William Holcman โ€”
Senior freelance developer โ€”
based in Paris - France 

๐Ÿ‡ซ๐Ÿ‡ท๐Ÿš€โœ‚๏ธ๐Ÿ”ฅ


specialized in javascript, nodejs, react, websocket, webgl, html/css and learning golang.

Combining technical & graphics skills, I provide creative front-end development, back-end development, prototypes and POC (proof of concept) to build digital experiences. Helping entrepreneurs, startups, agencies and studios โ€” craft amazing user experiences in France, UK and US.

I worked within multidisciplinary teams, squads and features teams with โ€”
developers, devops, designers and motion designers.


Formed at Merci-Michel, Firstborn NYC and FCINQ and a master degree at HETIC.


Also passionated by entrepreneurship. #business, #seo, #aso, #analytics, #marketingautomation, #growthhack, #scraping :)


๎‹๏ธŽ william.holcman at gmail.com
๎‹๏ธŽ 06 31 18 25 61




My last projects.



Chance ๎‹๏ธŽ See website ๎‚„๏ธŽ

#react #nextjs #framermotion

Leboncoin ๎‹๏ธŽ See website ๎‚„๏ธŽ

#react #100%coverage #rtl #next (dev of the contact feature team)

Frichti ๎‹๏ธŽ See website ๎‚„๏ธŽ

#react #nodejs #microservices #unittesting #payment (dev of the consumer squad)

Whaou ๎‹๏ธŽ See website ๎‚„๏ธŽ

#webgl #javascript

Virgin mobile ๎‹๏ธŽ See website๎‚„๏ธŽ

#websocket #coffeescript

Novotel ๎‹๏ธŽ See website ๎‚„๏ธŽ

#webgl #javascript

Milka ๎‹๏ธŽ See website ๎‚„๏ธŽ

#webgl #javascript

Volkswagen ๎‹๏ธŽ See website ๎‚„๏ธŽ

#canvas #javascript

Fnatic - Eyezen ๎‹๏ธŽ See website ๎‚„๏ธŽ

#webgl #game #facialrecognition





Teams told about me as a โ€œcouteau suisseโ€.
Iโ€™m used to adapt very quickly to any stack.


โ€ข Front-end
ReactJS - ES6/7+ - Typescript - SCSS - React Native - Next /Gatsby - Storybook - Parcel/Grunt/Gulp/Webpack
โ€ข Webgl
Threejs/PixiJS/Workers
โ€ข Back-end
Node.js, Websocket, Koa, Express, Rabbitmq, PHP
โ€ข Testing
Jest, Mocha, RTL, Enzyme
โ€ข Monitoring
Grafana, PM2, Prometheus, Datadog
โ€ข DevOps
AWS (EC2 - S3 - CloudFront - Lambda...), Docker, Kubernetes
โ€ข CI
Jenkins, PM2, Gitlab CI, Travis
โ€ข CMS
Wordpress, ContentFul
โ€ข E-commerce
Woocommerce, Shopify
โ€ข Analytics
GA, amplitude, segment
โ€ข Marketing automation
Puppeteer, phantombuster
โ€ข Design tools
Sketch, Photoshop, Figma, Zeplin



I've been fortunate to work with amazing clients. 






Frichti


leboncoin


Volkswagen


Virgin Mobile


Airbus group


Dassault systemes



Burger King


Veolia


Ubisoft


Fnatic


Leclerc





My projects have been published and recognized โ€”
by other digital experts in the industry several times.







#freelance #growth #hack #developer #engineer #javacript #react #reactjs #reactnative #nodejs #websocket #puppeteer #html #css #paris #france.

๎‹๏ธŽ william.holcman at gmail.com
๎‹๏ธŽ 06 31 18 25 61


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