Sophie Janson

Full Stack Developer — frontend-focused · The Hague, NL

About me

Customer Success turned Full Stack Developer, with a focus on frontend. For the past 7 years I've been building software used across a large share of Dutch schools. To me, good engineering isn't just building the thing right — it's building the right thing, and caring that the work has real societal impact.

Technology Stack

Experience

Full Stack Developer · LessonUp

2018 — Present

Developing and maintaining educational web applications used by teachers and students at scale. Working primarily with React, TypeScript, GraphQL and modern frontend architecture, while contributing across the full stack — backend APIs, performance optimization and product improvements.

  • Coordinated the delivery of several large features as a team lead, from planning through to production
  • Helped modernize legacy Meteor applications into React apps backed by a dedicated GraphQL API
  • Improved team development processes, introducing a more structured and reliable release workflow

Freelance Developer · sophiejanson.com

2022 — Present

Freelance full stack developer for web applications and digital products.

  • Designed and built a custom planning application end-to-end — frontend, backend and deployment
  • Delivered several business websites, built with React, TypeScript and Node.js
  • Worked directly with clients to scope, build and launch their products

Customer Success Executive · Usabilla

2015 — 2018

Responsible for customer relationship management, customer support, liaising with other departments, user onboarding, organizing training sessions and conducting user research.

Biggest success: for six months I worked with a standalone team to redesign the Usabilla product strategy.

Education

Full Stack Development Bootcamp · Codaisseur

2018

A 10-week intensive JavaScript-based bootcamp focused on full stack web development. Worked with developers and UX designers in collaborative projects, including building and shipping a Slack application.

International Business and Languages · Hogeschool Rotterdam

2014

Bachelor program including a digital marketing internship in South Africa and a semester abroad in Switzerland.