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I’m a senior full-stack JavaScript/TypeScript engineer with 8+ years of experience building and evolving production web applications used daily by medical professionals. I focus on reliable, user-friendly, and maintainable systems—turning complex business workflows into scalable software with clean code and strong debugging practices. I design responsive, data-driven React interfaces with TypeScript, Redux Toolkit, and RTK Query, and I build robust Node.js/Express backends with REST APIs. I’ve implemented real-time features with WebSockets, worked with MongoDB/Mongoose and SQL (MySQL), and created advanced data visualizations using D3.js and SVG, while also integrating authentication/authorization using Keycloak, JWT, and OAuth 2.0. I enjoy collaborating in Agile teams and continuously improving the products I work on.…I’m a senior full-stack JavaScript/TypeScript engineer with 8+ years of experience building and evolving production web applications used daily by medical professionals. I focus on reliable, user-friendly, and maintainable systems—turning complex business workflows into scalable software with clean code and strong debugging practices. I design responsive, data-driven React interfaces with TypeScript, Redux Toolkit, and RTK Query, and I build robust Node.js/Express backends with REST APIs. I’ve implemented real-time features with WebSockets, worked with MongoDB/Mongoose and SQL (MySQL), and created advanced data visualizations using D3.js and SVG, while also integrating authentication/authorization using Keycloak, JWT, and OAuth 2.0. I enjoy collaborating in Agile teams and continuously improving the products I work on.

Augustin Popp Razanaparany

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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I’m a senior full-stack JavaScript/TypeScript engineer with 8+ years of experience building and evolving production web applications used daily by medical professionals. I focus on reliable, user-friendly, and maintainable systems—turning complex business workflows into scalable software with clean code and strong debugging practices. I design responsive, data-driven React interfaces with TypeScript, Redux Toolkit, and RTK Query, and I build robust Node.js/Express backends with REST APIs. I’ve implemented real-time features with WebSockets, worked with MongoDB/Mongoose and SQL (MySQL), and created advanced data visualizations using D3.js and SVG, while also integrating authentication/authorization using Keycloak, JWT, and OAuth 2.0. I enjoy collaborating in Agile teams and continuously improving the products I work on.…I’m a senior full-stack JavaScript/TypeScript engineer with 8+ years of experience building and evolving production web applications used daily by medical professionals. I focus on reliable, user-friendly, and maintainable systems—turning complex business workflows into scalable software with clean code and strong debugging practices. I design responsive, data-driven React interfaces with TypeScript, Redux Toolkit, and RTK Query, and I build robust Node.js/Express backends with REST APIs. I’ve implemented real-time features with WebSockets, worked with MongoDB/Mongoose and SQL (MySQL), and created advanced data visualizations using D3.js and SVG, while also integrating authentication/authorization using Keycloak, JWT, and OAuth 2.0. I enjoy collaborating in Agile teams and continuously improving the products I work on.

Available to hire

I’m a senior full-stack JavaScript/TypeScript engineer with 8+ years of experience building and evolving production web applications used daily by medical professionals. I focus on reliable, user-friendly, and maintainable systems—turning complex business workflows into scalable software with clean code and strong debugging practices.

I design responsive, data-driven React interfaces with TypeScript, Redux Toolkit, and RTK Query, and I build robust Node.js/Express backends with REST APIs. I’ve implemented real-time features with WebSockets, worked with MongoDB/Mongoose and SQL (MySQL), and created advanced data visualizations using D3.js and SVG, while also integrating authentication/authorization using Keycloak, JWT, and OAuth 2.0. I enjoy collaborating in Agile teams and continuously improving the products I work on.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Beginner

Beginner

Beginner

Language

French

Fluent

English

Intermediate

Malagasy

Fluent

Work Experience

Full-Stack JavaScript/TypeScript Engineer at Famelinks A-Switzerland

January 1, 2025 - January 1, 2026

Developed server-side rendered applications with Next.js and TypeScript, building responsive and scalable React interfaces using modern UI components and reusable patterns. Built Node.js/Express.js backend services and REST APIs. Worked with MySQL for application data management and database-driven features. (Also listed: GraphQL Apollo Server and WebSocket integration, plus Redis for data/application management.)

Full-Stack JavaScript/TypeScript Engineer at Fameli Ksa - Switzerland

January 1, 2025 - January 1, 2026

Developed server-side rendered applications using Next.js and TypeScript. Built responsive and scalable React interfaces using modern UI components and reusable patterns. Developed Node.js/Express.js backend services and REST APIs. Worked with MySQL for application data management and database-driven features. Implemented GraphQL APIs with Apollo Server and real-time capabilities using WebSockets. Integrated and used Redis where needed for application data management.

Senior Full-Stack JavaScript/TypeScript Engineer

January 1, 2020 - January 1, 2025

Designed and developed React applications used daily by medical professionals, focusing on reliability, usability, and maintainability. Built scalable Node.js/Express backends and REST APIs supporting complex business workflows. Implemented responsive, data-driven React interfaces with TypeScript, Redux Toolkit, and RTK Query, including real-time features using WebSockets. Worked with MongoDB and Mongoose for data modeling, querying, and application data management. Implemented advanced data visualization features with D3.js and SVG. Participated in frontend architecture decisions, code reviews, and technical improvements with strong emphasis on debugging and maintainable code. Implemented authentication and authorization using Keycloak, JWT, and OAuth 2.0.

Software Engineer

January 1, 2017 - January 1, 2018

Designed and developed a web-based time-tracking and access-control system. Implemented user identification, check-in/check-out tracking, access permissions, and attendance management. Developed admin features including attendance history and real-time monitoring. Integrated the web application with a database and electronic hardware components, focusing on reliability, security, and data traceability.

Software Engineer at Hairun Technology - Madagascar

January 1, 2017 - January 1, 2018

Developed complex data-driven React interfaces and reusable React components, contributing to frontend architecture improvements. Built Node.js backend services and GraphQL APIs using Apollo Server. Worked with MongoDB, Mongoose, and Redis for application data management. Implemented advanced data visualization using D3.js and SVG. Supported Docker-based development environments and collaborated in Agile Scrum teams.

Software Engineer (Intern) at Internship (employer not specified)

January 1, 2017 - January 1, 2018

Designed and developed a web-based time-tracking and access-control system. Implemented user identification, check-in/check-out tracking, access permissions, and attendance management. Built admin features including attendance history and real-time monitoring. Integrated the web application with a database and electronic hardware components, with an emphasis on reliability, security, and data traceability.

Education

Bachelor’s Degree in Computer Science, Electronics and Telecommunications Engineering at Institut Supérieur Polytechnique de Madagascar (ISPM)