Ibrahim Kasoma.

By the numbers

• 6+

  Years building production

  TypeScript · React · Node

• 80+

  Frontend apps shipped

  Across all roles

• 7+

  EF projects in parallel

  Multi-brand consumer surfaces

• 3.4M+

  MAU on the flagship

  EF Next.js platform · 60+ markets

01 — Core skills

What I am fluent in.

• Frontend

  • React
  • Next.js
  • TypeScript
  • JavaScript (ES6+)
  • Gatsby
  • Redux
  • React Query
  • Tailwind CSS
  • CSS3

• Backend & APIs

  • Node.js
  • Express
  • REST
  • GraphQL
  • API Integration

• Cloud & Delivery

  • AWS (S3, CloudFront)
  • GitHub Actions
  • Vercel
  • Docker
  • Release Automation

• Architecture & Tooling

  • Nx Monorepos
  • Micro-frontends
  • Webpack
  • Vite
  • Storybook
  • Component Libraries

• Testing & Reliability

  • Jest
  • React Testing Library
  • Cypress
  • Sentry
  • Observability

• Platforms

  • GCP
  • Storyblok
  • Contentful
  • Sanity
  • Headless CMS

02 — Selected Work

Public surfaces I have shipped.

• 2026

  EF EPI — English Proficiency Index

  Senior Frontend Engineer · Data Visualization

  −60% page load · 3.4M MAU · 57 markets

  EF’s flagship data-viz platform — the English Proficiency Index. A Next.js application serving 57 international markets and 3.4M monthly users. I cut page load times by 60% and improved Core Web Vitals across all three.

  • Next.js
  • TypeScript
  • Data Viz
  • Web Vitals
  • ef.com

  →
• 2025

  EF Homepage — ef.com

  Senior Frontend Engineer · Brand surface

  60+ markets · daily releases

  EF’s global homepage — Language. Education. Travel. Helped scale a shared platform behind the consumer brand surfaces, with daily multi-region releases on a CI/CD platform deploying 17 production frontend apps.

  • Next.js
  • TypeScript
  • CMS
  • Edge Cache
  • ef.com

  →
• 2024

  EF Programs — All EF programs

  Frontend Architecture · Microfrontends

  20+ MFEs · −15k LOC · 8 teams

  The global catalog of EF’s language and travel programs. Architected the Nx monorepo that consolidated 20+ microfrontends across 8 product teams — eliminated 15,000+ lines of duplicate code and unified releases behind a single shared pipeline.

  • Next.js
  • Nx
  • TypeScript
  • Microfrontends
  • ef.com

  →

03 — Showcase

Things I built and shipped, outside of EF.

Side projects and freelance builds with public live deploys. Each one was shipped end to end — design, build, deploy, iterate.

• Design Systems · Storybook01

  comp-lib — Component library lab

  A personal design-system playground in Storybook — primitives, motion, theming, and accessibility patterns. The kind of internal lab that keeps a senior frontend engineer sharp on the basics.

  • React
  • TypeScript
  • Storybook
  • Tailwind
  Live site↗Repo↗complib.kasomaibrahim.dev
• DevOps · Dashboards02

  DevOps Insights — Real-time dashboard

  Real-time monitoring dashboard for DevOps metrics across global regions. Charts, regional breakdowns, and signal-over-noise visual hierarchy.

  • Next.js
  • TypeScript
  • Charting
  • Tailwind
  Live site↗Repo↗devops.kasomaibrahim.dev
• AI · Education03

  Learner — Real-time AI teaching platform

  Real-time AI teaching platform with character-based companions and live learning sessions. An AI-native take on the tutor + classroom format.

  • Next.js
  • TypeScript
  • AI
  • Realtime
  Live site↗Repo↗learner.kasomaibrahim.dev
• Travel · CMS04

  Puur Uganda Reizen — Tailor-made safari trips

  Discover Africa with Puur Uganda Reizen — personal, tailor-made safari trips to Uganda and beyond. Editorial photography and a CMS-driven trip catalog built for storytelling.

  • Next.js
  • TypeScript
  • Tailwind
  • CMS
  Live site↗Repo↗puur-safaris.vercel.app
• Travel · Marketing05

  Oliotya Uganda Safaris — Discover Uganda

  Experience the Pearl of Africa — wildlife, mountains, gorilla trekking. A marketing site with rich content blocks, image galleries, and conversion-focused booking pathways.

  • Next.js
  • Tailwind
  • Image-led layout
  Live site↗Repo↗oliotyaugandasafaris.com
• Fashion · Catalog06

  IGCFashion — Multi-brand fashion catalog

  A fashion catalog with multi-brand product grids, category navigation, and an editorial layout — image-led product cards on a JavaScript stack.

  • JavaScript
  • Tailwind
  • Image-led
  Live site↗Repo↗igc.kasomaibrahim.dev

04 — How I work

Discover · Architect · Ship · Iterate.

A pragmatic loop. Each step ends with something that ships. Click a card to see how I think about it.

1. 01+

   Discover

   Sit with the problem before the keyboard. Read the code. Talk to users and to the people on either side of you.

2. 02+

   Architect

   Pick a path that survives a year of edits. Boring TypeScript, boring Postgres, boring component library, boring CI.

3. 03+

   Ship

   Small PRs, real feedback loops, real tests. Performance budgets and accessibility on day one — never bolted on.

4. 04+

   Iterate

   Watch the metrics that matter. Roll back fast. Pay down debt that slows the next person.

05 — Experience

Where I have worked, what I shipped there.

1. Mar 2023 — Present

   London, UK · Hybrid

   Senior Frontend Engineer · EF Education First

   • Shipping seven concurrent EF projects across 80+ frontend apps and 60+ markets — including the EPI, Homepage, and Programs surfaces.
   • Built and owned a shared CI/CD platform — pipeline 45 → 15 minutes, daily multi-region releases.
   • Cut page load times by 60% on a Next.js platform serving 57 international markets and 3.4M monthly users — improved Core Web Vitals across all three metrics.
   • Architected an Nx monorepo consolidating 20+ microfrontends across 8 product teams — eliminated 15,000+ lines of duplicate code.
   • Lifted test coverage from ~30% to 85% with Jest + React Testing Library — reduced production incidents by ~40%.
   • Mentored engineers through code reviews, shared standards, and architecture discussions.
2. Jun 2022 — Feb 2023

   Surrey, UK · Hybrid

   Frontend Engineer (Full-Stack JavaScript) · San Damiano Ltd

   • Built internal tooling with React, Node.js, and Express — increased employee productivity by ~40%.
   • Automated manual workflows end to end — 4 hours → under 5 minutes.
   • Designed and implemented REST APIs powering role-based frontend experiences for multiple internal user types.
3. Feb 2020 — Nov 2022

   London, UK

   React · JavaScript · Node.js · Freelance Web Application Developer

   • Delivered end-to-end web applications for multiple clients — managed requirements through production deployment.
   • Integrated third-party REST APIs and shipped production-ready releases with responsive, accessible frontends.
   • Translated business requirements into scalable technical solutions, balancing maintainability, usability, and delivery speed.

06 — Tech I reach for

Day-to-day tools.

A live, searchable view of the stack I lean on across product engineering, platform work, and personal projects.

JavaScriptTypeScriptReactNext.jsNode.jsExpressMongoDBPostgreSQLGraphQLReduxTailwind CSSSassGitJavaScriptTypeScriptReactNext.jsNode.jsExpressMongoDBPostgreSQLGraphQLReduxTailwind CSSSassGitJavaScriptTypeScriptReactNext.jsNode.jsExpressMongoDBPostgreSQLGraphQLReduxTailwind CSSSassGit

JestWebpackFirebaseAWSVercelFigmaHTMLCSSAppwriteChart.jsPlaidStripeJestWebpackFirebaseAWSVercelFigmaHTMLCSSAppwriteChart.jsPlaidStripeJestWebpackFirebaseAWSVercelFigmaHTMLCSSAppwriteChart.jsPlaidStripe

What I am up to right now.

• Shipping

  Seven concurrent EF projects across 60+ markets — including the EPI data-viz, the homepage, and the programs catalog.

• Building

  A platform CI/CD that ships 17 production frontend apps daily — and the Nx monorepo it sits on top of.

• Reading & writing

  Notes on platform engineering, design systems at scale, and the quiet revolution in AI-era tooling.

• Open to

  Senior frontend / platform roles in the UK. Strong product teams, real performance budgets, modern stack.

08 — About

Senior Software Engineer · TypeScript, React, Node.js.