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Hello nice to e-meet you, My name is Kevin Herrbach, I am a french software engineer graduated in 2017 from one of the top CS school in France. I worked more than 8 years as a fullstack engineer both as a freelancer (3 years) and as a regular employee. I am looking for freelancing opportunities, I am an expert in JS full stack development, cloud architecture (AWS). I adapt very fast and very well to new environments, and I put a strong point of honor into delivering readable and clean code.…Hello nice to e-meet you, My name is Kevin Herrbach, I am a french software engineer graduated in 2017 from one of the top CS school in France. I worked more than 8 years as a fullstack engineer both as a freelancer (3 years) and as a regular employee. I am looking for freelancing opportunities, I am an expert in JS full stack development, cloud architecture (AWS). I adapt very fast and very well to new environments, and I put a strong point of honor into delivering readable and clean code.

Kevin Herrbach

Full Stack Developer

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Hello nice to e-meet you, My name is Kevin Herrbach, I am a french software engineer graduated in 2017 from one of the top CS school in France. I worked more than 8 years as a fullstack engineer both as a freelancer (3 years) and as a regular employee. I am looking for freelancing opportunities, I am an expert in JS full stack development, cloud architecture (AWS). I adapt very fast and very well to new environments, and I put a strong point of honor into delivering readable and clean code.…Hello nice to e-meet you, My name is Kevin Herrbach, I am a french software engineer graduated in 2017 from one of the top CS school in France. I worked more than 8 years as a fullstack engineer both as a freelancer (3 years) and as a regular employee. I am looking for freelancing opportunities, I am an expert in JS full stack development, cloud architecture (AWS). I adapt very fast and very well to new environments, and I put a strong point of honor into delivering readable and clean code.

Available to hire

Seoul, South Korea

Hello nice to e-meet you,

My name is Kevin Herrbach, I am a french software engineer graduated in 2017 from one of the top CS school in France.
I worked more than 8 years as a fullstack engineer both as a freelancer (3 years) and as a regular employee.

I am looking for freelancing opportunities, I am an expert in JS full stack development, cloud architecture (AWS).

I adapt very fast and very well to new environments, and I put a strong point of honor into delivering readable and clean code.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

Korean

Fluent

English

Fluent

French

Advanced

Work Experience

Full Stack Mobile Software Engineer at Asiance Korea

September 1, 2022 - Present

Built a SaaS product from scratch for luxury brands (LV, Céline, Tag Heuer) generating hundreds of millions of Korean won in revenue. Scaled the system from hundreds to 10,000 requests per second using AWS serverless tech (API Gateway, Lambda, DynamoDB, SQS) while maintaining 99%+ availability. Engaged with C‑level stakeholders (CTO LVHM Asia, General Manager Puig) on technical strategy and delivery. Developed a React/TypeScript dashboard enabling clients to interact with large datasets. Built a data lake (S3, AWS Glue, AWS Athena) to optimize data processing. Implemented SSO login flows with Okta and AWS Cognito for secure authentication.

Full Stack Mobile Software Engineer at AVA Entertainment

August 1, 2022 - October 3, 2025

Single‑handedly managed development of a mobile app used by Korean celebrities and thousands of fans, serving as the sole technical resource for iOS (Swift), Android, and the PHP CodeIgniter backend, as well as production server management. Rebuilt the app from scratch using Flutter, reducing the codebase by 50% and significantly improving code quality and maintainability. Developed NFT smart contracts in Solidity on the Klaytn blockchain, enabling mobile‑app users to interact with them.

Full Stack Software Engineer at DGAC (French Government Civil Aviation Directorate)

May 1, 2021 - October 3, 2025

Fixed performance issues by developing optimized algorithms in PHP, enabling the software to be deployed on new aviation centers. Led the transition from vanilla JavaScript to Vue.js on the frontend and taught the team the framework’s core principles. Built CI pipelines from developers’ local environments to a staging environment to streamline deployments.

Full Stack Software Engineer at The Price Hub

June 1, 2018 - October 3, 2025

3‑month mission as a full‑stack React, NestJS, PHP engineer in a finance company. Improved overall codebase readability and migrated legacy modules from CodeIgniter to NestJS, enhancing maintainability and scalability. Developed a 1‑month end‑to‑end promotional page, including a Symfony cron job to process weekly data; the campaign attracted hundreds of users and generated tens of thousands of USD in deposits. Led front‑end development for a Copy Trading feature on the company’s crypto platform, enabling users to automatically replicate trades from experienced traders.

Full Stack Software Engineer at LVMH Asia (Client project)

September 1, 2022 - Present

Built from scratch a SaaS product for luxury brands, scaled to 10,000 requests per second using serverless AWS (SAM, API Gateway, Lambda, DynamoDB, SQS); developed reusable React + TypeScript dashboard; created data lake with S3, AWS Glue, Athena; implemented SSO via Okta and Cognito; engaged with C-level stakeholders.

Full Stack Mobile Software Engineer at AVA Entertainment

August 1, 2022 - October 3, 2025

Single-handedly developed a mobile app used by Korean celebrities and fans; supported iOS (Swift), Android, PHP CodeIgniter backend, and production server management; rebuilt app from scratch with Flutter, reducing codebase by 50%; developed NFT Smart Contracts in Solidity on the Klaytn blockchain.

Full Stack Software Engineer at DGAC (French Government Civil Aviation Directorate)

May 1, 2021 - October 3, 2025

Fixed performance issues by optimizing PHP algorithms; migrated frontend to Vue.js; built CI pipelines from local to staging environments; collaborated with teams.

Software Engineer (Intern) at The Price Hub

June 1, 2018 - October 3, 2025

Improved codebase readability; migrated legacy modules from CodeIgniter to NestJS; improved maintainability and scalability.

Fullstack Mobile Software Engineer at AVA Entertainment

August 1, 2022 - October 3, 2025

Single-handedly developed a mobile app used by Korean celebrities and thousands of fans; supported iOS (Swift), Android, PHP CodeIgniter backend, and production server management.

Fullstack Software Engineer at DGAC (French Government Civil Aviation Direction)

May 1, 2021 - October 3, 2025

Fixed performance issues by developing optimized PHP algorithms; migrated from vanilla JavaScript to Vue.js; built CI pipelines; implemented a data lake with S3, Glue, and Athena; implemented SSO login flows for Okta and AWS Cognito.

Fullstack Software Engineer at The Price Hub

June 1, 2018 - October 3, 2025

Improved overall codebase readability and migrated legacy modules from CodeIgniter to NestJS, enhancing maintainability and scalability.