176 Best Front End Sencha Ext JS JSON Freelance Contractor North America Developers For Hire In August 2025

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selected:

Front End [ x ] Sencha Ext JS [ x ] JSON [ x ] freelance [ x ] contractor [ x ] North America [ x ]

framework:

+ Node JS (170) + Express JS (145) + jQuery (102) + Angular JS (65) + Vue JS (63) + D3 JS (45) + Svelte JS (29) + React Native (24)

language:

+ TypeScript (167) + Vanilla JS (144) + JavaScript (140) + Python (92) + Java (46) + C# (37) + PHP (37) + Ruby (19)

utility:

+ Three JS (51) + Redux JS (37) + GraphQL JS (36) + Jest JS (36) + Cypress JS (15)

ui:

+ CSS (99) + EJS (63) + Tailwind CSS (42) + bootstrap (32) + SASS (29)

career:

+ Junior (93) + Mid Level (88) + Senior (76) + Manager (19) + CTO (8)

stack:

+ Full Stack (149) + Back End (111)

db:

+ MongoDB (129) + SQL (98) + Postgres (PostgreSQL) (52) + MySQL (41) + Firebase (21) + NoSQL (14) + Redis (13) + DynamoDB (8) + SQLite (6)

server:

+ AWS (50) + docker (46) + Linux (23) + Google Cloud (14) + AWS S3 (12)

program:

+ Git (132) + Jira (52) + GitHub (43) + Figma (25) + Postman (14) + VS Code (14) + Elastic (7) + Prisma (7) + Adobe Photoshop (5)

concept:

+ HTML (91) + software (73) + OOP (57) + api (50) + Rest API (49)

speaking:

+ English (175) + Spanish (21) + French (10) + Chinese (7) + Japanese (6) + Portuguese (5) + Russian (5)

worker type:

+ full time (156)

us state:

+ California (32) + New York (18) + Texas (11) + Florida (10) + Washington (7) + Illinois (6) + Massachusetts (5)

country:

+ United States (138) + Canada (35)

Filters:

selected:

Front End [ x ] Sencha Ext JS [ x ] JSON [ x ] freelance [ x ] contractor [ x ] North America [ x ]

framework:

+ Node JS (170) + Express JS (145) + jQuery (102) + Angular JS (65) + Vue JS (63) + D3 JS (45) + Svelte JS (29) + React Native (24)

language:

+ TypeScript (167) + Vanilla JS (144) + JavaScript (140) + Python (92) + Java (46) + C# (37) + PHP (37) + Ruby (19)

utility:

+ Three JS (51) + Redux JS (37) + GraphQL JS (36) + Jest JS (36) + Cypress JS (15)

ui:

+ CSS (99) + EJS (63) + Tailwind CSS (42) + bootstrap (32) + SASS (29)

career:

+ Junior (93) + Mid Level (88) + Senior (76) + Manager (19) + CTO (8)

stack:

+ Full Stack (149) + Back End (111)

db:

+ MongoDB (129) + SQL (98) + Postgres (PostgreSQL) (52) + MySQL (41) + Firebase (21) + NoSQL (14) + Redis (13) + DynamoDB (8) + SQLite (6)

server:

+ AWS (50) + docker (46) + Linux (23) + Google Cloud (14) + AWS S3 (12)

program:

+ Git (132) + Jira (52) + GitHub (43) + Figma (25) + Postman (14) + VS Code (14) + Elastic (7) + Prisma (7) + Adobe Photoshop (5)

concept:

+ HTML (91) + software (73) + OOP (57) + api (50) + Rest API (49)

speaking:

+ English (175) + Spanish (21) + French (10) + Chinese (7) + Japanese (6) + Portuguese (5) + Russian (5)

worker type:

+ full time (156)

us state:

+ California (32) + New York (18) + Texas (11) + Florida (10) + Washington (7) + Illinois (6) + Massachusetts (5)

country:

+ United States (138) + Canada (35)

Timezone:

(includes +1/-1 hour)

Featured Front End Sencha Ext JS JSON Freelance Contractor North America Developers

1 to 20 of 176 devs ( view all 1667 devs )

Software Engineering, Architecture & Management

Dallas, Texas, US or remote

Starting his technical career in 2011, Ryan has been exposed to virtually all aspects of software engineering. Working exclusively at companies with...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript angular

US-based web and mobile app team

Boulder, Colorado, US or remote

I'm the owner of Uplift, a Boulder, CO-based product and engineering team specializing in building products, from prototypes to high-quality software...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript vue

Engineering Product Manager

Los Gatos, California, US or remote

Experienced Senior Software Engineer with a proven track record in building scalable applications. Accomplished Product Manager adept at steering...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript vue

Senior Front-end Engineer

Los Angeles, California, US or remote

# Professional Experience ## Lead Front-end Engineer, Imarc (2020 – 2023) Built marketing and internal websites for Breezeline, eRegulations,...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript vue

Lead Software Developer

Spanish Fork, Utah, US or remote

- Quantum Computing and AI Web Developer with extensive experience in leading the design and development of innovative quantum computing applications...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript vanilla js

Full Stack | Front End | Senior Software Engineer | Agile Product Owner | USA

Scranton, Pennsylvania, US or remote

10 years of professional experience developing software in Javascript, Python, and React. Certified as an Agile Product Owner by the Scrum Alliance....

Front End Sencha Ext JS JSON freelance contractor North America react node typescript jquery

Senior React/Typescript Developer

Seattle, Washington, US or remote

SpaceMadness - spacemadness.dev Created web content stack with Sanity and Astro to help people create and customize their own digital gardens...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript vue

Senior Web Developer

Austin, US or remote

Senior Web Developer Disney+, Remote (03/2022 - 11/2022) • Technologies: React, TypeScript, JavaScript, Jest • Led project for a new...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript jquery

Senior Full Stack Developer

Ontario, Canada or remote

As a Senior Software Engineer at Reddit Inc., I led the development of a telemetry project aimed at enhancing user engagement insights. This project,...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript angular

Senior Full Stack Developer

Madison, Wisconsin, US or remote

True end-to-end developer with strong frontend, backend, and devops chops. 11+ years working with clients such as Yale University, UW, NWF, The...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript angular

Senior Software Engineer

Boston, Massachusetts, US or remote

I worked with an early stage crypto token startup on finishing and launching their MVP after the existing developer left the project. I joined an...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript angular

Senior Fullstack Web Application Engineer

Saint Paul, Minnesota, US or remote

Having worked with a variety of teams, from Best Buy to UHG to Dapper Labs, I have learned what makes for failure, friction, or success, both for the...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript vue

Senior Software Engineer specialized in AI and Blockchain

Burnaby, British Columbia, Canada or remote

Andrew is a seasoned professional with over 9 years of expertise in the field of React development. He is very familiar with a wide range of...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript angular

Senior Software Engineer

New York, New York, US or remote

I'm a full stack software engineer with over 15 years of experience. In my career, I've been an individual contributor, sole developer, and manager...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript vue

Frontend / Fullstack Developer Expert in UI Development

Albuquerque, New Mexico, US or remote

I've worked on specification and developing prototype applications for fortune 100 companies. I've created motion graphics in JavaScript for...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript jquery

Chief Technology Officer

Bronx, New York, US or remote

Co-founded & CTO of 2 tech startups 10 Years of experience as full stack developer Creative Technologist with AR/VR...

Front End Sencha Ext JS JSON freelance contractor North America react node jquery vanilla js

Software Engineer

Toronto, ON, Canada or remote

Computer science graduate with 8+ years of experience. I am looking to join to startup team with whom communication and teamwork are paramount. Have...

Front End Sencha Ext JS JSON freelance contractor North America react node typescript angular