Engineering · Paris

Kofi Mensah

Platform engineer · streaming

Kofi teaches the layers under the frameworks: HTTP, types, and the cloud bill that lands at the end of each month.

Teaches in English
On Waypoint since December 2025

Verified Oct 20, 2025

TypeScript for backend servicesNov 2 · 5 seats left

Reserve

4.5

2,950 ratings

31,330

learners in 3 courses

About Kofi

Kofi has spent 12 years in platform engineering

Kofi runs the platform team at a video streaming service, and cut its cloud bill by a third in one year. He learned those layers on call, at a hosting company and then at a travel site.

Now

Platform engineer

A video streaming service, since 2021

Before

Site reliability engineerA travel site2017–2021
Systems administratorA hosting company2014–2017

Checked by Waypoint

10days, four checks

IdentityOct 10, 2025
We matched a residence permit over video
Current roleOct 14
The streaming service confirmed the role
Work sampleOct 17
Two engineers reviewed his cloud cost report
Sample lessonOct 20
Twenty learners rated it 4.6

Sample lesson

10 min

“Reading a cloud bill”

Rating from twenty learners

4.6 out of 5

Lesson one is freeTypeScript for backend services

Start

Courses

What Kofi teaches

Three courses and 31,330 learners so far. Kofi teaches all three in English, with subtitles in 5 to 12 languages.

EngineeringAdvanced
TypeScript for backend services
Meridian LabSpecialization
Rated 4.6(1,420 reviews)13,800 learners
- 9 weeks
- 6 h a week
- 19 lessons
- Subtitles in 12 languages
$129
EngineeringAdvanced
HTTP, and what a framework hides
Rowan EngineeringCourse
Rated 4.5(1,180 reviews)12,300 learners
- 6 weeks
- 5 h a week
- 16 lessons
- Subtitles in 9 languages
$79
New
EngineeringIntermediate
Cloud costs you can read
Meridian LabCourse
Rated 4.4(350 reviews)5,230 learners
- 4 weeks
- 3 h a week
- 12 lessons
- Subtitles in 5 languages
$69

Cohorts

Learn with Kofi in a live cohort

Thirty learners start on the same Monday, bring the week's work to a live review with Kofi each Thursday, and finish together on a Friday you can see before you book your seat.

Live cohort

TypeScript for backend services

Mon, Nov 2 to Fri, Jan 1, 2027

9 weeks · $129A live review each Thursday

5 of 30 seats left

Reserve a seat

Follow Kofi, and the next cohort lands at the top of your dashboard.

4.5(2,950 ratings)

What learners say about Kofi

By course

TypeScript for backend servicesrated 4.6 (1,420)
HTTP, and what a framework hidesrated 4.5 (1,180)
Cloud costs you can readrated 4.4 (350)

4 weeks ago
“The tutor asked what I thought the error meant before saying anything. Annoying on day one; by week three I was doing it unasked.”
Yusuf K.
HTTP, and what a framework hides
4 months ago
“I finished with a repository I could show in interviews. Two interviewers asked about the project before they asked about anything else on my résumé, and one of them had read the tests. I had spent eight years in retail management, and this was the first thing I had ever built that a stranger could download, install and run on their own machine.”
Grace W.
HTTP, and what a framework hides
2 weeks ago
“The exercises break things on purpose. Fixing the failing run in module three taught me more than any of the lectures I have sat through.”
Diego F.
HTTP, and what a framework hides
2 months ago
“Too basic for me. The last module is what I came for, and it is short.”
Pete L.
HTTP, and what a framework hides
1 month ago
“Kofi reviews the project the way a senior colleague would: short comments, each pointing at one line of your code and asking why it is there.”
Mei C.
Cloud costs you can read
2 months ago
“I use something from this course every week. The notes on failure paid for it.”
Nadia B.
HTTP, and what a framework hides