Sylvain Guillard

Postumo Start Up CTO, responsible for building the web application (IA with client and admin interfaces).

Key responsabilities:

- Building website architecture (with DEV & TEST & PROD environments)

- Create UI and UX design with its Front end implementation

- Develop a complex back End API to reach the need of the IA

Technologies used:

- Architecture Infrastructure: AWS Route 53 + AWS RDS + AWS Cognito + AWS SNS + AWS SES + AWS CloudWatch + AWS IAM. Deployment with Vercel (Serverless AWS Lambda and S3).

- Front End: Next JS + Typescript + React JS + Tailwind CSS

- Back End: Next JS + Typescript + Node JS + Postgres + Prisma (ORM) Outcomes:

- Delivery of a fully functional web application: https://app.postumo.fr/

Responsible for developing BackEnd and FrontEnd Solutions in teams of 2 to 5 developers following Agile methodology.

Key Responsibilities:

- Design and develop optimised high-quality solutions on both front end and back end using the most adapted technologies and frameworks.

- Perform code reviews to insure code quality and consistency throughout the codebase (100% immutability, performance, simplicity). Write integration tests.

Typescript technologies used: Back End:

- NodeJs - Prisma - Nexus - Hasura - PostgreSql - Next JS

- REST + GraphQl API Front End:

- Recoil - Redux - URQL - React-Testing-Library - Sass Outcomes:

- Delivery of a fully functional web application used by one of the biggest NZ company in the agricultural business.

- Delivery of a marketing web application prototype.

In charge of implementing new features and resolving bugs in a company of 20+ developers working on a B2B software. Acted as a link between Back End and Front End developers in a Scrum Team of 8 people, designing and developing PHP API as well as its React implementation.

Key Responsibilities:

- Understand a 10+ years codebase legacy written in PHP and Javascript and propose solutions to migrate to a REST API with a React Front End.

- Make sure that Back end and Front End developers are in sync, and code the solutions following best practices.

- Write the tests associated (unit + integration).

- Follow the tickets until QA testing is done and feature has been merged.

Technologies used:

Front End: React JS - Redux - Material UI - React Testing Library - React Table - React ORM - Saga Back End: Laravel / Mysql Outcomes:

- Successful delivery of one of the main features complete migration to the modern stack (API with React)

- Fix critical production bugs

- Implement highly complex features such as real time pub/sub server and its associated Front End logic