24 Best Mid Level Sencha Ext JS JavaScript MongoDB Software Freelance Contractor United States Developers For Hire In October 2025

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selected:

Mid Level [ x ] Sencha Ext JS [ x ] JavaScript [ x ] MongoDB [ x ] software [ x ] freelance [ x ] contractor [ x ] United States [ x ]

framework:

+ Node JS (23) + Express JS (22) + jQuery (16) + Angular JS (12) + D3 JS (9) + Vue JS (9) + Svelte JS (6)

language:

+ TypeScript (23) + Vanilla JS (16) + Python (11)

utility:

+ JSON (23) + Redux JS (8) + GraphQL JS (7) + Jest JS (5)

ui:

+ CSS (12) + EJS (8) + SASS (6) + Tailwind CSS (5)

career:

+ Senior (11) + Junior (10)

stack:

+ Front End (21) + Full Stack (21) + Back End (17)

db:

+ SQL (15) + MySQL (9) + Postgres (PostgreSQL) (8)

server:

+ AWS (11) + Amazon SES (5) + docker (5) + Google Cloud (5)

program:

+ Git (19) + Jira (8)

concept:

+ OOP (13) + HTML (12) + api (7) + database (7) + Rest API (7) + Agile (5)

speaking:

+ Spanish (6)

worker type:

+ full time (21)

us state:

+ California (6) + New York (5)

Filters:

selected:

Mid Level [ x ] Sencha Ext JS [ x ] JavaScript [ x ] MongoDB [ x ] software [ x ] freelance [ x ] contractor [ x ] United States [ x ]

framework:

+ Node JS (23) + Express JS (22) + jQuery (16) + Angular JS (12) + D3 JS (9) + Vue JS (9) + Svelte JS (6)

language:

+ TypeScript (23) + Vanilla JS (16) + Python (11)

utility:

+ JSON (23) + Redux JS (8) + GraphQL JS (7) + Jest JS (5)

ui:

+ CSS (12) + EJS (8) + SASS (6) + Tailwind CSS (5)

career:

+ Senior (11) + Junior (10)

stack:

+ Front End (21) + Full Stack (21) + Back End (17)

db:

+ SQL (15) + MySQL (9) + Postgres (PostgreSQL) (8)

server:

+ AWS (11) + Amazon SES (5) + docker (5) + Google Cloud (5)

program:

+ Git (19) + Jira (8)

concept:

+ OOP (13) + HTML (12) + api (7) + database (7) + Rest API (7) + Agile (5)

speaking:

+ Spanish (6)

worker type:

+ full time (21)

us state:

+ California (6) + New York (5)

Timezone:

(includes +1/-1 hour)

Featured Mid Level Sencha Ext JS JavaScript MongoDB Software Freelance Contractor United States Developers

1 to 20 of 24 devs ( view all 1694 devs )

Lead Software Engineer

Lewis Center, Ohio, US or remote

Lead software engineer in Lewis Center, OH. I specialize in full-stack dev with React, Java, Ruby on Rails and more. I'm an AWS wizard with expertise...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript angular

Software Developer

New York, New York, US or remote

Software Developer - Zeplin: Architected and implemented reusable UI components using React.js, reducing development time by 25%. Conducted...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node nextjs express

Software Engineer

Providence, Rhode Island, US or remote

Northrop Grumman | Middletown, RI | Feb 2017 – Present Seaware LMS - Learning Management System for US Navy ● Developed for a Learning...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript angular

Software Engineer

Phoenix, Arizona, US or remote

Dermoscopic Image Classification - An implementation of the U-Net segmentation model applied to skin lesion classification in order to get binary...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react typescript angular nextjs

Software Engineer

National City, California, US or remote

I've been working as a software developer for my current job for more than 6 years, and before that, a startup for a couple years where I work on...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript angular

Software Engineer and Architect

greenbrae, California, US or remote

Dayton Financial - Quoting System Developer Built a complete quoting software that saved thousands in operational costs by replacing complex...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript nextjs

Full Stack Software Engineer

Miami, Florida, US or remote

Juice Finance: • Led the development and test launch of both the omega.xyz landing page and the app.omega.xyz lending platform using Next.js,...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript jquery

Software Developer

Concord, New Hampshire, US or remote

I’ve worked with numerous startups, small businesses and individuals during my 12 year career in every capacity from consulting and freelancing to...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript nextjs

Software Engineer

San Diego, California, US or remote

Fashionphile (Remote) Software Engineer | Feb. 2022 ‑ May 2023 Maintained and enhanced features in the checkout process using React,...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript vue

Software Engineer

Columbus, Ohio, US or remote

Express • Columbus, Ohio • 08/2021 - 08/2023 Associate ECommerce Engineer (React) - Contributed to the successful integration of the 'Save...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript angular

Software Engineer

Washington, District of Columbia, US or remote

WORK EXPERIENCE Applied Materials | Lead Software Engineer ▪ Independently developed a D3-Charts library using TypeScript and React functional...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript angular

Software Engineer

Westminster, Colorado, US or remote

Most recently I’ve created a coupon tracking app for a chain that does offer it. I utilized Google Vision API to extract data from users image...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript jquery

Full Stack Software Engineer

Rahway, New Jersey, US or remote

- Created lambda functions using Python to connect with SQL Server Management Studio (SSMS) to retrieve data, organize it, and send it as emails....

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript vue

Software Developer

New York, New York, US or remote

Software engineer with over a decade of full-stack experience at a number of companies of diverse size, tech stack, culture, and team structure, with...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript angular

Software Engineer

Redlands, California, US or remote

Remedy Health Media 01/22 – present Software Engineer Arlington, VA • Leveraged JavaScript, React, and Next.js to execute server-side rendering...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript jquery

Software Engineer

New York City, New York, US or remote

Full Stack Software Engineer experienced in AWS, Ruby on Rails, TypeScript, Elm, and PostgreSQL. I specialize in crafting efficient, scalable web...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript angular

Software Engineer

NYC, New York, US or remote

Full Stack Engineer Institute of Taxation and Economic Policy - Worked on website and internal tools used to model the effects of taxation...

Mid Level Sencha Ext JS JavaScript MongoDB software freelance contractor United States react node typescript vanilla js

Apprentice Web Developer

Boston, Massachusetts, US or remote

I learned JavaScript while working as a general manager across multiple retail brands. Recently, I attended an accelerated learning program, Launch...