Currently specializing in full stack React, lead gen, scraping, real estate data. I have a 100% success rate over 800+ projects. - Puppeteer / Selenium / Playwright - Rescuing web projects from other developers / vibe coders - Full-stack React (next.js / tailwind) - Data projects (import / sync / headless api) I am not currently bidding on projects, I will only consider projects that I have been invited to. The reason for that is that all jobs lately are now flooded with unqualified applicants (Upwork please fix this).

Software developer focused on building reliable, scalable backend systems and APIs. I’ve worked on production Python and Ruby on Rails applications in both monolithic and microservice architectures, with strong experience in payments, subscriptions, integrations, and business-critical workflows. At PayMongo, I helped build fintech services and spearheaded development of a subscription API, designing billing flows, webhooks, retries, and idempotent processes in a high-availability environment. Alongside Python and Rails, I have also worked with Next.js to build modern web applications and data-driven frontends that integrate seamlessly with backend APIs. My day-to-day work includes designing REST APIs, working with PostgreSQL, background jobs, and performance optimization. I enjoy collaborating with product and support teams to turn real business needs into clean, maintainable solutions. Core strengths: • Ruby on Rails backend development • Next.js and modern React-based web apps • REST API design and integrations • PostgreSQL database design and optimization • Background jobs and asynchronous workflows • Microservices and large monolithic applications • Clean architecture, testing, and maintainability I’m looking for long-term collaborations where I can take ownership of features, improve systems, and help products grow.

⭐️ Expert Vetted - Top 1% of talent on Upwork 🕒 20,000+ hours on Upwork ✅ 15+ years of experience ✅ 170+ projects delivered ✅ Excelling in delivering Fortune 500-scale projects Hi there! I'm a Senior Full Stack developer, expert-vetted on Upwork, with a proven track record of delivering high-impact solutions for Fortune 500 companies, Silicon Valley startups, and global enterprises. I specialize in building Shopify stores, custom MVPs and end-to-end Web, Mobile, SaaS, AI/ML, Web3, CRM, ERP, and cloud-native applications across a wide range of industries. I work as a hands-on technology partner, supporting every stage of the development lifecycle—from concept and design to deployment and long-term maintenance. I genuinely love helping businesses build kick-ass software & artificial intelligence products! This innate drive and dedication towards excellence has earned me an Expert-Vetted Badge from Upwork - visible to Enterprise Upwork clients, which has ranked me among the top 1% of software development talent on the platform. Accomplishments: ⭐️ As certified members of the AWS Partner Network, our expertise has been formally recognized by Amazon. This affiliation is rare among freelancers and agencies and gives us direct access to resources and best practices most don’t have. ⭐️ Awarded an Expert-Vetted Badge on Upwork Top 1% of Software Development Talent on Upwork ⭐️ Recently received the Top 100 Award on Clutch.co (leader in B2B reviews) ⭐️ Was asked to join Upwork's Customer Advocacy Program ⭐️ We’ve done projects for some big names: Fortune 500 companies ⭐️ Past clients have used web and mobile apps developed by us to raise over $50 million (USD) in funding If you have read this far, please note that I appreciate you taking the time to learn about me. Personally, it’s been an amazing journey and knowledge exercise to get to this level of competence in AI and software development. Software Development: Full-Stack Development | Shopify | Shopify Apps | Headless | Web and Mobile Development | Web Application | Android | iOS | Custom Web3 dApps | Smart Contract | Crypto Wallet | AI Agent Development | AI Bot | CMS Development | Machine Learning AI/ML | NLP | Data Analytics | ETL | SaaS Development | MVP | Database Architecture | API Development | dApp Development | AWS | GCP | DevOps | MERN | MEAN | LAMP | QA/QC Tech-stack: ⁃ Front-End Development: React.js, Vue.js, JavaScript, TypeScript, Tailwind CSS, HTML, Angular, jQuery ⁃ Back-End Development: Node.js, Golang, Rust, C++, Zig, Express.js, Next.js, NestJS, Nuxt.js, Python, Django, Java, Spring, Laravel, PHP, Firebase, Ruby on Rails, Kotlin, Swift, Flutter ⁃ Database Management: MySQL, MongoDB, PostgreSQL, BigchainDB ⁃ Blockchain: Ethereum, Solana, Solidity, Anchor, Smart Oracles, Chainlink, DeFi, DEX, Crypto Hyperledger Fabric, Web3.js, Ethers.js ⁃ Messaging/Queuing: Apache Kafka, RabbitMQ, Amazon SQS, Redis Streams, NATS, Adaptive Aeron ⁃ API Integration: RESTful APIs, REST, FastAPI, GraphQL, gRPC, OpenAPI, WebSockets, Microservice ⁃ AI Integration: Open AI, Claude, Gemini, ChatGPT, Llama ⁃ Machine Learning (AI/ML): AI Agent, AI Bot, Python, TensorFlow, PyTorch, LangChain, OpenAI GPT, FastAPI, Apache Spark, Hugging Face, AWS SageMaker, OpenCV, Vertex AI, RAG, LLM finetune, NLP, ML ⁃ AWS Tools: Lambda, CloudFront, EC2, S3, Kinesis, Kubernetes, Docker, Nginx ⁃ Version Control: Git, GitHub, Bitbucket

Full stack developer with 10 years of experience | top 1% on Upwork ( Expert-Vetted ) I turn ideas into real applications your users can depend on Recent work: → Product Architect at Upwork, leading a team of 100+ engineers within Upwork's Engineering Talent Cloud → Led frontend for Autobound's AI sales automation platform - grew from a single-engineer startup to $4M raised and millions in revenue (Vue.js/Nuxt + Chrome extension + micro-frontends) → Built full stack for Augmento's AR/VR product - used by 1,000+ brands and 100K users across retail and real estate → Migrated DriverHRIS - 1,000+ screens from Vue 2/.NET to Vue 3 + Node.js microservices, with a 10x (1,000%) performance gain → Rebuilt Wawibox (German dental marketplace) - full Nuxt 2 → Nuxt 3 SSR → Nuxt 4 migration, 80% faster load time I also co-founded Softonix, a 25-engineer Vue.js | Node agency in Lviv - so if your project grows past one developer, I can scale the team without handing you off to strangers. Want to scope something? Let's talk - I usually reply within a hour 🚀 Keywords web developer, react developer, wordpress developer, mobile app developer, SQL, Software Design, Application Improvement, Software Development, Software Debugging, CSS, Software Consultation, Git, HTML, Back-End Development Framework, Full-Stack Development, Database Architecture, Agile Software Development, Node.js, Laravel, Bootstrap, Web Application, WordPress, Tailwind CSS, Python, MySQL, Shopify, PHP, JavaScript, Web Design, Desktop Application, Software Testing, API, jQuery, Vue.js, CSS 3, Standalone Application, React, HTML5, Software Architecture & Design, Angular, API Integration, Front-End Development Framework, Adobe Photoshop, React Native, blockchain developer, MongoDB, full-stack web developer, mern stack developer, ios app, php developer, game developer, Graphic Design, full stack developer, c#, front end developer, full stack web developer, front end web developer, web developer wordpress, web app developer, shopify web developer, Web Development, Responsive Design, WooCommerce, Cross Browser & Device Compatibility, Website, Website Security, Website Migration, Website Backup, react native developer, python developer, full stack react developer, react developers ethiopia, react js developer, react web developer, Front-End Development, React Bootstrap, TypeScript, Redux, wordpress website, shopify developer, seo, WordPress Customization, WordPress Plugin, bbPress, WordPress Backup, WordPress Installation, WordPress Optimization, Elementor, WordPress Development, WordPress Security, WordPress Migration, WordPress Bug Fix, WordPress Theme, WordPress SEO Plugin, flutter developer, Mobile App Development, Native App Development, Mobile App Design, App Development, Social Media Account Integration, Android App Development, Mobile App, Swift, Kotlin, iOS Development, Java, Mobile App Improvement, User Profile Creation, Mobile App Testing, Hybrid App Development, Flutter, Smartphone, Mobile App Bug Fix, Android, Mobile App Redesign I am not a mobile app developer but I have such capacity in my team. I am full stack developer and software architect with 10 years of experience and highest posible AI adoption expertise. I am web developer fullstack Software developer Test section: Next.js, GitHub, OpenAI Codex, Code Review, Cursor, SEO Performance, Affiliate Marketing, Affiliate Marketing Website Vercel, Strapi, Amazon API, CMS, Analytics, Conversion Optimization, Recommendation Engine, Prompt Engineering, Fractional CTO, Technical Product Manager, Startup Tech Lead AI Agent Development, AI Development, Amazon Web Services Postgres, AWS, OpenAI API, Claude API, LLM, AI Agent, Anomaly Detection, Document Parsing, Enterprise UI, Manufacturing, B2B, Salesforce, Vue 3 , React,

"When in doubt, do the simplest thing that could possible work" - Ward Cunningham I'm a Rails dev from Philippines with over 11 years of experience. I love Ruby and Javacript. Here's a quick hello page if you're interested jm-maniego.github.io

Hi there ☺️ I'm Tеtiana, and I've been building software products for over 15 years. My background is in computer science. I started as a developer, later worked as a project and product manager, so I understand how every stage of the software lifecycle connects. 🧠I'm really passionate about gamification and behavioral design, and I try to bring these principles into every product I work on. My goal is to make apps not only functional and beautiful, but also enjoyable, the kind that people want to use again and again. Over the years, I've built mobile and web applications for clients across different industries, from health and wellness to education, fintech, and logistics. I work with a team of 25 experienced developers and designers, so whether a project needs extra design support or full development, there's always someone ready to help. 🤖I also enjoy exploring AI technologies and finding ways to use them in real-world solutions, whether it's automating processes, improving user engagement, or enhancing analytics. What I care most about is long-term collaboration. I treat every client's project as my own, taking care of the technical side so they can focus on the business side. Here's a quick overview of what I can help you with: 🔹 Web Development: full-cycle development for web apps, SaaS platforms, and e-learning portals, and more 🔹 Mobile App Development: end-to-end iOS and Android development, from idea to App Store and Google Play launch, with ongoing support 🔹 UX/UI Design: user-centered design, including audits, research, prototyping, and interface improvements for clear, intuitive experiences 🔹 Gamification & Behavioral Design: applying frameworks like Octalysis and using Unity, VR, and AR to make digital products more engaging 🔹 Marketing & Recruitment: helping clients promote their products and build strong in-house teams with skilled developers and project specialists 📧If this sounds like what you're looking for, feel free to reach out, I'll be happy to learn more about your project and see how I can help.

Hey there! I’m Jib, your go-to expert for all things Ruby on Rails, with a solid 5-year track record of delivering exceptional web applications. Skills 🔥 Server Stack: 💡Languages: Ruby, Python, Typescript 💡Frameworks: Ruby on Rails 5/6/7, NodeJS 💡Storage: PostgreSQL, MySQL, NoSQL, Redis 💡Testing: TDD/BDD/DDD -- RSpec, Minitest, Capybara 💡Deployment: Heroku, AWS 🔥 Client Stack: 💡JS Frameworks: Vue, React, Angular & Stimulus 💡Languages: HTML5, SCSS, Javascript (ES13) 💡CSS Frameworks: Bootstrap, Foundation 💡Module Bundlers: Webpack 💡JS Libs: jQuery, CoffeeScript, etc 🔥Other: 💡Libraries: GraphQL, Spree, Shopify 💡Others: Git, Docker, Wordpress, Jenkins 💡OS: Linux (Debian, Arch), MacOS

Senior Full-Stack Engineer specializing in Ruby on Rails with extensive production experience building scalable web applications and managing complex infrastructure. Over 8+ years delivering reliable, high-performance systems for clients ranging from startups to established platforms serving thousands of daily users. **Technical Expertise:** • **Backend:** Ruby, Ruby on Rails (Rails 2–7+), REST APIs, PostgreSQL, MySQL • **Frontend:** React, Vue.js, JavaScript • **Infrastructure:** AWS (RDS, S3, EC2), Kubernetes (EKS), Helm, Argo CD, Heroku, Docker • **DevOps:** CI/CD (GitHub Actions), GitOps workflows, observability (Datadog) • **Practices:** TDD, code review, secure delivery, performance optimization, safe upgrades/migrations **Key Accomplishments:** Most recently as a Senior Software Developer at Jane Software (Canada), I contributed to building and evolving their Kubernetes platform (EKS) supporting production systems used by thousands of users daily. I shipped full-stack improvements across their Rails monolith, delivered multiple Ruby/Rails upgrades while maintaining system stability, and improved delivery safety through Helm + Argo CD and enhanced observability via Datadog. Currently, as a Senior Software Engineer subcontractor at reinteractive, I've upgraded and maintained 7+ client Ruby on Rails codebases, successfully migrating legacy applications to newer Rails versions. I deliver feature work and production fixes across app layers (Rails + UI), with careful regression control during upgrades—critical for maintaining business continuity. At MoneySmart Singapore, I helped design a normalized, configurable platform with separate backend API and frontend codebases to support multiple fintech products. This architectural improvement enabled new product launches in 1–2 weeks (configuration-driven rollout) instead of 3–6 months (forking/tweaking a monolith), dramatically accelerating time-to-market. As a Ruby on Rails Architect at OnTheGoSystems, I led the migration from Rails 2 to Rails 5 and modernized their product experiences. I re-engineered a legacy desktop application into a React web application, delivering significant UI improvements while maintaining functionality. **Production-Ready Experience:** • Built and operated production systems on AWS/Heroku and Kubernetes (EKS) • Optimized performance by fixing N+1 query patterns, implementing caching strategies, and tuning database queries • Managed incident response, monitoring, and alerting for high-traffic applications • Delivered reliable Rails API improvements and full-stack features with emphasis on safety and stability **What I Bring:** I combine deep technical expertise with a focus on reliability, performance, and maintainable code. I'm experienced in working with distributed teams across time zones (Canada, US, Asia) and understand the importance of clear communication, timely delivery, and production-ready code. Whether you need feature development, system upgrades, performance optimization, or infrastructure improvements, I bring proven experience building systems that scale. Available for both short-term projects and long-term engagements. I'm committed to understanding your business needs and delivering solutions that drive real value. Let's discuss how I can help bring your project to production successfully.

𝗦𝗲𝗻𝗶𝗼𝗿 𝗥𝗮𝗶𝗹𝘀 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝘄𝗶𝘁𝗵 𝗦𝗽𝗿𝗶𝗻𝘁𝟭𝟵 10+ years building backend systems that actually work in production. I handle the complex technical problems that slow teams down or break under real user load. 𝗪𝗵𝗮𝘁 𝗜'𝘃𝗲 𝗕𝘂𝗶𝗹𝘁 Production systems still running after years in finance, retail, logistics, and loyalty programs. These platforms process millions of records and survive multiple engineering handoffs because they were built right the first time. 𝗪𝗵𝗲𝗻 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗮𝗹𝗹 𝗠𝗲 • Your Rails app is too slow for real users • Legacy codebase blocking new features • Payment integrations breaking in production • AWS infrastructure costing too much • Rails upgrade stuck for months 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 • Rails API development and performance optimization • Stripe, PayPal, and custom payment system integration • AWS setup and cost optimization (EC2, RDS, S3, IAM) • PostgreSQL query optimization and complex migrations • Background job processing (Sidekiq, DelayedJob) • Rails version upgrades (5.x to 7.x) • Production monitoring with Zabbix and alerting 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸 Direct involvement from Sprint19's senior team. No handoffs to junior developers. Clear communication, realistic timelines, and code that your future team can actually maintain. I've led engineering teams and know what makes projects succeed or fail. You get both the technical expertise and the project experience. 𝗥𝗲𝗮𝗱𝘆 𝘁𝗼 𝗙𝗶𝘅 𝗬𝗼𝘂𝗿 𝗕𝗮𝗰𝗸𝗲𝗻𝗱? Message me with your specific technical challenge and timeline.

WEB DEVELOPER PROFILE A diligent and highly motivated individual. I exhibit flexibility and able to learn quickly with a strong commitment to succeed in my career. I am optimistic, can communicate in an appropriate manner