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Full Stack Developer with 8+ years of experience in building high-performance web applications. Proficient in modern JavaScript frameworks like React.js, Angular, and Vue.js, along with backend expertise in Node.js, Express.js, Python, and Django. Adept at optimizing UI/UX with Material UI and Tailwind CSS while ensuring seamless data flow using Redux, Context API, and MobX. Passionate about performance optimization, cloud solutions (AWS), and implementing scalable, secure architectures. Committed to staying ahead of industry trends to deliver innovative and impactful solutions.
Software Developer with over 6 years of experience specializing in back-end engineering. Proven ability to design and build resilient, scalable micro-services using Java, Spring Framework, and cloud-native technologies. Consistently delivers high-performance software that enhances user experience and drives operational efficiency. Open to new challenges in Software Engineering roles.
I’m a senior mobile + backend engineer with 20+ years in software (PHP since 2002; professional since 2005) and 10+ years building mobile apps. I help teams ship and stabilize real products—especially apps that are “almost done” but stuck on crashes, performance, flaky networking, or release blockers. What I can help you with (fast, practical): • iOS (Swift, SwiftUI, UIKit): crash fixes, performance/memory, concurrency issues, architecture cleanup • Flutter (iOS/Android/macOS): reliability, state consistency, networking/retry behavior, release readiness • Backend stability (PHP/Laravel or custom, Python/Django, Rails): idempotency, queues, DB performance, webhook safety • Firebase + mobile reliability: Auth/Firestore rules, Cloud Functions patterns, analytics/instrumentation • Monetization + shipping: RevenueCat/IAP reliability, App Store Connect/Play Console, CI/CD, rejection handling Recent work includes taking a messy iOS codebase (CakeClub) to production-ready with a Firebase Cloud Functions v2 backend, stronger security patterns, CI/release automation, and RevenueCat integration; and delivering major cross-platform Flutter work (BillBlaster) including design refinements, admin tooling, and push notification features. If you come with logs/screenshots (Crashlytics traces, network errors, repro steps), I’ll give you a clear diagnosis and a prioritized fix plan—and if it makes sense, I can execute the fixes as a focused sprint.
* Experienced full-stack web developer with a strong passion for JavaScript ecosystem. I really love React, Node.js, Selenium and Material UI. * Over 12+ years of expertise in UI web development, proficient in utilizing modern web technologies and best practices. Extensive expertise in the development of Single-Page Applications (SPAs), with a focus on providing a validated, certified high quality UI and an optimal UX. * Have driven from ground up large-scale SaaS solutions for the Energy & Semiconductor industry by personally managing and mentoring a team of 10+ software engineers. Skilled in writing clean, reusable & testable code using latest software design principles with personal emphasis on JS / TypeScript (React, Node.js). * Focused on improvement initiatives aimed at enhancing the e cacy of QA activities and elevating the standards of products and services. * Known for building bridges between stakeholders and customer requirements through smart planning and innovative thinking, leveraging KPIs, regulations, and quality standards. Demonstrated an exceptional strength for comprehending a broad range of engineering skills, enabling me to successfully identify and resolve issues across the entire project life cycle.
I succeed or your **money back**. 💰 P.S.: I am travelling till August 2, so you can expect delays in response Diving into, understanding and debugging codebases alien to me is one of my core expertise. Welcome! 👋 As a Senior Software Engineer, I have sharpened my leadership and problem-solving skills to provide top-notch software solutions. With 8+ years of experience in web development using React.js, Node.js, Vue.js and Python, I have successfully built products used by top NBFCs and unicorns in India. My strengths lie in design, innovation, architecture, development, and deployment of web applications. I have strong operations acumen and can lead software and web development projects from system architecture design to end-to-end engineering and management. With a proven track record, I have effectively managed teams of up to 9 engineers to deliver business services to valued clients. ====== How does it work? We start a 1:1 session. Both of us join the zoom call. You start the session timer and pause it. You share your screen and explain the problem statement. I do some research if necessary. We resume the timer and I try to help. Full refund if I do not succeed.
Experienced Microsoft C# .NET and SQL developer with 18+ years of experience in application development, solution architecture, and mentoring teams. Skilled in designing scalable systems, improving legacy code, and implementing best practices like SOLID principles. Passionate about architecting solutions by understanding the big picture and driving innovation.
Software Engineer with more than 12 years experience mainly with C#, WPF, WCF and Web Development like Node.js, Angular, React also more than 7 years experience with Oracle DB and other databases, SQL , SQLITE and Progress, MongoDB.
Experienced Full Stack & Blockchain & AI/ ML Developer with 10+ years of success building decentralized, real-time web applications and optimizing legacy systems. Specialized in EVM smart contract development, crypto payments, and Web3 integrations (Metamask, WalletConnect, Coinbase Wallet). Also Specialized in LLMs (GPT-4, LangChain, Haystack), RAG pipelines, and intelligent agent workflows. Proven track record in modernizing codebases, scaling blockchain infrastructure, and enhancing UI/UX fsor Web3 ecosystems. Adept at Solidity, Node.js, Golang, React, and cloud-native DevOps. Passionate about revolutionizing digital experiences in music, finance, and identity through blockchain..
I mentor programmers and development teams. I have the skill set to get you out of any development problem. That includes but not limited to: Java, C#, .NET, JavaScript, TypeScript, Python, Spring, Angular, React, and Agile methodologies. I have a focus on writing "clean code", secure coding, and identity management (SAML 2.0 & OAuth 2.0).
Experienced (18+ years) developer and friendly Ruby on Rails and React/Next.js/Redux Developer/Mentor (with passion for helping others learn) | ★ 3,655+ 5 ★ sessions/jobs. 10+ years on top of the Codementor Ranking ★ https://www.codementor.io/ruby-on-rails-experts I am a Senior Software Engineer from Toronto, currently working as a Ruby on Rails and React/Redux Developer at theScore Inc. I am passionate about helping and mentoring people, especially those who are new to web development and the programming world. I am specialized in explaining the core concepts of Ruby and Rails, Javascript, React, APIs and everything else along with the best practices. I focus on the learning experience of my students and make sure they get exactly what they want. I have excellent academic track records (Bachelor of Science in Computer Science and Masters in Computer Engineering from the University of Toronto) along with strong development and industry experience in Software Development and Web Development (18+ years coding experience in total). I have helped more than 800 individuals here at CodeMentor (with 3,655+ 5 ★ sessions) with their projects implementation, bug fixes, architecture advices, performance improvements etc. I have worked with a bunch of CEOs and CTOs of YC start-ups and helped them with their projects. Made long term relationships with many of them which I help in a regular basis today. I have helped a LOT of bootcamp students here at CodeMentor and helped them build their web development career path and getting jobs after the completion of their bootcamp cohorts. Here at CodeMentor, I have helped people from all levels: From someone who is brand new to programming to 30+ years of experienced Senior Software Engineers, Product Managers and everyone in between. It's been an amazing journey here at CodeMentor for the last 8+ years! :-) I started programming and solving problems in 2006, at the age of 18. Since then, I wrote programs in a variety of programming languages such as C, C++, Java, PHP, Ruby, Python, Javascript, etc. These days, I use Ruby and Rails and React JS as my primary programming languages and frameworks. I can help with debugging your issues as well as refactoring your code according to the best practices and conventions out there. Helping people is my passion and motto in life. If you think I can help you in any way, please get in touch! Specialties: * Building scalable and performant backend APIs in Ruby on Rails (Active Model Serializer, GraphQL, Grape, Jbuilder, RABL, etc.) for android, iPhone or web applications. (For more than 12 million users). * Integration of backend APIs with Javascript frontend framework (ReactJS) using JSON Web Token (JWT). * Built highly scalable Push Notification System for theScore sports application (For ~10 million users). * Implemented instant player, team and news article search for the theScore and theScore eSports apps which have more than 6 million monthly active users using ElasticSearch and Rails. * Backend Ruby on Rails Development (With scaling, performance optimizations, database query optimizations, caching best practices, etc.). * Test Driven Development with clean code and best practices. * Web Scraping (Nokogiri, Mechanize) (Scrape data from anywhere on the internet!). * Reverse engineering complex APIs and web applications to write automated scripts to mimic and automate user behaviour and extract required data. * Explain concepts/solutions clearly and concisely according to the level of the client/student. (Helped over 800 people on CodeMentor with 3,655+ 5 ★ sessions) * Giving architecture advice for your application. Explain which tools/gems to use and why. * Setting up SSL certificates for Rails application (Nginx server) on AWS EC2 instance and securing your application. * Suggesting best practices and focusing on the best learning experience and long-term achievements. * Showing cool tips and tricks that I have learned over the past 18+ years (and still learning!) as a professional Ruby on Rails developer to be more productive and efficient at work. * Upgrading Ruby/Rails versions for your existing application. * Finding bottlenecks and Optimizing performance for your slow Rails applications. * I can help you to prepare for interviews for Ruby on Rails developer position, or any other Software Development position. I have successfully guided many developers who got their dream jobs after practicing coding interviews with me!
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The length of a project depends on many factors, including the scope of your project and the technical complexity of it. When you post a freelance OAuth 2.0 project request on Codementor, you’ll have the option to indicate when you’d expect the project to be completed. We suggest chatting with the interested developers to ensure both sides are on the same page. For more information on how to post a freelance OAuth 2.0 request on Codementor, check out our article.
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