
Avram Eisner
Verified Expert in Engineering
Front-end Web Developer
Seattle, WA, United States
Toptal member since June 4, 2020
Passionate about the web, Avram's been working as a front-end developer for several years. Where Avram’s value to a project is most evident is in his ease in collaborating with designers to bring their designs to life and in developing complex single-page apps in React and Redux. However, recently, he’s also been intrigued in the potential of Svelte and Sapper to combine server-side with client-side rendering. When you work with Avram, you can expect to receive quality code delivered on time.
Portfolio
Experience
- CSS - 20 years
- JavaScript - 20 years
- HTML5 - 20 years
- React - 10 years
- Express.js - 5 years
- Node.js - 5 years
- Jest - 5 years
- Redux - 4 years
Preferred Environment
Git, Visual Studio Code (VS Code), Express.js, Node.js, Webpack, Claude Code, AI Tools
The most amazing...
...thing I've built is a 3D Tetris clone using WebGL. You can play it at my GitHub page (Avrame.github.io/3D-Tetris).
Work Experience
Senior Front-end Web Developer
Hazel Health
- Built and launched a React and TypeScript clinical form system that reduced therapist evaluation time by 30%, improving patient throughput and data accuracy.
- Collaborated with designers to develop a React-based calendar interface for scheduling and tracking mental health visits, streamlining weekly planning for school coordinators.
- Worked closely with back-end engineers to design and build an interface for handling insurance verification requests.
Senior Front-end Web Developer
Persefoni
- Delivered the Scope 3 emissions data exchange tool, enabling companies to automate supplier data collection and sustainability reporting.
- Built reusable chart, graph, and table components for Kore UI, Persefoni’s internal design system, improving product consistency and developer velocity.
- Consolidated data-fetching and i18n code into shared packages within the monorepo, reducing duplication and improving maintainability.
Senior Front-end Web Developer
D-Wave
- Acted as a front-end developer for the new Leap Admin portal, simplifying project and user management for the quantum computing platform.
- Created an accessible React component library using functional components and hooks.
- Implemented front-end security best practices to mitigate XSS and injection vulnerabilities.
- Wrote comprehensive unit tests, reducing regressions and improving release confidence.
Front-end Engineer
Verizon Media
- Built an augmented reality web app for authoring and sharing 3D AR content.
- Migrated the codebase from JavaScript to TypeScript, improving stability and developer experience.
- Developed utilities to pack GLTF and unpack GLB 3D model files.
Front-end Web Developer
Disney
- Rewrote the OneID account system, which is used across all Disney subsidiaries, in React and Redux.
- Used Jira to track and fix bugs with the old OneID account system written in Angular 1.3.
- Collaborated with different teams to deliver a new functionality localized in over a dozen different languages.
Front-end Web Developer
Level 11
- Built a sophisticated map-based web app that monitors vaccine refrigerators in Nigeria. Temperature data was collected and transformed into charts, graphs, and map overlays.
- Worked directly with clients to quickly iterate on the design and functionality.
- Increased performance of a complex web app and fixed numerous bugs.
Front-end Web Developer
Flexe, Inc.
- Spearheaded Flexe’s new React-based internal admin tool for the operations team, reducing data-entry errors, and time needed to create warehouse reservations for customers.
- Moved the new admin tool to Google Cloud with automatic deployments, streamlining the deployment pipeline.
- Added RESTful routes to the Ruby on Rails application, allowing for the creation of a new admin front end built in React.
Senior Web Developer
Mobiquity, Inc.
- Learned quickly to work with Angular and React on the job.
- Leveraged my knowledge of responsive web development to create websites and web apps that work on all screen sizes.
- Built a medical survey app for Amazon's voice-enabled service, Alexa.
Front-end Web Developer
Expedia
- Built and tested front-end code for Expedia's mobile website. Backbone.js was used to create reusable interactive components throughout the site.
- Developed a library of JSP tags that formed a front-end UI toolkit—giving back-end developers throughout the company the ability to create clean, standards-compliant pages.
- Wrote a complete suite of unit tests for the UI Toolkit framework, including Jasmine tests for JavaScript and JUnit tests for Java components.
Experience
Nestlé's GoodNes Alexa Skill with Accompanying Website
Vaccine Refrigerator Monitoring Web App
https://www.intellectualventures.com/what-we-do/global-good-fundThe web app was built in React and Redux and uses MapBox for displaying a map of the country. The user can zoom in and out of the map to see average temperature fluctuations layered over the different states and regions. Temperature data is also provided in a table and a chart to show changes over time.
Operations Web App
I created the new web app using React on the front end, and Node.js/Express.js on the back end. The Express.js app would act as a middle layer between the front end and the Ruby on Rails app. I also wrote new API endpoints in the Ruby on Rails app that returned JSON for the middle layer.
Education
Bachelor's Degree in Informatics
University of Washington - Seattle, WA, United States
Skills
Libraries/APIs
React, Node.js, Redux-Saga, Backbone.js
Tools
Git, Claude Code, Figma, Webpack
Languages
JavaScript, TypeScript, HTML5, CSS, HTML, ECMAScript (ES6), GraphQL, Java, Python 3
Platforms
Visual Studio Code (VS Code), Mapbox, Amazon Web Services (AWS)
Frameworks
Redux, Jest, Express.js, Deck.gl, Ruby on Rails (RoR), Angular, Jakarta Server Pages (JSP), Next.js
Other
Front-end, User Interface (UI), UI Components, User Experience (UX), AI-assisted Development, AI Tools, CSS-in-JS, Information Architecture (IA), Radix UI, Zustand
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