Hire Top Freelance D3.js Developers

Johnny B. (Ionică Bizău)

Freelance D3.js Developer5.0 (1760 reviews)

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. 🐧🍏

Fazal Ahmad

**Software Engineer** with **15+ years** of experience in **VBA, C#, .NET Core, ASP.NET, C++, Node.js**, and _AI-driven applications_. Skilled in **Agile methodologies**, including _Scrum-based delivery, sprint planning_, and _backlog management_ using tools like **Jira** and **Azure DevOps**. Expertise in **cloud computing** (_Azure_), **system architecture**, and **CI/CD pipelines**. Strong background in **Machine Learning (ML)**, **Natural Language Processing (NLP)**, and **Sentiment Analysis** using _Stanford NLP, Custom Corpus_, and _SentiWordNet-based models_. Proven track record in _optimizing performance, delivering scalable solutions_, and **leading cross-functional teams** toward high-impact outcomes. _Passionate about continuous learning and fostering engineering excellence._

Varun Jewalikar

Hi! I love Java, Python, Javascript, distributed systems, large scale systems, machine learning, natural language processing and image processing. My work has been featured on the AWS blog (https://tinyurl.com/chaosrunner), The Guardian (https://tinyurl.com/topvocab) , Billboard.com (https://tinyurl.com/topprofane) and other print/digital publications. I also own Amazon's chaos testing framework called AWSSSMChaosRunner (https://github.com/amzn/awsssmchaosrunner). I am a Senior Engineer at Amazon's Prime Video and have worked on scaling backend systems to millions of transactions-per-second, utilising various cloud technologies and primarily working with Java, Kotlin and Javascript. This involves image/audio/text processing systems, creating & managing databases/APIs for mobile/web applications and everything in between. I have 15yrs+ experience with backend engineering, cloud tech, nlp, signal processing and image processing. I can help you with any of these topics. I also love hackdays and have attended 20 hackdays in Europe in the last couple of years and collaborated with beginners/experienced developers on different kinds of projects. Thanks for reading and hope to talk to you soon!

Emmanuel Inyang

I am a highly skilled software engineer with 5 years of experience, proficient in transforming wireframes into MVPs, architecting scalable microservices, and developing single-page applications. My technical expertise includes backend technologies like FastAPI and Flask, frontend proficiency in React and Vue, testing excellence, and database management. Key strengths include problem-solving, attention to detail, and thriving in collaborative environments. I excel in team management, fostering growth and productivity, and mentoring team members. Currently seeking a full-time role to leverage my skills and contribute to an innovative organization, with a focus on leadership growth and professional advancement.

Sohaib Asghar

With 6 years of experience as a Full Stack Developer, I specialize in building scalable applications, ensuring high performance and efficiency through robust system architectures. I focus on problem-solving and writing clean, maintainable code with an emphasis on Test-Driven Development (TDD) to ensure reliability and minimize defects. My expertise includes designing and optimizing databases, integrating AI solutions, and contributing to open-source projects. I am passionate about creating impactful software that enhances user experiences and delivers effective, sustainable solutions.

Maneet Goyal

### About Me 👋 * **Maneet Goyal | Full-stack Engineer (7+ years)** * Expert in React, TypeScript, Node.js, AWS/GCP. * I build fast, reliable, user-friendly products. What I’ve Delivered =================== * Real-time analytics dashboards and **ML-powered insights** that sped up decision-making * Embeddable **fintech widgets** that lifted conversions and reduced infra costs * End-to-end features with designers, PMs, and data teams; mentoring and technical leadership How I Work ========== * Solid architecture: clean boundaries, typed contracts, smart caching * Performance focus: Core Web Vitals, code-splitting, server rendering * Pragmatic security & accessibility that meets enterprise standards Dev Experience I Care About =========================== * Testing strategies that catch regressions early * CI/CD that makes releases **boringly reliable** * Documentation that keeps team velocity high ### Specialization in Data Parsing: * **AST & codebase parsing:** Built an Electron-based AST parser that scans large frontend repos to measure design-system adoption, detect deprecated/custom components, and report usage trends. Supports React/Angular/Svelte/Vue and parses JS, JSX, TS, TSX, CSS, JSON, and HTML; powered by **ts-morph** with CLI via Commander. * **Design tokens & UI component extraction:** End-to-end routines to identify component imports, prop usage, and token references across multi-package workspaces; outputs actionable summaries for designers and engineers. * **Specification & schema work:** Designed custom JSON specifications and data models to persist, validate, and share visualization states and lab data - grounding parsers in strict schemas for reliability. * **Chart/data preprocessing pipelines:** Authored d3-based preprocessing for raw datasets (histograms, heat maps, graph layouts) and mapped bespoke schemas to third-party chart specs, ensuring fast, predictable parse → transform → render loops. * **HTML scraping & normalization:** Implemented Playwright + Cheerio flows to parse ecommerce pages, normalize heterogeneous DOM structures, and transform results for interactive dashboards and exports. * **Operationalized parsing in products:** Applied these parsers across real apps - compliance graph explorers, ML evaluation dashboards, trading visualizations - tying parsed inputs to dependable UIs and APIs. * **PDF**: structured extraction of text and tables across pages (including rotated text, merged cells, headers/footers), with optional OCR for scanned documents and careful preservation of layout cues. * **CSV/XLSX**: automatic delimiter/encoding detection, schema and type inference, date/number normalization, multi-sheet and named-range handling, formulas → values, and large-file chunking. Value You Get ============= Ownership, clear communication, and software that moves the metrics that matter - delivered with polish and maintainability.

Aswin Murugesh

Programmer and a Technical lead with hands on experience in Python, Javascript, Django for the past 5 years. I also have a good amount of DevOps experience.

Zuber Alam

Zuber is always looking to explore new technology stacks and frameworks. He is a C.T.O level experienced developer.His ability to understand complex business logics has helped many clients all over the globe to build scalable businesses. He loves to talk about new cuisines, new travel destination and books.

Emmanuel Bartile Kapkusum

`Typescript (Javascript), Python (Django)`, `PHP (Laravel, Wordpress)`, `Flutter (Dart) and` `3X Certified Salesforce Consultant` `(Dart)` with 5+ years dedicated expertise in end-to-end application development. Proficient in harnessing Python frameworks including Django, Flask, Pandas, Tensorflow, and Microservices. Skilled in AWS, GCP, Heroku Cloud platforms, combined with frontend expertise in NextJs, React.js. Well-versed with databases like MySQL, PostgreSQL, MySQL, and MongoDB. Utilizes robust communication and collaboration capabilities to ensure projects resonate with client goals efficiently and sustainably. `**Key Strengths & Qualifications:**` * **Full Stack Expertise:** Proficient in frontend and backend development, with a focus on creating seamless user experience and scalable server-side applications. * **Backend Mastery:** Extensive experience in Python language programming, enabling the development of efficient and maintainable backend systems, Restful APIs, and microservices using Django, Flask, TensorFlow, LLAMA and Numpy. * **Frontend Proficiency:** Skilled in modern frontend technologies, including JavaScript ES6, React, Angular and Vue, allowing for the creation of responsive and user-friendly interfaces. * **Database Management:** Experienced in designing and optimizing databases on PostgreSQL & Oracle, to ensure data integrity and high-performance data retrieval. * **Cloud Expertise:** Proficient in deploying applications on major cloud platforms such as AWS, Azure, and GCP, with knowledge of containerization (Docker, Kubernetes). I'm well-versed in a broad range of AWS services, including EC2, S3, Lambda, and VPC. My responsibilities have encompassed designing scalable architectures, implementing security best practices with IAM, and optimizing cost and performance across cloud resources. I have hands-on experience deploying and managing containerized applications using Docker and Kubernetes. This includes setting up Kubernetes clusters. My work ensures high availability and scalability of microservices architectures.