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As a seasoned engineer with over five years in complex software systems across multiple industries (such as Logistics systems, HealthTech, EdTech, among others), I bridge the gap between complex technical challenges and accessible solutions. My expertise in cloud-based applications isn't just about writing code, it's about making technology work for people.
Whether you're struggling with debugging code, designing efficient algorithms, or navigating complex system architectures, I've been in your shoes. I've developed enterprise applications from the ground up and guided hundreds of learners through challenges ranging from basic syntax errors to advanced architectural decisions.
**What sets me apart? I don't just solve problems, I help you understand them. My approach combines hands-on engineering experience with a talent for explaining complex concepts in straightforward terms. From untangling complex code issues to optimizing system performance, I translate technical challenges into clear, actionable steps**.
My greatest achievement isn't the systems I've built, it's watching my mentees transform from curious beginners to confident professionals. This journey has sharpened my ability to meet you exactly where you are—whether you need an expert to help resolve a persistent bug or a patient guide through new programming paradigms.
**Let me help you turn technical obstacles into opportunities for growth.**
Hi there! I'm a seasoned Software Engineer with expertise in designing scalable solutions and building high-performance applications. From startups to enterprise clients, I've successfully delivered projects that meet business needs and exceed expectations. Let's create something amazing together!
A full-stack software engineer passionate about crafting scalable, high-performing web solutions. With a strong focus on appealing user interfaces, efficient software design, and outstanding online platforms, I leverage my tech stack to build exceptional products. I thrive on collaborating with other talented engineers to deliver quick and effective solutions.
I am a full-stack software engineer with over seven years of experience building and managing web applications. Passionate about solving real-world challenges through code, I specialize in developing scalable, efficient, and user-friendly solutions. My expertise spans multiple technologies, and I am committed to continuous learning to stay ahead in the ever-evolving tech landscape.
Technical Expertise
Frontend Development
Proficient in HTML, CSS, JavaScript, TypeScript, and modern frameworks such as React.js, Redux, Next.js, and React Native. Experienced with UI libraries like Bootstrap, Material UI, Tailwind CSS, Semantic UI, and Styled Components.
Backend Development
Skilled in Node.js, NestJS, Express.js, Python, and Django, designing and implementing powerful backend systems that ensure performance and scalability.
Mobile Development
Experienced in React Native and Expo, crafting responsive and intuitive mobile applications.
Databases
Proficient in MongoDB, MySQL, PostgreSQL, and GridDB, ensuring efficient and well-structured data storage solutions.
CMS & No-Code Solutions
Capable of developing and customizing web solutions using WordPress and Wix.
APIs & Development Tools
Well-versed in RESTful APIs, GraphQL, authentication (JWT, Passport.js), file handling (Multer, Cloudinary), email services (Nodemailer), testing (Jest), version control (Git, GitHub), and payment gateway integration (Paystack API).
Technical Writing Experience
Beyond software development, I have over six years of general writing experience, including three years focused on technical content creation. I have collaborated with tech companies such as Cloudinary and Bunzz, producing clear and engaging content on topics like blockchain, video streaming, and software development. My expertise includes writing API documentation, user guides, FAQs, knowledge base articles, and technical blogs, ensuring complex concepts are accessible to diverse audiences.
Work Ethic & Collaboration
I am a detail-oriented, responsible, and reliable professional with excellent communication and time management skills. I thrive in collaborative environments and am always open to learning and adapting to new challenges.
Let’s Connect
If you're looking for a skilled full-stack developer or an experienced technical writer, I’d love to collaborate. Feel free to reach out for a discussion—I’m available for chat or video calls and respond promptly to inquiries.
Looking forward to building exceptional solutions together!
Firstly, I am a great listener, A Fullstack Web Developer, with a sound understanding of Web Technologies and over 8 years of professional web development experience building products in various industries from Edutech to E/Social-commerce, ERP & IOT, and more. I am also a Technical Writer and enjoy giving back to the community through open-source projects and technical web development articles. I enjoy building products to solve the smallest bit of problems for myself first, and scaling to the rest of the world. I like to play the piano or learn a new skill on days I am not building.
Senior Full‑Stack Developer with over seven years’ experience designing, building and maintaining large‑scale web applications.
Track record of delivering end‑to‑end solutions by partnering with stakeholders to translate business and user needs into reliable software.
Committed to clean, maintainable code, performance tuning, security best practices, and automated CI/CD pipelines.
Nearly two years of hands‑on AI experience, integrating machine learning models and automation to boost product intelligence.
I’ve contributed as a developer at global leaders Adobe and Newgen, as well as at high‑growth startups MoveInSync and Zillious Solutions.
Skills
Advanced:
Java, MySQL, PostgreSQL, Spring, Hibernate, Spring Boot, Maven/Gradle, Microservices, Multithreading & Concurrency Control, Web Services (SOAP & REST), RPC, Git, Google Cloud Platform (GCP), Database Modeling & Schema Design, SQL (Stored Procedures/Functions, Triggers), Docker, Kubernetes.
Intermediate:
TypeScript, Python, Angular, React, API Gateway, Service Discovery, Load Balancer, ELK Stack, Kafka, RabbitMQ, Redis Cache, RAG (Retrieval-Augmented Generation), AI Agents, LangGraph, Vector Databases, AI Workflows, Fine‑Tuning.
Core Strengths:
Scalable system design, back‑end architecture, data structures & algorithms.
How I Can Help You
– I’m here to tackle your toughest technical challenges with expertise and dedication.
Special Offer
– Enjoy your first session free! (Terms & Conditions apply — let’s discuss your needs during our requirement-gathering call.)
Satisfaction Guaranteed
– Not satisfied? Request an instant refund, no questions asked.
For a comprehensive overview of additional technologies and frameworks tailored to your needs, please refer to the Expertise section of my profile.
**Khatri Karan** is an enthusiastic and professional Programmer, who enjoys being part of leading and a successful and productive team. Karan is quick to grasp new ideas and concepts and can develop innovative and creative solutions to problems. Able to work well on my own initiative and can demonstrate the high levels of motivation required to meet the tightest of deadlines. Even under significant pressure, possesses a strong ability to perform effectively.
Passionate and Extremely Experienced Software Engineer.
Extremely powerful problem solver.
● **Languages, technologies & Methodologies:**
Progressive web app using google workbox, Angular 5-10, React JS, Node.js, React Native, Angular1.x, .Net core 1.0-3.0, MVC.NET, ASP.NET Web API, WCF, Entity Framework, Typescript, ECMAScript, Knockout JS, Electron, Elastic Search, Kibana, SQL Server, Redis, MongoDB, MySQL, Postgres SQL, Amazon S3, Amazon SQS, Firebase, Google Api.AI, Python (Pursuing), NuGet, NPM, Yarn, Log4Net, Selenium Web driver, JavaScript, Google Map, Social Media Integration (Facebook, LinkedIn, Gmail, Twitter), Auth0, jQuery, HTML, CSS.
● **Cloud Services:** AWS, Microsoft Azure
● **Operating Systems:** macOS Catalina, Linux (Ubuntu 14/15), Windows XP/7/8/10
● **Tools & Other:** Visual Studio 2015, 2017, 2019, Visual Studio Code, Web storm, Studio 3T, SQL SERVER 2014, PostgreSQL, Git, Postman, Twitter Bootstrap, Microsoft Office, Libre Office, JIRA, Trello
Open source Contributor.
Self-learner.
Turning the client's dreams into reality by delivering high-quality projects.
Please contact me if you are interested.
Thank you.
Hi wonderful clients.
I am a dedicated engineer with excellent communication, time management and computer skills. I aim to leverage my abilities to successfully solve whatever challenges you may face in my field. Frequently praised as hardworking by my peers, I can be relied upon to help achieve your set goals. WIth several years of dexterity with several web development tools such as Reactjs, AngularJs, NodeJs, Postgres, MySql, Laravel, Php, Ionic framework, i position myself to be amongst one of the best in the software engineering field.
- 5+ projects in freelancing mobile+website games in Construct 3 for clients
- 1 year of daily tutoring in Construct 3 and C++
- 3 years of school learning experience with Java
- 5 months of tutoring in Unity game dev
- published one commercial Construct 2 game on Wii U "Reversi 32"
- tutored Intro to Computer Science material using Python with Minecraft every week since Dec 2019
Hey! I am Johnny B. 🙏
(Actually, my Romanian friends call me Ionică, which in English is basically: Johnny).
...and I 💖 emojis!
I started coding around 2010, starting with simple static websites, WordPress applications, and then tried Node.js for the first name around 2012. Since then, I have been working with Node.js. I like it a lot.
Currently, I do the best in:
★ Node.js 🚀
☆ Command line tools
☆ Express.js
☆ Passport
☆ Raw/minimal code, without frameworks (e.g. simple HTTP server)
☆ Using npm
☆ Creating npm packages for Node.js (and for the front-end as well)
☆ Scraping the web
☆ Automation of repetitive tasks
☆ Image processing
★ JavaScript ✨
☆ Creating and importing libraries
☆ jQuery (creating plugins, using them etc)
☆ Scraping
☆ Automation of repetitive tasks
☆ Publishing npm packages
☆ SVG (SVG.js, d3.js)
★ HTML & CSS 🎨
☆ Fixing CSS quick issues
☆ Implementing mockups
☆ Making the page responsive
☆ SEO tips & tricks
★ Command line 💻
☆ Shortcut tips
☆ Creating command line tools
☆ Using VIM & Tmux
★ Code Review 👀
☆ I do code review offline, for Node.js, JavaScript, eventually CSS.
☆ Can be done in a live session as well.
☆ Security checks
☆ I point things that can be done in a better way
★ Using Git & GitHub/GitLab/BitBucket etc. 😸
☆ Introduction to how Git works
☆ Using Git hosting services (e.g. GitHub, GitLab, BitBucket etc)
☆ Top Git commands
☆ Shortcuts
If I can help, I will definitely do it, as long your app is not promoting things that tend to be potentially immoral. For example, I'm happy to help you build an e-shop, but I will probably not build an e-shop designed specifically for selling wine since I am against the use of alcohol for drinking.
♦ 🚀 Node.js: 9 years of experience, ~700 packages published on NPM
♦ 💛 JavaScript: 9 years of experience, lots of libraries you can download freely (https://goo.gl/ewoQsK)
♦ 🗣 Fluent in speaking English & Romanian, and comfortable in Spanish & Portuguese
♦ 😸 GitHub Enthusiast (follow me: https://github.com/IonicaBizau)
♦ 😻 Git & GitHub power user
♦ 🍀 Comfortable with MongoDB (especially, the native driver for Node.js)
♦ ❇️ I will not charge you if I can't fix your issue.
Why you can trust me:
★ I am a vegetarian. I have never eaten meat. 🍍🥑🥗
★ I have never drunk wine, beer, etc. Water is the best. 💧
★ I work for 6 days, and I rest on the 7th day. That's why I am *not* available on Saturdays (specifically between Friday's sunset and Saturday's sunset, my location at the time—you can my timezone a little bit below). 🙏
★ I sleep between 9:18 PM and 4:42 AM. Depending on your timezone I can wake up earlier if you book a session with me. 💤
★ I am a musician (pianist and organist). 🎹
★ I use VIM on macOS and Linux. 🐧🍏
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Frequently asked questions
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