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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.
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.**
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 have experience as both a front-end developer and a full-stack developer. I've also worked as a technical team lead, and a software engineering manager. My areas that I currently focus on teaching for are React, DevOps, Cypress, and Spring Boot.
I've also done a few thousand hours of tutoring over the past 11 years, mostly for software development.
I'm conscious of keeping people from feeling overwhelmed or lost.
I meet you where you are in your current skill level. When we work together, the learning is enjoyable and empowering.
I have 10 years exp in Python, MySQL, GoLang, Data Science. I have rich experience in developing frameworks in scratch using Pytest and unitest. I am very passionate about coding and having good knowledge of data structures and algorithms
I love to teach what I know. I think I can explain things easily with examples. I have been working as a Software Engineer for the last 5 years and have worked with some of the world's most reputed companies like **Open AI, Scale AI, Doloras Lab**, etc as a freelancer.
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. 🐧🍏
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.
Experienced Software Engineer with 7 years of professional experience in mobile and web application development, architecture design, and technical leadership. Proven track record of delivering high-quality software applications, leading teams, and mentoring developers to adopt best practices and delivering on time.
Skilled in modern development frameworks, and emerging technologies such as Apple Vision, DockKit, AI Integrations to build immersive and adaptive app experiences. Strong full-stack capabilities with expertise in backend systems, RESTful APIs, cloud services, and cross-platform integrations. Experience with collaborating with clients internationally for complex projects, and ensuring scalable and maintainable software solutions.
Please send me a message or schedule a session before connecting for a call.
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