwind CSS · Material UI → APIs & Integrations: RESTful APIs · GraphQL · Third-Party Integrations → Databases & Search: PostgreSQL · MySQL · MongoDB · Redis · Elasticsearch · DynamoDB · Firebase → Cloud & DevOps: AWS (EC2, S3, RDS, Lambda, EventBridge) · Docker · GitHub Actions · CI/CD · Heroku · DigitalOcean · 𝗪𝗵𝗮𝘁 𝗪𝗼𝗿𝗸𝗶𝗻𝗴 𝗪𝗶𝘁𝗵 𝗠𝗲 𝗔𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝗟𝗼𝗼𝗸𝘀 𝗟𝗶𝗸𝗲 → Built to Scale: I design architectures that seamlessly handle a 5x surge in traffic and data load, ensuring your software grows alongside your business without requiring costly code changes. → End-to-End Ownership: From complex database modeling to high-fidelity frontend execution, I manage the full lifecycle, eliminating the need to coordinate multiple specialists. → Agile Communication: I maintain a proactive, transparent feedback loop, giving you complete visibility into milestones, blockers, and code deployment. → On-Time, On-Budget Handoffs: My development process is optimized for efficiency, ensuring predictable delivery timelines and highly customized product features. → Pragmatic, Data-Driven Thinking: I look at your product through a commercial lens, ensuring every architectural decision supports your user retention and business goals. → Zero Technical Debt: Through strict code reviews, modular engineering patterns, and comprehensive unit testing, I deliver a clean codebase that your team can easily scale. Let’s connect to build an agile, transparent partnership focused on clean code, predictable delivery, and long-term product success.

7 years of Ruby on Rails fullstack (front-end, back-end and deployment) experience. 7 years deploying on the cloud (AWS, Azure, Digital Ocean, Heroku) 2 years Rust experience. AWS Certified DevOps Engineer - Professional Certified Kubernetes Administrator (CKA) Hashicorp Certified - Terraform Associate 003 I'm 100% committed to achieve success in your web applications with the results to prove it. Previous project work includes: ● Setting up 1-to-1 voice conferences using Twilio API ● Custom 2 factor authentication implementation ● Uploading and storing data on S3 and B2 buckets ● Automated web crawling to monitor new legislation ● Custom cron jobs on Linux servers for backup and maintenance tasks ● Solving "impossible" problems with custom Ruby gem and Rails patches ● Mass marketing sms campaigns using Twilio API ● Complex custom subscription implementation with Stripe API Technology I work with: ● Ruby on Rails (RoR). Rails 4, 5, 6, 7. ● Hotwire/Turbo ● RSpec/Capybara/Selenium for unit testing and feature testing ● PostgresDB, Mysql ● Heroku, Digital Ocean, AWS EC2 servers ● Heroku staging apps for continuous integration (CI/CD) ● Twilio API, Stripe API ● Google/Facebook/LinkedIn OAuth ● Capistrano, Docker+Kubernetes for deployment ● Wordpress, Shopify ● HTM5L/CSS3 ● JavaScript/AJAX/JQuery/JSON ● ReactJs/Nodejs/Typescript ● Web Scraping ● Linux BASH scripting ● Git, GitHub, Bitbucket, ● Webhooks ● Performance enhancement via algorithm and query optimization I understand the importance of test driven development to ensure a product that is understandable and maintainable for future developers to work on. More time put in up front means far less costs down the road. Fluent in English. Born and raised in the USA.

Senior Full-Stack Engineer specializing in Ruby on Rails backends with AI/LLM integrations. 10+ years of experience helping startups, SaaS companies, and agencies ship fast, scale cleanly, and add AI features that actually work in production. 🧩 What I Build 🔹 Rails + Next.js SaaS platforms — from MVP to scale 🔹 LLM-powered features — chatbots, RAG pipelines, AI agents, smart search 🔹 High-performance APIs, real-time systems, and clean microservice architectures 🔹 AWS deployments with CI/CD, Docker, and zero-downtime rollouts 🛠 Core Stack Ruby on Rails · Next.js · Node.js · Python/FastAPI · PostgreSQL · AWS · OpenAI (GPT-4 / 4o) · Docker 🏆 Why Clients Work With Me ✅ Top Rated Plus with 100% Job Success ✅ Clear communication, daily updates, no surprises ✅ Senior-level architecture decisions, not just code delivery ✅ I ship on time and explain trade-offs honestly If you're building an MVP, scaling a funded product, or adding AI to an existing SaaS — let's talk.

Hi there🙋! I am an experienced web developer with expertise in front-end, back-end, and test-driven development. I hold a BS in Computer Science and have over 3 years of experience in building scalable web applications. I have worked with large startups, groups, and organizations, both individually and as part of a team. My areas of expertise include building and deploying large-scale applications, Ruby on Rails, MERN Stack, Python, Django, test-driven development, continuous integration, Javascript/jQuery, React, and databases like Postgresql, MySql, and MongoDB. I am also skilled in HTML5, Haml, Slim, CSS, bootstrap, and have experience deploying applications on Heroku, AWS, Play Store, and App Store. Additionally, I am proficient in Git, GitHub, and have experience integrating APIs such as social media platforms (Facebook, Twitter, Instagram), payment gateways (Stripe, Paypal), and single sign-on options (Facebook, Outlook, GSuit). I am a detail-oriented individual who believes in rigorous testing (TDD/BDD) and ensuring maximum speed and compatibility for optimized performance. With my skills and expertise, I am confident in my ability to make a valuable contribution to your team.

𝗔𝗿𝗲 𝘆𝗼𝘂 𝘁𝗶𝗿𝗲𝗱 𝗼𝗳 𝘀𝗹𝗼𝘄, 𝗼𝘂𝘁𝗱𝗮𝘁𝗲𝗱 𝘄𝗲𝗯𝘀𝗶𝘁𝗲𝘀 𝘁𝗵𝗮𝘁 𝗳𝗮𝗶𝗹 𝘁𝗼 𝗮𝘁𝘁𝗿𝗮𝗰𝘁 𝗰𝘂𝘀𝘁𝗼𝗺𝗲𝗿𝘀 𝗼𝗿 𝗯𝗿𝗲𝗮𝗸 𝗮𝗰𝗿𝗼𝘀𝘀 𝗱𝗲𝘃𝗶𝗰𝗲𝘀? 𝗗𝗼𝗲𝘀 𝘆𝗼𝘂𝗿 𝗰𝘂𝗿𝗿𝗲𝗻𝘁 𝘀𝘆𝘀𝘁𝗲𝗺 𝗵𝗮𝘃𝗲 𝗺𝗲𝘀𝘀𝘆 𝗰𝗼𝗱𝗲, 𝘂𝗻𝘀𝗲𝗰𝘂𝗿𝗲 𝗮𝗱𝗺𝗶𝗻 𝗽𝗮𝗻𝗲𝗹𝘀, 𝗼𝗿 𝗽𝗼𝗼𝗿 𝗦𝗘𝗢 𝘁𝗵𝗮𝘁 𝗸𝗲𝗲𝗽𝘀 𝘆𝗼𝘂 𝗶𝗻𝘃𝗶𝘀𝗶𝗯𝗹𝗲 𝗼𝗻𝗹𝗶𝗻𝗲? ➡️ 𝗜 𝗵𝗲𝗹𝗽 𝗯𝘂𝘀𝗶𝗻𝗲𝘀𝘀𝗲𝘀 𝗹𝗶𝗸𝗲 𝘆𝗼𝘂 𝗯𝘂𝗶𝗹𝗱 𝗳𝗮𝘀𝘁, 𝘀𝗲𝗰𝘂𝗿𝗲, 𝗮𝗻𝗱 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 𝘄𝗲𝗯 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 𝘁𝗵𝗮𝘁 𝗱𝗿𝗶𝘃𝗲 𝗿𝗲𝘀𝘂𝗹𝘁𝘀 — 𝘄𝗵𝗶𝗹𝗲 𝗳𝗶𝘅𝗶𝗻𝗴 𝘄𝗵𝗮𝘁’𝘀 𝗯𝗿𝗼𝗸𝗲𝗻. 🎯 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 ✔ Full-Stack Web Development ✔ MVP Development & Scaling ✔ API Integration & Backend Architecture ✔ Performance Optimization & Code Refactoring ✔ UI/UX Enhancement & Mobile Responsiveness ✔ Agile Collaboration & Project Delivery 🛠 𝗦𝗸𝗶𝗹𝗹𝘀 & 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 🔹 Frontend: React.js, Vue.js, JavaScript (ES6+), HTML5, CSS3, SCSS, Bootstrap 🔹 Backend: Ruby on Rails, Node.js, Express.js 🔹 Databases: PostgreSQL, MySQL, MongoDB 🔹 Cloud & DevOps: AWS (EC2, Beanstalk, Cognito), GitHub, CI/CD 🔹 Auth & Security: OAuth, JWT, Role-based Access 🔹 Other Tools: Git, Postman, Figma (Dev Handoff), Trello, Jira, Slack 🧰 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 𝗢𝗳𝗳𝗲𝗿𝗲𝗱 ✔ Custom Full-Stack Web Application Development ✔ MVPs for Startups with Rapid Iteration ✔ RESTful APIs & Third-Party Integrations ✔ Legacy Codebase Cleanup and Migration ✔ Cloud Deployment, Monitoring, and Maintenance ✔ Ongoing Feature Development & Bug Fixing ✔ Team Collaboration with Agile Methodologies 🏆 𝗪𝗼𝗿𝗸𝗶𝗻𝗴 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 With 𝟱+ 𝘆𝗲𝗮𝗿𝘀 of hands-on experience, I’ve delivered software solutions for: ➡ Tech startups looking to scale ➡ Agencies needing reliable freelance devs ➡ SaaS platforms with performance issues ➡ E-commerce platforms with high user traffic ➡ Internal enterprise tools with complex data flows 🌐 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 & 𝗗𝗼𝗺𝗮𝗶𝗻𝘀 ✔ SaaS Platforms ✔ Fintech & Payment Gateways ✔ E-commerce & Marketplaces ✔ EdTech & LMS Systems ✔ CRM & Workflow Automation ✔ Healthcare & Patient Portals (HIPAA-aware) ⚙️ 𝗧𝗼𝗼𝗹𝘀 𝗜 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 🔹 VS Code, GitHub, GitLab 🔹 AWS (EC2, S3, Beanstalk, Cognito) 🔹 Docker (basic proficiency) 🔹 Postman & Swagger for API testing 🔹 Figma, Trello, Jira, Slack 🚀 𝗟𝗲𝘁’𝘀 𝗕𝘂𝗶𝗹𝗱 𝗦𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝗧𝗵𝗮𝘁 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝘀 & 𝗦𝗰𝗮𝗹𝗲𝘀! If you're looking for a reliable, detail-oriented, and collaborative full-stack developer who can hit the ground running and deliver production-ready code, let’s connect. I take ownership of every project and commit to high-quality, long-term solutions that grow with your business. 🔗 𝗦𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 𝗮𝗻𝗱 𝗹𝗲𝘁’𝘀 𝗱𝗶𝘀𝗰𝘂𝘀𝘀 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝘁𝗼𝗱𝗮𝘆. 🔑 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀 full stack developer, react developer, ruby on rails developer, vue developer, node.js developer, web app development, mvp developer, scalable web apps, restful api, aws developer, mongodb, postgresql, javascript developer, frontend developer, backend developer, software engineer, custom web application, cross-platform development, agile development, startup mvp, cloud deployment, performance optimization, api integration, user authentication, secure web app, ecommerce developer, saas developer, legacy code migration, bug fixing, code refactoring, responsive design, ui/ux, git, figma, github, project management, ec2, elastic beanstalk, cognito, slack integration, jira, startup-focused developer

100% 🚀 TOP RATED PLUS, 𝗧𝗢𝗣 𝟯% 𝗼𝗳 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗲𝗿𝘀 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 I am a FULL-STACK web developer with many years of experience. Flexible, persistent, and committed team member is who i am. My skills set: - build shopify app 2.0 with graphQL api - Backend: Ruby on Rails, Node.js, Next.js MySQL, PostgreSQL, MongoDB, TDD, rSpec, API integration/design - FrontEnd: HotWire, Reactjs, Angularjs, Vue.js, Tailwindcss, Twitter bootstrap, Typescript, CSS, HTML. I am comfortable on advanced usage of GIT I enjoy helping my clients building well designed and profitable projects.

I’m a top Sharetribe developer with extensive expertise in building and customizing marketplaces that drive results. Over the years, I’ve helped clients launch feature-rich platforms tailored to their unique business needs. I handle everything from designing the look of your marketplace to adding advanced features and making sure it runs smoothly. My focus is on creating a platform that meets your goals and gives your users a great experience. I am also experienced in technologies like Ruby on Rails, Node.js, Express, Postgres, MySQL, JavaScript, jQuery, Sharetribe, and React. I bring a wealth of experience to the table, and I'm eager to tackle any project or challenge that comes my way. Whether it's crafting seamless user interfaces, optimizing database performance, or building dynamic web applications, I'm ready to dive in and make it happen. Let's transform your ideas into digital reality! I also have extensive expertise with Bubble.io and am a highly qualified no-code/low-code developer. I have extensive expertise with Bubble.io and I am a highly qualified no code/low code developer I've worked on many kinds of projects such as eCommerce, CRM, ERP, RESTful API service, Payment platforms integration in Ruby on Rails. I'm Highly Proficient in use almost Rails' well-known gems: Devise, Cancan/Pundit, Paperclip, Sidekiq/Resque, RSpec/Minitest. My Full Technical abilities are: ✔︎ Ruby, Ruby on Rails, Node, Express, ✔︎ Open source - Spree, Solidus, Catarse, Discourse ✔︎ Sharetribe, Custom Sharetribe, Sharetribe Flex, Sharetribe Go ✔︎ React/Redux/Mobx, React Native, Vue.js. ✔︎ Javascript | CSS (with Sass, Stylus and Postcss ) | HTML (erb, Haml, Jade, Slim, JSX) ✔︎ MongoDB, PostgreSQL, MySQL ✔︎ Third-party API: Google Map API, AWS, Digitalocean API, GitHub API, Facebook, Twitter, Vk.com and so forth. ✔︎ Web-servers arrangement: Linux, Nginx, PostgreSQL, Passenger, Rails, Node.js I follow Agile methodology and I am highly familiar with scrum principles. I am familiar with version control tools like Bitbucket, Github and Gitlab. I also have good experience working with project management tools like Asana, Jira, Trello, Basecamp, Lark and Some others and widely open to adopt any new tool for betterment and transparency. I am accessible to offer Technical meeting/Test. Kindly let me know whether you're intrigued, I couldn't imagine anything better than to set up a brisk introduction visit/call at your helpful time. I am looking for long term working relationship.

I’m a Senior Web Developer, Team Lead, and Software Architect with over 20 years of experience building robust web applications across a wide range of industries and domains. Soft Skills • Leading and organizing agile development processes • Translating ideas into clear wireframes and product concepts • Designing scalable and efficient database architectures • Building and mentoring high-performing teams • Communicating effectively with non-technical stakeholders Technologies • Ruby on Rails • PostgreSQL, MySQL, Neo4j, Elasticsearch • JavaScript (Stimulus, Turbo.js, Vue.js) • Linux system administration, AWS, Heroku, Docker • HTML5, CSS, Tailwind If you have an idea for a project or need technical leadership, feel free to get in touch.